| blob | bbdde85c3dcca460dd0aebee6415ccce184885dc |
1 # -*- Autoconf -*-
2 # Process this file with autoconf to produce a configure script.
4 ## Definitions of private macros.
6 # GIT_CONF_SUBST(VAL, VAR)
7 # ------------------------
8 # Cause the line "VAR=VAL" to be eventually appended to ${config_file}.
9 AC_DEFUN([GIT_CONF_SUBST],
10 [AC_REQUIRE([GIT_CONF_SUBST_INIT])
11 config_appended_defs="$config_appended_defs${newline}dnl
12 $1=m4_if([$#],[1],[${$1}],[$2])"])
14 # GIT_CONF_SUBST_INIT
15 # -------------------
16 # Prepare shell variables and autoconf machine required by later calls
17 # to GIT_CONF_SUBST.
18 AC_DEFUN([GIT_CONF_SUBST_INIT],
19 [config_appended_defs=; newline='
20 '
21 AC_CONFIG_COMMANDS([$config_file],
22 [echo "$config_appended_defs" >> "$config_file"],
23 [config_file=$config_file
24 config_appended_defs="$config_appended_defs"])])
26 # GIT_ARG_SET_PATH(PROGRAM)
27 # -------------------------
28 # Provide --with-PROGRAM=PATH option to set PATH to PROGRAM
29 # Optional second argument allows setting NO_PROGRAM=YesPlease if
30 # --without-PROGRAM version used.
31 AC_DEFUN([GIT_ARG_SET_PATH],
32 [AC_ARG_WITH([$1],
33 [AS_HELP_STRING([--with-$1=PATH],
34 [provide PATH to $1])],
35 [GIT_CONF_APPEND_PATH([$1], [$2])],
36 [])])
38 # GIT_CONF_APPEND_PATH(PROGRAM)
39 # -----------------------------
40 # Parse --with-PROGRAM=PATH option to set PROGRAM_PATH=PATH
41 # Used by GIT_ARG_SET_PATH(PROGRAM)
42 # Optional second argument allows setting NO_PROGRAM=YesPlease if
43 # --without-PROGRAM is used.
44 AC_DEFUN([GIT_CONF_APPEND_PATH],
45 [m4_pushdef([GIT_UC_PROGRAM], m4_toupper([$1]))dnl
46 if test "$withval" = "no"; then
47 if test -n "$2"; then
48 GIT_UC_PROGRAM[]_PATH=$withval
49 AC_MSG_NOTICE([Disabling use of GIT_UC_PROGRAM])
50 GIT_CONF_SUBST([NO_]GIT_UC_PROGRAM, [YesPlease])
51 GIT_CONF_SUBST(GIT_UC_PROGRAM[]_PATH, [])
52 else
53 AC_MSG_ERROR([You cannot use git without $1])
54 fi
55 else
56 if test "$withval" = "yes"; then
57 AC_MSG_WARN([You should provide path for --with-$1=PATH])
58 else
59 GIT_UC_PROGRAM[]_PATH=$withval
60 AC_MSG_NOTICE([Setting GIT_UC_PROGRAM[]_PATH to $withval])
61 GIT_CONF_SUBST(GIT_UC_PROGRAM[]_PATH, [$withval])
62 fi
63 fi
64 m4_popdef([GIT_UC_PROGRAM])])
66 # GIT_PARSE_WITH(PACKAGE)
67 # -----------------------
68 # For use in AC_ARG_WITH action-if-found, for packages default ON.
69 # * Set NO_PACKAGE=YesPlease for --without-PACKAGE
70 # * Set PACKAGEDIR=PATH for --with-PACKAGE=PATH
71 # * Unset NO_PACKAGE for --with-PACKAGE without ARG
72 AC_DEFUN([GIT_PARSE_WITH],
73 [m4_pushdef([GIT_UC_PACKAGE], m4_toupper([$1]))dnl
74 if test "$withval" = "no"; then
75 NO_[]GIT_UC_PACKAGE=YesPlease
76 elif test "$withval" = "yes"; then
77 NO_[]GIT_UC_PACKAGE=
78 else
79 NO_[]GIT_UC_PACKAGE=
80 GIT_UC_PACKAGE[]DIR=$withval
81 AC_MSG_NOTICE([Setting GIT_UC_PACKAGE[]DIR to $withval])
82 GIT_CONF_SUBST(GIT_UC_PACKAGE[DIR], [$withval])
83 fi
84 m4_popdef([GIT_UC_PACKAGE])])
86 # GIT_PARSE_WITH_SET_MAKE_VAR(WITHNAME, VAR, HELP_TEXT)
87 # -----------------------------------------------------
88 # Set VAR to the value specied by --with-WITHNAME.
89 # No verification of arguments is performed, but warnings are issued
90 # if either 'yes' or 'no' is specified.
91 # HELP_TEXT is presented when --help is called.
92 # This is a direct way to allow setting variables in the Makefile.
93 AC_DEFUN([GIT_PARSE_WITH_SET_MAKE_VAR],
94 [AC_ARG_WITH([$1],
95 [AS_HELP_STRING([--with-$1=VALUE], $3)],
96 if test -n "$withval"; then
97 if test "$withval" = "yes" -o "$withval" = "no"; then
98 AC_MSG_WARN([You likely do not want either 'yes' or 'no' as]
99 [a value for $1 ($2). Maybe you do...?])
100 fi
101 AC_MSG_NOTICE([Setting $2 to $withval])
102 GIT_CONF_SUBST([$2], [$withval])
103 fi)])# GIT_PARSE_WITH_SET_MAKE_VAR
105 #
106 # GIT_CHECK_FUNC(FUNCTION, IFTRUE, IFFALSE)
107 # -----------------------------------------
108 # Similar to AC_CHECK_FUNC, but on systems that do not generate
109 # warnings for missing prototypes (e.g. FreeBSD when compiling without
110 # -Wall), it does not work. By looking for function definition in
111 # libraries, this problem can be worked around.
112 AC_DEFUN([GIT_CHECK_FUNC],[AC_CHECK_FUNC([$1],[
113 AC_SEARCH_LIBS([$1],,
114 [$2],[$3])
115 ],[$3])])
117 #
118 # GIT_STASH_FLAGS(BASEPATH_VAR)
119 # -----------------------------
120 # Allow for easy stashing of LDFLAGS and CPPFLAGS before running
121 # tests that may want to take user settings into account.
122 AC_DEFUN([GIT_STASH_FLAGS],[
123 if test -n "$1"; then
124 old_CPPFLAGS="$CPPFLAGS"
125 old_LDFLAGS="$LDFLAGS"
126 CPPFLAGS="-I$1/include $CPPFLAGS"
127 LDFLAGS="-L$1/$lib $LDFLAGS"
128 fi
129 ])
131 dnl
132 dnl GIT_UNSTASH_FLAGS(BASEPATH_VAR)
133 dnl -----------------------------
134 dnl Restore the stashed *FLAGS values.
