remove ARM and Mozilla SHA1 implementations
[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 PPC_SHA1 environment variable when running make to make use of
160 # a bundled SHA1 routine optimized for PowerPC.
161 #
162 # Define NO_OPENSSL environment variable if you do not have OpenSSL.
163 # This also implies BLK_SHA1.
164 #
165 # Define OPENSSLDIR=/foo/bar if your openssl header and library files are in
166 # /foo/bar/include and /foo/bar/lib directories.
167 AC_ARG_WITH(openssl,
168 AS_HELP_STRING([--with-openssl],[use OpenSSL library (default is YES)])
169 AS_HELP_STRING([], [ARG can be prefix for openssl library and headers]),\
170 GIT_PARSE_WITH(openssl))
171 #
172 # Define NO_CURL if you do not have curl installed. git-http-pull and
173 # git-http-push are not built, and you cannot use http:// and https://
174 # transports.
175 #
176 # Define CURLDIR=/foo/bar if your curl header and library files are in
177 # /foo/bar/include and /foo/bar/lib directories.
178 AC_ARG_WITH(curl,
179 AS_HELP_STRING([--with-curl],[support http(s):// transports (default is YES)])
180 AS_HELP_STRING([], [ARG can be also prefix for curl library and headers]),
181 GIT_PARSE_WITH(curl))
182 #
183 # Define NO_EXPAT if you do not have expat installed. git-http-push is
184 # not built, and you cannot push using http:// and https:// transports.
185 #
186 # Define EXPATDIR=/foo/bar if your expat header and library files are in
187 # /foo/bar/include and /foo/bar/lib directories.
188 AC_ARG_WITH(expat,
189 AS_HELP_STRING([--with-expat],
190 [support git-push using http:// and https:// transports via WebDAV (default is YES)])
191 AS_HELP_STRING([], [ARG can be also prefix for expat library and headers]),
192 GIT_PARSE_WITH(expat))
193 #
194 # Define NO_FINK if you are building on Darwin/Mac OS X, have Fink
195 # installed in /sw, but don't want GIT to link against any libraries
196 # installed there. If defined you may specify your own (or Fink's)
197 # include directories and library directories by defining CFLAGS
198 # and LDFLAGS appropriately.
199 #
200 # Define NO_DARWIN_PORTS if you are building on Darwin/Mac OS X,
201 # have DarwinPorts installed in /opt/local, but don't want GIT to
202 # link against any libraries installed there. If defined you may
203 # specify your own (or DarwinPort's) include directories and
204 # library directories by defining CFLAGS and LDFLAGS appropriately.
205 #
206 # Define NO_MMAP if you want to avoid mmap.
207 #
208 # Define NO_ICONV if your libc does not properly support iconv.
209 AC_ARG_WITH(iconv,
210 AS_HELP_STRING([--without-iconv],
211 [if your architecture doesn't properly support iconv])
212 AS_HELP_STRING([--with-iconv=PATH],
213 [PATH is prefix for libiconv library and headers])
214 AS_HELP_STRING([],
215 [used only if you need linking with libiconv]),
216 GIT_PARSE_WITH(iconv))
217
218 ## --enable-FEATURE[=ARG] and --disable-FEATURE
219 #
220 # Define USE_NSEC below if you want git to care about sub-second file mtimes
221 # and ctimes. Note that you need recent glibc (at least 2.2.4) for this, and
222 # it will BREAK YOUR LOCAL DIFFS! show-diff and anything using it will likely
223 # randomly break unless your underlying filesystem supports those sub-second
224 # times (my ext3 doesn't).
225 #
226 # Define USE_STDEV below if you want git to care about the underlying device
227 # change being considered an inode change from the update-index perspective.
228
229 #
230 # Define SHELL_PATH to provide path to shell.
231 GIT_ARG_SET_PATH(shell)
232 #
233 # Define PERL_PATH to provide path to Perl.
234 GIT_ARG_SET_PATH(perl)
235 #
236 # Define ZLIB_PATH to provide path to zlib.
