| blob | 78345ebb60240e6642f319467defe3e07d4aa263 |
1 # -*- Autoconf -*-
2 # Process this file with autoconf to produce a configure script.
4 AC_PREREQ(2.59)
5 AC_INIT([git], [@@GIT_VERSION@@], [git@vger.kernel.org])
7 AC_CONFIG_SRCDIR([git.c])
9 config_file=config.mak.autogen
10 config_append=config.mak.append
11 config_in=config.mak.in
13 echo "# ${config_append}. Generated by configure." > "${config_append}"
16 ## Definitions of macros
17 # GIT_CONF_APPEND_LINE(LINE)
18 # --------------------------
19 # Append LINE to file ${config_append}
20 AC_DEFUN([GIT_CONF_APPEND_LINE],
21 [echo "$1" >> "${config_append}"])# GIT_CONF_APPEND_LINE
22 #
23 # GIT_ARG_SET_PATH(PROGRAM)
24 # -------------------------
25 # Provide --with-PROGRAM=PATH option to set PATH to PROGRAM
26 AC_DEFUN([GIT_ARG_SET_PATH],
27 [AC_ARG_WITH([$1],
28 [AS_HELP_STRING([--with-$1=PATH],
29 [provide PATH to $1])],
30 [GIT_CONF_APPEND_PATH($1)],[])
31 ])# GIT_ARG_SET_PATH
32 #
33 # GIT_CONF_APPEND_PATH(PROGRAM)
34 # ------------------------------
35 # Parse --with-PROGRAM=PATH option to set PROGRAM_PATH=PATH
36 # Used by GIT_ARG_SET_PATH(PROGRAM)
37 AC_DEFUN([GIT_CONF_APPEND_PATH],
38 [PROGRAM=m4_toupper($1); \
39 if test "$withval" = "no"; then \
40 AC_MSG_ERROR([You cannot use git without $1]); \
41 else \
42 if test "$withval" = "yes"; then \
43 AC_MSG_WARN([You should provide path for --with-$1=PATH]); \
44 else \
45 m4_toupper($1)_PATH=$withval; \
46 AC_MSG_NOTICE([Setting m4_toupper($1)_PATH to $withval]); \
47 GIT_CONF_APPEND_LINE(${PROGRAM}_PATH=$withval); \
48 fi; \
49 fi; \
50 ]) # GIT_CONF_APPEND_PATH
51 #
52 # GIT_PARSE_WITH(PACKAGE)
53 # -----------------------
54 # For use in AC_ARG_WITH action-if-found, for packages default ON.
55 # * Set NO_PACKAGE=YesPlease for --without-PACKAGE
56 # * Set PACKAGEDIR=PATH for --with-PACKAGE=PATH
57 # * Unset NO_PACKAGE for --with-PACKAGE without ARG
58 AC_DEFUN([GIT_PARSE_WITH],
59 [PACKAGE=m4_toupper($1); \
60 if test "$withval" = "no"; then \
61 m4_toupper(NO_$1)=YesPlease; \
62 elif test "$withval" = "yes"; then \
63 m4_toupper(NO_$1)=; \
64 else \
65 m4_toupper(NO_$1)=; \
66 m4_toupper($1)DIR=$withval; \
67 AC_MSG_NOTICE([Setting m4_toupper($1)DIR to $withval]); \
68 GIT_CONF_APPEND_LINE(${PACKAGE}DIR=$withval); \
69 fi \
70 ])# GIT_PARSE_WITH
71 #
72 # GIT_PARSE_WITH_SET_MAKE_VAR(WITHNAME, VAR, HELP_TEXT)
73 # ---------------------
74 # Set VAR to the value specied by --with-WITHNAME.
75 # No verification of arguments is performed, but warnings are issued
76 # if either 'yes' or 'no' is specified.
77 # HELP_TEXT is presented when --help is called.
78 # This is a direct way to allow setting variables in the Makefile.
79 AC_DEFUN([GIT_PARSE_WITH_SET_MAKE_VAR],
80 [AC_ARG_WITH([$1],
81 [AS_HELP_STRING([--with-$1=VALUE], $3)],
82 if test -n "$withval"; then \
83 if test "$withval" = "yes" -o "$withval" = "no"; then \
84 AC_MSG_WARN([You likely do not want either 'yes' or 'no' as]
85 [a value for $1 ($2). Maybe you do...?]); \
86 fi; \
87 \
88 AC_MSG_NOTICE([Setting $2 to $withval]); \
89 GIT_CONF_APPEND_LINE($2=$withval); \
90 fi)])# GIT_PARSE_WITH_SET_MAKE_VAR
92 dnl
93 dnl GIT_CHECK_FUNC(FUNCTION, IFTRUE, IFFALSE)
94 dnl -----------------------------------------
95 dnl Similar to AC_CHECK_FUNC, but on systems that do not generate
96 dnl warnings for missing prototypes (e.g. FreeBSD when compiling without
97 dnl -Wall), it does not work. By looking for function definition in
98 dnl libraries, this problem can be worked around.
