Do not use "diff" found on PATH while building and installing
[git/git.git] / configure.ac
CommitLineData
55667714
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1# -*- Autoconf -*-
2# Process this file with autoconf to produce a configure script.
3
4AC_PREREQ(2.59)
3900145e 5AC_INIT([git], [@@GIT_VERSION@@], [git@vger.kernel.org])
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6
7AC_CONFIG_SRCDIR([git.c])
8
9config_file=config.mak.autogen
d3a6db98 10config_append=config.mak.append
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11config_in=config.mak.in
12
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13echo "# ${config_append}. Generated by configure." > "${config_append}"
14
15
16## Definitions of macros
17# GIT_CONF_APPEND_LINE(LINE)
18# --------------------------
19# Append LINE to file ${config_append}
20AC_DEFUN([GIT_CONF_APPEND_LINE],
21[echo "$1" >> "${config_append}"])# GIT_CONF_APPEND_LINE
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22#
23# GIT_ARG_SET_PATH(PROGRAM)
24# -------------------------
25# Provide --with-PROGRAM=PATH option to set PATH to PROGRAM
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26# Optional second argument allows setting NO_PROGRAM=YesPlease if
27# --without-PROGRAM version used.
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28AC_DEFUN([GIT_ARG_SET_PATH],
29[AC_ARG_WITH([$1],
30 [AS_HELP_STRING([--with-$1=PATH],
31 [provide PATH to $1])],
f22cd7fc 32 [GIT_CONF_APPEND_PATH($1,$2)],[])
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33])# GIT_ARG_SET_PATH
34#
35# GIT_CONF_APPEND_PATH(PROGRAM)
36# ------------------------------
37# Parse --with-PROGRAM=PATH option to set PROGRAM_PATH=PATH
38# Used by GIT_ARG_SET_PATH(PROGRAM)
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39# Optional second argument allows setting NO_PROGRAM=YesPlease if
40# --without-PROGRAM is used.
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41AC_DEFUN([GIT_CONF_APPEND_PATH],
42[PROGRAM=m4_toupper($1); \
43if test "$withval" = "no"; then \
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44 if test -n "$2"; then \
45 m4_toupper($1)_PATH=$withval; \
46 AC_MSG_NOTICE([Disabling use of ${PROGRAM}]); \
47 GIT_CONF_APPEND_LINE(NO_${PROGRAM}=YesPlease); \
48 GIT_CONF_APPEND_LINE(${PROGRAM}_PATH=); \
49 else \
50 AC_MSG_ERROR([You cannot use git without $1]); \
51 fi; \
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52else \
53 if test "$withval" = "yes"; then \
54 AC_MSG_WARN([You should provide path for --with-$1=PATH]); \
55 else \
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56 m4_toupper($1)_PATH=$withval; \
57 AC_MSG_NOTICE([Setting m4_toupper($1)_PATH to $withval]); \
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58 GIT_CONF_APPEND_LINE(${PROGRAM}_PATH=$withval); \
59 fi; \
60fi; \
61]) # GIT_CONF_APPEND_PATH
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62#
63# GIT_PARSE_WITH(PACKAGE)
64# -----------------------
65# For use in AC_ARG_WITH action-if-found, for packages default ON.
66# * Set NO_PACKAGE=YesPlease for --without-PACKAGE
67# * Set PACKAGEDIR=PATH for --with-PACKAGE=PATH
68# * Unset NO_PACKAGE for --with-PACKAGE without ARG
69AC_DEFUN([GIT_PARSE_WITH],
70[PACKAGE=m4_toupper($1); \
71if test "$withval" = "no"; then \
72 m4_toupper(NO_$1)=YesPlease; \
73elif test "$withval" = "yes"; then \
74 m4_toupper(NO_$1)=; \
75else \
76 m4_toupper(NO_$1)=; \
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77 m4_toupper($1)DIR=$withval; \
78 AC_MSG_NOTICE([Setting m4_toupper($1)DIR to $withval]); \
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79 GIT_CONF_APPEND_LINE(${PACKAGE}DIR=$withval); \
80fi \
81])# GIT_PARSE_WITH
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82#
83# GIT_PARSE_WITH_SET_MAKE_VAR(WITHNAME, VAR, HELP_TEXT)
84# ---------------------
85# Set VAR to the value specied by --with-WITHNAME.
86# No verification of arguments is performed, but warnings are issued
87# if either 'yes' or 'no' is specified.
88# HELP_TEXT is presented when --help is called.
89# This is a direct way to allow setting variables in the Makefile.
90AC_DEFUN([GIT_PARSE_WITH_SET_MAKE_VAR],
91[AC_ARG_WITH([$1],
92 [AS_HELP_STRING([--with-$1=VALUE], $3)],
93 if test -n "$withval"; then \
94 if test "$withval" = "yes" -o "$withval" = "no"; then \
95 AC_MSG_WARN([You likely do not want either 'yes' or 'no' as]
96 [a value for $1 ($2). Maybe you do...?]); \
97 fi; \
98 \
99 AC_MSG_NOTICE([Setting $2 to $withval]); \
100 GIT_CONF_APPEND_LINE($2=$withval); \
101 fi)])# GIT_PARSE_WITH_SET_MAKE_VAR
d3a6db98 102
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DS
103dnl
104dnl GIT_CHECK_FUNC(FUNCTION, IFTRUE, IFFALSE)
105dnl -----------------------------------------
106dnl Similar to AC_CHECK_FUNC, but on systems that do not generate
107dnl warnings for missing prototypes (e.g. FreeBSD when compiling without
108dnl -Wall), it does not work. By looking for function definition in
109dnl libraries, this problem can be worked around.