135 AC_DEFUN([GIT_UNSTASH_FLAGS],[
136 if test -n "$1"; then
137 CPPFLAGS="$old_CPPFLAGS"
138 LDFLAGS="$old_LDFLAGS"
139 fi
140 ])
142 ## Configure body starts here.
144 AC_PREREQ(2.59)
145 AC_INIT([git], [@@GIT_VERSION@@], [git@vger.kernel.org])
147 AC_CONFIG_SRCDIR([git.c])
149 config_file=config.mak.autogen
150 config_in=config.mak.in
152 GIT_CONF_SUBST([AUTOCONFIGURED], [YesPlease])
154 # Directories holding "saner" versions of common or POSIX binaries.
155 AC_ARG_WITH([sane-tool-path],
156 [AS_HELP_STRING(
157 [--with-sane-tool-path=DIR-1[[:DIR-2...:DIR-n]]],
158 [Directories to prepend to PATH in build system and generated scripts])],
159 [if test "$withval" = "no"; then
160 withval=''
161 else
162 AC_MSG_NOTICE([Setting SANE_TOOL_PATH to '$withval'])
163 fi
164 GIT_CONF_SUBST([SANE_TOOL_PATH], [$withval])],
165 [# If the "--with-sane-tool-path" option was not given, don't touch
166 # SANE_TOOL_PATH here, but let defaults in Makefile take care of it.
167 # This should minimize spurious differences in the behaviour of the
168 # Git build system when configure is used w.r.t. when it is not.
169 :])
171 ## Site configuration related to programs (before tests)
172 ## --with-PACKAGE[=ARG] and --without-PACKAGE
173 #
174 # Set lib to alternative name of lib directory (e.g. lib64)
175 AC_ARG_WITH([lib],
176 [AS_HELP_STRING([--with-lib=ARG],
177 [ARG specifies alternative name for lib directory])],
178 [if test "$withval" = "no" || test "$withval" = "yes"; then
179 AC_MSG_WARN([You should provide name for --with-lib=ARG])
180 else
181 lib=$withval
182 AC_MSG_NOTICE([Setting lib to '$lib'])
183 GIT_CONF_SUBST([lib])
184 fi])
186 if test -z "$lib"; then
187 AC_MSG_NOTICE([Setting lib to 'lib' (the default)])
188 lib=lib
189 fi
191 AC_ARG_ENABLE([pthreads],
192 [AS_HELP_STRING([--enable-pthreads=FLAGS],
193 [FLAGS is the value to pass to the compiler to enable POSIX Threads.]
194 [The default if FLAGS is not specified is to try first -pthread]
195 [and then -lpthread.]
196 [--disable-pthreads will disable threading.])],
197 [
198 if test "x$enableval" = "xyes"; then
199 AC_MSG_NOTICE([Will try -pthread then -lpthread to enable POSIX Threads])
200 elif test "x$enableval" != "xno"; then
201 PTHREAD_CFLAGS=$enableval
202 AC_MSG_NOTICE([Setting '$PTHREAD_CFLAGS' as the FLAGS to enable POSIX Threads])
203 else
204 AC_MSG_NOTICE([POSIX Threads will be disabled.])
205 NO_PTHREADS=YesPlease
206 USER_NOPTHREAD=1
207 fi],
208 [
209 AC_MSG_NOTICE([Will try -pthread then -lpthread to enable POSIX Threads.])
210 ])
212 # Define option to enable JavaScript minification
213 AC_ARG_ENABLE([jsmin],
214 [AS_HELP_STRING([--enable-jsmin=PATH],
215 [PATH is the name of a JavaScript minifier or the absolute path to one.])],
216 [
217 JSMIN=$enableval;
218 AC_MSG_NOTICE([Setting JSMIN to '$JSMIN' to enable JavaScript minifying])
219 GIT_CONF_SUBST([JSMIN])
220 ])
222 # Define option to enable CSS minification
223 AC_ARG_ENABLE([cssmin],
224 [AS_HELP_STRING([--enable-cssmin=PATH],
225 [PATH is the name of a CSS minifier or the absolute path to one.])],
226 [
227 CSSMIN=$enableval;
228 AC_MSG_NOTICE([Setting CSSMIN to '$CSSMIN' to enable CSS minifying])
229 GIT_CONF_SUBST([CSSMIN])
230 ])
232 ## Site configuration (override autodetection)
233 ## --with-PACKAGE[=ARG] and --without-PACKAGE
234 AC_MSG_NOTICE([CHECKS for site configuration])
235 #
236 # Define NO_SVN_TESTS if you want to skip time-consuming SVN interoperability
237 # tests. These tests take up a significant amount of the total test time
238 # but are not needed unless you plan to talk to SVN repos.
239 #
240 # Define PPC_SHA1 environment variable when running make to make use of
241 # a bundled SHA1 routine optimized for PowerPC.
242 #
243 # Define NO_OPENSSL environment variable if you do not have OpenSSL.
244 # This also implies BLK_SHA1.
245 #
246 # Define OPENSSLDIR=/foo/bar if your openssl header and library files are in
247 # /foo/bar/include and /foo/bar/lib directories.
248 AC_ARG_WITH(openssl,
249 AS_HELP_STRING([--with-openssl],[use OpenSSL library (default is YES)])
250 AS_HELP_STRING([], [ARG can be prefix for openssl library and headers]),
251 GIT_PARSE_WITH([openssl]))
253 # Define USE_LIBPCRE if you have and want to use libpcre. git-grep will be
254 # able to use Perl-compatible regular expressions.
255 #
256 # Define LIBPCREDIR=/foo/bar if your libpcre header and library files are in
257 # /foo/bar/include and /foo/bar/lib directories.
258 #
259 AC_ARG_WITH(libpcre,
260 AS_HELP_STRING([--with-libpcre],[support Perl-compatible regexes (default is NO)])
261 AS_HELP_STRING([], [ARG can be also prefix for libpcre library and headers]),
262 if test "$withval" = "no"; then
263 USE_LIBPCRE=
264 elif test "$withval" = "yes"; then
265 USE_LIBPCRE=YesPlease
266 else
267 USE_LIBPCRE=YesPlease
268 LIBPCREDIR=$withval
269 AC_MSG_NOTICE([Setting LIBPCREDIR to $LIBPCREDIR])
270 dnl USE_LIBPCRE can still be modified below, so don't substitute
271 dnl it yet.
272 GIT_CONF_SUBST([LIBPCREDIR])
273 fi)
274 #
275 # Define HAVE_ALLOCA_H if you have working alloca(3) defined in that header.