99 AC_DEFUN([GIT_CHECK_FUNC],[AC_CHECK_FUNC([$1],[
100 AC_SEARCH_LIBS([$1],,
101 [$2],[$3])
102 ],[$3])])
104 dnl
105 dnl GIT_STASH_FLAGS(BASEPATH_VAR)
106 dnl -----------------------------
107 dnl Allow for easy stashing of LDFLAGS and CPPFLAGS before running
108 dnl tests that may want to take user settings into account.
109 AC_DEFUN([GIT_STASH_FLAGS],[
110 if test -n "$1"; then
111 old_CPPFLAGS="$CPPFLAGS"
112 old_LDFLAGS="$LDFLAGS"
113 CPPFLAGS="-I$1/include $CPPFLAGS"
114 LDFLAGS="-L$1/$lib $LDFLAGS"
115 fi
116 ])
118 dnl
119 dnl GIT_UNSTASH_FLAGS(BASEPATH_VAR)
120 dnl -----------------------------
121 dnl Restore the stashed *FLAGS values.
122 AC_DEFUN([GIT_UNSTASH_FLAGS],[
123 if test -n "$1"; then
124 CPPFLAGS="$old_CPPFLAGS"
125 LDFLAGS="$old_LDFLAGS"
126 fi
127 ])
129 ## Site configuration related to programs (before tests)
130 ## --with-PACKAGE[=ARG] and --without-PACKAGE
131 #
132 # Set lib to alternative name of lib directory (e.g. lib64)
133 AC_ARG_WITH([lib],
134 [AS_HELP_STRING([--with-lib=ARG],
135 [ARG specifies alternative name for lib directory])],
136 [if test "$withval" = "no" || test "$withval" = "yes"; then \
137 AC_MSG_WARN([You should provide name for --with-lib=ARG]); \
138 else \
139 lib=$withval; \
140 AC_MSG_NOTICE([Setting lib to '$lib']); \
141 GIT_CONF_APPEND_LINE(lib=$withval); \
142 fi; \
143 ],[])
145 if test -z "$lib"; then
146 AC_MSG_NOTICE([Setting lib to 'lib' (the default)])
147 lib=lib
148 fi
150 AC_ARG_ENABLE([pthreads],
151 [AS_HELP_STRING([--enable-pthreads=FLAGS],
152 [FLAGS is the value to pass to the compiler to enable POSIX Threads.]
153 [The default if FLAGS is not specified is to try first -pthread]
154 [and then -lpthread.]
155 [--without-pthreads will disable threading.])],
156 [
157 if test "x$enableval" = "xyes"; then
158 AC_MSG_NOTICE([Will try -pthread then -lpthread to enable POSIX Threads])
159 elif test "x$enableval" != "xno"; then
160 PTHREAD_CFLAGS=$enableval
161 AC_MSG_NOTICE([Setting '$PTHREAD_CFLAGS' as the FLAGS to enable POSIX Threads])
162 else
163 AC_MSG_NOTICE([POSIX Threads will be disabled.])
164 NO_PTHREADS=YesPlease
165 USER_NOPTHREAD=1
166 fi],
167 [
168 AC_MSG_NOTICE([Will try -pthread then -lpthread to enable POSIX Threads.])
169 ])
171 ## Site configuration (override autodetection)
172 ## --with-PACKAGE[=ARG] and --without-PACKAGE
173 AC_MSG_NOTICE([CHECKS for site configuration])
174 #
175 # Define NO_SVN_TESTS if you want to skip time-consuming SVN interoperability
176 # tests. These tests take up a significant amount of the total test time
177 # but are not needed unless you plan to talk to SVN repos.
178 #
179 # Define PPC_SHA1 environment variable when running make to make use of
180 # a bundled SHA1 routine optimized for PowerPC.
181 #
182 # Define NO_OPENSSL environment variable if you do not have OpenSSL.
183 # This also implies BLK_SHA1.
184 #
185 # Define OPENSSLDIR=/foo/bar if your openssl header and library files are in
186 # /foo/bar/include and /foo/bar/lib directories.
187 AC_ARG_WITH(openssl,
188 AS_HELP_STRING([--with-openssl],[use OpenSSL library (default is YES)])
189 AS_HELP_STRING([], [ARG can be prefix for openssl library and headers]),\
190 GIT_PARSE_WITH(openssl))
191 #
192 # Define NO_CURL if you do not have curl installed. git-http-pull and
193 # git-http-push are not built, and you cannot use http:// and https://
194 # transports.