110AC_DEFUN([GIT_CHECK_FUNC],[AC_CHECK_FUNC([$1],[
111 AC_SEARCH_LIBS([$1],,
112 [$2],[$3])
113],[$3])])
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BW
114
115dnl
116dnl GIT_STASH_FLAGS(BASEPATH_VAR)
117dnl -----------------------------
118dnl Allow for easy stashing of LDFLAGS and CPPFLAGS before running
119dnl tests that may want to take user settings into account.
120AC_DEFUN([GIT_STASH_FLAGS],[
121if test -n "$1"; then
122 old_CPPFLAGS="$CPPFLAGS"
123 old_LDFLAGS="$LDFLAGS"
124 CPPFLAGS="-I$1/include $CPPFLAGS"
125 LDFLAGS="-L$1/$lib $LDFLAGS"
126fi
127])
128
129dnl
130dnl GIT_UNSTASH_FLAGS(BASEPATH_VAR)
131dnl -----------------------------
132dnl Restore the stashed *FLAGS values.
133AC_DEFUN([GIT_UNSTASH_FLAGS],[
134if test -n "$1"; then
135 CPPFLAGS="$old_CPPFLAGS"
136 LDFLAGS="$old_LDFLAGS"
137fi
138])
139
a20b4d89 140## Site configuration related to programs (before tests)
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141## --with-PACKAGE[=ARG] and --without-PACKAGE
142#
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143# Set lib to alternative name of lib directory (e.g. lib64)
144AC_ARG_WITH([lib],
145 [AS_HELP_STRING([--with-lib=ARG],
146 [ARG specifies alternative name for lib directory])],
3c307bfb 147 [if test "$withval" = "no" || test "$withval" = "yes"; then \
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148 AC_MSG_WARN([You should provide name for --with-lib=ARG]); \
149else \
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150 lib=$withval; \
151 AC_MSG_NOTICE([Setting lib to '$lib']); \
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152 GIT_CONF_APPEND_LINE(lib=$withval); \
153fi; \
154],[])
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155
156if test -z "$lib"; then
157 AC_MSG_NOTICE([Setting lib to 'lib' (the default)])
158 lib=lib
159fi
08df6a30 160
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161AC_ARG_ENABLE([pthreads],
162 [AS_HELP_STRING([--enable-pthreads=FLAGS],
163 [FLAGS is the value to pass to the compiler to enable POSIX Threads.]
164 [The default if FLAGS is not specified is to try first -pthread]
165 [and then -lpthread.]
166 [--without-pthreads will disable threading.])],
167[
168if test "x$enableval" = "xyes"; then
169 AC_MSG_NOTICE([Will try -pthread then -lpthread to enable POSIX Threads])
170elif test "x$enableval" != "xno"; then
171 PTHREAD_CFLAGS=$enableval
172 AC_MSG_NOTICE([Setting '$PTHREAD_CFLAGS' as the FLAGS to enable POSIX Threads])
173else
174 AC_MSG_NOTICE([POSIX Threads will be disabled.])
175 NO_PTHREADS=YesPlease
176 USER_NOPTHREAD=1
177fi],
178[
179 AC_MSG_NOTICE([Will try -pthread then -lpthread to enable POSIX Threads.])
180])
181
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182# Define option to enable JavaScript minification
183AC_ARG_ENABLE([jsmin],
184[AS_HELP_STRING([--enable-jsmin=PATH],
185 [PATH is the name of a JavaScript minifier or the absolute path to one.])],
186[
187 JSMIN=$enableval;
188 AC_MSG_NOTICE([Setting JSMIN to '$JSMIN' to enable JavaScript minifying])
189 GIT_CONF_APPEND_LINE(JSMIN=$enableval);
190])
191
192# Define option to enable CSS minification
193AC_ARG_ENABLE([cssmin],
194[AS_HELP_STRING([--enable-cssmin=PATH],
195 [PATH is the name of a CSS minifier or the absolute path to one.])],
196[
197 CSSMIN=$enableval;
198 AC_MSG_NOTICE([Setting CSSMIN to '$CSSMIN' to enable CSS minifying])
199 GIT_CONF_APPEND_LINE(CSSMIN=$enableval);
200])
201
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202## Site configuration (override autodetection)
203## --with-PACKAGE[=ARG] and --without-PACKAGE
204AC_MSG_NOTICE([CHECKS for site configuration])
205#
206# Define NO_SVN_TESTS if you want to skip time-consuming SVN interoperability
207# tests. These tests take up a significant amount of the total test time
208# but are not needed unless you plan to talk to SVN repos.
209#
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210# Define PPC_SHA1 environment variable when running make to make use of
211# a bundled SHA1 routine optimized for PowerPC.
212#
08df6a30 213# Define NO_OPENSSL environment variable if you do not have OpenSSL.
30ae47b4 214# This also implies BLK_SHA1.
