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 # Define SHELL_PATH to provide path to shell.
251 GIT_ARG_SET_PATH(shell)
252 #
253 # Define PERL_PATH to provide path to Perl.
254 GIT_ARG_SET_PATH(perl)
255 #
256 # Define ZLIB_PATH to provide path to zlib.
257 GIT_ARG_SET_PATH(zlib)
258 #
259 # Declare the with-tcltk/without-tcltk options.
260 AC_ARG_WITH(tcltk,
261 AS_HELP_STRING([--with-tcltk],[use Tcl/Tk GUI (default is YES)])
262 AS_HELP_STRING([],[ARG is the full path to the Tcl/Tk interpreter.])
263 AS_HELP_STRING([],[Bare --with-tcltk will make the GUI part only if])
264 AS_HELP_STRING([],[Tcl/Tk interpreter will be found in a system.]),\
265 GIT_PARSE_WITH(tcltk))
266 #
269 ## Checks for programs.
270 AC_MSG_NOTICE([CHECKS for programs])
271 #
272 AC_PROG_CC([cc gcc])
273 # which switch to pass runtime path to dynamic libraries to the linker
274 AC_CACHE_CHECK([if linker supports -R], git_cv_ld_dashr, [
275 SAVE_LDFLAGS="${LDFLAGS}"
276 LDFLAGS="${SAVE_LDFLAGS} -R /"
277 AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [git_cv_ld_dashr=yes], [git_cv_ld_dashr=no])
278 LDFLAGS="${SAVE_LDFLAGS}"
279 ])
280 if test "$git_cv_ld_dashr" = "yes"; then
281 AC_SUBST(CC_LD_DYNPATH, [-R])
282 else
283 AC_CACHE_CHECK([if linker supports -Wl,-rpath,], git_cv_ld_wl_rpath, [
284 SAVE_LDFLAGS="${LDFLAGS}"
285 LDFLAGS="${SAVE_LDFLAGS} -Wl,-rpath,/"
286 AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [git_cv_ld_wl_rpath=yes], [git_cv_ld_wl_rpath=no])
287 LDFLAGS="${SAVE_LDFLAGS}"
288 ])
289 if test "$git_cv_ld_wl_rpath" = "yes"; then
290 AC_SUBST(CC_LD_DYNPATH, [-Wl,-rpath,])
291 else
292 AC_CACHE_CHECK([if linker supports -rpath], git_cv_ld_rpath, [
293 SAVE_LDFLAGS="${LDFLAGS}"
294 LDFLAGS="${SAVE_LDFLAGS} -rpath /"
295 AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [git_cv_ld_rpath=yes], [git_cv_ld_rpath=no])
296 LDFLAGS="${SAVE_LDFLAGS}"
297 ])
298 if test "$git_cv_ld_rpath" = "yes"; then
299 AC_SUBST(CC_LD_DYNPATH, [-rpath])
300 else
301 AC_MSG_WARN([linker does not support runtime path to dynamic libraries])
302 fi
303 fi
304 fi
305 #AC_PROG_INSTALL # needs install-sh or install.sh in sources
306 AC_CHECK_TOOLS(AR, [gar ar], :)
307 AC_CHECK_PROGS(TAR, [gtar tar])
308 # TCLTK_PATH will be set to some value if we want Tcl/Tk
309 # or will be empty otherwise.
310 if test -z "$NO_TCLTK"; then
311 if test "$with_tcltk" = ""; then
312 # No Tcl/Tk switches given. Do not check for Tcl/Tk, use bare 'wish'.
313 TCLTK_PATH=wish
314 AC_SUBST(TCLTK_PATH)
315 elif test "$with_tcltk" = "yes"; then
316 # Tcl/Tk check requested.