195 #
196 # Define CURLDIR=/foo/bar if your curl header and library files are in
197 # /foo/bar/include and /foo/bar/lib directories.
198 AC_ARG_WITH(curl,
199 AS_HELP_STRING([--with-curl],[support http(s):// transports (default is YES)])
200 AS_HELP_STRING([], [ARG can be also prefix for curl library and headers]),
201 GIT_PARSE_WITH(curl))
202 #
203 # Define NO_EXPAT if you do not have expat installed. git-http-push is
204 # not built, and you cannot push using http:// and https:// transports.
205 #
206 # Define EXPATDIR=/foo/bar if your expat header and library files are in
207 # /foo/bar/include and /foo/bar/lib directories.
208 AC_ARG_WITH(expat,
209 AS_HELP_STRING([--with-expat],
210 [support git-push using http:// and https:// transports via WebDAV (default is YES)])
211 AS_HELP_STRING([], [ARG can be also prefix for expat library and headers]),
212 GIT_PARSE_WITH(expat))
213 #
214 # Define NO_FINK if you are building on Darwin/Mac OS X, have Fink
215 # installed in /sw, but don't want GIT to link against any libraries
216 # installed there. If defined you may specify your own (or Fink's)
217 # include directories and library directories by defining CFLAGS
218 # and LDFLAGS appropriately.
219 #
220 # Define NO_DARWIN_PORTS if you are building on Darwin/Mac OS X,
221 # have DarwinPorts installed in /opt/local, but don't want GIT to
222 # link against any libraries installed there. If defined you may
223 # specify your own (or DarwinPort's) include directories and
224 # library directories by defining CFLAGS and LDFLAGS appropriately.
225 #
226 # Define NO_MMAP if you want to avoid mmap.
227 #
228 # Define NO_ICONV if your libc does not properly support iconv.
229 AC_ARG_WITH(iconv,
230 AS_HELP_STRING([--without-iconv],
231 [if your architecture doesn't properly support iconv])
232 AS_HELP_STRING([--with-iconv=PATH],
233 [PATH is prefix for libiconv library and headers])
234 AS_HELP_STRING([],
235 [used only if you need linking with libiconv]),
236 GIT_PARSE_WITH(iconv))
238 ## --enable-FEATURE[=ARG] and --disable-FEATURE
239 #
240 # Define USE_NSEC below if you want git to care about sub-second file mtimes
241 # and ctimes. Note that you need recent glibc (at least 2.2.4) for this, and
242 # it will BREAK YOUR LOCAL DIFFS! show-diff and anything using it will likely
243 # randomly break unless your underlying filesystem supports those sub-second
244 # times (my ext3 doesn't).
245 #
246 # Define USE_STDEV below if you want git to care about the underlying device
247 # change being considered an inode change from the update-index perspective.
249 #
250 # Allow user to set ETC_GITCONFIG variable
251 GIT_PARSE_WITH_SET_MAKE_VAR(gitconfig, ETC_GITCONFIG,
252 Use VALUE instead of /etc/gitconfig as the
253 global git configuration file.
254 If VALUE is not fully qualified it will be interpretted
255 as a path relative to the computed prefix at runtime.)
257 #
258 # Allow user to set the default pager
259 GIT_PARSE_WITH_SET_MAKE_VAR(pager, DEFAULT_PAGER,
260 Use VALUE as the fall-back pager instead of 'less'.
261 This is used by things like 'git log' when the user
262 does not specify a pager to use through alternate
263 methods. eg: /usr/bin/pager)
264 #
265 # Allow user to set the default editor
266 GIT_PARSE_WITH_SET_MAKE_VAR(editor, DEFAULT_EDITOR,
267 Use VALUE as the fall-back editor instead of 'vi'.
268 This is used by things like 'git commit' when the user
269 does not specify a preferred editor through other
270 methods. eg: /usr/bin/editor)
272 #
273 # Define SHELL_PATH to provide path to shell.
274 GIT_ARG_SET_PATH(shell)
275 #
276 # Define PERL_PATH to provide path to Perl.
277 GIT_ARG_SET_PATH(perl)
278 #
279 # Define PYTHON_PATH to provide path to Python.
280 GIT_ARG_SET_PATH(python)
281 #
282 # Define ZLIB_PATH to provide path to zlib.
283 GIT_ARG_SET_PATH(zlib)
284 #
285 # Declare the with-tcltk/without-tcltk options.