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215#
216# Define OPENSSLDIR=/foo/bar if your openssl header and library files are in
217# /foo/bar/include and /foo/bar/lib directories.
218AC_ARG_WITH(openssl,
219AS_HELP_STRING([--with-openssl],[use OpenSSL library (default is YES)])
220AS_HELP_STRING([], [ARG can be prefix for openssl library and headers]),\
221GIT_PARSE_WITH(openssl))
222#
223# Define NO_CURL if you do not have curl installed. git-http-pull and
224# git-http-push are not built, and you cannot use http:// and https://
225# transports.
226#
227# Define CURLDIR=/foo/bar if your curl header and library files are in
228# /foo/bar/include and /foo/bar/lib directories.
229AC_ARG_WITH(curl,
230AS_HELP_STRING([--with-curl],[support http(s):// transports (default is YES)])
231AS_HELP_STRING([], [ARG can be also prefix for curl library and headers]),
232GIT_PARSE_WITH(curl))
233#
234# Define NO_EXPAT if you do not have expat installed. git-http-push is
235# not built, and you cannot push using http:// and https:// transports.
236#
237# Define EXPATDIR=/foo/bar if your expat header and library files are in
238# /foo/bar/include and /foo/bar/lib directories.
239AC_ARG_WITH(expat,
240AS_HELP_STRING([--with-expat],
241[support git-push using http:// and https:// transports via WebDAV (default is YES)])
242AS_HELP_STRING([], [ARG can be also prefix for expat library and headers]),
243GIT_PARSE_WITH(expat))
244#
245# Define NO_FINK if you are building on Darwin/Mac OS X, have Fink
246# installed in /sw, but don't want GIT to link against any libraries
247# installed there. If defined you may specify your own (or Fink's)
248# include directories and library directories by defining CFLAGS
249# and LDFLAGS appropriately.
250#
251# Define NO_DARWIN_PORTS if you are building on Darwin/Mac OS X,
252# have DarwinPorts installed in /opt/local, but don't want GIT to
253# link against any libraries installed there. If defined you may
254# specify your own (or DarwinPort's) include directories and
255# library directories by defining CFLAGS and LDFLAGS appropriately.
256#
257# Define NO_MMAP if you want to avoid mmap.
258#
259# Define NO_ICONV if your libc does not properly support iconv.
260AC_ARG_WITH(iconv,
261AS_HELP_STRING([--without-iconv],
262[if your architecture doesn't properly support iconv])
263AS_HELP_STRING([--with-iconv=PATH],
264[PATH is prefix for libiconv library and headers])
265AS_HELP_STRING([],
266[used only if you need linking with libiconv]),
267GIT_PARSE_WITH(iconv))
268
269## --enable-FEATURE[=ARG] and --disable-FEATURE
270#
271# Define USE_NSEC below if you want git to care about sub-second file mtimes
272# and ctimes. Note that you need recent glibc (at least 2.2.4) for this, and
273# it will BREAK YOUR LOCAL DIFFS! show-diff and anything using it will likely
274# randomly break unless your underlying filesystem supports those sub-second
275# times (my ext3 doesn't).
276#
277# Define USE_STDEV below if you want git to care about the underlying device
278# change being considered an inode change from the update-index perspective.
279
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280#
281# Allow user to set ETC_GITCONFIG variable
282GIT_PARSE_WITH_SET_MAKE_VAR(gitconfig, ETC_GITCONFIG,
283 Use VALUE instead of /etc/gitconfig as the
284 global git configuration file.
285 If VALUE is not fully qualified it will be interpretted
286 as a path relative to the computed prefix at runtime.)
287
288#
289# Allow user to set the default pager
290GIT_PARSE_WITH_SET_MAKE_VAR(pager, DEFAULT_PAGER,
291 Use VALUE as the fall-back pager instead of 'less'.
292 This is used by things like 'git log' when the user
293 does not specify a pager to use through alternate
294 methods. eg: /usr/bin/pager)
295#
296# Allow user to set the default editor
297GIT_PARSE_WITH_SET_MAKE_VAR(editor, DEFAULT_EDITOR,
298 Use VALUE as the fall-back editor instead of 'vi'.
299 This is used by things like 'git commit' when the user
300 does not specify a preferred editor through other
301 methods. eg: /usr/bin/editor)
302
10861bea 303#
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304# Define SHELL_PATH to provide path to shell.
305GIT_ARG_SET_PATH(shell)
306#
307# Define PERL_PATH to provide path to Perl.
308GIT_ARG_SET_PATH(perl)
309#
d4e1b47a 310# Define PYTHON_PATH to provide path to Python.
dc78250f 311GIT_ARG_SET_PATH(python, allow-without)
d4e1b47a 312#
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313# Define ZLIB_PATH to provide path to zlib.
314GIT_ARG_SET_PATH(zlib)
315#
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316# Declare the with-tcltk/without-tcltk options.
317AC_ARG_WITH(tcltk,
318AS_HELP_STRING([--with-tcltk],[use Tcl/Tk GUI (default is YES)])
319AS_HELP_STRING([],[ARG is the full path to the Tcl/Tk interpreter.])
