Merge branch 'do/maint-merge-recursive-fix' into maint
[git/git.git] / configure.ac
1 # -*- Autoconf -*-
2 # Process this file with autoconf to produce a configure script.
3
4 AC_PREREQ(2.59)
5 AC_INIT([git], [@@GIT_VERSION@@], [git@vger.kernel.org])
6
7 AC_CONFIG_SRCDIR([git.c])
8
9 config_file=config.mak.autogen
10 config_append=config.mak.append
11 config_in=config.mak.in
12
13 echo "# ${config_append}. Generated by configure." > "${config_append}"
14
15
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 dnl
73 dnl GIT_CHECK_FUNC(FUNCTION, IFTRUE, IFFALSE)
74 dnl -----------------------------------------
75 dnl Similar to AC_CHECK_FUNC, but on systems that do not generate
76 dnl warnings for missing prototypes (e.g. FreeBSD when compiling without
77 dnl -Wall), it does not work. By looking for function definition in
78 dnl libraries, this problem can be worked around.
79 AC_DEFUN([GIT_CHECK_FUNC],[AC_CHECK_FUNC([$1],[
80 AC_SEARCH_LIBS([$1],,
81 [$2],[$3])
82 ],[$3])])
83
84 dnl
85 dnl GIT_STASH_FLAGS(BASEPATH_VAR)
86 dnl -----------------------------
87 dnl Allow for easy stashing of LDFLAGS and CPPFLAGS before running
88 dnl tests that may want to take user settings into account.
89 AC_DEFUN([GIT_STASH_FLAGS],[
90 if test -n "$1"; then
91 old_CPPFLAGS="$CPPFLAGS"
92 old_LDFLAGS="$LDFLAGS"
93 CPPFLAGS="-I$1/include $CPPFLAGS"
94 LDFLAGS="-L$1/$lib $LDFLAGS"
95 fi
96 ])
97
98 dnl
99 dnl GIT_UNSTASH_FLAGS(BASEPATH_VAR)
100 dnl -----------------------------
101 dnl Restore the stashed *FLAGS values.
102 AC_DEFUN([GIT_UNSTASH_FLAGS],[
103 if test -n "$1"; then
104 CPPFLAGS="$old_CPPFLAGS"
105 LDFLAGS="$old_LDFLAGS"
106 fi
107 ])
108
109 ## Site configuration related to programs (before tests)
110 ## --with-PACKAGE[=ARG] and --without-PACKAGE
111 #
112 # Set lib to alternative name of lib directory (e.g. lib64)
113 AC_ARG_WITH([lib],
114 [AS_HELP_STRING([--with-lib=ARG],
115 [ARG specifies alternative name for lib directory])],
116 [if test "$withval" = "no" || test "$withval" = "yes"; then \
117 AC_MSG_WARN([You should provide name for --with-lib=ARG]); \
118 else \
119 lib=$withval; \
120 AC_MSG_NOTICE([Setting lib to '$lib']); \
121 GIT_CONF_APPEND_LINE(lib=$withval); \
122 fi; \
123 ],[])
124
125 if test -z "$lib"; then
126 AC_MSG_NOTICE([Setting lib to 'lib' (the default)])
127 lib=lib
128 fi
129
130 AC_ARG_ENABLE([pthreads],
131 [AS_HELP_STRING([--enable-pthreads=FLAGS],
132 [FLAGS is the value to pass to the compiler to enable POSIX Threads.]
133 [The default if FLAGS is not specified is to try first -pthread]
134 [and then -lpthread.]