286 AC_ARG_WITH(tcltk,
287 AS_HELP_STRING([--with-tcltk],[use Tcl/Tk GUI (default is YES)])
288 AS_HELP_STRING([],[ARG is the full path to the Tcl/Tk interpreter.])
289 AS_HELP_STRING([],[Bare --with-tcltk will make the GUI part only if])
290 AS_HELP_STRING([],[Tcl/Tk interpreter will be found in a system.]),\
291 GIT_PARSE_WITH(tcltk))
292 #
295 ## Checks for programs.
296 AC_MSG_NOTICE([CHECKS for programs])
297 #
298 AC_PROG_CC([cc gcc])
299 # which switch to pass runtime path to dynamic libraries to the linker
300 AC_CACHE_CHECK([if linker supports -R], git_cv_ld_dashr, [
301 SAVE_LDFLAGS="${LDFLAGS}"
302 LDFLAGS="${SAVE_LDFLAGS} -R /"
303 AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [git_cv_ld_dashr=yes], [git_cv_ld_dashr=no])
304 LDFLAGS="${SAVE_LDFLAGS}"
305 ])
306 if test "$git_cv_ld_dashr" = "yes"; then
307 AC_SUBST(CC_LD_DYNPATH, [-R])
308 else
309 AC_CACHE_CHECK([if linker supports -Wl,-rpath,], git_cv_ld_wl_rpath, [
310 SAVE_LDFLAGS="${LDFLAGS}"
311 LDFLAGS="${SAVE_LDFLAGS} -Wl,-rpath,/"
312 AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [git_cv_ld_wl_rpath=yes], [git_cv_ld_wl_rpath=no])
313 LDFLAGS="${SAVE_LDFLAGS}"
314 ])
315 if test "$git_cv_ld_wl_rpath" = "yes"; then
316 AC_SUBST(CC_LD_DYNPATH, [-Wl,-rpath,])
317 else
318 AC_CACHE_CHECK([if linker supports -rpath], git_cv_ld_rpath, [
319 SAVE_LDFLAGS="${LDFLAGS}"
320 LDFLAGS="${SAVE_LDFLAGS} -rpath /"
321 AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [git_cv_ld_rpath=yes], [git_cv_ld_rpath=no])
322 LDFLAGS="${SAVE_LDFLAGS}"
323 ])
324 if test "$git_cv_ld_rpath" = "yes"; then
325 AC_SUBST(CC_LD_DYNPATH, [-rpath])
326 else
327 AC_MSG_WARN([linker does not support runtime path to dynamic libraries])
328 fi
329 fi
330 fi
331 #AC_PROG_INSTALL # needs install-sh or install.sh in sources
332 AC_CHECK_TOOLS(AR, [gar ar], :)
333 AC_CHECK_PROGS(TAR, [gtar tar])
334 # TCLTK_PATH will be set to some value if we want Tcl/Tk
335 # or will be empty otherwise.
336 if test -z "$NO_TCLTK"; then
337 if test "$with_tcltk" = ""; then
338 # No Tcl/Tk switches given. Do not check for Tcl/Tk, use bare 'wish'.
339 TCLTK_PATH=wish
340 AC_SUBST(TCLTK_PATH)
341 elif test "$with_tcltk" = "yes"; then
342 # Tcl/Tk check requested.
343 AC_CHECK_PROGS(TCLTK_PATH, [wish], )
344 else
345 AC_MSG_RESULT([Using Tcl/Tk interpreter $with_tcltk])
346 TCLTK_PATH="$with_tcltk"
347 AC_SUBST(TCLTK_PATH)
348 fi
349 fi
350 AC_CHECK_PROGS(ASCIIDOC, [asciidoc])
351 if test -n "$ASCIIDOC"; then
352 AC_MSG_CHECKING([for asciidoc version])
353 asciidoc_version=`$ASCIIDOC --version 2>/dev/null`
354 case "${asciidoc_version}" in
355 asciidoc' '8*)
356 ASCIIDOC8=YesPlease
357 AC_MSG_RESULT([${asciidoc_version} > 7])
358 ;;
359 asciidoc' '7*)
360 ASCIIDOC8=
361 AC_MSG_RESULT([${asciidoc_version}])
362 ;;
363 *)
364 ASCIIDOC8=
365 AC_MSG_RESULT([${asciidoc_version} (unknown)])
366 ;;
367 esac
368 fi
369 AC_SUBST(ASCIIDOC8)
372 ## Checks for libraries.
373 AC_MSG_NOTICE([CHECKS for libraries])
374 #
375 # Define NO_OPENSSL environment variable if you do not have OpenSSL.
376 # Define NEEDS_SSL_WITH_CRYPTO if you need -lcrypto with -lssl (Darwin).