320AS_HELP_STRING([],[Bare --with-tcltk will make the GUI part only if])
321AS_HELP_STRING([],[Tcl/Tk interpreter will be found in a system.]),\
322GIT_PARSE_WITH(tcltk))
323#
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324
325
633b4239 326## Checks for programs.
fd22c027 327AC_MSG_NOTICE([CHECKS for programs])
f6719572 328#
60a144f2 329AC_PROG_CC([cc gcc])
798a9450 330# which switch to pass runtime path to dynamic libraries to the linker
a1a587ef 331AC_CACHE_CHECK([if linker supports -R], git_cv_ld_dashr, [
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332 SAVE_LDFLAGS="${LDFLAGS}"
333 LDFLAGS="${SAVE_LDFLAGS} -R /"
a1a587ef 334 AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [git_cv_ld_dashr=yes], [git_cv_ld_dashr=no])
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335 LDFLAGS="${SAVE_LDFLAGS}"
336])
a1a587ef 337if test "$git_cv_ld_dashr" = "yes"; then
798a9450
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338 AC_SUBST(CC_LD_DYNPATH, [-R])
339else
a1a587ef 340 AC_CACHE_CHECK([if linker supports -Wl,-rpath,], git_cv_ld_wl_rpath, [
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341 SAVE_LDFLAGS="${LDFLAGS}"
342 LDFLAGS="${SAVE_LDFLAGS} -Wl,-rpath,/"
a1a587ef 343 AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [git_cv_ld_wl_rpath=yes], [git_cv_ld_wl_rpath=no])
50a4b352 344 LDFLAGS="${SAVE_LDFLAGS}"
798a9450 345 ])
a1a587ef 346 if test "$git_cv_ld_wl_rpath" = "yes"; then
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347 AC_SUBST(CC_LD_DYNPATH, [-Wl,-rpath,])
348 else
a1a587ef 349 AC_CACHE_CHECK([if linker supports -rpath], git_cv_ld_rpath, [
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350 SAVE_LDFLAGS="${LDFLAGS}"
351 LDFLAGS="${SAVE_LDFLAGS} -rpath /"
a1a587ef 352 AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [git_cv_ld_rpath=yes], [git_cv_ld_rpath=no])
50a4b352 353 LDFLAGS="${SAVE_LDFLAGS}"
798a9450 354 ])
a1a587ef 355 if test "$git_cv_ld_rpath" = "yes"; then
798a9450
GF
356 AC_SUBST(CC_LD_DYNPATH, [-rpath])
357 else
358 AC_MSG_WARN([linker does not support runtime path to dynamic libraries])
359 fi
360 fi
361fi
fd22c027 362#AC_PROG_INSTALL # needs install-sh or install.sh in sources
96e24abc 363AC_CHECK_TOOLS(AR, [gar ar], :)
fd22c027 364AC_CHECK_PROGS(TAR, [gtar tar])
d1b1a919 365AC_CHECK_PROGS(DIFF, [gnudiff gdiff diff])
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366# TCLTK_PATH will be set to some value if we want Tcl/Tk
367# or will be empty otherwise.
368if test -z "$NO_TCLTK"; then
369 if test "$with_tcltk" = ""; then
370 # No Tcl/Tk switches given. Do not check for Tcl/Tk, use bare 'wish'.
371 TCLTK_PATH=wish
372 AC_SUBST(TCLTK_PATH)
373 elif test "$with_tcltk" = "yes"; then
374 # Tcl/Tk check requested.
375 AC_CHECK_PROGS(TCLTK_PATH, [wish], )
68daee08 376 else
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377 AC_MSG_RESULT([Using Tcl/Tk interpreter $with_tcltk])
378 TCLTK_PATH="$with_tcltk"
379 AC_SUBST(TCLTK_PATH)
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380 fi
381fi
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382AC_CHECK_PROGS(ASCIIDOC, [asciidoc])
383if test -n "$ASCIIDOC"; then
384 AC_MSG_CHECKING([for asciidoc version])
29adc8ba 385 asciidoc_version=`$ASCIIDOC --version 2>/dev/null`
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386 case "${asciidoc_version}" in
387 asciidoc' '8*)
388 ASCIIDOC8=YesPlease
389 AC_MSG_RESULT([${asciidoc_version} > 7])
390 ;;
391 asciidoc' '7*)
392 ASCIIDOC8=
393 AC_MSG_RESULT([${asciidoc_version}])
394 ;;
395 *)
396 ASCIIDOC8=
397 AC_MSG_RESULT([${asciidoc_version} (unknown)])
398 ;;
399 esac
400fi
401AC_SUBST(ASCIIDOC8)
402
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403
404## Checks for libraries.
ebdf5321 405AC_MSG_NOTICE([CHECKS for libraries])
f6719572 406#
633b4239 407# Define NO_OPENSSL environment variable if you do not have OpenSSL.
ebdf5321 408# Define NEEDS_SSL_WITH_CRYPTO if you need -lcrypto with -lssl (Darwin).