317 AC_CHECK_PROGS(TCLTK_PATH, [wish], )
318 else
319 AC_MSG_RESULT([Using Tcl/Tk interpreter $with_tcltk])
320 TCLTK_PATH="$with_tcltk"
321 AC_SUBST(TCLTK_PATH)
322 fi
323 fi
324 AC_CHECK_PROGS(ASCIIDOC, [asciidoc])
325 if test -n "$ASCIIDOC"; then
326 AC_MSG_CHECKING([for asciidoc version])
327 asciidoc_version=`$ASCIIDOC --version 2>/dev/null`
328 case "${asciidoc_version}" in
329 asciidoc' '8*)
330 ASCIIDOC8=YesPlease
331 AC_MSG_RESULT([${asciidoc_version} > 7])
332 ;;
333 asciidoc' '7*)
334 ASCIIDOC8=
335 AC_MSG_RESULT([${asciidoc_version}])
336 ;;
337 *)
338 ASCIIDOC8=
339 AC_MSG_RESULT([${asciidoc_version} (unknown)])
340 ;;
341 esac
342 fi
343 AC_SUBST(ASCIIDOC8)
346 ## Checks for libraries.
347 AC_MSG_NOTICE([CHECKS for libraries])
348 #
349 # Define NO_OPENSSL environment variable if you do not have OpenSSL.
350 # Define NEEDS_SSL_WITH_CRYPTO if you need -lcrypto with -lssl (Darwin).
352 GIT_STASH_FLAGS($OPENSSLDIR)
354 AC_CHECK_LIB([crypto], [SHA1_Init],
355 [NEEDS_SSL_WITH_CRYPTO=],
356 [AC_CHECK_LIB([ssl], [SHA1_Init],
357 [NEEDS_SSL_WITH_CRYPTO=YesPlease],
358 [NEEDS_SSL_WITH_CRYPTO= NO_OPENSSL=YesPlease])])
360 GIT_UNSTASH_FLAGS($OPENSSLDIR)
362 AC_SUBST(NEEDS_SSL_WITH_CRYPTO)
363 AC_SUBST(NO_OPENSSL)
365 #
366 # Define NO_CURL if you do not have libcurl installed. git-http-pull and
367 # git-http-push are not built, and you cannot use http:// and https://
368 # transports.
370 GIT_STASH_FLAGS($CURLDIR)
372 AC_CHECK_LIB([curl], [curl_global_init],
373 [NO_CURL=],
374 [NO_CURL=YesPlease])
376 GIT_UNSTASH_FLAGS($CURLDIR)
378 AC_SUBST(NO_CURL)
380 #
381 # Define NO_EXPAT if you do not have expat installed. git-http-push is
382 # not built, and you cannot push using http:// and https:// transports.
384 GIT_STASH_FLAGS($EXPATDIR)
386 AC_CHECK_LIB([expat], [XML_ParserCreate],
387 [NO_EXPAT=],
388 [NO_EXPAT=YesPlease])
390 GIT_UNSTASH_FLAGS($EXPATDIR)
392 AC_SUBST(NO_EXPAT)
394 #
395 # Define NEEDS_LIBICONV if linking with libc is not enough (Darwin and
396 # some Solaris installations).
397 # Define NO_ICONV if neither libc nor libiconv support iconv.
399 if test -z "$NO_ICONV"; then
401 GIT_STASH_FLAGS($ICONVDIR)
403 AC_DEFUN([ICONVTEST_SRC], [
404 #include <iconv.h>
406 int main(void)
407 {
408 iconv_open("", "");
409 return 0;
410 }
411 ])
413 if test -n "$ICONVDIR"; then
414 lib_order="-liconv -lc"
415 else
416 lib_order="-lc -liconv"
417 fi
419 NO_ICONV=YesPlease
421 for l in $lib_order; do
422 if test "$l" = "-liconv"; then
423 NEEDS_LIBICONV=YesPlease
424 else
425 NEEDS_LIBICONV=
426 fi
428 old_LIBS="$LIBS"
429 LIBS="$LIBS $l"
430 AC_MSG_CHECKING([for iconv in $l])
431 AC_LINK_IFELSE(ICONVTEST_SRC,
432 [AC_MSG_RESULT([yes])
433 NO_ICONV=
434 break],
435 [AC_MSG_RESULT([no])])
436 LIBS="$old_LIBS"
437 done
439 #in case of break
440 LIBS="$old_LIBS"
442 GIT_UNSTASH_FLAGS($ICONVDIR)
444 AC_SUBST(NEEDS_LIBICONV)
445 AC_SUBST(NO_ICONV)
447 if test -n "$NO_ICONV"; then
448 NEEDS_LIBICONV=
449 fi
451 fi
453 #
454 # Define NO_DEFLATE_BOUND if deflateBound is missing from zlib.