378 GIT_STASH_FLAGS($OPENSSLDIR)
380 AC_CHECK_LIB([crypto], [SHA1_Init],
381 [NEEDS_SSL_WITH_CRYPTO=],
382 [AC_CHECK_LIB([ssl], [SHA1_Init],
383 [NEEDS_SSL_WITH_CRYPTO=YesPlease],
384 [NEEDS_SSL_WITH_CRYPTO= NO_OPENSSL=YesPlease])])
386 GIT_UNSTASH_FLAGS($OPENSSLDIR)
388 AC_SUBST(NEEDS_SSL_WITH_CRYPTO)
389 AC_SUBST(NO_OPENSSL)
391 #
392 # Define NO_CURL if you do not have libcurl installed. git-http-pull and
393 # git-http-push are not built, and you cannot use http:// and https://
394 # transports.
396 GIT_STASH_FLAGS($CURLDIR)
398 AC_CHECK_LIB([curl], [curl_global_init],
399 [NO_CURL=],
400 [NO_CURL=YesPlease])
402 GIT_UNSTASH_FLAGS($CURLDIR)
404 AC_SUBST(NO_CURL)
406 #
407 # Define NO_EXPAT if you do not have expat installed. git-http-push is
408 # not built, and you cannot push using http:// and https:// transports.
410 GIT_STASH_FLAGS($EXPATDIR)
412 AC_CHECK_LIB([expat], [XML_ParserCreate],
413 [NO_EXPAT=],
414 [NO_EXPAT=YesPlease])
416 GIT_UNSTASH_FLAGS($EXPATDIR)
418 AC_SUBST(NO_EXPAT)
420 #
421 # Define NEEDS_LIBICONV if linking with libc is not enough (Darwin and
422 # some Solaris installations).
423 # Define NO_ICONV if neither libc nor libiconv support iconv.
425 if test -z "$NO_ICONV"; then
427 GIT_STASH_FLAGS($ICONVDIR)
429 AC_DEFUN([ICONVTEST_SRC], [
430 #include <iconv.h>
432 int main(void)
433 {
434 iconv_open("", "");
435 return 0;
436 }
437 ])
439 if test -n "$ICONVDIR"; then
440 lib_order="-liconv -lc"
441 else
442 lib_order="-lc -liconv"
443 fi
445 NO_ICONV=YesPlease
447 for l in $lib_order; do
448 if test "$l" = "-liconv"; then
449 NEEDS_LIBICONV=YesPlease
450 else
451 NEEDS_LIBICONV=
452 fi
454 old_LIBS="$LIBS"
455 LIBS="$LIBS $l"
456 AC_MSG_CHECKING([for iconv in $l])
457 AC_LINK_IFELSE(ICONVTEST_SRC,
458 [AC_MSG_RESULT([yes])
459 NO_ICONV=
460 break],
461 [AC_MSG_RESULT([no])])
462 LIBS="$old_LIBS"
463 done
465 #in case of break
466 LIBS="$old_LIBS"
468 GIT_UNSTASH_FLAGS($ICONVDIR)
470 AC_SUBST(NEEDS_LIBICONV)
471 AC_SUBST(NO_ICONV)
473 if test -n "$NO_ICONV"; then
474 NEEDS_LIBICONV=
475 fi
477 fi
479 #
480 # Define NO_DEFLATE_BOUND if deflateBound is missing from zlib.
482 GIT_STASH_FLAGS($ZLIB_PATH)
484 AC_DEFUN([ZLIBTEST_SRC], [
485 #include <zlib.h>
487 int main(void)
488 {
489 deflateBound(0, 0);
490 return 0;
491 }
492 ])
493 AC_MSG_CHECKING([for deflateBound in -lz])
494 old_LIBS="$LIBS"
495 LIBS="$LIBS -lz"
496 AC_LINK_IFELSE(ZLIBTEST_SRC,
497 [AC_MSG_RESULT([yes])],
498 [AC_MSG_RESULT([no])
499 NO_DEFLATE_BOUND=yes])
500 LIBS="$old_LIBS"
502 GIT_UNSTASH_FLAGS($ZLIB_PATH)
504 AC_SUBST(NO_DEFLATE_BOUND)
506 #
507 # Define NEEDS_SOCKET if linking with libc is not enough (SunOS,
508 # Patrick Mauritz).
509 AC_CHECK_LIB([c], [socket],
510 [NEEDS_SOCKET=],
511 [NEEDS_SOCKET=YesPlease])
512 AC_SUBST(NEEDS_SOCKET)
513 test -n "$NEEDS_SOCKET" && LIBS="$LIBS -lsocket"
515 #
516 # Define NEEDS_RESOLV if linking with -lnsl and/or -lsocket is not enough.
517 # Notably on Solaris hstrerror resides in libresolv and on Solaris 7
518 # inet_ntop and inet_pton additionally reside there.
