1 dnl Process this file with autoconf to produce a configure script.
3 dnl NB When updating the version for a release, update LIBRARY_VERSION_INFO
5 AC_INIT([xapian-core], [1.5.0], [https://xapian.org/bugs])
6 dnl See HACKING document for details of the reasons for required versions.
8 dnl Extract from the libtool info manual:
10 dnl Here are a set of rules to help you update your library version information:
12 dnl 1. Start with version information of '0:0:0' for each libtool library.
14 dnl 2. Update the version information only immediately before a public
15 dnl release of your software. More frequent updates are unnecessary,
16 dnl and only guarantee that the current interface number gets larger
19 dnl 3. If the library source code has changed at all since the last
20 dnl update, then increment REVISION ('C:R:A' becomes 'C:r+1:A').
22 dnl 4. If any interfaces have been added, removed, or changed since the
23 dnl last update, increment CURRENT, and set REVISION to 0.
25 dnl 5. If any interfaces have been added since the last public release,
26 dnl then increment AGE.
28 dnl 6. If any interfaces have been removed since the last public release
29 dnl then set AGE to 0.
31 dnl LIBRARY_VERSION_INFO for libxapian1.5
32 dnl 0:0:0 1.5.0 Reset as library renamed
33 LIBRARY_VERSION_INFO=0:0:0
34 AC_SUBST([LIBRARY_VERSION_INFO])
36 LIBRARY_VERSION_SUFFIX=
37 dnl Where xapian.h, etc go.
39 case $PACKAGE_VERSION in
41 dnl Development release series:
42 [dev_series=`echo "$PACKAGE_VERSION"|sed 's/\.[^.]*$//'`]
44 dnl Append version installed programs by default. To specify no suffix,
45 dnl configure with: --program-suffix=
46 test x"$program_suffix" != xNONE || program_suffix=-$dev_series
48 incdir=$incdir/xapian-$dev_series
50 LIBRARY_VERSION_SUFFIX=-$dev_series
54 AC_SUBST([LIBRARY_VERSION_SUFFIX])
57 dnl Check the build directory doesn't contain a space, so we die early with
61 AC_MSG_ERROR([You can't build in a directory whose path contains a space])
65 dnl Check the source directory doesn't contain a space, so we die early with
66 dnl a helpful error. FIXME: Unfortunately, configure seems to choke before
67 dnl it gets to us so this code doesn't get a chance to fire.
70 dnl Note: for in-tree builds, the build directory test above will fire
72 AC_MSG_ERROR([You can't build with sources in a directory whose path contains a space])
76 dnl Check the prefix to install in doesn't contain a space, so we die early with
80 AC_MSG_ERROR([You can't install in a directory whose path contains a space])
84 dnl Note if the user specified a particular C++ compiler so we can give a more
85 dnl appropriate error message if we can't link a simple C++ program.
87 if test -n "$CXX" ; then
88 original_CXX="CXX=$CXX"
89 elif test -n "$CCC" ; then
90 original_CXX="CCC=$CCC"
93 dnl See HACKING document for details of the reasons for required versions.
94 AM_INIT_AUTOMAKE([1.13 -Wportability tar-ustar no-dist-gzip dist-xz std-options])
95 AC_CONFIG_SRCDIR([matcher/multiandpostlist.cc])
97 AC_CONFIG_HEADERS([config.h])
99 AC_CONFIG_MACRO_DIRS([m4])
103 dnl Use libtool to manage our libraries.
105 dnl Default to only building shared libraries.
107 dnl Building both shared and static means having to compile the files which
108 dnl make up the library twice on most platforms. Shared libraries are the
109 dnl better option for most users, and if anyone really wants static libraries,
110 dnl they can configure with --enable-static (or --enable-static=xapian-core if
111 dnl configuring a combined tree with the bindings).
113 dnl We don't export any data items from the library, so it should be safe to
114 dnl enable win32-dll without decorating any declarations specially.
115 LT_INIT([disable-static win32-dll])
117 dnl -no-undefined causes problems on Solaris with Sun CC in C++11 mode, so only
118 dnl pass -no-undefined on platforms where it is required in order to link a
119 dnl shared library at all (Windows is the main one).
121 if test unsupported = "$allow_undefined_flag" ; then
122 NO_UNDEFINED=-no-undefined
124 AC_SUBST(NO_UNDEFINED)
128 dnl A standard "gotcha" for mingw and cygwin users is to not set up their
129 dnl PATH correctly, so that MSDOS FIND.EXE is found before Unix find. Help
130 dnl them out by checking for this condition, rather than letting libtool
131 dnl fail in obscure ways. NB check the *BUILD* OS, not the host one!
133 *mingw* | *cygwin* | pw32*)
134 find /dirunlikelytoexist >/dev/null 2>&1
135 if test $? = 2 ; then
136 dnl Unix find will return 1 if the directory didn't exist, or 0 if
139 *** You appear to have an MSDOS-like FIND.EXE in your PATH ahead of any
140 *** UNIX-like find. This misconfiguration will confuse libtool - you'll need
141 *** to make sure you have a UNIX-like find installed and fix your PATH, then
142 *** rerun configure. For more information, see:
144 *** https://www.cygwin.com/faq/faq.html#faq.using.find
150 dnl Add parameters for aclocal
151 dnl (This must come after AM_INIT_AUTOMAKE, since it modifies ACLOCAL)
152 ACLOCAL="$ACLOCAL $ACLOCAL_FLAGS"
154 dnl disable "maintainer only" rules by default
157 dnl Checks for programs.
162 # Checked: freebsd8.0 openbsd4.6 solaris2.9 solaris2.10
164 linux* | k*bsd*-gnu | freebsd* | openbsd* | solaris*)
165 dnl Vanilla libtool sets this to "unknown" which it then handles as "yes".
166 link_all_deplibs_CXX=no
172 dnl Extract search path from ldconfig which is more reliable than the way
173 dnl vanilla libtool extracts them from ld.so.conf.
174 d=`/sbin/ldconfig -N -X -v 2>&AS_MESSAGE_LOG_FD|$SED 's,^\(/.*\):\( (.*)\)\?$,\1,p;d'|tr '\n' ' '`
175 test -z "$d" || sys_lib_dlsearch_path_spec=$d
180 *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-*-darwin* | *-cegcc*)
181 dnl On these platforms, libtool emits a warning if -no-install is passed,
182 dnl and uses -no-fast-install instead - the least ugly way to avoid that
183 dnl warnings seems to be to duplicate the above list of platforms from
184 dnl libtool and use -no-fast-install on them directly.
185 NO_INSTALL=-no-fast-install ;;
187 NO_INSTALL=-no-install ;;
189 AC_SUBST([NO_INSTALL])
191 dnl For reasons which are beyond me, if autoconf can't find a C++ compiler
192 dnl it will set CXX to g++ (which obviously won't work) rather than actually
193 dnl telling the user that it couldn't find a C++ compiler and telling them
194 dnl to either install one or set CXX if there's one configure failed to find.
195 dnl It's probably worthwhile checking that the C++ compiler actually works
197 if test -n "$CXX" ; then
199 AC_MSG_CHECKING([whether $CXX is a working C++ compiler])
200 AC_CACHE_VAL([xo_cv_cxx_works],
202 AC_TRY_RUN([int main() {}],
205 AC_TRY_LINK([], [], xo_cv_cxx_works=yes, xo_cv_cxx_works=no))
207 AC_MSG_RESULT([$xo_cv_cxx_works])
211 if test no = "$xo_cv_cxx_works" ; then
212 case $original_CXX in
214 dnl CCC is handled in a slightly odd way - if its value isn't an
215 dnl executable (taking PATH into account) then it is ignored!
216 test "$original_CXX" = "CCC=$CXX" || original_CXX=
219 if test -z "$original_CXX" ; then
221 *** You need a working C++ compiler to compile Xapian, but configure failed to
222 *** find one. If you have a working C++ compiler, you can tell configure where
223 *** to find it by invoking it like so:
225 *** ./configure CXX=/opt/bin/c++
229 *** You need a working C++ compiler to compile Xapian, but the compiler you
230 *** specified (with '$original_CXX') doesn't appear to be able to successfully
231 *** compile and link a simple program.
236 dnl Probe for any options needed to enable C++11 support.