276 AC_FUNC_ALLOCA
277 case $ac_cv_working_alloca_h in
278 yes) HAVE_ALLOCA_H=YesPlease;;
279 *) HAVE_ALLOCA_H='';;
280 esac
281 GIT_CONF_SUBST([HAVE_ALLOCA_H])
282 #
283 # Define NO_CURL if you do not have curl installed. git-http-pull and
284 # git-http-push are not built, and you cannot use http:// and https://
285 # transports.
286 #
287 # Define CURLDIR=/foo/bar if your curl header and library files are in
288 # /foo/bar/include and /foo/bar/lib directories.
289 AC_ARG_WITH(curl,
290 AS_HELP_STRING([--with-curl],[support http(s):// transports (default is YES)])
291 AS_HELP_STRING([], [ARG can be also prefix for curl library and headers]),
292 GIT_PARSE_WITH(curl))
293 #
294 # Define NO_EXPAT if you do not have expat installed. git-http-push is
295 # not built, and you cannot push using http:// and https:// transports.
296 #
297 # Define EXPATDIR=/foo/bar if your expat header and library files are in
298 # /foo/bar/include and /foo/bar/lib directories.
299 AC_ARG_WITH(expat,
300 AS_HELP_STRING([--with-expat],
301 [support git-push using http:// and https:// transports via WebDAV (default is YES)])
302 AS_HELP_STRING([], [ARG can be also prefix for expat library and headers]),
303 GIT_PARSE_WITH(expat))
304 #
305 # Define NO_FINK if you are building on Darwin/Mac OS X, have Fink
306 # installed in /sw, but don't want GIT to link against any libraries
307 # installed there. If defined you may specify your own (or Fink's)
308 # include directories and library directories by defining CFLAGS
309 # and LDFLAGS appropriately.
310 #
311 # Define NO_DARWIN_PORTS if you are building on Darwin/Mac OS X,
312 # have DarwinPorts installed in /opt/local, but don't want GIT to
313 # link against any libraries installed there. If defined you may
314 # specify your own (or DarwinPort's) include directories and
315 # library directories by defining CFLAGS and LDFLAGS appropriately.
316 #
317 # Define NO_MMAP if you want to avoid mmap.
318 #
319 # Define NO_ICONV if your libc does not properly support iconv.
320 AC_ARG_WITH(iconv,
321 AS_HELP_STRING([--without-iconv],
322 [if your architecture doesn't properly support iconv])
323 AS_HELP_STRING([--with-iconv=PATH],
324 [PATH is prefix for libiconv library and headers])
325 AS_HELP_STRING([],
326 [used only if you need linking with libiconv]),
327 GIT_PARSE_WITH(iconv))
329 ## --enable-FEATURE[=ARG] and --disable-FEATURE
330 #
331 # Define USE_NSEC below if you want git to care about sub-second file mtimes
332 # and ctimes. Note that you need recent glibc (at least 2.2.4) for this, and
333 # it will BREAK YOUR LOCAL DIFFS! show-diff and anything using it will likely
334 # randomly break unless your underlying filesystem supports those sub-second
335 # times (my ext3 doesn't).
336 #
337 # Define USE_STDEV below if you want git to care about the underlying device
338 # change being considered an inode change from the update-index perspective.
340 #
341 # Allow user to set ETC_GITCONFIG variable
342 GIT_PARSE_WITH_SET_MAKE_VAR(gitconfig, ETC_GITCONFIG,
343 Use VALUE instead of /etc/gitconfig as the
344 global git configuration file.
345 If VALUE is not fully qualified it will be interpreted
346 as a path relative to the computed prefix at runtime.)
348 #
349 # Allow user to set ETC_GITATTRIBUTES variable
350 GIT_PARSE_WITH_SET_MAKE_VAR(gitattributes, ETC_GITATTRIBUTES,
351 Use VALUE instead of /etc/gitattributes as the
352 global git attributes file.
353 If VALUE is not fully qualified it will be interpreted
354 as a path relative to the computed prefix at runtime.)
356 #
357 # Allow user to set the default pager
358 GIT_PARSE_WITH_SET_MAKE_VAR(pager, DEFAULT_PAGER,
359 Use VALUE as the fall-back pager instead of 'less'.
360 This is used by things like 'git log' when the user
361 does not specify a pager to use through alternate
362 methods. eg: /usr/bin/pager)
363 #
364 # Allow user to set the default editor
365 GIT_PARSE_WITH_SET_MAKE_VAR(editor, DEFAULT_EDITOR,
366 Use VALUE as the fall-back editor instead of 'vi'.
367 This is used by things like 'git commit' when the user
368 does not specify a preferred editor through other
369 methods. eg: /usr/bin/editor)
371 #
372 # Define SHELL_PATH to provide path to shell.
373 GIT_ARG_SET_PATH(shell)
374 #
375 # Define PERL_PATH to provide path to Perl.
376 GIT_ARG_SET_PATH(perl)
377 #
378 # Define PYTHON_PATH to provide path to Python.
379 GIT_ARG_SET_PATH(python, allow-without)
380 #
381 # Define ZLIB_PATH to provide path to zlib.
382 GIT_ARG_SET_PATH(zlib)
383 #
384 # Declare the with-tcltk/without-tcltk options.
385 AC_ARG_WITH(tcltk,
386 AS_HELP_STRING([--with-tcltk],[use Tcl/Tk GUI (default is YES)])
387 AS_HELP_STRING([],[ARG is the full path to the Tcl/Tk interpreter.])
388 AS_HELP_STRING([],[Bare --with-tcltk will make the GUI part only if])
389 AS_HELP_STRING([],[Tcl/Tk interpreter will be found in a system.]),
390 GIT_PARSE_WITH(tcltk))
391 #
394 ## Checks for programs.