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409
410GIT_STASH_FLAGS($OPENSSLDIR)
411
d5c31a1c 412AC_CHECK_LIB([crypto], [SHA1_Init],
424adc50 413[NEEDS_SSL_WITH_CRYPTO=],
3068f6c4 414[AC_CHECK_LIB([ssl], [SHA1_Init],
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415 [NEEDS_SSL_WITH_CRYPTO=YesPlease],
416 [NEEDS_SSL_WITH_CRYPTO= NO_OPENSSL=YesPlease])])
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417
418GIT_UNSTASH_FLAGS($OPENSSLDIR)
419
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420AC_SUBST(NEEDS_SSL_WITH_CRYPTO)
421AC_SUBST(NO_OPENSSL)
310386f0 422
f6719572 423#
8da1e212 424# Define NO_CURL if you do not have libcurl installed. git-http-pull and
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425# git-http-push are not built, and you cannot use http:// and https://
426# transports.
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427
428GIT_STASH_FLAGS($CURLDIR)
429
d5c31a1c 430AC_CHECK_LIB([curl], [curl_global_init],
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431[NO_CURL=],
432[NO_CURL=YesPlease])
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433
434GIT_UNSTASH_FLAGS($CURLDIR)
435
424adc50 436AC_SUBST(NO_CURL)
310386f0 437
f6719572 438#
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439# Define NO_EXPAT if you do not have expat installed. git-http-push is
440# not built, and you cannot push using http:// and https:// transports.
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441
442GIT_STASH_FLAGS($EXPATDIR)
443
d5c31a1c 444AC_CHECK_LIB([expat], [XML_ParserCreate],
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445[NO_EXPAT=],
446[NO_EXPAT=YesPlease])
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447
448GIT_UNSTASH_FLAGS($EXPATDIR)
449
424adc50 450AC_SUBST(NO_EXPAT)
310386f0 451
f6719572 452#
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453# Define NEEDS_LIBICONV if linking with libc is not enough (Darwin and
454# some Solaris installations).
6ff88de7 455# Define NO_ICONV if neither libc nor libiconv support iconv.
310386f0 456
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457if test -z "$NO_ICONV"; then
458
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459GIT_STASH_FLAGS($ICONVDIR)
460
e63ccb84
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461AC_DEFUN([ICONVTEST_SRC], [
462#include <iconv.h>
463
464int main(void)
465{
466 iconv_open("", "");
467 return 0;
468}
469])
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BW
470
471if test -n "$ICONVDIR"; then
472 lib_order="-liconv -lc"
473else
474 lib_order="-lc -liconv"
475fi
476
477NO_ICONV=YesPlease
478
479for l in $lib_order; do
480 if test "$l" = "-liconv"; then
481 NEEDS_LIBICONV=YesPlease
482 else
483 NEEDS_LIBICONV=
484 fi
485
486 old_LIBS="$LIBS"
487 LIBS="$LIBS $l"
488 AC_MSG_CHECKING([for iconv in $l])
489 AC_LINK_IFELSE(ICONVTEST_SRC,
e63ccb84 490 [AC_MSG_RESULT([yes])
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491 NO_ICONV=
492 break],
493 [AC_MSG_RESULT([no])])
494 LIBS="$old_LIBS"
495done
496
497#in case of break
498LIBS="$old_LIBS"
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499
500GIT_UNSTASH_FLAGS($ICONVDIR)
501
424adc50 502AC_SUBST(NEEDS_LIBICONV)
baf1219a 503AC_SUBST(NO_ICONV)
310386f0 504
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MN
505if test -n "$NO_ICONV"; then
506 NEEDS_LIBICONV=
507fi
508
509fi
510
f6719572 511#
609a2289 512# Define NO_DEFLATE_BOUND if deflateBound is missing from zlib.
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513
514GIT_STASH_FLAGS($ZLIB_PATH)
515
609a2289
DS
516AC_DEFUN([ZLIBTEST_SRC], [
517#include <zlib.h>
518
519int main(void)
520{
521 deflateBound(0, 0);
522 return 0;
523}
524])
525AC_MSG_CHECKING([for deflateBound in -lz])
526old_LIBS="$LIBS"
527LIBS="$LIBS -lz"
528AC_LINK_IFELSE(ZLIBTEST_SRC,
529 [AC_MSG_RESULT([yes])],
530 [AC_MSG_RESULT([no])
531 NO_DEFLATE_BOUND=yes])
532LIBS="$old_LIBS"
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533
534GIT_UNSTASH_FLAGS($ZLIB_PATH)
535
609a2289 536AC_SUBST(NO_DEFLATE_BOUND)
310386f0 537
609a2289 538#
633b4239
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539# Define NEEDS_SOCKET if linking with libc is not enough (SunOS,
540# Patrick Mauritz).
d5c31a1c 541AC_CHECK_LIB([c], [socket],
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542[NEEDS_SOCKET=],
543[NEEDS_SOCKET=YesPlease])
544AC_SUBST(NEEDS_SOCKET)
d1b9944d 545test -n "$NEEDS_SOCKET" && LIBS="$LIBS -lsocket"
633b4239 546
8fccb009
RW
547#
548# Define NEEDS_RESOLV if linking with -lnsl and/or -lsocket is not enough.