456 GIT_STASH_FLAGS($ZLIB_PATH)
458 AC_DEFUN([ZLIBTEST_SRC], [
459 #include <zlib.h>
461 int main(void)
462 {
463 deflateBound(0, 0);
464 return 0;
465 }
466 ])
467 AC_MSG_CHECKING([for deflateBound in -lz])
468 old_LIBS="$LIBS"
469 LIBS="$LIBS -lz"
470 AC_LINK_IFELSE(ZLIBTEST_SRC,
471 [AC_MSG_RESULT([yes])],
472 [AC_MSG_RESULT([no])
473 NO_DEFLATE_BOUND=yes])
474 LIBS="$old_LIBS"
476 GIT_UNSTASH_FLAGS($ZLIB_PATH)
478 AC_SUBST(NO_DEFLATE_BOUND)
480 #
481 # Define NEEDS_SOCKET if linking with libc is not enough (SunOS,
482 # Patrick Mauritz).
483 AC_CHECK_LIB([c], [socket],
484 [NEEDS_SOCKET=],
485 [NEEDS_SOCKET=YesPlease])
486 AC_SUBST(NEEDS_SOCKET)
487 test -n "$NEEDS_SOCKET" && LIBS="$LIBS -lsocket"
489 #
490 # Define NEEDS_RESOLV if linking with -lnsl and/or -lsocket is not enough.
491 # Notably on Solaris hstrerror resides in libresolv and on Solaris 7
492 # inet_ntop and inet_pton additionally reside there.
493 AC_CHECK_LIB([c], [hstrerror],
494 [NEEDS_RESOLV=],
495 [NEEDS_RESOLV=YesPlease])
496 AC_SUBST(NEEDS_RESOLV)
497 test -n "$NEEDS_RESOLV" && LIBS="$LIBS -lresolv"
499 AC_CHECK_LIB([c], [basename],
500 [NEEDS_LIBGEN=],
501 [NEEDS_LIBGEN=YesPlease])
502 AC_SUBST(NEEDS_LIBGEN)
503 test -n "$NEEDS_LIBGEN" && LIBS="$LIBS -lgen"
505 ## Checks for header files.
506 AC_MSG_NOTICE([CHECKS for header files])
507 #
508 # Define NO_SYS_SELECT_H if you don't have sys/select.h.
509 AC_CHECK_HEADER([sys/select.h],
510 [NO_SYS_SELECT_H=],
511 [NO_SYS_SELECT_H=UnfortunatelyYes])
512 AC_SUBST(NO_SYS_SELECT_H)
513 #
514 # Define OLD_ICONV if your library has an old iconv(), where the second
515 # (input buffer pointer) parameter is declared with type (const char **).
516 AC_DEFUN([OLDICONVTEST_SRC], [[
517 #include <iconv.h>
519 extern size_t iconv(iconv_t cd,
520 char **inbuf, size_t *inbytesleft,
521 char **outbuf, size_t *outbytesleft);
523 int main(void)
524 {
525 return 0;
526 }
527 ]])
529 GIT_STASH_FLAGS($ICONVDIR)
531 AC_MSG_CHECKING([for old iconv()])
532 AC_COMPILE_IFELSE(OLDICONVTEST_SRC,
533 [AC_MSG_RESULT([no])],
534 [AC_MSG_RESULT([yes])
535 OLD_ICONV=UnfortunatelyYes])
537 GIT_UNSTASH_FLAGS($ICONVDIR)
539 AC_SUBST(OLD_ICONV)
541 ## Checks for typedefs, structures, and compiler characteristics.