237 GIT_ARG_SET_PATH(zlib)
238 #
239 # Declare the with-tcltk/without-tcltk options.
240 AC_ARG_WITH(tcltk,
241 AS_HELP_STRING([--with-tcltk],[use Tcl/Tk GUI (default is YES)])
242 AS_HELP_STRING([],[ARG is the full path to the Tcl/Tk interpreter.])
243 AS_HELP_STRING([],[Bare --with-tcltk will make the GUI part only if])
244 AS_HELP_STRING([],[Tcl/Tk interpreter will be found in a system.]),\
245 GIT_PARSE_WITH(tcltk))
246 #
247
248
249 ## Checks for programs.
250 AC_MSG_NOTICE([CHECKS for programs])
251 #
252 AC_PROG_CC([cc gcc])
253 # which switch to pass runtime path to dynamic libraries to the linker
254 AC_CACHE_CHECK([if linker supports -R], git_cv_ld_dashr, [
255 SAVE_LDFLAGS="${LDFLAGS}"
256 LDFLAGS="${SAVE_LDFLAGS} -R /"
257 AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [git_cv_ld_dashr=yes], [git_cv_ld_dashr=no])
258 LDFLAGS="${SAVE_LDFLAGS}"
259 ])
260 if test "$git_cv_ld_dashr" = "yes"; then
261 AC_SUBST(CC_LD_DYNPATH, [-R])
262 else
263 AC_CACHE_CHECK([if linker supports -Wl,-rpath,], git_cv_ld_wl_rpath, [
264 SAVE_LDFLAGS="${LDFLAGS}"
265 LDFLAGS="${SAVE_LDFLAGS} -Wl,-rpath,/"
266 AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [git_cv_ld_wl_rpath=yes], [git_cv_ld_wl_rpath=no])
267 LDFLAGS="${SAVE_LDFLAGS}"
268 ])
269 if test "$git_cv_ld_wl_rpath" = "yes"; then
270 AC_SUBST(CC_LD_DYNPATH, [-Wl,-rpath,])
271 else
272 AC_CACHE_CHECK([if linker supports -rpath], git_cv_ld_rpath, [
273 SAVE_LDFLAGS="${LDFLAGS}"
274 LDFLAGS="${SAVE_LDFLAGS} -rpath /"
275 AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [git_cv_ld_rpath=yes], [git_cv_ld_rpath=no])
276 LDFLAGS="${SAVE_LDFLAGS}"
277 ])
278 if test "$git_cv_ld_rpath" = "yes"; then
279 AC_SUBST(CC_LD_DYNPATH, [-rpath])
280 else
281 AC_MSG_WARN([linker does not support runtime path to dynamic libraries])
282 fi
283 fi
284 fi
285 #AC_PROG_INSTALL # needs install-sh or install.sh in sources
286 AC_CHECK_TOOLS(AR, [gar ar], :)
287 AC_CHECK_PROGS(TAR, [gtar tar])
288 # TCLTK_PATH will be set to some value if we want Tcl/Tk
289 # or will be empty otherwise.
290 if test -z "$NO_TCLTK"; then
291 if test "$with_tcltk" = ""; then
292 # No Tcl/Tk switches given. Do not check for Tcl/Tk, use bare 'wish'.
293 TCLTK_PATH=wish
294 AC_SUBST(TCLTK_PATH)
295 elif test "$with_tcltk" = "yes"; then
296 # Tcl/Tk check requested.
297 AC_CHECK_PROGS(TCLTK_PATH, [wish], )
298 else
299 AC_MSG_RESULT([Using Tcl/Tk interpreter $with_tcltk])
300 TCLTK_PATH="$with_tcltk"
301 AC_SUBST(TCLTK_PATH)
302 fi
303 fi
304 AC_CHECK_PROGS(ASCIIDOC, [asciidoc])
305 if test -n "$ASCIIDOC"; then
306 AC_MSG_CHECKING([for asciidoc version])
307 asciidoc_version=`$ASCIIDOC --version 2>/dev/null`
308 case "${asciidoc_version}" in
309 asciidoc' '8*)
310 ASCIIDOC8=YesPlease
311 AC_MSG_RESULT([${asciidoc_version} > 7])
312 ;;
313 asciidoc' '7*)
314 ASCIIDOC8=
315 AC_MSG_RESULT([${asciidoc_version}])
316 ;;
317 *)
318 ASCIIDOC8=
319 AC_MSG_RESULT([${asciidoc_version} (unknown)])
320 ;;
321 esac
322 fi
323 AC_SUBST(ASCIIDOC8)
324
325
326 ## Checks for libraries.