135 [--without-pthreads will disable threading.])],
136 [
137 if test "x$enableval" = "xyes"; then
138 AC_MSG_NOTICE([Will try -pthread then -lpthread to enable POSIX Threads])
139 elif test "x$enableval" != "xno"; then
140 PTHREAD_CFLAGS=$enableval
141 AC_MSG_NOTICE([Setting '$PTHREAD_CFLAGS' as the FLAGS to enable POSIX Threads])
142 else
143 AC_MSG_NOTICE([POSIX Threads will be disabled.])
144 NO_PTHREADS=YesPlease
145 USER_NOPTHREAD=1
146 fi],
147 [
148 AC_MSG_NOTICE([Will try -pthread then -lpthread to enable POSIX Threads.])
149 ])
150
151 ## Site configuration (override autodetection)
152 ## --with-PACKAGE[=ARG] and --without-PACKAGE
153 AC_MSG_NOTICE([CHECKS for site configuration])
154 #
155 # Define NO_SVN_TESTS if you want to skip time-consuming SVN interoperability
156 # tests. These tests take up a significant amount of the total test time
157 # but are not needed unless you plan to talk to SVN repos.
158 #
159 # Define MOZILLA_SHA1 environment variable when running make to make use of
160 # a bundled SHA1 routine coming from Mozilla. It is GPL'd and should be fast
161 # on non-x86 architectures (e.g. PowerPC), while the OpenSSL version (default
162 # choice) has very fast version optimized for i586.
163 #
164 # Define PPC_SHA1 environment variable when running make to make use of
165 # a bundled SHA1 routine optimized for PowerPC.
166 #
167 # Define ARM_SHA1 environment variable when running make to make use of
168 # a bundled SHA1 routine optimized for ARM.
169 #
170 # Define NO_OPENSSL environment variable if you do not have OpenSSL.
171 # This also implies MOZILLA_SHA1.
172 #
173 # Define OPENSSLDIR=/foo/bar if your openssl header and library files are in
174 # /foo/bar/include and /foo/bar/lib directories.
175 AC_ARG_WITH(openssl,
176 AS_HELP_STRING([--with-openssl],[use OpenSSL library (default is YES)])
177 AS_HELP_STRING([], [ARG can be prefix for openssl library and headers]),\
178 GIT_PARSE_WITH(openssl))
179 #
180 # Define NO_CURL if you do not have curl installed. git-http-pull and
181 # git-http-push are not built, and you cannot use http:// and https://
182 # transports.
183 #
184 # Define CURLDIR=/foo/bar if your curl header and library files are in
185 # /foo/bar/include and /foo/bar/lib directories.
186 AC_ARG_WITH(curl,
187 AS_HELP_STRING([--with-curl],[support http(s):// transports (default is YES)])
188 AS_HELP_STRING([], [ARG can be also prefix for curl library and headers]),
189 GIT_PARSE_WITH(curl))
190 #
191 # Define NO_EXPAT if you do not have expat installed. git-http-push is
192 # not built, and you cannot push using http:// and https:// transports.
193 #
194 # Define EXPATDIR=/foo/bar if your expat header and library files are in
195 # /foo/bar/include and /foo/bar/lib directories.
196 AC_ARG_WITH(expat,
197 AS_HELP_STRING([--with-expat],
198 [support git-push using http:// and https:// transports via WebDAV (default is YES)])
199 AS_HELP_STRING([], [ARG can be also prefix for expat library and headers]),
200 GIT_PARSE_WITH(expat))
201 #
202 # Define NO_FINK if you are building on Darwin/Mac OS X, have Fink
203 # installed in /sw, but don't want GIT to link against any libraries
204 # installed there. If defined you may specify your own (or Fink's)
205 # include directories and library directories by defining CFLAGS
206 # and LDFLAGS appropriately.
207 #
208 # Define NO_DARWIN_PORTS if you are building on Darwin/Mac OS X,
209 # have DarwinPorts installed in /opt/local, but don't want GIT to
210 # link against any libraries installed there. If defined you may
211 # specify your own (or DarwinPort's) include directories and
212 # library directories by defining CFLAGS and LDFLAGS appropriately.
213 #
214 # Define NO_MMAP if you want to avoid mmap.
215 #
216 # Define NO_ICONV if your libc does not properly support iconv.