542 AC_MSG_NOTICE([CHECKS for typedefs, structures, and compiler characteristics])
543 #
544 # Define NO_D_INO_IN_DIRENT if you don't have d_ino in your struct dirent.
545 AC_CHECK_MEMBER(struct dirent.d_ino,
546 [NO_D_INO_IN_DIRENT=],
547 [NO_D_INO_IN_DIRENT=YesPlease],
548 [#include <dirent.h>])
549 AC_SUBST(NO_D_INO_IN_DIRENT)
550 #
551 # Define NO_D_TYPE_IN_DIRENT if your platform defines DT_UNKNOWN but lacks
552 # d_type in struct dirent (latest Cygwin -- will be fixed soonish).
553 AC_CHECK_MEMBER(struct dirent.d_type,
554 [NO_D_TYPE_IN_DIRENT=],
555 [NO_D_TYPE_IN_DIRENT=YesPlease],
556 [#include <dirent.h>])
557 AC_SUBST(NO_D_TYPE_IN_DIRENT)
558 #
559 # Define NO_SOCKADDR_STORAGE if your platform does not have struct
560 # sockaddr_storage.
561 AC_CHECK_TYPE(struct sockaddr_storage,
562 [NO_SOCKADDR_STORAGE=],
563 [NO_SOCKADDR_STORAGE=YesPlease],[
564 #include <sys/types.h>
565 #include <sys/socket.h>
566 ])
567 AC_SUBST(NO_SOCKADDR_STORAGE)
568 #
569 # Define NO_IPV6 if you lack IPv6 support and getaddrinfo().
570 AC_CHECK_TYPE([struct addrinfo],[
571 GIT_CHECK_FUNC([getaddrinfo],
572 [NO_IPV6=],
573 [NO_IPV6=YesPlease])
574 ],[NO_IPV6=YesPlease],[
575 #include <sys/types.h>
576 #include <sys/socket.h>
577 #include <netdb.h>
578 ])
579 AC_SUBST(NO_IPV6)
580 #
581 # Define NO_C99_FORMAT if your formatted IO functions (printf/scanf et.al.)
582 # do not support the 'size specifiers' introduced by C99, namely ll, hh,
583 # j, z, t. (representing long long int, char, intmax_t, size_t, ptrdiff_t).
584 # some C compilers supported these specifiers prior to C99 as an extension.
585 AC_CACHE_CHECK([whether formatted IO functions support C99 size specifiers],
586 [ac_cv_c_c99_format],
587 [# Actually git uses only %z (%zu) in alloc.c, and %t (%td) in mktag.c
588 AC_RUN_IFELSE(
589 [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
590 [[char buf[64];
591 if (sprintf(buf, "%lld%hhd%jd%zd%td", (long long int)1, (char)2, (intmax_t)3, (size_t)4, (ptrdiff_t)5) != 5)
592 return 1;
593 else if (strcmp(buf, "12345"))
594 return 2;]])],
595 [ac_cv_c_c99_format=yes],
596 [ac_cv_c_c99_format=no])
597 ])
598 if test $ac_cv_c_c99_format = no; then
599 NO_C99_FORMAT=YesPlease
600 else
601 NO_C99_FORMAT=
602 fi
603 AC_SUBST(NO_C99_FORMAT)
604 #
605 # Define FREAD_READS_DIRECTORIES if your are on a system which succeeds
606 # when attempting to read from an fopen'ed directory.
607 AC_CACHE_CHECK([whether system succeeds to read fopen'ed directory],
608 [ac_cv_fread_reads_directories],
609 [
610 AC_RUN_IFELSE(
611 [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
612 [[char c;
613 FILE *f = fopen(".", "r");
614 return f && fread(&c, 1, 1, f)]])],
615 [ac_cv_fread_reads_directories=no],
616 [ac_cv_fread_reads_directories=yes])
617 ])
618 if test $ac_cv_fread_reads_directories = yes; then
619 FREAD_READS_DIRECTORIES=UnfortunatelyYes
620 else
621 FREAD_READS_DIRECTORIES=
622 fi
623 AC_SUBST(FREAD_READS_DIRECTORIES)
624 #
625 # Define SNPRINTF_RETURNS_BOGUS if your are on a system which snprintf()
626 # or vsnprintf() return -1 instead of number of characters which would
627 # have been written to the final string if enough space had been available.