237 AX_CXX_COMPILE_STDCXX_11
239 dnl We don't use a C compiler to compile Xapian's code, but on some platforms
240 dnl (e.g. mingw) libtool uses $LTCC which defaults to $CC, and it's also use to
241 dnl build auxiliary tools like snowball and lemon.
244 dnl Check endianness.
247 dnl We want a non-cross-compiling C compiler for building lemon with.
248 if test -z "$CC_FOR_BUILD" ; then
249 if test yes = "$cross_compiling"; then
255 AC_ARG_VAR([CC_FOR_BUILD], [C compiler command for native compilation (needed to compile build tools during cross-builds)])
257 dnl Run tests using the C++ compiler.
260 dnl Enable large file support if possible.
262 dnl With xlC on AIX, -D_LARGE_FILES changes the ABI of std::string, so it
263 dnl also needs to be used when compiling user code.
264 abi_affecting_cxxflags=
265 if $GREP '^#define _LARGE_FILES 1$' confdefs.h > /dev/null 2>&1 ; then
266 abi_affecting_cxxflags=-D_LARGE_FILES
268 AC_SUBST([abi_affecting_cxxflags])
270 AC_PREPROC_IFELSE([AC_LANG_SOURCE([[
271 #if defined __WIN32__ || defined _WIN32
274 ]])], [win32=no], [win32=yes])
276 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [[
280 ]])], [msvc=no], [msvc=yes])
284 AC_SUBST([XAPIAN_LDFLAGS])
285 AC_SUBST([XAPIAN_LIBS])
287 AC_DEFUN([XAPIAN_TEST_LINKER_FLAG],
289 AC_MSG_CHECKING([for $CXX -Wl,$1])
290 AC_CACHE_VAL([xo_cv_ldflag_$2],
292 save_LDFLAGS=$LDFLAGS
293 LDFLAGS="$LDFLAGS -Wl,$1"
295 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
300 LDFLAGS=$save_LDFLAGS
302 AC_MSG_RESULT([$xo_cv_ldflag_$2])
305 dnl Test if the compiler works with $1 added to CXXFLAGS; if it does, add $1 to
306 dnl variable $2. If the test passes, also do $3; if it fails, also do $4.
307 AC_DEFUN([XAPIAN_TEST_CXXFLAGS],
309 XTC_save_CXXFLAGS=$CXXFLAGS
310 CXXFLAGS="$CXXFLAGS $1"
311 AC_TRY_COMPILE([], [],
312 [CXXFLAGS=$XTC_save_CXXFLAGS
315 [CXXFLAGS=$XTC_save_CXXFLAGS
320 if test yesyes = "$GXX$enable_shared" ; then
323 XAPIAN_TEST_LINKER_FLAG([--enable-runtime-pseudo-reloc], [enable_runtime_pseudo_reloc],
324 [ldflags="-Wl,$flag"],
326 dnl Can't use AC_DISABLE_SHARED after AC_PROG_LIBTOOL, but
327 dnl this test needs to be after AC_PROG_LIBTOOL, so we can't
328 dnl just disable the shared build automatically...
329 AC_MSG_ERROR([ld version too old to support a shared build - configure with --disable-shared, or install binutils 2.13.90-20030111-1 or later])
334 dnl Only works for ldflags which can be specified anywhere on the link line.
337 dnl Preserve the default CXXFLAGS.
338 save_CXXFLAGS=$CXXFLAGS
340 dnl x86 has excess precision issues with 387 FP instructions, which are
341 dnl avoided by using SSE instructions instead. This is also faster (~6% in
342 dnl a CPU bound testcase).
344 [AS_HELP_STRING([--disable-sse],
345 [disable use of SSE FP instructions on x86])]
346 [AS_HELP_STRING([[--enable-sse[=sse|sse2]]],
347 [set which SSE FP instructions to use on x86 (default: sse2)])],
348 [case ${enableval} in
350 *) AC_MSG_ERROR([bad value ${enableval} for --enable-sse or --disable-sse]) ;;
354 dnl Some versions of Sun's C++ compiler reportedly need an explicit -lm.
355 dnl The maths functions we use include: exp log ceil fabs sqrt
356 AC_MSG_CHECKING([if -lm is required for maths functions])
357 dnl Don't use constant arguments as the compiler might simply evaluate the
358 dnl whole expression at compile time, and it might inline certain functions
359 dnl so test several functions. Also write results using printf() so that
360 dnl the compiler can't optimise away the computations.
361 AC_TRY_LINK([#ifdef __SUNPRO_CC
362 #error Need -lm for Sun C++ 5.9 under libtool 2.2.10
367 using namespace std;], [
368 double a = log(ceil(time(NULL)/7.0));
369 printf("%f %f %f\n", a, sqrt(a), exp(fabs(a - 12345.6)));
370 ], [AC_MSG_RESULT([no])], [
372 AC_TRY_LINK([#include <cmath>
375 using namespace std;], [
376 double a = log(ceil(time(NULL)/7.0));
377 printf("%f %f %f\n", a, sqrt(a), exp(fabs(a - 12345.6)));],
378 [AC_MSG_RESULT([yes])],
379 [AC_MSG_ERROR([Failed to link a C++ program using <cmath>])
383 dnl C++11 should have log2(double), but keep this check for now to allow for
384 dnl compilers with incomplete library support for C++11.
385 AC_CHECK_DECLS([log2(double)], [], [],
387 using namespace std;])
389 dnl exp10() is a GNU libc extension.
390 AC_CHECK_DECLS([exp10(double)], [], [],
392 using namespace std;])
394 dnl Darwin provides __exp10().
395 AC_CHECK_DECLS([__exp10(double)], [], [],
397 using namespace std;])
399 dnl GCC provides __builtin_exp10() (but notably clang doesn't currently).
400 dnl On mingw, __builtin_exp10() causes GCC to generate a call to exp10() which
401 dnl then fails to link, so perform a link check here to catch that.
402 AC_CACHE_CHECK([for __builtin_exp10], ac_cv_link___builtin_exp10, [
403 AC_LINK_IFELSE([AC_LANG_PROGRAM([[
406 using namespace std;]],
407 [[printf("%f", __builtin_exp10(double(time(NULL)*1e-8)));]])],
408 [ac_cv_link___builtin_exp10=yes],
409 [ac_cv_link___builtin_exp10=no])
411 if test $ac_cv_link___builtin_exp10 = yes ; then
412 AC_DEFINE([HAVE___BUILTIN_EXP10], [1], [Define to 1 if you have the `__builtin_exp10' function.])
415 dnl See if <typeinfo> can be used in the testsuite - at least for GCC and xlC,
416 dnl compilation of the test code below fails if RTTI isn't being generated
417 dnl (g++ -fno-rtti, or by default with xlC).
418 AC_MSG_CHECKING([if RTTI is supported])
419 save_CXXFLAGS=$CXXFLAGS
420 dnl xlC issues a warning for typeid() being used without RTTI being enabled,
421 dnl so for this test we pass the xlC option to make that warning into an error.
422 XAPIAN_TEST_CXXFLAGS([-qhaltonmsg=1540-2412], [CXXFLAGS])
425 #include <typeinfo>],
430 } catch (std::exception & e) {
431 return typeid(e).name()[0];
434 AC_DEFINE([USE_RTTI], [1], [Define if the testsuite can use RTTI]),
436 CXXFLAGS=$save_CXXFLAGS
438 AC_CHECK_DECLS([__builtin_bswap16, __builtin_bswap32], [], [], [ ])
439 AC_CHECK_DECLS([__builtin_clz, __builtin_clzl, __builtin_clzll], [], [], [ ])
440 AC_CHECK_DECLS([__builtin_ctz, __builtin_ctzl, __builtin_ctzll], [], [], [ ])
441 AC_CHECK_DECLS([__builtin_expect], [], [], [ ])
442 AC_CHECK_DECLS([__builtin_popcount, __builtin_popcountl, __builtin_popcountll], [], [], [ ])
443 AC_CHECK_DECLS([__popcnt, __popcnt64], [], [], [#include <intrin.h>])
445 dnl Check for time functions.
446 AC_CHECK_FUNCS([clock_gettime sleep nanosleep gettimeofday ftime])
450 dnl For _ftime64() on mingw we need to tell it we're happy to require
451 dnl MSVCRT 6.10 or higher, which isn't too onerous a requirement it seems.
