autoconf: Error out on --without-shell and --without-perl
[git/git.git] / configure.ac
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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
26AC_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)
37AC_DEFUN([GIT_CONF_APPEND_PATH],
38[PROGRAM=m4_toupper($1); \
39if test "$withval" = "no"; then \
b52b1d43 40 AC_MSG_ERROR([You cannot use git without $1]); \
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41else \
42 if test "$withval" = "yes"; then \
43 AC_MSG_WARN([You should provide path for --with-$1=PATH]); \
44 else \
45 GIT_CONF_APPEND_LINE(${PROGRAM}_PATH=$withval); \
46 fi; \
47fi; \
48]) # GIT_CONF_APPEND_PATH
d3a6db98 49
633b4239 50
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51## Site configuration
52## --with-PACKAGE[=ARG] and --without-PACKAGE
53#
465e649d 54# Define NO_SVN_TESTS if you want to skip time-consuming SVN interoperability
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55# tests. These tests take up a significant amount of the total test time
56# but are not needed unless you plan to talk to SVN repos.
57#
58# Define MOZILLA_SHA1 environment variable when running make to make use of
59# a bundled SHA1 routine coming from Mozilla. It is GPL'd and should be fast
60# on non-x86 architectures (e.g. PowerPC), while the OpenSSL version (default
61# choice) has very fast version optimized for i586.
62#
63# Define PPC_SHA1 environment variable when running make to make use of
64# a bundled SHA1 routine optimized for PowerPC.
65#
66# Define ARM_SHA1 environment variable when running make to make use of
67# a bundled SHA1 routine optimized for ARM.
68#
69# Define NO_OPENSSL environment variable if you do not have OpenSSL.
70# This also implies MOZILLA_SHA1.
71#
72# Define NO_CURL if you do not have curl installed. git-http-pull and
73# git-http-push are not built, and you cannot use http:// and https://
74# transports.
75#
76# Define CURLDIR=/foo/bar if your curl header and library files are in
77# /foo/bar/include and /foo/bar/lib directories.
78#
79# Define NO_EXPAT if you do not have expat installed. git-http-push is
80# not built, and you cannot push using http:// and https:// transports.
81#
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82# Define NO_FINK if you are building on Darwin/Mac OS X, have Fink
83# installed in /sw, but don't want GIT to link against any libraries
84# installed there. If defined you may specify your own (or Fink's)
85# include directories and library directories by defining CFLAGS
86# and LDFLAGS appropriately.
87#
88# Define NO_DARWIN_PORTS if you are building on Darwin/Mac OS X,
89# have DarwinPorts installed in /opt/local, but don't want GIT to
90# link against any libraries installed there. If defined you may
91# specify your own (or DarwinPort's) include directories and
92# library directories by defining CFLAGS and LDFLAGS appropriately.
93#
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94# Define NO_MMAP if you want to avoid mmap.
95#
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96# Define SHELL_PATH to provide path to shell.
97GIT_ARG_SET_PATH(shell)
98#
99# Define PERL_PATH to provide path to Perl.
100GIT_ARG_SET_PATH(perl)
101#
102# Define NO_PYTHON if you want to lose all benefits of the recursive merge.
103# Define PYTHON_PATH to provide path to Python.
104AC_ARG_WITH(python,[AS_HELP_STRING([--with-python=PATH], [provide PATH to python])
105AS_HELP_STRING([--no-python], [don't use python scripts])],
106 [if test "$withval" = "no"; then \
107 NO_PYTHON=YesPlease; \
108 elif test "$withval" != "yes"; then \
109 PYTHON_PATH=$withval; \
110 fi; \
111 ])
112AC_SUBST(NO_PYTHON)
113AC_SUBST(PYTHON_PATH)
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114#
115## --enable-FEATURE[=ARG] and --disable-FEATURE
116# Define COLLISION_CHECK below if you believe that SHA1's
117# 1461501637330902918203684832716283019655932542976 hashes do not give you
118# sufficient guarantee that no collisions between objects will ever happen.