217 AC_ARG_WITH(iconv,
218 AS_HELP_STRING([--without-iconv],
219 [if your architecture doesn't properly support iconv])
220 AS_HELP_STRING([--with-iconv=PATH],
221 [PATH is prefix for libiconv library and headers])
222 AS_HELP_STRING([],
223 [used only if you need linking with libiconv]),
224 GIT_PARSE_WITH(iconv))
225
226 ## --enable-FEATURE[=ARG] and --disable-FEATURE
227 #
228 # Define USE_NSEC below if you want git to care about sub-second file mtimes
229 # and ctimes. Note that you need recent glibc (at least 2.2.4) for this, and
230 # it will BREAK YOUR LOCAL DIFFS! show-diff and anything using it will likely
231 # randomly break unless your underlying filesystem supports those sub-second
232 # times (my ext3 doesn't).
233 #
234 # Define USE_STDEV below if you want git to care about the underlying device
235 # change being considered an inode change from the update-index perspective.
236
237 #
238 # Define SHELL_PATH to provide path to shell.
239 GIT_ARG_SET_PATH(shell)
240 #
241 # Define PERL_PATH to provide path to Perl.
242 GIT_ARG_SET_PATH(perl)
243 #
244 # Define ZLIB_PATH to provide path to zlib.
245 GIT_ARG_SET_PATH(zlib)
246 #
247 # Declare the with-tcltk/without-tcltk options.
248 AC_ARG_WITH(tcltk,
249 AS_HELP_STRING([--with-tcltk],[use Tcl/Tk GUI (default is YES)])
250 AS_HELP_STRING([],[ARG is the full path to the Tcl/Tk interpreter.])
251 AS_HELP_STRING([],[Bare --with-tcltk will make the GUI part only if])
252 AS_HELP_STRING([],[Tcl/Tk interpreter will be found in a system.]),\
253 GIT_PARSE_WITH(tcltk))
254 #
255
256
257 ## Checks for programs.
258 AC_MSG_NOTICE([CHECKS for programs])
259 #
260 AC_PROG_CC([cc gcc])
261 # which switch to pass runtime path to dynamic libraries to the linker
262 AC_CACHE_CHECK([if linker supports -R], git_cv_ld_dashr, [
263 SAVE_LDFLAGS="${LDFLAGS}"
264 LDFLAGS="${SAVE_LDFLAGS} -R /"
265 AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [git_cv_ld_dashr=yes], [git_cv_ld_dashr=no])
266 LDFLAGS="${SAVE_LDFLAGS}"
267 ])
268 if test "$git_cv_ld_dashr" = "yes"; then
269 AC_SUBST(CC_LD_DYNPATH, [-R])
270 else
271 AC_CACHE_CHECK([if linker supports -Wl,-rpath,], git_cv_ld_wl_rpath, [
272 SAVE_LDFLAGS="${LDFLAGS}"
273 LDFLAGS="${SAVE_LDFLAGS} -Wl,-rpath,/"
274 AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [git_cv_ld_wl_rpath=yes], [git_cv_ld_wl_rpath=no])
275 LDFLAGS="${SAVE_LDFLAGS}"
276 ])
277 if test "$git_cv_ld_wl_rpath" = "yes"; then
278 AC_SUBST(CC_LD_DYNPATH, [-Wl,-rpath,])
279 else
280 AC_CACHE_CHECK([if linker supports -rpath], git_cv_ld_rpath, [
281 SAVE_LDFLAGS="${LDFLAGS}"
282 LDFLAGS="${SAVE_LDFLAGS} -rpath /"
283 AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [git_cv_ld_rpath=yes], [git_cv_ld_rpath=no])
284 LDFLAGS="${SAVE_LDFLAGS}"
285 ])
286 if test "$git_cv_ld_rpath" = "yes"; then
287 AC_SUBST(CC_LD_DYNPATH, [-rpath])
288 else
289 AC_MSG_WARN([linker does not support runtime path to dynamic libraries])
290 fi
291 fi
292 fi
293 #AC_PROG_INSTALL # needs install-sh or install.sh in sources
294 AC_CHECK_TOOLS(AR, [gar ar], :)
295 AC_CHECK_PROGS(TAR, [gtar tar])
296 # TCLTK_PATH will be set to some value if we want Tcl/Tk
297 # or will be empty otherwise.