628 AC_CACHE_CHECK([whether snprintf() and/or vsnprintf() return bogus value],
629 [ac_cv_snprintf_returns_bogus],
630 [
631 AC_RUN_IFELSE(
632 [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT
633 #include "stdarg.h"
635 int test_vsnprintf(char *str, size_t maxsize, const char *format, ...)
636 {
637 int ret;
638 va_list ap;
639 va_start(ap, format);
640 ret = vsnprintf(str, maxsize, format, ap);
641 va_end(ap);
642 return ret;
643 }],
644 [[char buf[6];
645 if (test_vsnprintf(buf, 3, "%s", "12345") != 5
646 || strcmp(buf, "12")) return 1;
647 if (snprintf(buf, 3, "%s", "12345") != 5
648 || strcmp(buf, "12")) return 1]])],
649 [ac_cv_snprintf_returns_bogus=no],
650 [ac_cv_snprintf_returns_bogus=yes])
651 ])
652 if test $ac_cv_snprintf_returns_bogus = yes; then
653 SNPRINTF_RETURNS_BOGUS=UnfortunatelyYes
654 else
655 SNPRINTF_RETURNS_BOGUS=
656 fi
657 AC_SUBST(SNPRINTF_RETURNS_BOGUS)
660 ## Checks for library functions.
661 ## (in default C library and libraries checked by AC_CHECK_LIB)
662 AC_MSG_NOTICE([CHECKS for library functions])
663 #
664 # Define NO_LIBGEN_H if you don't have libgen.h.
665 AC_CHECK_HEADER([libgen.h],
666 [NO_LIBGEN_H=],
667 [NO_LIBGEN_H=YesPlease])
668 AC_SUBST(NO_LIBGEN_H)
669 #
670 # Define NO_STRCASESTR if you don't have strcasestr.
671 GIT_CHECK_FUNC(strcasestr,
672 [NO_STRCASESTR=],
673 [NO_STRCASESTR=YesPlease])
674 AC_SUBST(NO_STRCASESTR)
675 #
676 # Define NO_MEMMEM if you don't have memmem.
677 GIT_CHECK_FUNC(memmem,
678 [NO_MEMMEM=],
679 [NO_MEMMEM=YesPlease])
680 AC_SUBST(NO_MEMMEM)
681 #
682 # Define NO_STRLCPY if you don't have strlcpy.
683 GIT_CHECK_FUNC(strlcpy,
684 [NO_STRLCPY=],
685 [NO_STRLCPY=YesPlease])
686 AC_SUBST(NO_STRLCPY)
687 #
688 # Define NO_UINTMAX_T if your platform does not have uintmax_t
689 AC_CHECK_TYPE(uintmax_t,
690 [NO_UINTMAX_T=],
691 [NO_UINTMAX_T=YesPlease],[
692 #include <inttypes.h>
693 ])
694 AC_SUBST(NO_UINTMAX_T)
695 #
696 # Define NO_STRTOUMAX if you don't have strtoumax in the C library.
697 GIT_CHECK_FUNC(strtoumax,
698 [NO_STRTOUMAX=],
699 [NO_STRTOUMAX=YesPlease])
700 AC_SUBST(NO_STRTOUMAX)
701 #
702 # Define NO_SETENV if you don't have setenv in the C library.
703 GIT_CHECK_FUNC(setenv,
704 [NO_SETENV=],
705 [NO_SETENV=YesPlease])
706 AC_SUBST(NO_SETENV)
707 #
708 # Define NO_UNSETENV if you don't have unsetenv in the C library.