395 AC_MSG_NOTICE([CHECKS for programs])
396 #
397 AC_PROG_CC([cc gcc])
398 AC_C_INLINE
399 case $ac_cv_c_inline in
400 inline | yes | no) INLINE='';;
401 *) INLINE=$ac_cv_c_inline ;;
402 esac
403 GIT_CONF_SUBST([INLINE])
405 # which switch to pass runtime path to dynamic libraries to the linker
406 AC_CACHE_CHECK([if linker supports -R], git_cv_ld_dashr, [
407 SAVE_LDFLAGS="${LDFLAGS}"
408 LDFLAGS="${SAVE_LDFLAGS} -R /"
409 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [git_cv_ld_dashr=yes], [git_cv_ld_dashr=no])
410 LDFLAGS="${SAVE_LDFLAGS}"
411 ])
412 if test "$git_cv_ld_dashr" = "yes"; then
413 CC_LD_DYNPATH=-R
414 else
415 AC_CACHE_CHECK([if linker supports -Wl,-rpath,], git_cv_ld_wl_rpath, [
416 SAVE_LDFLAGS="${LDFLAGS}"
417 LDFLAGS="${SAVE_LDFLAGS} -Wl,-rpath,/"
418 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [git_cv_ld_wl_rpath=yes], [git_cv_ld_wl_rpath=no])
419 LDFLAGS="${SAVE_LDFLAGS}"
420 ])
421 if test "$git_cv_ld_wl_rpath" = "yes"; then
422 CC_LD_DYNPATH=-Wl,-rpath,
423 else
424 AC_CACHE_CHECK([if linker supports -rpath], git_cv_ld_rpath, [
425 SAVE_LDFLAGS="${LDFLAGS}"
426 LDFLAGS="${SAVE_LDFLAGS} -rpath /"
427 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [git_cv_ld_rpath=yes], [git_cv_ld_rpath=no])
428 LDFLAGS="${SAVE_LDFLAGS}"
429 ])
430 if test "$git_cv_ld_rpath" = "yes"; then
431 CC_LD_DYNPATH=-rpath
432 else
433 CC_LD_DYNPATH=
434 AC_MSG_WARN([linker does not support runtime path to dynamic libraries])
435 fi
436 fi
437 fi
438 GIT_CONF_SUBST([CC_LD_DYNPATH])
439 #AC_PROG_INSTALL # needs install-sh or install.sh in sources
440 AC_CHECK_TOOLS(AR, [gar ar], :)
441 AC_CHECK_PROGS(TAR, [gtar tar])
442 AC_CHECK_PROGS(DIFF, [gnudiff gdiff diff])
443 # TCLTK_PATH will be set to some value if we want Tcl/Tk
444 # or will be empty otherwise.
445 if test -n "$NO_TCLTK"; then
446 TCLTK_PATH=
447 else
448 if test "$with_tcltk" = ""; then
449 # No Tcl/Tk switches given. Do not check for Tcl/Tk, use bare 'wish'.
450 TCLTK_PATH=wish
451 elif test "$with_tcltk" = "yes"; then
452 # Tcl/Tk check requested.
453 AC_CHECK_PROGS(TCLTK_PATH, [wish], )
454 else
455 AC_MSG_RESULT([Using Tcl/Tk interpreter $with_tcltk])
456 TCLTK_PATH="$with_tcltk"
457 fi
458 fi
459 GIT_CONF_SUBST([TCLTK_PATH])
460 AC_CHECK_PROGS(ASCIIDOC, [asciidoc])
461 if test -n "$ASCIIDOC"; then
462 AC_MSG_CHECKING([for asciidoc version])
463 asciidoc_version=`$ASCIIDOC --version 2>/dev/null`
464 case "${asciidoc_version}" in
465 asciidoc' '8*)
466 AC_MSG_RESULT([${asciidoc_version}])
467 ;;
468 *)
469 AC_MSG_RESULT([${asciidoc_version} (unknown)])
470 ;;
471 esac
472 fi
475 ## Checks for libraries.
476 AC_MSG_NOTICE([CHECKS for libraries])
477 #
478 # Define NO_OPENSSL environment variable if you do not have OpenSSL.
479 # Define NEEDS_SSL_WITH_CRYPTO if you need -lcrypto with -lssl (Darwin).
481 GIT_STASH_FLAGS($OPENSSLDIR)
483 AC_CHECK_LIB([crypto], [SHA1_Init],
484 [NEEDS_SSL_WITH_CRYPTO=],
485 [AC_CHECK_LIB([ssl], [SHA1_Init],
486 [NEEDS_SSL_WITH_CRYPTO=YesPlease NO_OPENSSL=],
487 [NEEDS_SSL_WITH_CRYPTO= NO_OPENSSL=YesPlease])])
489 GIT_UNSTASH_FLAGS($OPENSSLDIR)
491 GIT_CONF_SUBST([NEEDS_SSL_WITH_CRYPTO])
492 GIT_CONF_SUBST([NO_OPENSSL])
494 #
495 # Define USE_LIBPCRE if you have and want to use libpcre. git-grep will be
496 # able to use Perl-compatible regular expressions.
497 #
499 if test -n "$USE_LIBPCRE"; then
501 GIT_STASH_FLAGS($LIBPCREDIR)
503 AC_CHECK_LIB([pcre], [pcre_version],
504 [USE_LIBPCRE=YesPlease],
505 [USE_LIBPCRE=])
507 GIT_UNSTASH_FLAGS($LIBPCREDIR)
509 GIT_CONF_SUBST([USE_LIBPCRE])
511 fi
513 #
514 # Define NO_CURL if you do not have libcurl installed. git-http-pull and
515 # git-http-push are not built, and you cannot use http:// and https://
516 # transports.
518 GIT_STASH_FLAGS($CURLDIR)
520 AC_CHECK_LIB([curl], [curl_global_init],
521 [NO_CURL=],
522 [NO_CURL=YesPlease])
524 GIT_UNSTASH_FLAGS($CURLDIR)
526 GIT_CONF_SUBST([NO_CURL])
528 #
529 # Define NO_EXPAT if you do not have expat installed. git-http-push is
530 # not built, and you cannot push using http:// and https:// transports.
532 GIT_STASH_FLAGS($EXPATDIR)
534 AC_CHECK_LIB([expat], [XML_ParserCreate],
535 [NO_EXPAT=],
536 [NO_EXPAT=YesPlease])
538 GIT_UNSTASH_FLAGS($EXPATDIR)
540 GIT_CONF_SUBST([NO_EXPAT])
542 #
543 # Define NEEDS_LIBICONV if linking with libc is not enough (Darwin and
544 # some Solaris installations).
545 # Define NO_ICONV if neither libc nor libiconv support iconv.
547 if test -z "$NO_ICONV"; then
549 GIT_STASH_FLAGS($ICONVDIR)
551 AC_DEFUN([ICONVTEST_SRC],
552 [AC_LANG_PROGRAM([#include <iconv.h>],
553 [iconv_open("", "");])])
555 if test -n "$ICONVDIR"; then
556 lib_order="-liconv -lc"
557 else
558 lib_order="-lc -liconv"
559 fi
561 NO_ICONV=YesPlease
563 for l in $lib_order; do
564 if test "$l" = "-liconv"; then
565 NEEDS_LIBICONV=YesPlease
566 else
567 NEEDS_LIBICONV=
568 fi
570 old_LIBS="$LIBS"
571 LIBS="$LIBS $l"
572 AC_MSG_CHECKING([for iconv in $l])
573 AC_LINK_IFELSE([ICONVTEST_SRC],
574 [AC_MSG_RESULT([yes])
575 NO_ICONV=
576 break],
577 [AC_MSG_RESULT([no])])
578 LIBS="$old_LIBS"
579 done
581 #in case of break
582 LIBS="$old_LIBS"
584 GIT_UNSTASH_FLAGS($ICONVDIR)
586 GIT_CONF_SUBST([NEEDS_LIBICONV])
587 GIT_CONF_SUBST([NO_ICONV])
589 if test -n "$NO_ICONV"; then
590 NEEDS_LIBICONV=
591 fi
593 fi
595 #
596 # Define NO_DEFLATE_BOUND if deflateBound is missing from zlib.