327 AC_MSG_NOTICE([CHECKS for libraries])
328 #
329 # Define NO_OPENSSL environment variable if you do not have OpenSSL.
330 # Define NEEDS_SSL_WITH_CRYPTO if you need -lcrypto with -lssl (Darwin).
331
332 GIT_STASH_FLAGS($OPENSSLDIR)
333
334 AC_CHECK_LIB([crypto], [SHA1_Init],
335 [NEEDS_SSL_WITH_CRYPTO=],
336 [AC_CHECK_LIB([ssl], [SHA1_Init],
337 [NEEDS_SSL_WITH_CRYPTO=YesPlease],
338 [NEEDS_SSL_WITH_CRYPTO= NO_OPENSSL=YesPlease])])
339
340 GIT_UNSTASH_FLAGS($OPENSSLDIR)
341
342 AC_SUBST(NEEDS_SSL_WITH_CRYPTO)
343 AC_SUBST(NO_OPENSSL)
344
345 #
346 # Define NO_CURL if you do not have libcurl installed. git-http-pull and
347 # git-http-push are not built, and you cannot use http:// and https://
348 # transports.
349
350 GIT_STASH_FLAGS($CURLDIR)
351
352 AC_CHECK_LIB([curl], [curl_global_init],
353 [NO_CURL=],
354 [NO_CURL=YesPlease])
355
356 GIT_UNSTASH_FLAGS($CURLDIR)
357
358 AC_SUBST(NO_CURL)
359
360 #
361 # Define NO_EXPAT if you do not have expat installed. git-http-push is
362 # not built, and you cannot push using http:// and https:// transports.
363
364 GIT_STASH_FLAGS($EXPATDIR)
365
366 AC_CHECK_LIB([expat], [XML_ParserCreate],
367 [NO_EXPAT=],
368 [NO_EXPAT=YesPlease])
369
370 GIT_UNSTASH_FLAGS($EXPATDIR)
371
372 AC_SUBST(NO_EXPAT)
373
374 #
375 # Define NEEDS_LIBICONV if linking with libc is not enough (Darwin and
376 # some Solaris installations).
377 # Define NO_ICONV if neither libc nor libiconv support iconv.
378
379 if test -z "$NO_ICONV"; then
380
381 GIT_STASH_FLAGS($ICONVDIR)
382
383 AC_DEFUN([ICONVTEST_SRC], [
384 #include <iconv.h>
385
386 int main(void)
387 {
388 iconv_open("", "");
389 return 0;
390 }
391 ])
392
393 if test -n "$ICONVDIR"; then
394 lib_order="-liconv -lc"
395 else
396 lib_order="-lc -liconv"
397 fi
398
399 NO_ICONV=YesPlease
400
401 for l in $lib_order; do
402 if test "$l" = "-liconv"; then
403 NEEDS_LIBICONV=YesPlease
404 else
405 NEEDS_LIBICONV=
406 fi
407
408 old_LIBS="$LIBS"
409 LIBS="$LIBS $l"
410 AC_MSG_CHECKING([for iconv in $l])
411 AC_LINK_IFELSE(ICONVTEST_SRC,
412 [AC_MSG_RESULT([yes])
413 NO_ICONV=
414 break],
415 [AC_MSG_RESULT([no])])
416 LIBS="$old_LIBS"
417 done
418
419 #in case of break
420 LIBS="$old_LIBS"
421
422 GIT_UNSTASH_FLAGS($ICONVDIR)
423
424 AC_SUBST(NEEDS_LIBICONV)
425 AC_SUBST(NO_ICONV)
426
427 if test -n "$NO_ICONV"; then
428 NEEDS_LIBICONV=
429 fi
430
431 fi
432
433 #
434 # Define NO_DEFLATE_BOUND if deflateBound is missing from zlib.