452 AC_DEFINE([__MSVCRT_VERSION__], [0x0601], [Define on mingw to the minimum msvcrt version to assume])
453 AC_DEFINE([MINGW_HAS_SECURE_API], [1], [Define on mingw to get _s suffixed "secure" functions declared in headers])
457 dnl We use timer_create() if available to implement a search time limit.
459 AC_SEARCH_LIBS([timer_create], [rt],
461 AC_MSG_CHECKING([for timer_create() usability])
462 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
463 [[#if defined _AIX || defined __GNU__
464 #error timer_create known not to work
466 [AC_MSG_RESULT([yes])
467 XAPIAN_LIBS="$LIBS $XAPIAN_LIBS"
468 AC_DEFINE([HAVE_TIMER_CREATE], [1], [Define to 1 if you have the 'timer_create' function.])]
475 dnl Used by tests/soaktest/soaktest.cc
476 AC_CHECK_FUNCS([srandom random])
478 dnl Used by tests/harness/testsuite.cc
479 AC_CHECK_FUNCS([sigaction])
480 AC_MSG_CHECKING([for sigsetjmp and siglongjmp])
481 AC_TRY_COMPILE([#include <setjmp.h>],
482 [sigjmp_buf jb; if (sigsetjmp(jb, 1)) { siglongjmp(jb, 1); }],
483 AC_DEFINE([HAVE_SIGSETJMP], [1], [Define to 1 if you have the 'sigsetjmp' function])
484 AC_MSG_RESULT([yes]),
487 dnl Used by tests/harness/cputimer.cc:
488 AC_CHECK_FUNCS([getrusage times sysconf])
490 dnl Used by tests/api_replicate.cc.
492 dnl Solaris < 10 only has putenv().
494 dnl Microsoft have marked putenv() as deprecated, so we use _putenv_s() under
495 dnl MSVC to avoid deprecation warnings. We probe here since mingw doesn't
496 dnl currently (v3.20) provide _putenv_s(), so we can't just use it conditional
497 dnl on __WIN32__ being defined. We need to check for a declaration rather
498 dnl than just seeing if the symbol exists, as the symbol will exist in the C
499 dnl runtime DLL even if mingw doesn't declare it in its headers.
500 AC_CHECK_FUNCS([setenv])
501 AC_CHECK_DECLS([_putenv_s(const char *,const char *)], [], [],
502 [#include <stdlib.h>])
504 dnl See if we have closefrom(), or some functions that are useful to implement
505 dnl closefrom() on platforms which don't provide it.
506 AC_CHECK_FUNCS([closefrom getdirentries getrlimit])
508 dnl See if ftime returns void (as it does on mingw)
509 AC_MSG_CHECKING([return type of ftime])
510 if test $ac_cv_func_ftime = yes ; then
511 AC_TRY_COMPILE([#include <sys/timeb.h>],
512 [struct timeb tp; int i = ftime(&tp);],
513 AC_MSG_RESULT([int]),
514 AC_MSG_RESULT([void])
515 AC_DEFINE([FTIME_RETURNS_VOID], [1], [Define if ftime returns void]))
518 dnl Check how to find the hostname: uname() in sys/utsname.h, or gethostname()
519 dnl Don't use default includes as inttypes.h is found by Compaq C but not C++
520 dnl so it causes all header probes to fail.
521 AC_CHECK_HEADERS([sys/utsname.h], [], [], [ ])
522 AC_CHECK_FUNCS([gethostname])
524 dnl mingw (for instance) lacks ssize_t
531 AC_CHECK_SIZEOF([short])
532 AC_CHECK_SIZEOF([int])
533 AC_CHECK_SIZEOF([long])
534 AC_CHECK_SIZEOF([long long])
536 AC_CHECK_HEADERS([sys/types.h])
537 AC_CHECK_SIZEOF([off_t])
539 AC_MSG_CHECKING([for 32 bit integer type])
541 "$ac_cv_sizeof_int") INT32_T=int ;;
542 "$ac_cv_sizeof_long") INT32_T=long ;;
543 "$ac_cv_sizeof_short") INT32_T=short ;;
545 AC_MSG_RESULT([none found])
546 AC_MSG_ERROR([No 32 bit integer type found])
548 AC_MSG_RESULT([$INT32_T])
550 AC_MSG_CHECKING([for 64 bit integer type])
552 "$ac_cv_sizeof_int") INT64_T=int ;;
553 "$ac_cv_sizeof_long") INT64_T=long ;;
554 "$ac_cv_sizeof_long_long") INT64_T='long long' ;;
556 AC_MSG_RESULT([none found])
557 AC_MSG_ERROR([No 64 bit integer type found])
559 AC_MSG_RESULT([$INT64_T])
561 dnl Used to avoid undefined behaviour left shifting file sizes.
562 AC_MSG_CHECKING([for unsigned equivalent of off_t])
563 case $ac_cv_sizeof_off_t in
564 "$ac_cv_sizeof_int") UNSIGNED_OFF_T=unsigned ;;
565 "$ac_cv_sizeof_long") UNSIGNED_OFF_T='unsigned long' ;;
566 "$ac_cv_sizeof_long_long") UNSIGNED_OFF_T='unsigned long long' ;;
568 AC_MSG_RESULT([none found])
569 AC_MSG_ERROR([No unsigned type equivalent to off_t found])
571 AC_DEFINE_UNQUOTED([UNSIGNED_OFF_T], [$UNSIGNED_OFF_T], [Define to an unsigned type equivalent to off_t])
572 AC_MSG_RESULT([$UNSIGNED_OFF_T])
574 dnl Check for perl (needed to generate some sources and documentation).
575 AC_PATH_PROG([PERL], [perl], [])
576 if test x$USE_MAINTAINER_MODE = xyes; then
577 test -z "$PERL" && AC_MSG_ERROR([perl is required in maintainer mode])
580 AC_ARG_ENABLE([64bit_docid],
581 [AS_HELP_STRING([--enable-64bit-docid], [enable 64bit docid [default=no]])],
582 [case ${enableval} in
584 *) AC_MSG_ERROR([bad value ${enableval} for --enable-64bit-docid]) ;;
586 [enable_64bit_docid=no])
588 AC_ARG_ENABLE([64bit_termcount],
589 [AS_HELP_STRING([--enable-64bit-termcount], [enable 64bit termcount [default=no]])],
590 [case ${enableval} in
592 *) AC_MSG_ERROR([bad value ${enableval} for --enable-64bit-termcount]) ;;
594 [enable_64bit_termcount=no])
596 AC_ARG_ENABLE([documentation],
597 [AS_HELP_STRING([--enable-documentation], [enable make rules to rebuild documentation [default=maintainer-mode]])],
598 [case ${enableval} in
600 *) AC_MSG_ERROR([bad value ${enableval} for --enable-documentation]) ;;
602 [enable_documentation=$USE_MAINTAINER_MODE])
603 AM_CONDITIONAL([DOCUMENTATION_RULES], [test x"$enable_documentation" = xyes])
604 AM_CONDITIONAL([MAINTAINER_NO_DOCS], [test x"$USE_MAINTAINER_MODE$enable_documentation" = xyesno])
606 if test x"$enable_documentation" = xyes ; then
607 dnl Checks for dot. (Diagrams in the documentation)
608 AC_PATH_PROG([DOT], [dot])
609 test -z "$DOT" && AC_MSG_ERROR([dot (part of the graphviz package) is required to build documentation])
610 DOXYGEN_DOT_PATH=`echo "$DOT" | sed 's!/dot$!!'`
611 AC_SUBST([DOXYGEN_DOT_PATH])
613 dnl Check for doxygen. (Needed to make some more of the documentation)
614 AC_PATH_PROG([DOXYGEN], [doxygen], [])
615 test -z "$DOXYGEN" && AC_MSG_ERROR([doxygen is required to build documentation])
617 dnl Check for help2man. (Needed to make man pages from "--help" output).
618 AC_PATH_PROG([HELP2MAN], [help2man], [])
619 test -z "$HELP2MAN" && AC_MSG_ERROR([help2man is required to build documentation])
621 dnl Check for rst2html. (Needed to make HTML from reStructuredText format)
622 dnl Also look for rst2html.py, which archlinux reportedly installs it as.