598 GIT_STASH_FLAGS($ZLIB_PATH)
600 AC_DEFUN([ZLIBTEST_SRC], [
601 AC_LANG_PROGRAM([#include <zlib.h>],
602 [deflateBound(0, 0);])])
603 AC_MSG_CHECKING([for deflateBound in -lz])
604 old_LIBS="$LIBS"
605 LIBS="$LIBS -lz"
606 AC_LINK_IFELSE([ZLIBTEST_SRC],
607 [AC_MSG_RESULT([yes])],
608 [AC_MSG_RESULT([no])
609 NO_DEFLATE_BOUND=yes])
610 LIBS="$old_LIBS"
612 GIT_UNSTASH_FLAGS($ZLIB_PATH)
614 GIT_CONF_SUBST([NO_DEFLATE_BOUND])
616 #
617 # Define NEEDS_SOCKET if linking with libc is not enough (SunOS,
618 # Patrick Mauritz).
619 AC_CHECK_LIB([c], [socket],
620 [NEEDS_SOCKET=],
621 [NEEDS_SOCKET=YesPlease])
622 GIT_CONF_SUBST([NEEDS_SOCKET])
623 test -n "$NEEDS_SOCKET" && LIBS="$LIBS -lsocket"
625 #
626 # The next few tests will define NEEDS_RESOLV if linking with
627 # libresolv provides some of the functions we would normally get
628 # from libc.
629 NEEDS_RESOLV=
630 #
631 # Define NO_INET_NTOP if linking with -lresolv is not enough.
632 # Solaris 2.7 in particular hos inet_ntop in -lresolv.
633 NO_INET_NTOP=
634 AC_CHECK_FUNC([inet_ntop],
635 [],
636 [AC_CHECK_LIB([resolv], [inet_ntop],
637 [NEEDS_RESOLV=YesPlease],
638 [NO_INET_NTOP=YesPlease])
639 ])
640 GIT_CONF_SUBST([NO_INET_NTOP])
641 #
642 # Define NO_INET_PTON if linking with -lresolv is not enough.
643 # Solaris 2.7 in particular hos inet_pton in -lresolv.
644 NO_INET_PTON=
645 AC_CHECK_FUNC([inet_pton],
646 [],
647 [AC_CHECK_LIB([resolv], [inet_pton],
648 [NEEDS_RESOLV=YesPlease],
649 [NO_INET_PTON=YesPlease])
650 ])
651 GIT_CONF_SUBST([NO_INET_PTON])
652 #
653 # Define NO_HSTRERROR if linking with -lresolv is not enough.
654 # Solaris 2.6 in particular has no hstrerror, even in -lresolv.
655 NO_HSTRERROR=
656 AC_CHECK_FUNC([hstrerror],
657 [],
658 [AC_CHECK_LIB([resolv], [hstrerror],
659 [NEEDS_RESOLV=YesPlease],
660 [NO_HSTRERROR=YesPlease])
661 ])
662 GIT_CONF_SUBST([NO_HSTRERROR])
664 dnl This must go after all the possible places for its initialization,
665 dnl in the AC_CHECK_FUNC invocations above.
666 GIT_CONF_SUBST([NEEDS_RESOLV])
667 #
668 # If any of the above tests determined that -lresolv is needed at
669 # build-time, also set it here for remaining configure-time checks.
670 test -n "$NEEDS_RESOLV" && LIBS="$LIBS -lresolv"
672 AC_CHECK_LIB([c], [basename],
673 [NEEDS_LIBGEN=],
674 [NEEDS_LIBGEN=YesPlease])
675 GIT_CONF_SUBST([NEEDS_LIBGEN])
676 test -n "$NEEDS_LIBGEN" && LIBS="$LIBS -lgen"
678 AC_CHECK_LIB([c], [gettext],
679 [LIBC_CONTAINS_LIBINTL=YesPlease],
680 [LIBC_CONTAINS_LIBINTL=])
681 GIT_CONF_SUBST([LIBC_CONTAINS_LIBINTL])
683 #
684 # Define NO_GETTEXT if you don't want Git output to be translated.
685 # A translated Git requires GNU libintl or another gettext implementation
686 AC_CHECK_HEADER([libintl.h],
687 [NO_GETTEXT=],
688 [NO_GETTEXT=YesPlease])
689 GIT_CONF_SUBST([NO_GETTEXT])
691 if test -z "$NO_GETTEXT"; then
692 test -n "$LIBC_CONTAINS_LIBINTL" || LIBS="$LIBS -lintl"
693 fi
695 ## Checks for header files.
696 AC_MSG_NOTICE([CHECKS for header files])
697 #
698 # Define NO_SYS_SELECT_H if you don't have sys/select.h.
699 AC_CHECK_HEADER([sys/select.h],
700 [NO_SYS_SELECT_H=],
701 [NO_SYS_SELECT_H=UnfortunatelyYes])
702 GIT_CONF_SUBST([NO_SYS_SELECT_H])
703 #
704 # Define NO_SYS_POLL_H if you don't have sys/poll.h
705 AC_CHECK_HEADER([sys/poll.h],
706 [NO_SYS_POLL_H=],
707 [NO_SYS_POLL_H=UnfortunatelyYes])
708 GIT_CONF_SUBST([NO_SYS_POLL_H])
709 #
710 # Define NO_INTTYPES_H if you don't have inttypes.h
711 AC_CHECK_HEADER([inttypes.h],
712 [NO_INTTYPES_H=],
713 [NO_INTTYPES_H=UnfortunatelyYes])
714 GIT_CONF_SUBST([NO_INTTYPES_H])
715 #
716 # Define OLD_ICONV if your library has an old iconv(), where the second
717 # (input buffer pointer) parameter is declared with type (const char **).
718 AC_DEFUN([OLDICONVTEST_SRC], [
719 AC_LANG_PROGRAM([[
720 #include <iconv.h>
722 extern size_t iconv(iconv_t cd,
723 char **inbuf, size_t *inbytesleft,
724 char **outbuf, size_t *outbytesleft);
725 ]], [])])
727 GIT_STASH_FLAGS($ICONVDIR)
729 AC_MSG_CHECKING([for old iconv()])
730 AC_COMPILE_IFELSE([OLDICONVTEST_SRC],
731 [AC_MSG_RESULT([no])],
732 [AC_MSG_RESULT([yes])
733 OLD_ICONV=UnfortunatelyYes])
735 GIT_UNSTASH_FLAGS($ICONVDIR)
737 GIT_CONF_SUBST([OLD_ICONV])
739 ## Checks for typedefs, structures, and compiler characteristics.