435
436 GIT_STASH_FLAGS($ZLIB_PATH)
437
438 AC_DEFUN([ZLIBTEST_SRC], [
439 #include <zlib.h>
440
441 int main(void)
442 {
443 deflateBound(0, 0);
444 return 0;
445 }
446 ])
447 AC_MSG_CHECKING([for deflateBound in -lz])
448 old_LIBS="$LIBS"
449 LIBS="$LIBS -lz"
450 AC_LINK_IFELSE(ZLIBTEST_SRC,
451 [AC_MSG_RESULT([yes])],
452 [AC_MSG_RESULT([no])
453 NO_DEFLATE_BOUND=yes])
454 LIBS="$old_LIBS"
455
456 GIT_UNSTASH_FLAGS($ZLIB_PATH)
457
458 AC_SUBST(NO_DEFLATE_BOUND)
459
460 #
461 # Define NEEDS_SOCKET if linking with libc is not enough (SunOS,
462 # Patrick Mauritz).
463 AC_CHECK_LIB([c], [socket],
464 [NEEDS_SOCKET=],
465 [NEEDS_SOCKET=YesPlease])
466 AC_SUBST(NEEDS_SOCKET)
467 test -n "$NEEDS_SOCKET" && LIBS="$LIBS -lsocket"
468
469 #
470 # Define NEEDS_RESOLV if linking with -lnsl and/or -lsocket is not enough.
471 # Notably on Solaris hstrerror resides in libresolv and on Solaris 7
472 # inet_ntop and inet_pton additionally reside there.
473 AC_CHECK_LIB([c], [hstrerror],
474 [NEEDS_RESOLV=],
475 [NEEDS_RESOLV=YesPlease])
476 AC_SUBST(NEEDS_RESOLV)
477 test -n "$NEEDS_RESOLV" && LIBS="$LIBS -lresolv"
478
479 AC_CHECK_LIB([c], [basename],
480 [NEEDS_LIBGEN=],
481 [NEEDS_LIBGEN=YesPlease])
482 AC_SUBST(NEEDS_LIBGEN)
483 test -n "$NEEDS_LIBGEN" && LIBS="$LIBS -lgen"
484
485 ## Checks for header files.
486 AC_MSG_NOTICE([CHECKS for header files])
487 #
488 # Define NO_SYS_SELECT_H if you don't have sys/select.h.
489 AC_CHECK_HEADER([sys/select.h],
490 [NO_SYS_SELECT_H=],
491 [NO_SYS_SELECT_H=UnfortunatelyYes])
492 AC_SUBST(NO_SYS_SELECT_H)
493 #
494 # Define OLD_ICONV if your library has an old iconv(), where the second
495 # (input buffer pointer) parameter is declared with type (const char **).
496 AC_DEFUN([OLDICONVTEST_SRC], [[
497 #include <iconv.h>
498
499 extern size_t iconv(iconv_t cd,
500 char **inbuf, size_t *inbytesleft,
501 char **outbuf, size_t *outbytesleft);
502
503 int main(void)
504 {
505 return 0;
506 }
507 ]])
508
509 GIT_STASH_FLAGS($ICONVDIR)
510
511 AC_MSG_CHECKING([for old iconv()])
512 AC_COMPILE_IFELSE(OLDICONVTEST_SRC,
513 [AC_MSG_RESULT([no])],
514 [AC_MSG_RESULT([yes])
515 OLD_ICONV=UnfortunatelyYes])
516
517 GIT_UNSTASH_FLAGS($ICONVDIR)
518
519 AC_SUBST(OLD_ICONV)
520
521 ## Checks for typedefs, structures, and compiler characteristics.