623 AC_PATH_PROGS([RST2HTML], [rst2html rst2html.py], [])
624 test -z "$RST2HTML" && AC_MSG_ERROR([rst2html is required to build documentation (try package python-docutils)])
626 dnl Check for pngcrush, which we optionally use to reduce the size of the
627 dnl PNG files which doxygen generates. We can get by without it, so don't
628 dnl fail here if it's not found.
629 AC_PATH_PROG([PNGCRUSH], [pngcrush], [])
632 dnl Checks for header files.
633 AC_CHECK_HEADERS([fcntl.h limits.h sys/errno.h sys/select.h], [], [], [ ])
634 AC_CHECK_HEADERS([sys/resource.h],
635 [], [], [#include <sys/types.h>])
637 dnl cxxabi.h was added in GCC 3.1, but clang lies and defines __GNUC__ yet
638 dnl doesn't seem to reliably provide this header, so probe for it.
639 AC_CHECK_HEADERS([cxxabi.h], [], [], [ ])
641 dnl If valgrind is installed and new enough, we use it for leak checking in the
642 dnl testsuite. If VALGRIND is set to an empty value, then skip the check and
643 dnl don't use valgrind.
644 if test -n "${VALGRIND-unset}" ; then
645 AC_PATH_PROG([VALGRIND], [valgrind], [])
646 if test -n "$VALGRIND" ; then
647 dnl Check that the installed valgrind version works, and supports the
648 dnl options we use. This means we won't try to use valgrind < 3.3.0
649 dnl (released 7/12/2007) since before that --log-file didn't expand
650 dnl %p (and appended the process id).
652 dnl No need to check for VALGRIND_COUNT_LEAKS now - that was added before
654 AC_MSG_CHECKING([if valgrind supports --log-file with %p and --child-silent-after-fork=yes])
655 vglog=config.vglog.%p.tmp
656 vglogwild="config.vglog.*.tmp*"
658 if $VALGRIND --log-file="$vglog" --child-silent-after-fork=yes -q true 2>&AS_MESSAGE_LOG_FD ; then
659 for f in $vglogwild ; do
661 $vglog*) VALGRIND= ;;
664 if test x"$VALGRIND" = x ; then
668 AC_CHECK_HEADERS([valgrind/memcheck.h], [], [VALGRIND=], [ ])
671 dnl The valgrind detected doesn't seem to work! Perhaps this is an
672 dnl x86_64 box with a 32 bit valgrind.
673 AC_MSG_RESULT([$VALGRIND doesn't work])
680 if test -n "$VALGRIND" ; then
681 AC_DEFINE([HAVE_VALGRIND], [1], [Define if a suitable valgrind is installed])
684 dnl If eatmydata is installed, we run the testsuite under it to speed it up.
685 dnl If EATMYDATA is set to an empty value, then skip this check and don't use
687 if test -n "${EATMYDATA-unset}" ; then
688 AC_PATH_PROG([EATMYDATA], [eatmydata], [])
691 dnl Checks for library functions.
695 AC_CACHE_CHECK([for sys_errlist and sys_nerr], ac_cv_sys_errlist_and_sys_nerr, [
696 AC_LINK_IFELSE([AC_LANG_PROGRAM(
697 dnl On Linux, sys_errlist and sys_nerr need <stdio.h>, though the man page
698 dnl says <errno.h>. The man page seems to match other platforms such as
699 dnl NetBSD, so include both headers to ensure we get them.
701 #include <stdio.h>]],
702 [[ printf("%s", sys_errlist[sys_nerr - 1]);]])],
703 [ ac_cv_sys_errlist_and_sys_nerr=yes ],
704 [ ac_cv_sys_errlist_and_sys_nerr=no ])
706 if test "x$ac_cv_sys_errlist_and_sys_nerr" = "xyes" ; then
707 AC_DEFINE([HAVE_SYS_ERRLIST_AND_SYS_NERR], [1],[Define if you have 'sys_errlist' and 'sys_nerr'])
710 AC_CACHE_CHECK([for _sys_errlist and _sys_nerr], ac_cv__sys_errlist_and__sys_nerr, [
711 AC_LINK_IFELSE([AC_LANG_PROGRAM(
713 #include <stdio.h>]],
714 [[ printf("%s", _sys_errlist[_sys_nerr - 1]);]])],
715 [ ac_cv__sys_errlist_and__sys_nerr=yes ],
716 [ ac_cv__sys_errlist_and__sys_nerr=no
719 if test "x$ac_cv__sys_errlist_and__sys_nerr" = "xyes" ; then
720 AC_DEFINE([HAVE__SYS_ERRLIST_AND__SYS_NERR], [1],[Define if you have '_sys_errlist' and '_sys_nerr'])
723 dnl Check that snprintf actually works as it's meant to.
725 dnl Linux 'man snprintf' warns:
726 dnl Linux libc4.[45] does not have a snprintf, but provides a libbsd that
727 dnl contains an snprintf equivalent to sprintf, i.e., one that ignores the
728 dnl size argument. Thus, the use of snprintf with early libc4 leads to
729 dnl serious security problems.
731 dnl It also warns that glibc < 2.0.6 (and presumably other pre-C99
732 dnl implementations) return -1 when truncating so check that we get the
733 dnl ISO C99 semantics for the returned length when truncating. If we
734 dnl have a working snprintf but with non-ISO return semantics, handle
735 dnl that case separately as it may still be useful in many cases.
737 dnl mingw has _snprintf so check for that too.
738 AC_MSG_CHECKING([for working ISO C99 conforming snprintf])
739 ac_cv_func_snprintf_noniso=no
740 for func in snprintf _snprintf ; do
748 dnl Return different exit status for each error so we can see which
749 dnl check failed by consulting config.log.
751 char buffer[4] = "abc";
752 int res1 = $func(buffer, 2, "%s", "XYZ");
753 if (memcmp(buffer, "X\0c", 4) != 0) return 2;
754 int res2 = $func(buffer, 2, "%x", 0x12);
755 if (memcmp(buffer, "1\0c", 4) != 0) return 3;
756 if (res1 == -1 && res2 == -1) return 15; /* Pre-ISO semantics. */
757 if (res1 != 3) return 4;
758 if (res2 != 2) return 5;
761 [ac_cv_func_snprintf=$func;break],
763 if test 15no = "$?$ac_cv_func_snprintf_noniso" ; then
764 ac_cv_func_snprintf_noniso=$func
766 ac_cv_func_snprintf=no
768 [ac_cv_func_snprintf=unknown;break]
771 AC_MSG_RESULT([$ac_cv_func_snprintf])
772 case $ac_cv_func_snprintf in
774 AC_MSG_CHECKING([for working non-ISO C99 conforming snprintf])
775 AC_MSG_RESULT([$ac_cv_func_snprintf_noniso])
776 if test no != "$ac_cv_func_snprintf_noniso" ; then
777 AC_DEFINE_UNQUOTED([SNPRINTF], [$ac_cv_func_snprintf_noniso],
778 [Define to the name of a function implementing snprintf but not caring about ISO C99 return value semantics (if one exists)])
782 dnl be conservative when crosscompiling
785 AC_DEFINE_UNQUOTED([SNPRINTF_ISO], [$ac_cv_func_snprintf],
786 [Define to the name of a function implementing snprintf with ISO C99 semantics (if one exists)])
787 AC_DEFINE_UNQUOTED([SNPRINTF], [$ac_cv_func_snprintf],
788 [Define to the name of a function implementing snprintf but not caring about ISO C99 return value semantics (if one exists)])
792 dnl ***************************
793 dnl * Select modules to build *
794 dnl ***************************
796 dnl Check which database backends should be built.
798 AC_DEFUN([_XAPIAN_BACKEND_ENABLE],
799 [AC_ARG_ENABLE([backend_$1],
800 [AS_HELP_STRING([--enable-backend-$1], [build the $1 database backend [default=$3]])],
803 *) AC_MSG_ERROR([Invalid option: '--enable-backend-$1=$enableval']) ;;
804 esac], [enable_backend_$1=$2])
807 AC_DEFUN([XAPIAN_BACKEND_ENABLE],
808 [_XAPIAN_BACKEND_ENABLE([$1],
809 m4_default([$2], [yes]),
810 m4_default([$3], [yes]))
813 dnl When adding a new backend, update INSTALL too.
814 XAPIAN_BACKEND_ENABLE([glass])
815 XAPIAN_BACKEND_ENABLE([inmemory])
816 default_enable_backend_remote=yes
819 dnl We don't currently support the remote backend on this platform so
820 dnl disable it by default.