298 if test -z "$NO_TCLTK"; then
299 if test "$with_tcltk" = ""; then
300 # No Tcl/Tk switches given. Do not check for Tcl/Tk, use bare 'wish'.
301 TCLTK_PATH=wish
302 AC_SUBST(TCLTK_PATH)
303 elif test "$with_tcltk" = "yes"; then
304 # Tcl/Tk check requested.
305 AC_CHECK_PROGS(TCLTK_PATH, [wish], )
306 else
307 AC_MSG_RESULT([Using Tcl/Tk interpreter $with_tcltk])
308 TCLTK_PATH="$with_tcltk"
309 AC_SUBST(TCLTK_PATH)
310 fi
311 fi
312 AC_CHECK_PROGS(ASCIIDOC, [asciidoc])
313 if test -n "$ASCIIDOC"; then
314 AC_MSG_CHECKING([for asciidoc version])
315 asciidoc_version=`$ASCIIDOC --version 2>/dev/null`
316 case "${asciidoc_version}" in
317 asciidoc' '8*)
318 ASCIIDOC8=YesPlease
319 AC_MSG_RESULT([${asciidoc_version} > 7])
320 ;;
321 asciidoc' '7*)
322 ASCIIDOC8=
323 AC_MSG_RESULT([${asciidoc_version}])
324 ;;
325 *)
326 ASCIIDOC8=
327 AC_MSG_RESULT([${asciidoc_version} (unknown)])
328 ;;
329 esac
330 fi
331 AC_SUBST(ASCIIDOC8)
332
333
334 ## Checks for libraries.
335 AC_MSG_NOTICE([CHECKS for libraries])
336 #
337 # Define NO_OPENSSL environment variable if you do not have OpenSSL.
338 # Define NEEDS_SSL_WITH_CRYPTO if you need -lcrypto with -lssl (Darwin).
339
340 GIT_STASH_FLAGS($OPENSSLDIR)
341
342 AC_CHECK_LIB([crypto], [SHA1_Init],
343 [NEEDS_SSL_WITH_CRYPTO=],
344 [AC_CHECK_LIB([ssl], [SHA1_Init],
345 [NEEDS_SSL_WITH_CRYPTO=YesPlease
346 NEEDS_SSL_WITH_CRYPTO=],
347 [NO_OPENSSL=YesPlease])])
348
349 GIT_UNSTASH_FLAGS($OPENSSLDIR)
350
351 AC_SUBST(NEEDS_SSL_WITH_CRYPTO)
352 AC_SUBST(NO_OPENSSL)
353
354 #
355 # Define NO_CURL if you do not have libcurl installed. git-http-pull and
356 # git-http-push are not built, and you cannot use http:// and https://
357 # transports.
358
359 GIT_STASH_FLAGS($CURLDIR)
360
361 AC_CHECK_LIB([curl], [curl_global_init],
362 [NO_CURL=],
363 [NO_CURL=YesPlease])
364
365 GIT_UNSTASH_FLAGS($CURLDIR)
366
367 AC_SUBST(NO_CURL)
368
369 #
370 # Define NO_EXPAT if you do not have expat installed. git-http-push is
371 # not built, and you cannot push using http:// and https:// transports.
372
373 GIT_STASH_FLAGS($EXPATDIR)
374
375 AC_CHECK_LIB([expat], [XML_ParserCreate],
376 [NO_EXPAT=],
377 [NO_EXPAT=YesPlease])
378
379 GIT_UNSTASH_FLAGS($EXPATDIR)
380
381 AC_SUBST(NO_EXPAT)
382
383 #
384 # Define NEEDS_LIBICONV if linking with libc is not enough (Darwin and
385 # some Solaris installations).