519 AC_CHECK_LIB([c], [hstrerror],
520 [NEEDS_RESOLV=],
521 [NEEDS_RESOLV=YesPlease])
522 AC_SUBST(NEEDS_RESOLV)
523 test -n "$NEEDS_RESOLV" && LIBS="$LIBS -lresolv"
525 AC_CHECK_LIB([c], [basename],
526 [NEEDS_LIBGEN=],
527 [NEEDS_LIBGEN=YesPlease])
528 AC_SUBST(NEEDS_LIBGEN)
529 test -n "$NEEDS_LIBGEN" && LIBS="$LIBS -lgen"
531 ## Checks for header files.
532 AC_MSG_NOTICE([CHECKS for header files])
533 #
534 # Define NO_SYS_SELECT_H if you don't have sys/select.h.
535 AC_CHECK_HEADER([sys/select.h],
536 [NO_SYS_SELECT_H=],
537 [NO_SYS_SELECT_H=UnfortunatelyYes])
538 AC_SUBST(NO_SYS_SELECT_H)
539 #
540 # Define OLD_ICONV if your library has an old iconv(), where the second
541 # (input buffer pointer) parameter is declared with type (const char **).
542 AC_DEFUN([OLDICONVTEST_SRC], [[
543 #include <iconv.h>
545 extern size_t iconv(iconv_t cd,
546 char **inbuf, size_t *inbytesleft,
547 char **outbuf, size_t *outbytesleft);
549 int main(void)
550 {
551 return 0;
552 }
553 ]])
555 GIT_STASH_FLAGS($ICONVDIR)
557 AC_MSG_CHECKING([for old iconv()])
558 AC_COMPILE_IFELSE(OLDICONVTEST_SRC,
559 [AC_MSG_RESULT([no])],
560 [AC_MSG_RESULT([yes])
561 OLD_ICONV=UnfortunatelyYes])
563 GIT_UNSTASH_FLAGS($ICONVDIR)
565 AC_SUBST(OLD_ICONV)
567 ## Checks for typedefs, structures, and compiler characteristics.
568 AC_MSG_NOTICE([CHECKS for typedefs, structures, and compiler characteristics])
569 #
570 # Define NO_D_INO_IN_DIRENT if you don't have d_ino in your struct dirent.
571 AC_CHECK_MEMBER(struct dirent.d_ino,
572 [NO_D_INO_IN_DIRENT=],
573 [NO_D_INO_IN_DIRENT=YesPlease],
574 [#include <dirent.h>])
575 AC_SUBST(NO_D_INO_IN_DIRENT)
576 #
577 # Define NO_D_TYPE_IN_DIRENT if your platform defines DT_UNKNOWN but lacks
578 # d_type in struct dirent (latest Cygwin -- will be fixed soonish).
579 AC_CHECK_MEMBER(struct dirent.d_type,
580 [NO_D_TYPE_IN_DIRENT=],
581 [NO_D_TYPE_IN_DIRENT=YesPlease],
582 [#include <dirent.h>])
583 AC_SUBST(NO_D_TYPE_IN_DIRENT)
584 #
585 # Define NO_SOCKADDR_STORAGE if your platform does not have struct
586 # sockaddr_storage.
587 AC_CHECK_TYPE(struct sockaddr_storage,
588 [NO_SOCKADDR_STORAGE=],
589 [NO_SOCKADDR_STORAGE=YesPlease],[
590 #include <sys/types.h>
591 #include <sys/socket.h>
592 ])
593 AC_SUBST(NO_SOCKADDR_STORAGE)
594 #
595 # Define NO_IPV6 if you lack IPv6 support and getaddrinfo().
596 AC_CHECK_TYPE([struct addrinfo],[
597 GIT_CHECK_FUNC([getaddrinfo],
598 [NO_IPV6=],
599 [NO_IPV6=YesPlease])
600 ],[NO_IPV6=YesPlease],[
601 #include <sys/types.h>
602 #include <sys/socket.h>
603 #include <netdb.h>
604 ])
605 AC_SUBST(NO_IPV6)
606 #
607 # Define NO_C99_FORMAT if your formatted IO functions (printf/scanf et.al.)
608 # do not support the 'size specifiers' introduced by C99, namely ll, hh,
609 # j, z, t. (representing long long int, char, intmax_t, size_t, ptrdiff_t).
610 # some C compilers supported these specifiers prior to C99 as an extension.