549# Notably on Solaris hstrerror resides in libresolv and on Solaris 7
550# inet_ntop and inet_pton additionally reside there.
a1142892 551AC_CHECK_LIB([c], [hstrerror],
8fccb009
RW
552[NEEDS_RESOLV=],
553[NEEDS_RESOLV=YesPlease])
554AC_SUBST(NEEDS_RESOLV)
555test -n "$NEEDS_RESOLV" && LIBS="$LIBS -lresolv"
633b4239 556
a1142892 557AC_CHECK_LIB([c], [basename],
ecc395c1
BC
558[NEEDS_LIBGEN=],
559[NEEDS_LIBGEN=YesPlease])
560AC_SUBST(NEEDS_LIBGEN)
561test -n "$NEEDS_LIBGEN" && LIBS="$LIBS -lgen"
562
633b4239 563## Checks for header files.
0f7a9c9b
JN
564AC_MSG_NOTICE([CHECKS for header files])
565#
3cf32374
JN
566# Define NO_SYS_SELECT_H if you don't have sys/select.h.
567AC_CHECK_HEADER([sys/select.h],
568[NO_SYS_SELECT_H=],
569[NO_SYS_SELECT_H=UnfortunatelyYes])
570AC_SUBST(NO_SYS_SELECT_H)
571#
0f7a9c9b
JN
572# Define OLD_ICONV if your library has an old iconv(), where the second
573# (input buffer pointer) parameter is declared with type (const char **).
574AC_DEFUN([OLDICONVTEST_SRC], [[
575#include <iconv.h>
576
577extern size_t iconv(iconv_t cd,
578 char **inbuf, size_t *inbytesleft,
579 char **outbuf, size_t *outbytesleft);
580
581int main(void)
582{
583 return 0;
584}
585]])
a8304f7a
BW
586
587GIT_STASH_FLAGS($ICONVDIR)
588
0f7a9c9b
JN
589AC_MSG_CHECKING([for old iconv()])
590AC_COMPILE_IFELSE(OLDICONVTEST_SRC,
591 [AC_MSG_RESULT([no])],
592 [AC_MSG_RESULT([yes])
593 OLD_ICONV=UnfortunatelyYes])
633b4239 594
a8304f7a
BW
595GIT_UNSTASH_FLAGS($ICONVDIR)
596
597AC_SUBST(OLD_ICONV)
633b4239
JN
598
599## Checks for typedefs, structures, and compiler characteristics.
eb0f255d 600AC_MSG_NOTICE([CHECKS for typedefs, structures, and compiler characteristics])
f6719572 601#
633b4239 602# Define NO_D_INO_IN_DIRENT if you don't have d_ino in your struct dirent.
d5c31a1c 603AC_CHECK_MEMBER(struct dirent.d_ino,
424adc50
JN
604[NO_D_INO_IN_DIRENT=],
605[NO_D_INO_IN_DIRENT=YesPlease],
eb0f255d 606[#include <dirent.h>])
424adc50 607AC_SUBST(NO_D_INO_IN_DIRENT)
f6719572 608#
633b4239
JN
609# Define NO_D_TYPE_IN_DIRENT if your platform defines DT_UNKNOWN but lacks
610# d_type in struct dirent (latest Cygwin -- will be fixed soonish).
d5c31a1c 611AC_CHECK_MEMBER(struct dirent.d_type,
424adc50
JN
612[NO_D_TYPE_IN_DIRENT=],
613[NO_D_TYPE_IN_DIRENT=YesPlease],
eb0f255d 614[#include <dirent.h>])
424adc50 615AC_SUBST(NO_D_TYPE_IN_DIRENT)
f6719572 616#
633b4239
JN
617# Define NO_SOCKADDR_STORAGE if your platform does not have struct
618# sockaddr_storage.
d5c31a1c 619AC_CHECK_TYPE(struct sockaddr_storage,
424adc50 620[NO_SOCKADDR_STORAGE=],
ab5573ae
DS
621[NO_SOCKADDR_STORAGE=YesPlease],[
622#include <sys/types.h>
623#include <sys/socket.h>
624])
424adc50
JN
625AC_SUBST(NO_SOCKADDR_STORAGE)
626#
8c6ab35e
JH
627# Define NO_IPV6 if you lack IPv6 support and getaddrinfo().
628AC_CHECK_TYPE([struct addrinfo],[
1689c5de 629 GIT_CHECK_FUNC([getaddrinfo],
424adc50
JN
630 [NO_IPV6=],
631 [NO_IPV6=YesPlease])
632],[NO_IPV6=YesPlease],[
8c6ab35e
JH
633#include <sys/types.h>
634#include <sys/socket.h>
635#include <netdb.h>
636])
424adc50 637AC_SUBST(NO_IPV6)
656517b9
JN
638#
639# Define NO_C99_FORMAT if your formatted IO functions (printf/scanf et.al.)
640# do not support the 'size specifiers' introduced by C99, namely ll, hh,
641# j, z, t. (representing long long int, char, intmax_t, size_t, ptrdiff_t).