740 AC_MSG_NOTICE([CHECKS for typedefs, structures, and compiler characteristics])
741 #
742 TYPE_SOCKLEN_T
743 case $ac_cv_type_socklen_t in
744 yes) SOCKLEN_T='';;
745 *) SOCKLEN_T=$git_cv_socklen_t_equiv;;
746 esac
747 GIT_CONF_SUBST([SOCKLEN_T])
749 #
750 # Define NO_STRUCT_ITIMERVAL if you don't have struct itimerval.
751 AC_CHECK_TYPES([struct itimerval],
752 [NO_STRUCT_ITIMERVAL=],
753 [NO_STRUCT_ITIMERVAL=UnfortunatelyYes],
754 [#include <sys/time.h>])
755 GIT_CONF_SUBST([NO_STRUCT_ITIMERVAL])
756 #
757 # Define USE_ST_TIMESPEC=YesPlease when stat.st_mtimespec.tv_nsec exists.
758 # Define NO_NSEC=YesPlease when neither stat.st_mtim.tv_nsec nor
759 # stat.st_mtimespec.tv_nsec exists.
760 AC_CHECK_MEMBER([struct stat.st_mtimespec.tv_nsec])
761 AC_CHECK_MEMBER([struct stat.st_mtim.tv_nsec])
762 if test x$ac_cv_member_struct_stat_st_mtimespec_tv_nsec = xyes; then
763 USE_ST_TIMESPEC=YesPlease
764 GIT_CONF_SUBST([USE_ST_TIMESPEC])
765 elif test x$ac_cv_member_struct_stat_st_mtim_tv_nsec != xyes; then
766 NO_NSEC=YesPlease
767 GIT_CONF_SUBST([NO_NSEC])
768 fi
769 #
770 # Define NO_D_INO_IN_DIRENT if you don't have d_ino in your struct dirent.
771 AC_CHECK_MEMBER(struct dirent.d_ino,
772 [NO_D_INO_IN_DIRENT=],
773 [NO_D_INO_IN_DIRENT=YesPlease],
774 [#include <dirent.h>])
775 GIT_CONF_SUBST([NO_D_INO_IN_DIRENT])
776 #
777 # Define NO_D_TYPE_IN_DIRENT if your platform defines DT_UNKNOWN but lacks
778 # d_type in struct dirent (latest Cygwin -- will be fixed soonish).
779 AC_CHECK_MEMBER(struct dirent.d_type,
780 [NO_D_TYPE_IN_DIRENT=],
781 [NO_D_TYPE_IN_DIRENT=YesPlease],
782 [#include <dirent.h>])
783 GIT_CONF_SUBST([NO_D_TYPE_IN_DIRENT])
784 #
785 # Define NO_GECOS_IN_PWENT if you don't have pw_gecos in struct passwd
786 # in the C library.
787 AC_CHECK_MEMBER(struct passwd.pw_gecos,
788 [NO_GECOS_IN_PWENT=],
789 [NO_GECOS_IN_PWENT=YesPlease],
790 [#include <pwd.h>])
791 GIT_CONF_SUBST([NO_GECOS_IN_PWENT])
792 #
793 # Define NO_SOCKADDR_STORAGE if your platform does not have struct
794 # sockaddr_storage.
795 AC_CHECK_TYPE(struct sockaddr_storage,
796 [NO_SOCKADDR_STORAGE=],
797 [NO_SOCKADDR_STORAGE=YesPlease],[
798 #include <sys/types.h>
799 #include <sys/socket.h>
800 ])
801 GIT_CONF_SUBST([NO_SOCKADDR_STORAGE])
802 #
803 # Define NO_IPV6 if you lack IPv6 support and getaddrinfo().
804 AC_CHECK_TYPE([struct addrinfo],[
805 GIT_CHECK_FUNC([getaddrinfo],
806 [NO_IPV6=],
807 [NO_IPV6=YesPlease])
808 ],[NO_IPV6=YesPlease],[
809 #include <sys/types.h>
810 #include <sys/socket.h>
811 #include <netdb.h>
812 ])
813 GIT_CONF_SUBST([NO_IPV6])
814 #
815 # Define NO_REGEX if you have no or inferior regex support in your C library.
816 AC_CACHE_CHECK([whether the platform regex can handle null bytes],
817 [ac_cv_c_excellent_regex], [
818 AC_EGREP_CPP(yippeeyeswehaveit,
819 AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT
820 #include <regex.h>
821 ],
822 [#ifdef REG_STARTEND
823 yippeeyeswehaveit
824 #endif
825 ]),
826 [ac_cv_c_excellent_regex=yes],
827 [ac_cv_c_excellent_regex=no])
828 ])
829 if test $ac_cv_c_excellent_regex = yes; then
830 NO_REGEX=
831 else
832 NO_REGEX=YesPlease
833 fi
834 GIT_CONF_SUBST([NO_REGEX])
835 #
836 # Define FREAD_READS_DIRECTORIES if your are on a system which succeeds
837 # when attempting to read from an fopen'ed directory.
838 AC_CACHE_CHECK([whether system succeeds to read fopen'ed directory],
839 [ac_cv_fread_reads_directories],
840 [
841 AC_RUN_IFELSE(
842 [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
843 [[char c;
844 FILE *f = fopen(".", "r");
845 return f && fread(&c, 1, 1, f)]])],
846 [ac_cv_fread_reads_directories=no],
847 [ac_cv_fread_reads_directories=yes])
848 ])
849 if test $ac_cv_fread_reads_directories = yes; then
850 FREAD_READS_DIRECTORIES=UnfortunatelyYes
851 else
852 FREAD_READS_DIRECTORIES=
853 fi
854 GIT_CONF_SUBST([FREAD_READS_DIRECTORIES])
855 #
856 # Define SNPRINTF_RETURNS_BOGUS if your are on a system which snprintf()
857 # or vsnprintf() return -1 instead of number of characters which would
858 # have been written to the final string if enough space had been available.
859 AC_CACHE_CHECK([whether snprintf() and/or vsnprintf() return bogus value],
860 [ac_cv_snprintf_returns_bogus],
861 [
862 AC_RUN_IFELSE(
863 [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT
864 #include "stdarg.h"
866 int test_vsnprintf(char *str, size_t maxsize, const char *format, ...)
867 {
868 int ret;
869 va_list ap;
870 va_start(ap, format);
871 ret = vsnprintf(str, maxsize, format, ap);
872 va_end(ap);
873 return ret;
874 }],
875 [[char buf[6];
876 if (test_vsnprintf(buf, 3, "%s", "12345") != 5
877 || strcmp(buf, "12")) return 1;
878 if (snprintf(buf, 3, "%s", "12345") != 5
879 || strcmp(buf, "12")) return 1]])],
880 [ac_cv_snprintf_returns_bogus=no],
881 [ac_cv_snprintf_returns_bogus=yes])
882 ])
883 if test $ac_cv_snprintf_returns_bogus = yes; then
884 SNPRINTF_RETURNS_BOGUS=UnfortunatelyYes
885 else
886 SNPRINTF_RETURNS_BOGUS=
887 fi
888 GIT_CONF_SUBST([SNPRINTF_RETURNS_BOGUS])
889 #
890 # Define NEEDS_MODE_TRANSLATION if your OS strays from the typical file type
891 # bits in mode values.