611 AC_CACHE_CHECK([whether formatted IO functions support C99 size specifiers],
612 [ac_cv_c_c99_format],
613 [# Actually git uses only %z (%zu) in alloc.c, and %t (%td) in mktag.c
614 AC_RUN_IFELSE(
615 [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
616 [[char buf[64];
617 if (sprintf(buf, "%lld%hhd%jd%zd%td", (long long int)1, (char)2, (intmax_t)3, (size_t)4, (ptrdiff_t)5) != 5)
618 return 1;
619 else if (strcmp(buf, "12345"))
620 return 2;]])],
621 [ac_cv_c_c99_format=yes],
622 [ac_cv_c_c99_format=no])
623 ])
624 if test $ac_cv_c_c99_format = no; then
625 NO_C99_FORMAT=YesPlease
626 else
627 NO_C99_FORMAT=
628 fi
629 AC_SUBST(NO_C99_FORMAT)
630 #
631 # Define FREAD_READS_DIRECTORIES if your are on a system which succeeds
632 # when attempting to read from an fopen'ed directory.
633 AC_CACHE_CHECK([whether system succeeds to read fopen'ed directory],
634 [ac_cv_fread_reads_directories],
635 [
636 AC_RUN_IFELSE(
637 [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
638 [[char c;
639 FILE *f = fopen(".", "r");
640 return f && fread(&c, 1, 1, f)]])],
641 [ac_cv_fread_reads_directories=no],
642 [ac_cv_fread_reads_directories=yes])
643 ])
644 if test $ac_cv_fread_reads_directories = yes; then
645 FREAD_READS_DIRECTORIES=UnfortunatelyYes
646 else
647 FREAD_READS_DIRECTORIES=
648 fi
649 AC_SUBST(FREAD_READS_DIRECTORIES)
650 #
651 # Define SNPRINTF_RETURNS_BOGUS if your are on a system which snprintf()
652 # or vsnprintf() return -1 instead of number of characters which would
653 # have been written to the final string if enough space had been available.
654 AC_CACHE_CHECK([whether snprintf() and/or vsnprintf() return bogus value],
655 [ac_cv_snprintf_returns_bogus],
656 [
657 AC_RUN_IFELSE(
658 [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT
659 #include "stdarg.h"
661 int test_vsnprintf(char *str, size_t maxsize, const char *format, ...)
662 {
663 int ret;
664 va_list ap;
665 va_start(ap, format);
666 ret = vsnprintf(str, maxsize, format, ap);
667 va_end(ap);
668 return ret;
669 }],
670 [[char buf[6];
671 if (test_vsnprintf(buf, 3, "%s", "12345") != 5
672 || strcmp(buf, "12")) return 1;
673 if (snprintf(buf, 3, "%s", "12345") != 5
674 || strcmp(buf, "12")) return 1]])],
675 [ac_cv_snprintf_returns_bogus=no],
676 [ac_cv_snprintf_returns_bogus=yes])
677 ])
678 if test $ac_cv_snprintf_returns_bogus = yes; then
679 SNPRINTF_RETURNS_BOGUS=UnfortunatelyYes
680 else
681 SNPRINTF_RETURNS_BOGUS=
682 fi
683 AC_SUBST(SNPRINTF_RETURNS_BOGUS)
686 ## Checks for library functions.
687 ## (in default C library and libraries checked by AC_CHECK_LIB)
688 AC_MSG_NOTICE([CHECKS for library functions])
689 #
690 # Define NO_LIBGEN_H if you don't have libgen.h.
691 AC_CHECK_HEADER([libgen.h],
692 [NO_LIBGEN_H=],
693 [NO_LIBGEN_H=YesPlease])
694 AC_SUBST(NO_LIBGEN_H)
695 #
696 # Define NO_STRCASESTR if you don't have strcasestr.
697 GIT_CHECK_FUNC(strcasestr,
698 [NO_STRCASESTR=],
699 [NO_STRCASESTR=YesPlease])
700 AC_SUBST(NO_STRCASESTR)
701 #
702 # Define NO_MEMMEM if you don't have memmem.
703 GIT_CHECK_FUNC(memmem,
704 [NO_MEMMEM=],
705 [NO_MEMMEM=YesPlease])
706 AC_SUBST(NO_MEMMEM)
707 #
708 # Define NO_STRLCPY if you don't have strlcpy.
709 GIT_CHECK_FUNC(strlcpy,
710 [NO_STRLCPY=],
711 [NO_STRLCPY=YesPlease])
712 AC_SUBST(NO_STRLCPY)
713 #
714 # Define NO_UINTMAX_T if your platform does not have uintmax_t
715 AC_CHECK_TYPE(uintmax_t,
716 [NO_UINTMAX_T=],
717 [NO_UINTMAX_T=YesPlease],[
718 #include <inttypes.h>
719 ])
720 AC_SUBST(NO_UINTMAX_T)
721 #
722 # Define NO_STRTOUMAX if you don't have strtoumax in the C library.