522 AC_MSG_NOTICE([CHECKS for typedefs, structures, and compiler characteristics])
523 #
524 # Define NO_D_INO_IN_DIRENT if you don't have d_ino in your struct dirent.
525 AC_CHECK_MEMBER(struct dirent.d_ino,
526 [NO_D_INO_IN_DIRENT=],
527 [NO_D_INO_IN_DIRENT=YesPlease],
528 [#include <dirent.h>])
529 AC_SUBST(NO_D_INO_IN_DIRENT)
530 #
531 # Define NO_D_TYPE_IN_DIRENT if your platform defines DT_UNKNOWN but lacks
532 # d_type in struct dirent (latest Cygwin -- will be fixed soonish).
533 AC_CHECK_MEMBER(struct dirent.d_type,
534 [NO_D_TYPE_IN_DIRENT=],
535 [NO_D_TYPE_IN_DIRENT=YesPlease],
536 [#include <dirent.h>])
537 AC_SUBST(NO_D_TYPE_IN_DIRENT)
538 #
539 # Define NO_SOCKADDR_STORAGE if your platform does not have struct
540 # sockaddr_storage.
541 AC_CHECK_TYPE(struct sockaddr_storage,
542 [NO_SOCKADDR_STORAGE=],
543 [NO_SOCKADDR_STORAGE=YesPlease],[
544 #include <sys/types.h>
545 #include <sys/socket.h>
546 ])
547 AC_SUBST(NO_SOCKADDR_STORAGE)
548 #
549 # Define NO_IPV6 if you lack IPv6 support and getaddrinfo().
550 AC_CHECK_TYPE([struct addrinfo],[
551 GIT_CHECK_FUNC([getaddrinfo],
552 [NO_IPV6=],
553 [NO_IPV6=YesPlease])
554 ],[NO_IPV6=YesPlease],[
555 #include <sys/types.h>
556 #include <sys/socket.h>
557 #include <netdb.h>
558 ])
559 AC_SUBST(NO_IPV6)
560 #
561 # Define NO_C99_FORMAT if your formatted IO functions (printf/scanf et.al.)
562 # do not support the 'size specifiers' introduced by C99, namely ll, hh,
563 # j, z, t. (representing long long int, char, intmax_t, size_t, ptrdiff_t).
564 # some C compilers supported these specifiers prior to C99 as an extension.
565 AC_CACHE_CHECK([whether formatted IO functions support C99 size specifiers],
566 [ac_cv_c_c99_format],
567 [# Actually git uses only %z (%zu) in alloc.c, and %t (%td) in mktag.c
568 AC_RUN_IFELSE(
569 [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
570 [[char buf[64];
571 if (sprintf(buf, "%lld%hhd%jd%zd%td", (long long int)1, (char)2, (intmax_t)3, (size_t)4, (ptrdiff_t)5) != 5)
572 return 1;
573 else if (strcmp(buf, "12345"))
574 return 2;]])],
575 [ac_cv_c_c99_format=yes],
576 [ac_cv_c_c99_format=no])
577 ])
578 if test $ac_cv_c_c99_format = no; then
579 NO_C99_FORMAT=YesPlease
580 else
581 NO_C99_FORMAT=
582 fi
583 AC_SUBST(NO_C99_FORMAT)
584 #
585 # Define FREAD_READS_DIRECTORIES if your are on a system which succeeds
586 # when attempting to read from an fopen'ed directory.
587 AC_CACHE_CHECK([whether system succeeds to read fopen'ed directory],
588 [ac_cv_fread_reads_directories],
589 [
590 AC_RUN_IFELSE(
591 [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
592 [[char c;
593 FILE *f = fopen(".", "r");
594 return f && fread(&c, 1, 1, f)]])],
595 [ac_cv_fread_reads_directories=no],
596 [ac_cv_fread_reads_directories=yes])
597 ])
598 if test $ac_cv_fread_reads_directories = yes; then
599 FREAD_READS_DIRECTORIES=UnfortunatelyYes
600 else
601 FREAD_READS_DIRECTORIES=
602 fi
603 AC_SUBST(FREAD_READS_DIRECTORIES)
604 #
605 # Define SNPRINTF_RETURNS_BOGUS if your are on a system which snprintf()
606 # or vsnprintf() return -1 instead of number of characters which would
607 # have been written to the final string if enough space had been available.