386 # Define NO_ICONV if neither libc nor libiconv support iconv.
387
388 GIT_STASH_FLAGS($ICONVDIR)
389
390 AC_DEFUN([ICONVTEST_SRC], [
391 #include <iconv.h>
392
393 int main(void)
394 {
395 iconv_open("", "");
396 return 0;
397 }
398 ])
399
400 if test -n "$ICONVDIR"; then
401 lib_order="-liconv -lc"
402 else
403 lib_order="-lc -liconv"
404 fi
405
406 NO_ICONV=YesPlease
407
408 for l in $lib_order; do
409 if test "$l" = "-liconv"; then
410 NEEDS_LIBICONV=YesPlease
411 else
412 NEEDS_LIBICONV=
413 fi
414
415 old_LIBS="$LIBS"
416 LIBS="$LIBS $l"
417 AC_MSG_CHECKING([for iconv in $l])
418 AC_LINK_IFELSE(ICONVTEST_SRC,
419 [AC_MSG_RESULT([yes])
420 NO_ICONV=
421 break],
422 [AC_MSG_RESULT([no])])
423 LIBS="$old_LIBS"
424 done
425
426 #in case of break
427 LIBS="$old_LIBS"
428
429 GIT_UNSTASH_FLAGS($ICONVDIR)
430
431 AC_SUBST(NEEDS_LIBICONV)
432 AC_SUBST(NO_ICONV)
433
434 #
435 # Define NO_DEFLATE_BOUND if deflateBound is missing from zlib.
436
437 GIT_STASH_FLAGS($ZLIB_PATH)
438
439 AC_DEFUN([ZLIBTEST_SRC], [
440 #include <zlib.h>
441
442 int main(void)
443 {
444 deflateBound(0, 0);
445 return 0;
446 }
447 ])
448 AC_MSG_CHECKING([for deflateBound in -lz])
449 old_LIBS="$LIBS"
450 LIBS="$LIBS -lz"
451 AC_LINK_IFELSE(ZLIBTEST_SRC,
452 [AC_MSG_RESULT([yes])],
453 [AC_MSG_RESULT([no])
454 NO_DEFLATE_BOUND=yes])
455 LIBS="$old_LIBS"
456
457 GIT_UNSTASH_FLAGS($ZLIB_PATH)
458
459 AC_SUBST(NO_DEFLATE_BOUND)
460
461 #
462 # Define NEEDS_SOCKET if linking with libc is not enough (SunOS,
463 # Patrick Mauritz).
464 AC_CHECK_LIB([c], [socket],
465 [NEEDS_SOCKET=],
466 [NEEDS_SOCKET=YesPlease])
467 AC_SUBST(NEEDS_SOCKET)
468 test -n "$NEEDS_SOCKET" && LIBS="$LIBS -lsocket"
469
470
471 ## Checks for header files.
472 AC_MSG_NOTICE([CHECKS for header files])
473 #
474 # Define NO_SYS_SELECT_H if you don't have sys/select.h.
475 AC_CHECK_HEADER([sys/select.h],
476 [NO_SYS_SELECT_H=],
477 [NO_SYS_SELECT_H=UnfortunatelyYes])
478 AC_SUBST(NO_SYS_SELECT_H)
479 #
480 # Define OLD_ICONV if your library has an old iconv(), where the second
481 # (input buffer pointer) parameter is declared with type (const char **).
482 AC_DEFUN([OLDICONVTEST_SRC], [[
483 #include <iconv.h>
484
485 extern size_t iconv(iconv_t cd,
486 char **inbuf, size_t *inbytesleft,
487 char **outbuf, size_t *outbytesleft);
488
489 int main(void)
490 {
491 return 0;
492 }
493 ]])
494
495 GIT_STASH_FLAGS($ICONVDIR)
496
497 AC_MSG_CHECKING([for old iconv()])
498 AC_COMPILE_IFELSE(OLDICONVTEST_SRC,
499 [AC_MSG_RESULT([no])],
500 [AC_MSG_RESULT([yes])
501 OLD_ICONV=UnfortunatelyYes])
502
503 GIT_UNSTASH_FLAGS($ICONVDIR)
504
505 AC_SUBST(OLD_ICONV)
506
507 ## Checks for typedefs, structures, and compiler characteristics.