821 default_enable_backend_remote=no
824 XAPIAN_BACKEND_ENABLE([remote], [$default_enable_backend_remote], [yes (except for MSDOS)])
829 case $enable_backend_glass in
831 dnl We use zlib for compressing tags in glass. We could
832 dnl automatically disable support if zlib isn't found, but overall that
833 dnl probably does more harm than good - it's most likely that someone just
834 dnl forgot to install the -dev package for zlib.
836 dnl Similarly for uuid support.
838 dnl Check for zlib.h.
839 AC_CHECK_HEADERS([zlib.h], [], [
840 AC_MSG_ERROR([zlib.h not found - required for glass (you may need to install the zlib1g-dev or zlib-devel package)])
843 dnl Check for zlibVersion in -lz.
845 dnl mingw build needs -lzlib or -lzdll.
846 AC_SEARCH_LIBS([zlibVersion], [z zlib zdll], [], [
847 AC_MSG_ERROR([zlibVersion() not found in -lz, -lzlib, or -lzdll - required for glass (you may need to install the zlib1g-dev or zlib-devel package)])
849 if test x != x"$LIBS" ; then
850 XAPIAN_LIBS="$XAPIAN_LIBS $LIBS"
854 dnl Find the UUID library (from e2fsprogs/util-linux-ng, not the OSSP one).
856 case $host_os-$win32 in
857 *-yes | *cygwin*) dnl Use built-in win32 API.
859 AC_DEFINE([USE_WIN32_UUID_API], [1],
860 [Define to 1 to use UuidCreate(), etc])
861 if test $win32 = yes ; then
862 dnl We need -lws2_32 for htonl(), etc, but not for Cygwin which
863 dnl provides these functions in its libc.
866 XAPIAN_LIBS="$XAPIAN_LIBS -lrpcrt4"
869 dnl Check for uuid/uuid.h (e2fsprogs/util-linux-ng) or uuid.h
870 dnl (FreeBSD/NetBSD).
871 AC_CHECK_HEADERS([uuid/uuid.h], [
872 dnl util-linux-ng's uuid/uuid.h found - check for uuid_generate in
875 AC_SEARCH_LIBS([uuid_generate], [uuid], [], [
876 AC_MSG_ERROR([uuid_generate() not found in -luuid - required for glass (you may need to install the uuid-dev, libuuid-devel or e2fsprogs-devel package)])
878 if test x != x"$LIBS" ; then
879 XAPIAN_LIBS="$XAPIAN_LIBS $LIBS"
882 dnl Try uuid.h as found on FreeBSD/NetBSD, with associated code in libc.
883 AC_CHECK_HEADERS([uuid.h], [
884 dnl Check for uuid_create with no extra libraries required.
885 AC_CHECK_FUNC([uuid_create], [], [
886 AC_MSG_ERROR([uuid.h found, but uuid_create() not found. You probably wants to install libuuid from util-linux-ng or e2fsprogs (you may need to install the uuid-dev, libuuid-devel or e2fsprogs-devel package)])
889 dnl Especially useful for Android.
890 AC_MSG_CHECKING([if host platform supports /proc/sys/kernel/random/uuid])
894 AC_DEFINE([USE_PROC_FOR_UUID], [1],
895 [Define to 1 to read UUID from '/proc/sys/kernel/random/uuid'])
900 AC_MSG_ERROR([Failed to find a way to generate UUIDs, required for glass backends (you may need to install the uuid-dev, libuuid-devel or e2fsprogs-devel package)])
908 dnl Older versions of libuuid (such as that on CentOS 4.7) don't have
909 dnl uuid_unparse_lower(), only uuid_unparse().
910 AC_LINK_IFELSE([AC_LANG_CALL([], [uuid_unparse_lower])],
912 AC_DEFINE([HAVE_UUID_UNPARSE_LOWER], [1],
913 [Define to 1 if you have the 'uuid_unparse_lower' function.])
919 dnl DJGPP has a dummy implementation of fork which always fails.
921 dnl For disk-based backends, use flock() for locking, which doesn't need
922 dnl fork() or socketpair().
923 AC_DEFINE([FLINTLOCK_USE_FLOCK], 1, [Define to use flock() for flint-compatible locking])
928 AM_CONDITIONAL([USE_PROC_FOR_UUID], [test "$use_proc_for_uuid" = 1])
929 AM_CONDITIONAL([USE_WIN32_UUID_API], [test "$use_win32_uuid_api" = 1])
931 if test "$enable_backend_remote" = yes ; then
932 case $host_os-$win32 in
934 dnl For mingw and msvc we have an alternative implementation which
935 dnl doesn't need fork() or socketpair().
937 dnl We need -lws2_32 for getaddrinfo(), etc.
939 dnl Vista is needed for the AI_ADDRCONFIG flag to getaddrinfo().
940 AC_DEFINE([WINVER], [0x600],
941 [Version of Windows to assume (0x600 => Vista).])
942 AC_DEFINE([_WIN32_WINNT], [WINVER],
943 [Version of Windows to assume.])
946 dnl DJGPP has a dummy implementation of fork which always fails. If
947 dnl someone actually wanted remote backend support, then DJGPP has a
948 dnl pthreads port, so using threads like we do on Windows would make more
950 AC_MSG_ERROR([The remote backend is not currently supported on this platform.])
953 dnl On Unix, we need fork and socketpair for the remotebackend.
955 AC_CHECK_FUNCS([fork], [], [
956 AC_MSG_ERROR([fork() required for the remote backend - if an extra library is needed, pass LIBS=-lfoo to configure. Or --disable-backend-remote to disable it.)])
958 dnl Check if -lsocket is required for socketpair (Solaris needs it).
959 dnl And on Haiku it's in -lnetwork.
960 AC_SEARCH_LIBS([socketpair], [socket network], [], [
961 AC_MSG_ERROR([socketpair() required for the remote backend - if an extra library is needed, pass LIBS=-lfoo to configure. Or --disable-backend-remote to disable it.)])
963 AC_DEFINE([HAVE_SOCKETPAIR], [1],
964 [Define to 1 if you have the 'socketpair' function.])
965 dnl Check if extra libraries are needed for getaddrinfo or inet_ntop()
966 dnl (e.g. on Solaris).
968 dnl We're currently assuming that any system that is worth trying to
969 dnl support has getaddrinfo() and inet_ntop(), since these are the
970 dnl standard route for supporting IPv6, and that's pretty much essential
971 dnl for platforms to support now.
972 AC_SEARCH_LIBS([getaddrinfo], [nsl socket], [], [
973 AC_MSG_ERROR([getaddrinfo() required for the remote backend - if an extra library is needed, pass LIBS=-lfoo to configure. Or --disable-backend-remote to disable it.)])
975 AC_SEARCH_LIBS([inet_ntop], [nsl socket], [], [
976 AC_MSG_ERROR([inet_ntop() required for the remote backend - if an extra library is needed, pass LIBS=-lfoo to configure. Or --disable-backend-remote to disable it.)])
978 XAPIAN_LIBS="$XAPIAN_LIBS $LIBS"
986 if test "$win32_need_lws2_32" = 1 ; then
987 XAPIAN_LIBS="$XAPIAN_LIBS -lws2_32"
990 AC_ARG_ENABLE([visibility],
991 [AS_HELP_STRING([--disable-visibility], [disable use of GCC visibility])],
992 [case ${enableval} in
994 *) AC_MSG_ERROR([bad value ${enableval} for --disable-visibility]) ;;
998 if test "`pwd`" != "`cd $srcdir;pwd`" ; then
1001 AM_CONDITIONAL([VPATH_BUILD], [test yes = "$vpath_build"])
1003 dnl Turn off compilation of anything that we don't have the requirements for
1005 dnl Set conditionals to specify what we compile
1007 AM_CONDITIONAL([BUILD_BACKEND_GLASS], [test yes = "$enable_backend_glass"])
1008 AM_CONDITIONAL([BUILD_BACKEND_INMEMORY], [test yes = "$enable_backend_inmemory"])
1009 AM_CONDITIONAL([BUILD_BACKEND_REMOTE], [test yes = "$enable_backend_remote"])
1010 AM_CONDITIONAL([BUILD_BACKEND_TOOLS],
1011 [test no != "$enable_backend_glass"])
1013 dnl Decide if we should use the zlib-vg.so LD_PRELOAD hack.