892 AC_CACHE_CHECK([whether the platform uses typical file type bits],
893 [ac_cv_sane_mode_bits], [
894 AC_EGREP_CPP(yippeeyeswehaveit,
895 AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
896 [#if S_IFMT == 0170000 && \
897 S_IFREG == 0100000 && S_IFDIR == 0040000 && S_IFLNK == 0120000 && \
898 S_IFBLK == 0060000 && S_IFCHR == 0020000 && \
899 S_IFIFO == 0010000 && S_IFSOCK == 0140000
900 yippeeyeswehaveit
901 #endif
902 ]),
903 [ac_cv_sane_mode_bits=yes],
904 [ac_cv_sane_mode_bits=no])
905 ])
906 if test $ac_cv_sane_mode_bits = yes; then
907 NEEDS_MODE_TRANSLATION=
908 else
909 NEEDS_MODE_TRANSLATION=UnfortunatelyYes
910 fi
911 GIT_CONF_SUBST([NEEDS_MODE_TRANSLATION])
914 ## Checks for library functions.
915 ## (in default C library and libraries checked by AC_CHECK_LIB)
916 AC_MSG_NOTICE([CHECKS for library functions])
917 #
918 # Define NO_LIBGEN_H if you don't have libgen.h.
919 AC_CHECK_HEADER([libgen.h],
920 [NO_LIBGEN_H=],
921 [NO_LIBGEN_H=YesPlease])
922 GIT_CONF_SUBST([NO_LIBGEN_H])
923 #
924 # Define HAVE_PATHS_H if you have paths.h.
925 AC_CHECK_HEADER([paths.h],
926 [HAVE_PATHS_H=YesPlease],
927 [HAVE_PATHS_H=])
928 GIT_CONF_SUBST([HAVE_PATHS_H])
929 #
930 # Define HAVE_LIBCHARSET_H if have libcharset.h
931 AC_CHECK_HEADER([libcharset.h],
932 [HAVE_LIBCHARSET_H=YesPlease],
933 [HAVE_LIBCHARSET_H=])
934 GIT_CONF_SUBST([HAVE_LIBCHARSET_H])
935 #
936 # Define HAVE_STRINGS_H if you have strings.h
937 AC_CHECK_HEADER([strings.h],
938 [HAVE_STRINGS_H=YesPlease],
939 [HAVE_STRINGS_H=])
940 GIT_CONF_SUBST([HAVE_STRINGS_H])
941 # Define CHARSET_LIB if libiconv does not export the locale_charset symbol
942 # and libcharset does
943 CHARSET_LIB=
944 AC_CHECK_LIB([iconv], [locale_charset],
945 [CHARSET_LIB=-liconv],
946 [AC_CHECK_LIB([charset], [locale_charset],
947 [CHARSET_LIB=-lcharset])])
948 GIT_CONF_SUBST([CHARSET_LIB])
949 #
950 # Define NO_HMAC_CTX_CLEANUP=YesPlease if HMAC_CTX_cleanup is missing.
951 AC_CHECK_LIB([crypto], [HMAC_CTX_cleanup],
952 [], [GIT_CONF_SUBST([NO_HMAC_CTX_CLEANUP], [YesPlease])])
953 #
954 # Define HAVE_CLOCK_GETTIME=YesPlease if clock_gettime is available.
955 GIT_CHECK_FUNC(clock_gettime,
956 [HAVE_CLOCK_GETTIME=YesPlease],
957 [HAVE_CLOCK_GETTIME=])
958 GIT_CONF_SUBST([HAVE_CLOCK_GETTIME])
960 AC_DEFUN([CLOCK_MONOTONIC_SRC], [
961 AC_LANG_PROGRAM([[
962 #include <time.h>
963 clockid_t id = CLOCK_MONOTONIC;
964 ]])])
966 #
967 # Define HAVE_CLOCK_MONOTONIC=YesPlease if CLOCK_MONOTONIC is available.
968 AC_MSG_CHECKING([for CLOCK_MONOTONIC])
969 AC_COMPILE_IFELSE([CLOCK_MONOTONIC_SRC],
970 [AC_MSG_RESULT([yes])
971 HAVE_CLOCK_MONOTONIC=YesPlease],
972 [AC_MSG_RESULT([no])
973 HAVE_CLOCK_MONOTONIC=])
974 GIT_CONF_SUBST([HAVE_CLOCK_MONOTONIC])
975 #
976 # Define NO_SETITIMER if you don't have setitimer.
977 GIT_CHECK_FUNC(setitimer,
978 [NO_SETITIMER=],
979 [NO_SETITIMER=YesPlease])
980 GIT_CONF_SUBST([NO_SETITIMER])
981 #
982 # Define NO_STRCASESTR if you don't have strcasestr.
983 GIT_CHECK_FUNC(strcasestr,
984 [NO_STRCASESTR=],
985 [NO_STRCASESTR=YesPlease])
986 GIT_CONF_SUBST([NO_STRCASESTR])
987 #
988 # Define NO_MEMMEM if you don't have memmem.
989 GIT_CHECK_FUNC(memmem,
990 [NO_MEMMEM=],
991 [NO_MEMMEM=YesPlease])
992 GIT_CONF_SUBST([NO_MEMMEM])
993 #
994 # Define NO_STRLCPY if you don't have strlcpy.
995 GIT_CHECK_FUNC(strlcpy,
996 [NO_STRLCPY=],
997 [NO_STRLCPY=YesPlease])
998 GIT_CONF_SUBST([NO_STRLCPY])
999 #
1000 # Define NO_UINTMAX_T if your platform does not have uintmax_t
1001 AC_CHECK_TYPE(uintmax_t,
1002 [NO_UINTMAX_T=],
1003 [NO_UINTMAX_T=YesPlease],[
1004 #include <inttypes.h>
1005 ])
1006 GIT_CONF_SUBST([NO_UINTMAX_T])
1007 #
1008 # Define NO_STRTOUMAX if you don't have strtoumax in the C library.
1009 GIT_CHECK_FUNC(strtoumax,
1010 [NO_STRTOUMAX=],
1011 [NO_STRTOUMAX=YesPlease])
1012 GIT_CONF_SUBST([NO_STRTOUMAX])
1013 #
1014 # Define NO_SETENV if you don't have setenv in the C library.
1015 GIT_CHECK_FUNC(setenv,
1016 [NO_SETENV=],
1017 [NO_SETENV=YesPlease])
1018 GIT_CONF_SUBST([NO_SETENV])
1019 #
1020 # Define NO_UNSETENV if you don't have unsetenv in the C library.