508 AC_MSG_NOTICE([CHECKS for typedefs, structures, and compiler characteristics])
509 #
510 # Define NO_D_INO_IN_DIRENT if you don't have d_ino in your struct dirent.
511 AC_CHECK_MEMBER(struct dirent.d_ino,
512 [NO_D_INO_IN_DIRENT=],
513 [NO_D_INO_IN_DIRENT=YesPlease],
514 [#include <dirent.h>])
515 AC_SUBST(NO_D_INO_IN_DIRENT)
516 #
517 # Define NO_D_TYPE_IN_DIRENT if your platform defines DT_UNKNOWN but lacks
518 # d_type in struct dirent (latest Cygwin -- will be fixed soonish).
519 AC_CHECK_MEMBER(struct dirent.d_type,
520 [NO_D_TYPE_IN_DIRENT=],
521 [NO_D_TYPE_IN_DIRENT=YesPlease],
522 [#include <dirent.h>])
523 AC_SUBST(NO_D_TYPE_IN_DIRENT)
524 #
525 # Define NO_SOCKADDR_STORAGE if your platform does not have struct
526 # sockaddr_storage.
527 AC_CHECK_TYPE(struct sockaddr_storage,
528 [NO_SOCKADDR_STORAGE=],
529 [NO_SOCKADDR_STORAGE=YesPlease],[
530 #include <sys/types.h>
531 #include <sys/socket.h>
532 ])
533 AC_SUBST(NO_SOCKADDR_STORAGE)
534 #
535 # Define NO_IPV6 if you lack IPv6 support and getaddrinfo().
536 AC_CHECK_TYPE([struct addrinfo],[
537 GIT_CHECK_FUNC([getaddrinfo],
538 [NO_IPV6=],
539 [NO_IPV6=YesPlease])
540 ],[NO_IPV6=YesPlease],[
541 #include <sys/types.h>
542 #include <sys/socket.h>
543 #include <netdb.h>
544 ])
545 AC_SUBST(NO_IPV6)
546 #
547 # Define NO_C99_FORMAT if your formatted IO functions (printf/scanf et.al.)
548 # do not support the 'size specifiers' introduced by C99, namely ll, hh,
549 # j, z, t. (representing long long int, char, intmax_t, size_t, ptrdiff_t).
550 # some C compilers supported these specifiers prior to C99 as an extension.
551 AC_CACHE_CHECK([whether formatted IO functions support C99 size specifiers],
552 [ac_cv_c_c99_format],
553 [# Actually git uses only %z (%zu) in alloc.c, and %t (%td) in mktag.c
554 AC_RUN_IFELSE(
555 [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
556 [[char buf[64];
557 if (sprintf(buf, "%lld%hhd%jd%zd%td", (long long int)1, (char)2, (intmax_t)3, (size_t)4, (ptrdiff_t)5) != 5)
558 return 1;
559 else if (strcmp(buf, "12345"))
560 return 2;]])],
561 [ac_cv_c_c99_format=yes],
562 [ac_cv_c_c99_format=no])
563 ])
564 if test $ac_cv_c_c99_format = no; then
565 NO_C99_FORMAT=YesPlease
566 else
567 NO_C99_FORMAT=
568 fi
569 AC_SUBST(NO_C99_FORMAT)
570 #
571 # Define FREAD_READS_DIRECTORIES if your are on a system which succeeds
572 # when attempting to read from an fopen'ed directory.