1015 if test -n "$VALGRIND" ; then
1017 linux*) use_zlib_vg=yes ;;
1020 AM_CONDITIONAL([USE_ZLIB_VG], [test yes = "$use_zlib_vg"])
1022 dnl See if we have fdatasync, and what libraries are needed for it.
1023 dnl We need to actually check for a declaration as OS X has a dummy
1024 dnl implementation in the library which is not prototyped in any header.
1025 AC_CHECK_DECL([fdatasync(int)], [
1027 AC_SEARCH_LIBS([fdatasync], [rt], [XAPIAN_LIBS="$LIBS $XAPIAN_LIBS"])
1029 AC_CHECK_FUNCS([fdatasync])
1031 [ac_cv_func_fdatasync=no],
1032 [#include <unistd.h>]
1035 AC_CHECK_FUNCS([fsync])
1036 AC_CHECK_FUNCS([posix_fadvise])
1037 if test "$win32" = no ; then
1038 dnl ftruncate() under Wine seems to be buggy and sometimes fails, though
1039 dnl a cut-down reproducer seems fine. For now just avoid ftruncate()
1040 dnl entirely on this platform - we'll fallback to lseek() + write() of a
1041 dnl single zero byte, which is pretty efficient.
1042 AC_CHECK_FUNCS([ftruncate])
1045 dnl HP-UX has pread and pwrite, but they don't work! Apparently this problem
1046 dnl manifests when largefile support is enabled, and we definitely want that
1047 dnl so don't use pread or pwrite on HP-UX.
1050 AC_MSG_CHECKING([for pread])
1051 AC_MSG_RESULT([present but broken on $host_os])
1052 AC_MSG_CHECKING([for pwrite])
1053 AC_MSG_RESULT([present but broken on $host_os])
1056 AC_CHECK_FUNC([pread],
1057 [AC_DEFINE([HAVE_PREAD], [1],
1058 [Define if pread is available on this system])
1059 AC_MSG_CHECKING([for any prototype needed for pread])
1060 AC_CACHE_VAL([xo_cv_pread_prototype],
1063 'extern "C" ssize_t pread(int, void *, size_t, off_t) throw ();' \
1064 'extern "C" ssize_t pread(int, void *, size_t, off_t);' ; do
1066 #include <sys/types.h>
1071 pread(1, b, 256, 20);
1073 xo_cv_pread_prototype="$p"
1077 if test -z "$xo_cv_pread_prototype"; then
1078 AC_MSG_RESULT([not found])
1079 AC_MSG_ERROR([Failed to find working prototype for pread])
1082 if test " " = "$xo_cv_pread_prototype" ; then
1083 AC_MSG_RESULT([none required])
1085 AC_MSG_RESULT([$xo_cv_pread_prototype])
1086 AC_DEFINE_UNQUOTED([PREAD_PROTOTYPE], [$xo_cv_pread_prototype],
1087 [explicit prototype needed for pread (if any)])
1090 AC_CHECK_FUNC([pwrite],
1091 [AC_DEFINE([HAVE_PWRITE], [1],
1092 [Define if pwrite is available on this system])
1093 AC_MSG_CHECKING([for any prototype needed for pwrite])
1094 AC_CACHE_VAL([xo_cv_pwrite_prototype],
1097 'extern "C" ssize_t pwrite(int, const void *, size_t, off_t) throw ();' \
1098 'extern "C" ssize_t pwrite(int, const void *, size_t, off_t);' ; do
1100 #include <sys/types.h>
1104 const char *p = "hello";
1105 pwrite(1, p, 5, 20);
1107 xo_cv_pwrite_prototype="$p"
1111 if test -z "$xo_cv_pwrite_prototype"; then
1112 AC_MSG_RESULT([not found])
1113 AC_MSG_ERROR([Failed to find working prototype for pwrite])
1116 if test " " = "$xo_cv_pwrite_prototype" ; then
1117 AC_MSG_RESULT([none required])
1119 AC_MSG_RESULT([$xo_cv_pwrite_prototype])
1120 AC_DEFINE_UNQUOTED([PWRITE_PROTOTYPE], [$xo_cv_pwrite_prototype],
1121 [explicit prototype needed for pwrite (if any)])
1127 AC_MSG_CHECKING([for directory separator(s)])
1128 case $host_os-$win32 in
1129 *-yes | cygwin* | os2* | *djgpp* | *msdos* )
1130 AC_MSG_RESULT([/ and \\])
1131 AC_DEFINE([DIR_SEPS], ["/\\"], [directory separator(s) as a character or string literal])
1132 AC_DEFINE([DIR_SEPS_LIST], [{ '/', '\\' }], [directory separator(s) as an initialiser list])
1136 AC_DEFINE([DIR_SEPS], ['/'], [directory separator(s) as a character or string literal])
1137 AC_DEFINE([DIR_SEPS_LIST], [{ '/' }], [directory separator(s) as an initialiser list])
1141 AC_CHECK_FUNCS([link])
1143 dnl *************************
1144 dnl * Set debugging options *
1145 dnl *************************
1147 dnl Which assertion types to enable in the code.
1149 AC_ARG_ENABLE([assertions],
1150 [AS_HELP_STRING([--enable-assertions], [enable debug assertions (no|partial|yes) [default=no]])],
1154 AC_MSG_ERROR([Invalid option: '--enable-assertions=$enableval']) ;;
1157 AC_ARG_ENABLE([log],
1158 [AS_HELP_STRING([--enable-log], [generate a log of methods called, etc (no|yes|profile) [default=no]])],
1162 AC_MSG_ERROR(['--enable-log=profile' is no longer supported - see https://trac.xapian.org/wiki/ProfilingXapian for alternatives.]) ;;
1164 AC_MSG_ERROR([Invalid option: '--enable-log=$enableval']) ;;
1167 dnl Set defines according to the --enable-assertions and --enable-log options
1170 if test yes = "$enable_assertions" || test partial = "$enable_assertions" ; then
1171 AC_DEFINE([XAPIAN_ASSERTIONS],,
1172 [Define if you want assertions (causes some slow-down)])
1175 if test yes = "$enable_assertions"; then
1176 AC_DEFINE([XAPIAN_ASSERTIONS_PARANOID],,
1177 [Define if you want paranoid assertions (causes significant slow-down)])
1180 if test yes = "$enable_log"; then
1181 AC_DEFINE([XAPIAN_DEBUG_LOG],,
1182 [Define if you want a log of methods called and other debug messages])
1185 dnl ******************************
1186 dnl * Set special compiler flags *
1187 dnl ******************************
1189 dnl Set flags to control warnings (enable more, or disable annoying ones).
1191 if test yes = "$GXX"; then
1192 dnl Intel's C++ compiler and clang both lie and define __GNUC__, so check which
1193 dnl we actually have, as neither is really 100% compatible.
1194 case `echo __INTEL_COMPILER __clang__|$CXX -E - 2>&AS_MESSAGE_LOG_FD|grep -v '^#'` in
1195 *__INTEL_COMPILER*__clang__*)
1196 dnl GCC (since neither substituted):
1198 dnl The exact format of g++ --version seems to change with almost every
1199 dnl minor release so use the preprocessor macros which should be more
1201 AC_MSG_CHECKING([for version of $CXX])
1202 gxx_version=`echo __GNUC__.__GNUC_MINOR__.__GNUC_PATCHLEVEL__|$CXX -E -|sed '/^#/d;s/ //g'`
1203 AC_MSG_RESULT([GCC $gxx_version])
1205 case $gxx_version in
1206 [[0123]].*|4.[[0-7]].*)
1207 AC_MSG_ERROR([Xapian requires GCC 4.8 or later])
1211 dnl -Wundef was supported by g++ 3.0.
1213 dnl -Wlogical-op and -Wmissing-declarations (for C++) were added in
1216 dnl -Wdouble-promotion was added in GCC 4.6.
1218 dnl -Winit-self was added in GCC 3.4, but for GCC < 4.7 g++ always
1219 dnl warns for this case with -Wuninitialized (implied by -W). We
1220 dnl don't intend to use this idiom, so any instances are bugs we'd
1221 dnl like to know about.
1223 dnl All the other options were supported by g++ 2.95.