642# some C compilers supported these specifiers prior to C99 as an extension.
f685d07d
JN
643AC_CACHE_CHECK([whether formatted IO functions support C99 size specifiers],
644 [ac_cv_c_c99_format],
656517b9
JN
645[# Actually git uses only %z (%zu) in alloc.c, and %t (%td) in mktag.c
646AC_RUN_IFELSE(
647 [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
648 [[char buf[64];
649 if (sprintf(buf, "%lld%hhd%jd%zd%td", (long long int)1, (char)2, (intmax_t)3, (size_t)4, (ptrdiff_t)5) != 5)
3c307bfb 650 return 1;
656517b9 651 else if (strcmp(buf, "12345"))
3c307bfb 652 return 2;]])],
656517b9
JN
653 [ac_cv_c_c99_format=yes],
654 [ac_cv_c_c99_format=no])
655])
656if test $ac_cv_c_c99_format = no; then
424adc50 657 NO_C99_FORMAT=YesPlease
d5c31a1c 658else
424adc50 659 NO_C99_FORMAT=
656517b9 660fi
424adc50 661AC_SUBST(NO_C99_FORMAT)
c4582f93 662#
8ce1f243
MR
663# Define FREAD_READS_DIRECTORIES if your are on a system which succeeds
664# when attempting to read from an fopen'ed directory.
665AC_CACHE_CHECK([whether system succeeds to read fopen'ed directory],
666 [ac_cv_fread_reads_directories],
667[
668AC_RUN_IFELSE(
669 [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
670 [[char c;
671 FILE *f = fopen(".", "r");
672 return f && fread(&c, 1, 1, f)]])],
673 [ac_cv_fread_reads_directories=no],
674 [ac_cv_fread_reads_directories=yes])
675])
676if test $ac_cv_fread_reads_directories = yes; then
677 FREAD_READS_DIRECTORIES=UnfortunatelyYes
678else
679 FREAD_READS_DIRECTORIES=
680fi
681AC_SUBST(FREAD_READS_DIRECTORIES)
682#
c4582f93
MR
683# Define SNPRINTF_RETURNS_BOGUS if your are on a system which snprintf()
684# or vsnprintf() return -1 instead of number of characters which would
685# have been written to the final string if enough space had been available.
686AC_CACHE_CHECK([whether snprintf() and/or vsnprintf() return bogus value],
687 [ac_cv_snprintf_returns_bogus],
688[
689AC_RUN_IFELSE(
690 [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT
691 #include "stdarg.h"
692
693 int test_vsnprintf(char *str, size_t maxsize, const char *format, ...)
694 {
695 int ret;
696 va_list ap;
697 va_start(ap, format);
698 ret = vsnprintf(str, maxsize, format, ap);
699 va_end(ap);
700 return ret;
701 }],
702 [[char buf[6];
703 if (test_vsnprintf(buf, 3, "%s", "12345") != 5
704 || strcmp(buf, "12")) return 1;
705 if (snprintf(buf, 3, "%s", "12345") != 5
706 || strcmp(buf, "12")) return 1]])],
707 [ac_cv_snprintf_returns_bogus=no],
708 [ac_cv_snprintf_returns_bogus=yes])
709])
710if test $ac_cv_snprintf_returns_bogus = yes; then
711 SNPRINTF_RETURNS_BOGUS=UnfortunatelyYes
712else
713 SNPRINTF_RETURNS_BOGUS=
714fi
715AC_SUBST(SNPRINTF_RETURNS_BOGUS)
633b4239 716
a20b4d89 717
633b4239 718## Checks for library functions.
1bbbadbc
JN
719## (in default C library and libraries checked by AC_CHECK_LIB)
720AC_MSG_NOTICE([CHECKS for library functions])
f6719572 721#
e1c06886
DA
722# Define NO_LIBGEN_H if you don't have libgen.h.
723AC_CHECK_HEADER([libgen.h],
724[NO_LIBGEN_H=],
725[NO_LIBGEN_H=YesPlease])
726AC_SUBST(NO_LIBGEN_H)
727#
633b4239 728# Define NO_STRCASESTR if you don't have strcasestr.
1689c5de 729GIT_CHECK_FUNC(strcasestr,
424adc50
JN
730[NO_STRCASESTR=],
731[NO_STRCASESTR=YesPlease])
732AC_SUBST(NO_STRCASESTR)
f6719572 733#
24397556 734# Define NO_MEMMEM if you don't have memmem.
1689c5de 735GIT_CHECK_FUNC(memmem,
24397556
JN
736[NO_MEMMEM=],
737[NO_MEMMEM=YesPlease])
738AC_SUBST(NO_MEMMEM)
739#
633b4239 740# Define NO_STRLCPY if you don't have strlcpy.
1689c5de 741GIT_CHECK_FUNC(strlcpy,
424adc50
JN
742[NO_STRLCPY=],
743[NO_STRLCPY=YesPlease])
744AC_SUBST(NO_STRLCPY)
f6719572 745#
0bc3e781
DS
746# Define NO_UINTMAX_T if your platform does not have uintmax_t
747AC_CHECK_TYPE(uintmax_t,
748[NO_UINTMAX_T=],
749[NO_UINTMAX_T=YesPlease],[
750#include <inttypes.h>
751])
752AC_SUBST(NO_UINTMAX_T)
753#
24397556 754# Define NO_STRTOUMAX if you don't have strtoumax in the C library.
1689c5de 755GIT_CHECK_FUNC(strtoumax,
24397556
JN
756[NO_STRTOUMAX=],
757[NO_STRTOUMAX=YesPlease])
758AC_SUBST(NO_STRTOUMAX)
759#
633b4239 760# Define NO_SETENV if you don't have setenv in the C library.