1021 GIT_CHECK_FUNC(unsetenv,
1022 [NO_UNSETENV=],
1023 [NO_UNSETENV=YesPlease])
1024 GIT_CONF_SUBST([NO_UNSETENV])
1025 #
1026 # Define NO_MKDTEMP if you don't have mkdtemp in the C library.
1027 GIT_CHECK_FUNC(mkdtemp,
1028 [NO_MKDTEMP=],
1029 [NO_MKDTEMP=YesPlease])
1030 GIT_CONF_SUBST([NO_MKDTEMP])
1031 #
1032 # Define NO_MKSTEMPS if you don't have mkstemps in the C library.
1033 GIT_CHECK_FUNC(mkstemps,
1034 [NO_MKSTEMPS=],
1035 [NO_MKSTEMPS=YesPlease])
1036 GIT_CONF_SUBST([NO_MKSTEMPS])
1037 #
1038 # Define NO_INITGROUPS if you don't have initgroups in the C library.
1039 GIT_CHECK_FUNC(initgroups,
1040 [NO_INITGROUPS=],
1041 [NO_INITGROUPS=YesPlease])
1042 GIT_CONF_SUBST([NO_INITGROUPS])
1043 #
1044 #
1045 # Define NO_MMAP if you want to avoid mmap.
1046 #
1047 # Define NO_ICONV if your libc does not properly support iconv.
1049 AC_DEFUN([BSD_SYSCTL_SRC], [
1050 AC_LANG_PROGRAM([[
1051 #include <stddef.h>
1052 #include <sys/types.h>
1053 #include <sys/sysctl.h>
1054 ]],[[
1055 int val, mib[2];
1056 size_t len;
1057 mib[0] = CTL_HW;
1058 mib[1] = 1;
1059 len = sizeof(val);
1060 return sysctl(mib, 2, &val, &len, NULL, 0) ? 1 : 0;
1061 ]])])
1063 #
1064 # Define HAVE_BSD_SYSCTL=YesPlease if a BSD-compatible sysctl function is available.
1065 AC_MSG_CHECKING([for BSD sysctl])
1066 AC_COMPILE_IFELSE([BSD_SYSCTL_SRC],
1067 [AC_MSG_RESULT([yes])
1068 HAVE_BSD_SYSCTL=YesPlease],
1069 [AC_MSG_RESULT([no])
1070 HAVE_BSD_SYSCTL=])
1071 GIT_CONF_SUBST([HAVE_BSD_SYSCTL])
1073 ## Other checks.
1074 # Define USE_PIC if you need the main git objects to be built with -fPIC
1075 # in order to build and link perl/Git.so. x86-64 seems to need this.
1076 #
1077 # Define NO_SYMLINK_HEAD if you never want .git/HEAD to be a symbolic link.
1078 # Enable it on Windows. By default, symrefs are still used.
1079 #
1080 # Define NO_PTHREADS if we do not have pthreads.
1081 #
1082 # Define PTHREAD_LIBS to the linker flag used for Pthread support.
1083 AC_DEFUN([PTHREADTEST_SRC], [
1084 AC_LANG_PROGRAM([[
1085 #include <pthread.h>
1086 ]], [[
1087 pthread_mutex_t test_mutex;
1088 pthread_key_t test_key;
1089 int retcode = 0;
1090 retcode |= pthread_key_create(&test_key, (void *)0);
1091 retcode |= pthread_mutex_init(&test_mutex,(void *)0);
1092 retcode |= pthread_mutex_lock(&test_mutex);
1093 retcode |= pthread_mutex_unlock(&test_mutex);
1094 return retcode;
1095 ]])])
1097 dnl AC_LANG_CONFTEST([AC_LANG_PROGRAM(
1098 dnl [[#include <pthread.h>]],
1099 dnl [[pthread_mutex_t test_mutex;]]
1100 dnl )])
1102 NO_PTHREADS=UnfortunatelyYes
1103 PTHREAD_LIBS=
1105 if test -n "$USER_NOPTHREAD"; then
1106 AC_MSG_NOTICE([Skipping POSIX Threads at user request.])
1107 # handle these separately since PTHREAD_CFLAGS could be '-lpthreads
1108 # -D_REENTRANT' or some such.
1109 elif test -z "$PTHREAD_CFLAGS"; then
1110 threads_found=no
1111 # Attempt to compile and link some code using pthreads to determine
1112 # required linker flags. The order is somewhat important here: We
1113 # first try it without any extra flags, to catch systems where
1114 # pthreads are part of the C library, then go on testing various other
1115 # flags. We do so to avoid false positives. For example, on Mac OS X
1116 # pthreads are part of the C library; moreover, the compiler allows us
1117 # to add "-mt" to the CFLAGS (although it will do nothing except
1118 # trigger a warning about an unused flag). Hence if we checked for
1119 # "-mt" before "" we would end up picking it. But unfortunately this
1120 # would then trigger compiler warnings on every single file we compile.
1121 for opt in "" -mt -pthread -lpthread; do
1122 old_CFLAGS="$CFLAGS"
1123 CFLAGS="$opt $CFLAGS"
1124 AC_MSG_CHECKING([for POSIX Threads with '$opt'])
1125 AC_LINK_IFELSE([PTHREADTEST_SRC],
1126 [AC_MSG_RESULT([yes])
1127 NO_PTHREADS=
1128 PTHREAD_LIBS="$opt"
1129 PTHREAD_CFLAGS="$opt"
1130 threads_found=yes
1131 break
1132 ],
1133 [AC_MSG_RESULT([no])])
1134 CFLAGS="$old_CFLAGS"
1135 done
1136 if test $threads_found != yes; then
1137 AC_CHECK_LIB([pthread], [pthread_create],
1138 [PTHREAD_LIBS="-lpthread"],
1139 [NO_PTHREADS=UnfortunatelyYes])
1140 fi
1141 else
1142 old_CFLAGS="$CFLAGS"
1143 CFLAGS="$PTHREAD_CFLAGS $CFLAGS"
1144 AC_MSG_CHECKING([for POSIX Threads with '$PTHREAD_CFLAGS'])
1145 AC_LINK_IFELSE([PTHREADTEST_SRC],
1146 [AC_MSG_RESULT([yes])
1147 NO_PTHREADS=
1148 PTHREAD_LIBS="$PTHREAD_CFLAGS"
1149 ],
1150 [AC_MSG_RESULT([no])])
1152 CFLAGS="$old_CFLAGS"
1153 fi
1155 CFLAGS="$old_CFLAGS"
1157 GIT_CONF_SUBST([PTHREAD_CFLAGS])
1158 GIT_CONF_SUBST([PTHREAD_LIBS])
1159 GIT_CONF_SUBST([NO_PTHREADS])
1161 ## Output files
1162 AC_CONFIG_FILES(["${config_file}":"${config_in}"])
1163 AC_OUTPUT