1224 AM_CXXFLAGS="$AM_CXXFLAGS -Wall -W -Wredundant-decls -Wpointer-arith -Wcast-qual -Wcast-align -Wformat-security -fno-gnu-keywords -Wundef -Woverloaded-virtual -Wstrict-null-sentinel -Wshadow -Wstrict-overflow=1 -Wlogical-op -Wmissing-declarations -Wdouble-promotion -Winit-self"
1227 dnl -Wconversion in older GCC versions is intended to help migration
1228 dnl from K&R to ISO C, and isn't useful for us. In 4.3 it was renamed
1229 dnl to -Wtraditional-conversion and a new -Wconversion added which
1230 dnl sounds useful but is a bit buggy currently. So we should consider
1231 dnl enabling -Wconversion once it is stabilised (GCC 4.4 or ...)
1233 dnl -Wold-style-cast is interesting, but triggers for macros from
1234 dnl system headers (e.g. FD_SET). GCC 4.8 improved this by making
1235 dnl -ftrack-macro-expansion=2 the default, but we still see such
1236 dnl warnings on some platforms for some reason (e.g. Cygwin with GCC
1237 dnl 5.4.0 warns about FD_SET, and on Debian with GCC 4.9.2 we see
1238 dnl warnings from zlib.h).
1240 dnl Automatically add -Werror if maintainer mode is enabled.
1241 if test x$USE_MAINTAINER_MODE = xyes; then
1242 AM_CXXFLAGS="$AM_CXXFLAGS -Werror"
1246 dnl Intel's compiler (since __clang__ not substituted):
1248 dnl -w1 stops the avalanche of uninteresting "remark" messages.
1249 dnl -wd... disables warnings which don't have good code workarounds.
1250 AM_CXXFLAGS="$AM_CXXFLAGS -Wall -w1 -wd177,1572"
1252 dnl Automatically add -Werror if maintainer mode is enabled.
1253 if test x$USE_MAINTAINER_MODE = xyes; then
1254 AM_CXXFLAGS="$AM_CXXFLAGS -Werror"
1258 dnl clang (since __INTEL_COMPILER not substituted):
1260 dnl These options all work at least as far back as clang++ 3.0:
1261 AM_CXXFLAGS="$AM_CXXFLAGS -Wall -W -Wredundant-decls -Wpointer-arith -Wcast-qual -Wcast-align -Wformat-security -fno-gnu-keywords -Wundef -Woverloaded-virtual -Wshadow -Wstrict-overflow=1 -Wmissing-declarations -Winit-self"
1263 dnl Automatically add -Werror if maintainer mode is enabled.
1264 if test x$USE_MAINTAINER_MODE = xyes; then
1265 AM_CXXFLAGS="$AM_CXXFLAGS -Werror"
1270 if test no != "$enable_visibility"; then
1271 dnl GCC doesn't support symbol visibility on all platforms (e.g. it isn't
1272 dnl supported on mingw).
1273 AC_MSG_CHECKING([if $CXX -fvisibility=hidden works])
1274 if echo 'int bar() __attribute__((visibility("default"))); int foo() {return 42;}'|$CXX -Werror -fvisibility=hidden -c -oconftest.o -xc++ - >&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD ; then
1275 AC_MSG_RESULT([yes])
1276 AM_CXXFLAGS="$AM_CXXFLAGS -fvisibility=hidden"
1277 dash_d_visibility=-DXAPIAN_ENABLE_VISIBILITY
1279 dnl If available, enable -fvisibility-inlines-hidden too, which results
1280 dnl in inline functions in API classes being marked as hidden so that
1281 dnl they get bound at link time inside the library reducing the number
1282 dnl of relocations needed at library load time.
1283 AC_MSG_CHECKING([if $CXX -fvisibility-inlines-hidden works])
1284 if echo 'int bar() __attribute__((visibility("default"))); int foo() {return 42;}'|$CXX -Werror -fvisibility=hidden -fvisibility-inlines-hidden -c -oconftest.o -xc++ - >&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD ; then
1285 AC_MSG_RESULT([yes])
1286 AM_CXXFLAGS="$AM_CXXFLAGS -fvisibility-inlines-hidden"
1295 dnl Not GCC, nor a compiler masquerading as GCC.
1298 dnl +w turns on more warnings.
1299 dnl +wlint turns on "lint-like" warnings.
1300 dnl +W<n1>,<n2>,... suppresses warnings n1, n2, ...
1301 dnl 2340 (remark) "value copied to temporary, reference to temporary
1302 dnl use", in: throw Xapian::UnimplementedError("...");
1303 dnl 2401 "destructor for base class ... is non-virtual" (we don't need a
1304 dnl virtual destructor for intrusive_base, since we never delete
1305 dnl its subclasses by a intrusive_base *).
1306 dnl 3348 "declaration hides constant ..." which seems to misfire!
1307 dnl 4255 (remark) "padding size of struct "..." with ... bytes to
1308 dnl alignment boundary".
1309 dnl 4273 "floating-point equality and inequality comparisons may be
1310 dnl inappropriate due to roundoff common in floating-point computation"
1311 dnl No obvious workaround for when you really do want == or !=.
1312 dnl 20201 "Memory leak is detected" which triggers for "return new Foo;"!
1313 AM_CXXFLAGS="$AM_CXXFLAGS +w +wlint +W2340,2401,3348,4255,4273,20201" ;;
1315 dnl Sun's C++ compiler warns about functions failing to return a value even
1316 dnl when the function ends with a "throw" statement. That's just unhelpful
1317 dnl noise, and adding a dummy "return" after "throw" seems a worse solution
1318 dnl than simply disabling this warning - any genuinely missing return
1319 dnl statements will get reported by compilers with superior warning
1321 XAPIAN_TEST_CXXFLAGS([-erroff=voidretw], [AM_CXXFLAGS])
1326 XAPIAN_TEST_LINKER_FLAG([-Bsymbolic-functions], [symbolic_functions],
1327 [XAPIAN_LDFLAGS="$XAPIAN_LDFLAGS $flag"])
1329 FP_EXCESS_PRECISION=no
1330 AC_MSG_CHECKING([whether to use SSE instructions on x86])
1333 if test "$enable_sse" = no ; then
1335 FP_EXCESS_PRECISION=yes
1337 dnl Default to sse2.
1338 test "$enable_sse" != yes || enable_sse=sse2
1339 if test yes = "$GXX"; then
1340 AC_MSG_RESULT([yes (configure with --disable-sse to disable)])
1341 dnl We can unconditionally use -mtune=generic as it was added in GCC
1342 dnl 4.2, and supported at least as far back as clang 3.0.
1343 AM_CXXFLAGS="$AM_CXXFLAGS -mfpmath=sse -m$enable_sse -mtune=generic"
1345 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
1346 [[#ifndef __SUNPRO_CC
1347 #error Not Sun compiler
1349 [AC_MSG_RESULT([yes (configure with --disable-sse to disable)])
1350 AM_CXXFLAGS="$AM_CXXFLAGS -xarch=$enable_sse"]
1352 [AC_MSG_RESULT([don't know how to for compiler $CXX])
1353 FP_EXCESS_PRECISION=yes]
1359 AC_MSG_RESULT([non-x86 arch ($host_cpu)]) ;;
1361 AC_SUBST([FP_EXCESS_PRECISION])
1364 [/* Disable stupid MSVC warnings. */
1366 /* Passing an empty parameter to a single parameter macro. */
1367 # pragma warning(disable:4003)
1368 /* A "performance" warning for converting int to bool. */
1369 # pragma warning(disable:4800)
1373 /* Tell MSVC we want M_PI, etc defined. */
1374 # define _USE_MATH_DEFINES
1376 /* Tell MSVC we don't want max() and min() macros defined. */
1380 /* MSVC defines _WIN32 but not __WIN32__. */
1381 #if !defined __WIN32__ && defined _WIN32 && !defined _WIN64
1385 /* _FORTIFY_SOURCE is only supported by GCC >= 4.1 and glibc >= 2.3.4, but it
1386 * shouldn't cause a problem to define it where it's not supported and some
1387 * distros may have backported support, so hardcoding version checks is
1388 * counter-productive.
1390 * Check if _FORTIFY_SOURCE is already defined to allow the user to override
1391 * our choice with "./configure CPPFLAGS=-D_FORTIFY_SOURCE=0" or "...=1".