1689c5de 761GIT_CHECK_FUNC(setenv,
424adc50
JN
762[NO_SETENV=],
763[NO_SETENV=YesPlease])
764AC_SUBST(NO_SETENV)
f6719572 765#
bfa8fccf 766# Define NO_UNSETENV if you don't have unsetenv in the C library.
1689c5de 767GIT_CHECK_FUNC(unsetenv,
bfa8fccf
JN
768[NO_UNSETENV=],
769[NO_UNSETENV=YesPlease])
770AC_SUBST(NO_UNSETENV)
771#
24397556 772# Define NO_MKDTEMP if you don't have mkdtemp in the C library.
1689c5de 773GIT_CHECK_FUNC(mkdtemp,
24397556
JN
774[NO_MKDTEMP=],
775[NO_MKDTEMP=YesPlease])
776AC_SUBST(NO_MKDTEMP)
777#
0620b39b
DA
778# Define NO_MKSTEMPS if you don't have mkstemps in the C library.
779GIT_CHECK_FUNC(mkstemps,
780[NO_MKSTEMPS=],
781[NO_MKSTEMPS=YesPlease])
782AC_SUBST(NO_MKSTEMPS)
783#
784#
633b4239
JN
785# Define NO_MMAP if you want to avoid mmap.
786#
633b4239
JN
787# Define NO_ICONV if your libc does not properly support iconv.
788
789
790## Other checks.
791# Define USE_PIC if you need the main git objects to be built with -fPIC
792# in order to build and link perl/Git.so. x86-64 seems to need this.
793#
794# Define NO_SYMLINK_HEAD if you never want .git/HEAD to be a symbolic link.
795# Enable it on Windows. By default, symrefs are still used.
20f7a398 796#
7eb151d6 797# Define NO_PTHREADS if we do not have pthreads.
46059cc6 798#
7eb151d6 799# Define PTHREAD_LIBS to the linker flag used for Pthread support.
1973b0d7
BW
800AC_DEFUN([PTHREADTEST_SRC], [
801#include <pthread.h>
802
803int main(void)
804{
805 pthread_mutex_t test_mutex;
48793cf4
GV
806 int retcode = 0;
807 retcode |= pthread_mutex_init(&test_mutex,(void *)0);
808 retcode |= pthread_mutex_lock(&test_mutex);
809 retcode |= pthread_mutex_unlock(&test_mutex);
810 return retcode;
1973b0d7
BW
811}
812])
813
814dnl AC_LANG_CONFTEST([AC_LANG_PROGRAM(
815dnl [[#include <pthread.h>]],
816dnl [[pthread_mutex_t test_mutex;]]
817dnl )])
818
819NO_PTHREADS=UnfortunatelyYes
1973b0d7
BW
820PTHREAD_LIBS=
821
822if test -n "$USER_NOPTHREAD"; then
823 AC_MSG_NOTICE([Skipping POSIX Threads at user request.])
824# handle these separately since PTHREAD_CFLAGS could be '-lpthreads
825# -D_REENTRANT' or some such.
826elif test -z "$PTHREAD_CFLAGS"; then
48793cf4
GV
827 threads_found=no
828 for opt in -mt -pthread -lpthread; do
1973b0d7
BW
829 old_CFLAGS="$CFLAGS"
830 CFLAGS="$opt $CFLAGS"
831 AC_MSG_CHECKING([Checking for POSIX Threads with '$opt'])
832 AC_LINK_IFELSE(PTHREADTEST_SRC,
833 [AC_MSG_RESULT([yes])
834 NO_PTHREADS=
835 PTHREAD_LIBS="$opt"
48793cf4
GV
836 PTHREAD_CFLAGS="$opt"
837 threads_found=yes
1973b0d7
BW
838 break
839 ],
840 [AC_MSG_RESULT([no])])
841 CFLAGS="$old_CFLAGS"
842 done
48793cf4
GV
843 if test $threads_found != yes; then
844 AC_CHECK_LIB([pthread], [pthread_create],
845 [PTHREAD_LIBS="-lpthread"],
846 [NO_PTHREADS=UnfortunatelyYes])
847 fi
20f7a398 848else
1973b0d7
BW
849 old_CFLAGS="$CFLAGS"
850 CFLAGS="$PTHREAD_CFLAGS $CFLAGS"
851 AC_MSG_CHECKING([Checking for POSIX Threads with '$PTHREAD_CFLAGS'])
852 AC_LINK_IFELSE(PTHREADTEST_SRC,
853 [AC_MSG_RESULT([yes])
854 NO_PTHREADS=
855 PTHREAD_LIBS="$PTHREAD_CFLAGS"
1973b0d7
BW
856 ],
857 [AC_MSG_RESULT([no])])
858
859 CFLAGS="$old_CFLAGS"
20f7a398 860fi
1973b0d7
BW
861
862CFLAGS="$old_CFLAGS"
863
48793cf4 864AC_SUBST(PTHREAD_CFLAGS)
20f7a398 865AC_SUBST(PTHREAD_LIBS)
46059cc6 866AC_SUBST(NO_PTHREADS)
633b4239 867
633b4239 868## Output files
d3a6db98 869AC_CONFIG_FILES(["${config_file}":"${config_in}":"${config_append}"])
55667714 870AC_OUTPUT
d3a6db98 871
f6719572 872
d3a6db98
JN
873## Cleanup
874rm -f "${config_append}"