573 AC_CACHE_CHECK([whether system succeeds to read fopen'ed directory],
574 [ac_cv_fread_reads_directories],
575 [
576 AC_RUN_IFELSE(
577 [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
578 [[char c;
579 FILE *f = fopen(".", "r");
580 return f && fread(&c, 1, 1, f)]])],
581 [ac_cv_fread_reads_directories=no],
582 [ac_cv_fread_reads_directories=yes])
583 ])
584 if test $ac_cv_fread_reads_directories = yes; then
585 FREAD_READS_DIRECTORIES=UnfortunatelyYes
586 else
587 FREAD_READS_DIRECTORIES=
588 fi
589 AC_SUBST(FREAD_READS_DIRECTORIES)
590 #
591 # Define SNPRINTF_RETURNS_BOGUS if your are on a system which snprintf()
592 # or vsnprintf() return -1 instead of number of characters which would
593 # have been written to the final string if enough space had been available.
594 AC_CACHE_CHECK([whether snprintf() and/or vsnprintf() return bogus value],
595 [ac_cv_snprintf_returns_bogus],
596 [
597 AC_RUN_IFELSE(
598 [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT
599 #include "stdarg.h"
600
601 int test_vsnprintf(char *str, size_t maxsize, const char *format, ...)
602 {
603 int ret;
604 va_list ap;
605 va_start(ap, format);
606 ret = vsnprintf(str, maxsize, format, ap);
607 va_end(ap);
608 return ret;
609 }],
610 [[char buf[6];
611 if (test_vsnprintf(buf, 3, "%s", "12345") != 5
612 || strcmp(buf, "12")) return 1;
613 if (snprintf(buf, 3, "%s", "12345") != 5
614 || strcmp(buf, "12")) return 1]])],
615 [ac_cv_snprintf_returns_bogus=no],
616 [ac_cv_snprintf_returns_bogus=yes])
617 ])
618 if test $ac_cv_snprintf_returns_bogus = yes; then
619 SNPRINTF_RETURNS_BOGUS=UnfortunatelyYes
620 else
621 SNPRINTF_RETURNS_BOGUS=
622 fi
623 AC_SUBST(SNPRINTF_RETURNS_BOGUS)
624
625
626 ## Checks for library functions.
627 ## (in default C library and libraries checked by AC_CHECK_LIB)
628 AC_MSG_NOTICE([CHECKS for library functions])
629 #
630 # Define NO_STRCASESTR if you don't have strcasestr.
631 GIT_CHECK_FUNC(strcasestr,
632 [NO_STRCASESTR=],
633 [NO_STRCASESTR=YesPlease])
634 AC_SUBST(NO_STRCASESTR)
635 #
636 # Define NO_MEMMEM if you don't have memmem.
637 GIT_CHECK_FUNC(memmem,
638 [NO_MEMMEM=],
639 [NO_MEMMEM=YesPlease])
640 AC_SUBST(NO_MEMMEM)
641 #
642 # Define NO_STRLCPY if you don't have strlcpy.
643 GIT_CHECK_FUNC(strlcpy,
644 [NO_STRLCPY=],
645 [NO_STRLCPY=YesPlease])
646 AC_SUBST(NO_STRLCPY)
647 #
648 # Define NO_UINTMAX_T if your platform does not have uintmax_t
649 AC_CHECK_TYPE(uintmax_t,
650 [NO_UINTMAX_T=],
651 [NO_UINTMAX_T=YesPlease],[
652 #include <inttypes.h>
653 ])
654 AC_SUBST(NO_UINTMAX_T)
655 #
656 # Define NO_STRTOUMAX if you don't have strtoumax in the C library.
657 GIT_CHECK_FUNC(strtoumax,
658 [NO_STRTOUMAX=],
659 [NO_STRTOUMAX=YesPlease])
660 AC_SUBST(NO_STRTOUMAX)
661 #
662 # Define NO_SETENV if you don't have setenv in the C library.
663 GIT_CHECK_FUNC(setenv,
664 [NO_SETENV=],
665 [NO_SETENV=YesPlease])
666 AC_SUBST(NO_SETENV)
667 #
668 # Define NO_UNSETENV if you don't have unsetenv in the C library.