608 AC_CACHE_CHECK([whether snprintf() and/or vsnprintf() return bogus value],
609 [ac_cv_snprintf_returns_bogus],
610 [
611 AC_RUN_IFELSE(
612 [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT
613 #include "stdarg.h"
614
615 int test_vsnprintf(char *str, size_t maxsize, const char *format, ...)
616 {
617 int ret;
618 va_list ap;
619 va_start(ap, format);
620 ret = vsnprintf(str, maxsize, format, ap);
621 va_end(ap);
622 return ret;
623 }],
624 [[char buf[6];
625 if (test_vsnprintf(buf, 3, "%s", "12345") != 5
626 || strcmp(buf, "12")) return 1;
627 if (snprintf(buf, 3, "%s", "12345") != 5
628 || strcmp(buf, "12")) return 1]])],
629 [ac_cv_snprintf_returns_bogus=no],
630 [ac_cv_snprintf_returns_bogus=yes])
631 ])
632 if test $ac_cv_snprintf_returns_bogus = yes; then
633 SNPRINTF_RETURNS_BOGUS=UnfortunatelyYes
634 else
635 SNPRINTF_RETURNS_BOGUS=
636 fi
637 AC_SUBST(SNPRINTF_RETURNS_BOGUS)
638
639
640 ## Checks for library functions.
641 ## (in default C library and libraries checked by AC_CHECK_LIB)
642 AC_MSG_NOTICE([CHECKS for library functions])
643 #
644 # Define NO_LIBGEN_H if you don't have libgen.h.
645 AC_CHECK_HEADER([libgen.h],
646 [NO_LIBGEN_H=],
647 [NO_LIBGEN_H=YesPlease])
648 AC_SUBST(NO_LIBGEN_H)
649 #
650 # Define NO_STRCASESTR if you don't have strcasestr.
651 GIT_CHECK_FUNC(strcasestr,
652 [NO_STRCASESTR=],
653 [NO_STRCASESTR=YesPlease])
654 AC_SUBST(NO_STRCASESTR)
655 #
656 # Define NO_MEMMEM if you don't have memmem.
657 GIT_CHECK_FUNC(memmem,
658 [NO_MEMMEM=],
659 [NO_MEMMEM=YesPlease])
660 AC_SUBST(NO_MEMMEM)
661 #
662 # Define NO_STRLCPY if you don't have strlcpy.
663 GIT_CHECK_FUNC(strlcpy,
664 [NO_STRLCPY=],
665 [NO_STRLCPY=YesPlease])
666 AC_SUBST(NO_STRLCPY)
667 #
668 # Define NO_UINTMAX_T if your platform does not have uintmax_t
669 AC_CHECK_TYPE(uintmax_t,
670 [NO_UINTMAX_T=],
671 [NO_UINTMAX_T=YesPlease],[
672 #include <inttypes.h>
673 ])
674 AC_SUBST(NO_UINTMAX_T)
675 #
676 # Define NO_STRTOUMAX if you don't have strtoumax in the C library.
677 GIT_CHECK_FUNC(strtoumax,
678 [NO_STRTOUMAX=],
679 [NO_STRTOUMAX=YesPlease])
680 AC_SUBST(NO_STRTOUMAX)
681 #
682 # Define NO_SETENV if you don't have setenv in the C library.
683 GIT_CHECK_FUNC(setenv,
684 [NO_SETENV=],
685 [NO_SETENV=YesPlease])
686 AC_SUBST(NO_SETENV)
687 #
688 # Define NO_UNSETENV if you don't have unsetenv in the C library.
689 GIT_CHECK_FUNC(unsetenv,
690 [NO_UNSETENV=],
691 [NO_UNSETENV=YesPlease])
692 AC_SUBST(NO_UNSETENV)
693 #
694 # Define NO_MKDTEMP if you don't have mkdtemp in the C library.