1393 #if defined __GNUC__ && !defined _FORTIFY_SOURCE
1394 # define _FORTIFY_SOURCE 2
1397 /* For compilers which support it (such as GCC, clang, Intel's C++ compiler)
1398 * we can use __builtin_expect to give the compiler hints about branch
1399 * prediction. See HACKING for how to use these.
1401 #if HAVE_DECL___BUILTIN_EXPECT
1402 /* The arguments of __builtin_expect() are both long, so use !! to ensure that
1403 * the first argument is always an integer expression, and always 0 or 1, but
1404 * still has the same truth value for the if or while it is used in.
1406 # define rare(COND) __builtin_expect(!!(COND), 0)
1407 # define usual(COND) __builtin_expect(!!(COND), 1)
1409 # define rare(COND) (COND)
1410 # define usual(COND) (COND)
1413 /* Signal we're building the library so it's OK to include headers such as
1414 * xapian/query.h directly.
1416 #define XAPIAN_LIB_BUILD 1
1418 /* With Sun CC 5.13 (Studio 12.4) on Solaris 11.2, <math.h> seems to get
1419 * implicitly included somehow before <cmath>, and compilation fails due
1420 * to 'std::exception' colliding with 'struct exception'. It's not clear
1421 * how to avoid this, so just define the same magic macro which <cmath> does
1422 * before it includes <math.h>.
1425 # define __MATHERR_RENAME_EXCEPTION
1429 AC_SUBST([AM_CXXFLAGS])
1431 dnl Restore CXXFLAGS to those the user specified or autoconf defaulted to.
1432 CXXFLAGS=$save_CXXFLAGS
1434 dnl Required for auto regeneration to work in a combined maintainer-mode tree.
1435 : ${AUTOM4TE=autom4te}
1436 AC_SUBST([AUTOM4TE])
1438 dnl Libtool sets this (to yes|no|unknown) and we use it in xapian-config.
1439 AC_SUBST([link_all_deplibs_CXX])
1441 dnl Shared library extension.
1443 eval "SHLIBEXT=$shrext_cmds"
1444 AC_SUBST([SHLIBEXT])
1446 dnl We want to be able to use GNU make % pattern rules in maintainer targets
1447 dnl but automake warns these aren't portable, so we substitute the % to avoid
1452 dnl Split up the version number into "MAJOR.MINOR.REVISION".
1453 MAJOR_VERSION=`echo "$VERSION"|sed 's/\..*//'`
1454 [MINOR_VERSION=`echo "$VERSION"|sed 's/[^.]*\.//;s/\..*//'`]
1455 [REVISION=`echo "$VERSION"|sed 's/.*\.//;s/_.*$//'`]
1457 dnl **************************
1458 dnl * Build the output files *
1459 dnl **************************
1465 docs/doxygen_api.conf
1466 docs/doxygen_source.conf
1468 cmake/xapian-config.cmake
1469 cmake/xapian-config-version.cmake
1470 pkgconfig/xapian-core"$LIBRARY_VERSION_SUFFIX".pc:pkgconfig/xapian-core.pc.in
1472 AC_CONFIG_FILES([tests/runtest], [chmod +x tests/runtest])
1473 AC_CONFIG_FILES([tests/runsrv], [chmod +x tests/runsrv])
1474 AC_CONFIG_FILES([tests/submitperftest], [chmod +x tests/submitperftest])
1475 AC_CONFIG_FILES([tests/perftest/get_machine_info], [chmod +x tests/perftest/get_machine_info])
1476 AC_CONFIG_FILES([xapian-config], [chmod +x xapian-config])
1477 AC_CONFIG_FILES([makemanpage], [chmod +x makemanpage])
1480 dnl There are no files generated by AC_OUTPUT in the following directories
1481 dnl and we need to ensure they exist so that the rest of configure or make
1482 dnl won't fail because they don't exist when srcdir != builddir.
1483 if test yes = "$vpath_build" ; then
1484 for dir in include/xapian languages queryparser ; do
1485 AS_MKDIR_P(["$dir"])
1489 dnl Generate include/xapian/version.h:
1491 dnl MAIN_VERSION is VERSION without any _git123 suffix.
1492 MAIN_VERSION="$MAJOR_VERSION.$MINOR_VERSION.$REVISION"
1494 for backend in GLASS INMEMORY REMOTE ; do
1495 val=`eval echo "\\\$BUILD_BACKEND_${backend}_TRUE"`
1496 if test -z "$val" ; then
1497 cxxcpp_flags="$cxxcpp_flags -DXAPIAN_HAS_${backend}_BACKEND"
1501 if test yes = "$enable_64bit_docid" ; then
1502 cxxcpp_flags="$cxxcpp_flags -DXAPIAN_DOCID_BASE_TYPE="`echo "$INT64_T"|sed 's/ /____/g'`
1504 cxxcpp_flags="$cxxcpp_flags -DXAPIAN_DOCID_BASE_TYPE="`echo "$INT32_T"|sed 's/ /____/g'`
1507 if test yes = "$enable_64bit_termcount" ; then
1508 cxxcpp_flags="$cxxcpp_flags -DXAPIAN_TERMCOUNT_BASE_TYPE="`echo "$INT64_T"|sed 's/ /____/g'`
1510 cxxcpp_flags="$cxxcpp_flags -DXAPIAN_TERMCOUNT_BASE_TYPE="`echo "$INT32_T"|sed 's/ /____/g'`
1513 dnl Always ought to be 64 bit.
1514 cxxcpp_flags="$cxxcpp_flags -DXAPIAN_TOTALLENGTH_TYPE="`echo "unsigned $INT64_T"|sed 's/ /____/g'`
1516 dnl Make revision numbers in the API 64 bit for future-proofing.
1517 cxxcpp_flags="$cxxcpp_flags -DXAPIAN_REVISION_TYPE="`echo "unsigned $INT64_T"|sed 's/ /____/g'`
1519 dnl For GCC (and compilers which pretend to be GCC) and MSVC, we create some
1520 dnl ABI checks in the generated version.h, and $CXXFLAGS may contain options
1521 dnl which affect the ABI (e.g. -fabi-version for GCC) so we want to use these
1522 dnl options when generating version.h. For these compilers, CXXCPP="$CXX -E"
1523 dnl so it should understand all compiler options.
1525 dnl For other compilers, we only pass $CPPFLAGS to $CXXCPP in case it's an
1526 dnl external cpp which doesn't understand flags which might be in $CXXFLAGS.
1527 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [[#ifndef __GNUC__
1533 [cxxcpp_flags="$cxxcpp_flags $CPPFLAGS $CXXFLAGS"],
1534 [cxxcpp_flags="$cxxcpp_flags $CPPFLAGS"])
1535 rm -f include/xapian/version.h.tmp
1536 dnl "\r" in sed is a GNUism, but we only need to remove it on MS Windows
1537 dnl where we'll always have GNU sed, and other sed's will just interpret
1538 dnl it as "r" (Solaris sed) or maybe literal "\r" which won't match.
1540 dnl Use @@ around $MAIN_VERSION so we get " in the final output.
1541 $CXXCPP $cxxcpp_flags\
1542 -DSTRING_VERSION="\"@@$MAIN_VERSION@@\""\
1543 -DMAJOR_VERSION="\"$MAJOR_VERSION\""\
1544 -DMINOR_VERSION="\"$MINOR_VERSION\""\
1545 -DREVISION="\"$REVISION\""\
1547 $srcdir/include/xapian/version_h.cc|\
1548 ${SED-sed} '/"/!d;s/^ *//;/^#/d;s/ *$//;s/" *,//;s/"//g;s/@@/"/g;s/ */ /g;s/ *,\r$//;s/ *,$//;s/____/ /g;s/\\\\$/\\/'\
1549 > include/xapian/version.h.tmp
1550 dnl Only update the file if it has changed, so we don't alter the timestamp
1551 dnl and cause lots of rebuilding needlessly. However, the build system
1552 dnl needs a timestamp to know when to regenerate version.h because version_h.cc
1553 dnl has changed so we use a separate timestamp file.
1554 touch include/xapian/version.h.timestamp
1555 if cmp include/xapian/version.h.tmp include/xapian/version.h >/dev/null 2>&1
1557 rm include/xapian/version.h.tmp
1559 mv include/xapian/version.h.tmp include/xapian/version.h