669 GIT_CHECK_FUNC(unsetenv,
670 [NO_UNSETENV=],
671 [NO_UNSETENV=YesPlease])
672 AC_SUBST(NO_UNSETENV)
673 #
674 # Define NO_MKDTEMP if you don't have mkdtemp in the C library.
675 GIT_CHECK_FUNC(mkdtemp,
676 [NO_MKDTEMP=],
677 [NO_MKDTEMP=YesPlease])
678 AC_SUBST(NO_MKDTEMP)
679 #
680 # Define NO_MMAP if you want to avoid mmap.
681 #
682 # Define NO_ICONV if your libc does not properly support iconv.
683
684
685 ## Other checks.
686 # Define USE_PIC if you need the main git objects to be built with -fPIC
687 # in order to build and link perl/Git.so. x86-64 seems to need this.
688 #
689 # Define NO_SYMLINK_HEAD if you never want .git/HEAD to be a symbolic link.
690 # Enable it on Windows. By default, symrefs are still used.
691 #
692 # Define NO_PTHREADS if we do not have pthreads
693 #
694 # Define PTHREAD_LIBS to the linker flag used for Pthread support and define
695 # THREADED_DELTA_SEARCH if Pthreads are available.
696 AC_DEFUN([PTHREADTEST_SRC], [
697 #include <pthread.h>
698
699 int main(void)
700 {
701 pthread_mutex_t test_mutex;
702 return (0);
703 }
704 ])
705
706 dnl AC_LANG_CONFTEST([AC_LANG_PROGRAM(
707 dnl [[#include <pthread.h>]],
708 dnl [[pthread_mutex_t test_mutex;]]
709 dnl )])
710
711 NO_PTHREADS=UnfortunatelyYes
712 THREADED_DELTA_SEARCH=
713 PTHREAD_LIBS=
714
715 if test -n "$USER_NOPTHREAD"; then
716 AC_MSG_NOTICE([Skipping POSIX Threads at user request.])
717 # handle these separately since PTHREAD_CFLAGS could be '-lpthreads
718 # -D_REENTRANT' or some such.
719 elif test -z "$PTHREAD_CFLAGS"; then
720 for opt in -pthread -lpthread; do
721 old_CFLAGS="$CFLAGS"
722 CFLAGS="$opt $CFLAGS"
723 AC_MSG_CHECKING([Checking for POSIX Threads with '$opt'])
724 AC_LINK_IFELSE(PTHREADTEST_SRC,
725 [AC_MSG_RESULT([yes])
726 NO_PTHREADS=
727 PTHREAD_LIBS="$opt"
728 THREADED_DELTA_SEARCH=YesPlease
729 break
730 ],
731 [AC_MSG_RESULT([no])])
732 CFLAGS="$old_CFLAGS"
733 done
734 else
735 old_CFLAGS="$CFLAGS"
736 CFLAGS="$PTHREAD_CFLAGS $CFLAGS"
737 AC_MSG_CHECKING([Checking for POSIX Threads with '$PTHREAD_CFLAGS'])
738 AC_LINK_IFELSE(PTHREADTEST_SRC,
739 [AC_MSG_RESULT([yes])
740 NO_PTHREADS=
741 PTHREAD_LIBS="$PTHREAD_CFLAGS"
742 THREADED_DELTA_SEARCH=YesPlease
743 ],
744 [AC_MSG_RESULT([no])])
745
746 CFLAGS="$old_CFLAGS"
747 fi
748
749 CFLAGS="$old_CFLAGS"
750
751 AC_SUBST(PTHREAD_LIBS)
752 AC_SUBST(NO_PTHREADS)
753 AC_SUBST(THREADED_DELTA_SEARCH)
754
755 ## Output files
756 AC_CONFIG_FILES(["${config_file}":"${config_in}":"${config_append}"])
757 AC_OUTPUT
758
759
760 ## Cleanup
761 rm -f "${config_append}"