723 GIT_CHECK_FUNC(strtoumax,
724 [NO_STRTOUMAX=],
725 [NO_STRTOUMAX=YesPlease])
726 AC_SUBST(NO_STRTOUMAX)
727 #
728 # Define NO_SETENV if you don't have setenv in the C library.
729 GIT_CHECK_FUNC(setenv,
730 [NO_SETENV=],
731 [NO_SETENV=YesPlease])
732 AC_SUBST(NO_SETENV)
733 #
734 # Define NO_UNSETENV if you don't have unsetenv in the C library.
735 GIT_CHECK_FUNC(unsetenv,
736 [NO_UNSETENV=],
737 [NO_UNSETENV=YesPlease])
738 AC_SUBST(NO_UNSETENV)
739 #
740 # Define NO_MKDTEMP if you don't have mkdtemp in the C library.
741 GIT_CHECK_FUNC(mkdtemp,
742 [NO_MKDTEMP=],
743 [NO_MKDTEMP=YesPlease])
744 AC_SUBST(NO_MKDTEMP)
745 #
746 # Define NO_MKSTEMPS if you don't have mkstemps in the C library.
747 GIT_CHECK_FUNC(mkstemps,
748 [NO_MKSTEMPS=],
749 [NO_MKSTEMPS=YesPlease])
750 AC_SUBST(NO_MKSTEMPS)
751 #
752 #
753 # Define NO_MMAP if you want to avoid mmap.
754 #
755 # Define NO_ICONV if your libc does not properly support iconv.
758 ## Other checks.
759 # Define USE_PIC if you need the main git objects to be built with -fPIC
760 # in order to build and link perl/Git.so. x86-64 seems to need this.
761 #
762 # Define NO_SYMLINK_HEAD if you never want .git/HEAD to be a symbolic link.
763 # Enable it on Windows. By default, symrefs are still used.
764 #
765 # Define NO_PTHREADS if we do not have pthreads
766 #
767 # Define PTHREAD_LIBS to the linker flag used for Pthread support and define
768 # THREADED_DELTA_SEARCH if Pthreads are available.
769 AC_DEFUN([PTHREADTEST_SRC], [
770 #include <pthread.h>
772 int main(void)
773 {
774 pthread_mutex_t test_mutex;
775 return (0);
776 }
777 ])
779 dnl AC_LANG_CONFTEST([AC_LANG_PROGRAM(
780 dnl [[#include <pthread.h>]],
781 dnl [[pthread_mutex_t test_mutex;]]
782 dnl )])
784 NO_PTHREADS=UnfortunatelyYes
785 THREADED_DELTA_SEARCH=
786 PTHREAD_LIBS=
788 if test -n "$USER_NOPTHREAD"; then
789 AC_MSG_NOTICE([Skipping POSIX Threads at user request.])
790 # handle these separately since PTHREAD_CFLAGS could be '-lpthreads
791 # -D_REENTRANT' or some such.
792 elif test -z "$PTHREAD_CFLAGS"; then
793 for opt in -pthread -lpthread; do
794 old_CFLAGS="$CFLAGS"
795 CFLAGS="$opt $CFLAGS"
796 AC_MSG_CHECKING([Checking for POSIX Threads with '$opt'])
797 AC_LINK_IFELSE(PTHREADTEST_SRC,
798 [AC_MSG_RESULT([yes])
799 NO_PTHREADS=
800 PTHREAD_LIBS="$opt"
801 THREADED_DELTA_SEARCH=YesPlease
802 break
803 ],
804 [AC_MSG_RESULT([no])])
805 CFLAGS="$old_CFLAGS"
806 done
807 else
808 old_CFLAGS="$CFLAGS"
809 CFLAGS="$PTHREAD_CFLAGS $CFLAGS"
810 AC_MSG_CHECKING([Checking for POSIX Threads with '$PTHREAD_CFLAGS'])
811 AC_LINK_IFELSE(PTHREADTEST_SRC,
812 [AC_MSG_RESULT([yes])
813 NO_PTHREADS=
814 PTHREAD_LIBS="$PTHREAD_CFLAGS"
815 THREADED_DELTA_SEARCH=YesPlease
816 ],
817 [AC_MSG_RESULT([no])])
819 CFLAGS="$old_CFLAGS"
820 fi
822 CFLAGS="$old_CFLAGS"
824 AC_SUBST(PTHREAD_LIBS)
825 AC_SUBST(NO_PTHREADS)
826 AC_SUBST(THREADED_DELTA_SEARCH)
828 ## Output files
829 AC_CONFIG_FILES(["${config_file}":"${config_in}":"${config_append}"])
830 AC_OUTPUT
833 ## Cleanup
834 rm -f "${config_append}"