695 GIT_CHECK_FUNC(mkdtemp,
696 [NO_MKDTEMP=],
697 [NO_MKDTEMP=YesPlease])
698 AC_SUBST(NO_MKDTEMP)
699 #
700 # Define NO_MKSTEMPS if you don't have mkstemps in the C library.
701 GIT_CHECK_FUNC(mkstemps,
702 [NO_MKSTEMPS=],
703 [NO_MKSTEMPS=YesPlease])
704 AC_SUBST(NO_MKSTEMPS)
705 #
706 #
707 # Define NO_MMAP if you want to avoid mmap.
708 #
709 # Define NO_ICONV if your libc does not properly support iconv.
710
711
712 ## Other checks.
713 # Define USE_PIC if you need the main git objects to be built with -fPIC
714 # in order to build and link perl/Git.so. x86-64 seems to need this.
715 #
716 # Define NO_SYMLINK_HEAD if you never want .git/HEAD to be a symbolic link.
717 # Enable it on Windows. By default, symrefs are still used.
718 #
719 # Define NO_PTHREADS if we do not have pthreads
720 #
721 # Define PTHREAD_LIBS to the linker flag used for Pthread support and define
722 # THREADED_DELTA_SEARCH if Pthreads are available.
723 AC_DEFUN([PTHREADTEST_SRC], [
724 #include <pthread.h>
725
726 int main(void)
727 {
728 pthread_mutex_t test_mutex;
729 return (0);
730 }
731 ])
732
733 dnl AC_LANG_CONFTEST([AC_LANG_PROGRAM(
734 dnl [[#include <pthread.h>]],
735 dnl [[pthread_mutex_t test_mutex;]]
736 dnl )])
737
738 NO_PTHREADS=UnfortunatelyYes
739 THREADED_DELTA_SEARCH=
740 PTHREAD_LIBS=
741
742 if test -n "$USER_NOPTHREAD"; then
743 AC_MSG_NOTICE([Skipping POSIX Threads at user request.])
744 # handle these separately since PTHREAD_CFLAGS could be '-lpthreads
745 # -D_REENTRANT' or some such.
746 elif test -z "$PTHREAD_CFLAGS"; then
747 for opt in -pthread -lpthread; do
748 old_CFLAGS="$CFLAGS"
749 CFLAGS="$opt $CFLAGS"
750 AC_MSG_CHECKING([Checking for POSIX Threads with '$opt'])
751 AC_LINK_IFELSE(PTHREADTEST_SRC,
752 [AC_MSG_RESULT([yes])
753 NO_PTHREADS=
754 PTHREAD_LIBS="$opt"
755 THREADED_DELTA_SEARCH=YesPlease
756 break
757 ],
758 [AC_MSG_RESULT([no])])
759 CFLAGS="$old_CFLAGS"
760 done
761 else
762 old_CFLAGS="$CFLAGS"
763 CFLAGS="$PTHREAD_CFLAGS $CFLAGS"
764 AC_MSG_CHECKING([Checking for POSIX Threads with '$PTHREAD_CFLAGS'])
765 AC_LINK_IFELSE(PTHREADTEST_SRC,
766 [AC_MSG_RESULT([yes])
767 NO_PTHREADS=
768 PTHREAD_LIBS="$PTHREAD_CFLAGS"
769 THREADED_DELTA_SEARCH=YesPlease
770 ],
771 [AC_MSG_RESULT([no])])
772
773 CFLAGS="$old_CFLAGS"
774 fi
775
776 CFLAGS="$old_CFLAGS"
777
778 AC_SUBST(PTHREAD_LIBS)
779 AC_SUBST(NO_PTHREADS)
780 AC_SUBST(THREADED_DELTA_SEARCH)
781
782 ## Output files
783 AC_CONFIG_FILES(["${config_file}":"${config_in}":"${config_append}"])
784 AC_OUTPUT
785
786
787 ## Cleanup
788 rm -f "${config_append}"