709 GIT_CHECK_FUNC(unsetenv,
710 [NO_UNSETENV=],
711 [NO_UNSETENV=YesPlease])
712 AC_SUBST(NO_UNSETENV)
713 #
714 # Define NO_MKDTEMP if you don't have mkdtemp in the C library.
715 GIT_CHECK_FUNC(mkdtemp,
716 [NO_MKDTEMP=],
717 [NO_MKDTEMP=YesPlease])
718 AC_SUBST(NO_MKDTEMP)
719 #
720 # Define NO_MKSTEMPS if you don't have mkstemps in the C library.
721 GIT_CHECK_FUNC(mkstemps,
722 [NO_MKSTEMPS=],
723 [NO_MKSTEMPS=YesPlease])
724 AC_SUBST(NO_MKSTEMPS)
725 #
726 #
727 # Define NO_MMAP if you want to avoid mmap.
728 #
729 # Define NO_ICONV if your libc does not properly support iconv.
732 ## Other checks.
733 # Define USE_PIC if you need the main git objects to be built with -fPIC
734 # in order to build and link perl/Git.so. x86-64 seems to need this.
735 #
736 # Define NO_SYMLINK_HEAD if you never want .git/HEAD to be a symbolic link.
737 # Enable it on Windows. By default, symrefs are still used.
738 #
739 # Define NO_PTHREADS if we do not have pthreads
740 #
741 # Define PTHREAD_LIBS to the linker flag used for Pthread support and define
742 # THREADED_DELTA_SEARCH if Pthreads are available.
743 AC_DEFUN([PTHREADTEST_SRC], [
744 #include <pthread.h>
746 int main(void)
747 {
748 pthread_mutex_t test_mutex;
749 return (0);
750 }
751 ])
753 dnl AC_LANG_CONFTEST([AC_LANG_PROGRAM(
754 dnl [[#include <pthread.h>]],
755 dnl [[pthread_mutex_t test_mutex;]]
756 dnl )])
758 NO_PTHREADS=UnfortunatelyYes
759 THREADED_DELTA_SEARCH=
760 PTHREAD_LIBS=
762 if test -n "$USER_NOPTHREAD"; then
763 AC_MSG_NOTICE([Skipping POSIX Threads at user request.])
764 # handle these separately since PTHREAD_CFLAGS could be '-lpthreads
765 # -D_REENTRANT' or some such.
766 elif test -z "$PTHREAD_CFLAGS"; then
767 for opt in -pthread -lpthread; do
768 old_CFLAGS="$CFLAGS"
769 CFLAGS="$opt $CFLAGS"
770 AC_MSG_CHECKING([Checking for POSIX Threads with '$opt'])
771 AC_LINK_IFELSE(PTHREADTEST_SRC,
772 [AC_MSG_RESULT([yes])
773 NO_PTHREADS=
774 PTHREAD_LIBS="$opt"
775 THREADED_DELTA_SEARCH=YesPlease
776 break
777 ],
778 [AC_MSG_RESULT([no])])
779 CFLAGS="$old_CFLAGS"
780 done
781 else
782 old_CFLAGS="$CFLAGS"
783 CFLAGS="$PTHREAD_CFLAGS $CFLAGS"
784 AC_MSG_CHECKING([Checking for POSIX Threads with '$PTHREAD_CFLAGS'])
785 AC_LINK_IFELSE(PTHREADTEST_SRC,
786 [AC_MSG_RESULT([yes])
787 NO_PTHREADS=
788 PTHREAD_LIBS="$PTHREAD_CFLAGS"
789 THREADED_DELTA_SEARCH=YesPlease
790 ],
791 [AC_MSG_RESULT([no])])
793 CFLAGS="$old_CFLAGS"
794 fi
796 CFLAGS="$old_CFLAGS"
798 AC_SUBST(PTHREAD_LIBS)
799 AC_SUBST(NO_PTHREADS)
800 AC_SUBST(THREADED_DELTA_SEARCH)
802 ## Output files
803 AC_CONFIG_FILES(["${config_file}":"${config_in}":"${config_append}"])
804 AC_OUTPUT
807 ## Cleanup
808 rm -f "${config_append}"