119#
120# Define USE_NSEC below if you want git to care about sub-second file mtimes
121# and ctimes. Note that you need recent glibc (at least 2.2.4) for this, and
122# it will BREAK YOUR LOCAL DIFFS! show-diff and anything using it will likely
123# randomly break unless your underlying filesystem supports those sub-second
124# times (my ext3 doesn't).
125#
126# Define USE_STDEV below if you want git to care about the underlying device
127# change being considered an inode change from the update-cache perspective.
128
129
633b4239 130## Checks for programs.
fd22c027 131AC_MSG_NOTICE([CHECKS for programs])
f6719572 132#
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133AC_PROG_CC
134#AC_PROG_INSTALL # needs install-sh or install.sh in sources
135AC_CHECK_TOOL(AR, ar, :)
136AC_CHECK_PROGS(TAR, [gtar tar])
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137#
138# Define NO_PYTHON if you want to lose all benefits of the recursive merge.
139# Define PYTHON_PATH to provide path to Python.
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140if test -z "$NO_PYTHON"; then
141 AC_PATH_PROGS(PYTHON_PATH, [python2.4 python2.3 python2 python])
142 if test -n "$PYTHON_PATH"; then
143 GIT_CONF_APPEND_LINE([PYTHON_PATH=@PYTHON_PATH@])
144 else
145 GIT_CONF_APPEND_LINE([NO_PYTHON=@NO_PYTHON@])
146 fi
147else
148 GIT_CONF_APPEND_LINE([NO_PYTHON=@NO_PYTHON@])
149fi
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150
151
152## Checks for libraries.
ebdf5321 153AC_MSG_NOTICE([CHECKS for libraries])
f6719572 154#
633b4239 155# Define NO_OPENSSL environment variable if you do not have OpenSSL.
ebdf5321 156# Define NEEDS_SSL_WITH_CRYPTO if you need -lcrypto with -lssl (Darwin).
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157AC_CHECK_LIB([crypto], [SHA1_Init],
158[GIT_CONF_APPEND_LINE(NEEDS_SSL_WITH_CRYPTO=)],
3068f6c4 159[AC_CHECK_LIB([ssl], [SHA1_Init],
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160 [GIT_CONF_APPEND_LINE(NEEDS_SSL_WITH_CRYPTO=YesPlease)
161 GIT_CONF_APPEND_LINE(NEEDS_SSL_WITH_CRYPTO=)],
66142aa1 162 [GIT_CONF_APPEND_LINE(NO_OPENSSL=YesPlease)])])
f6719572 163#
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164# Define NO_CURL if you do not have curl installed. git-http-pull and
165# git-http-push are not built, and you cannot use http:// and https://
166# transports.
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167AC_CHECK_LIB([curl], [curl_global_init],
168[GIT_CONF_APPEND_LINE(NO_CURL=)],
66142aa1 169[GIT_CONF_APPEND_LINE(NO_CURL=YesPlease)])
f6719572 170#
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171# Define NO_EXPAT if you do not have expat installed. git-http-push is
172# not built, and you cannot push using http:// and https:// transports.
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173AC_CHECK_LIB([expat], [XML_ParserCreate],
174[GIT_CONF_APPEND_LINE(NO_EXPAT=)],
66142aa1 175[GIT_CONF_APPEND_LINE(NO_EXPAT=YesPlease)])
f6719572 176#
633b4239 177# Define NEEDS_LIBICONV if linking with libc is not enough (Darwin).
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178AC_CHECK_LIB([c], [iconv],
179[GIT_CONF_APPEND_LINE(NEEDS_LIBICONV=)],
f7b5e8d0 180[GIT_CONF_APPEND_LINE(NEEDS_LIBICONV=YesPlease)])
f6719572 181#
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182# Define NEEDS_SOCKET if linking with libc is not enough (SunOS,
183# Patrick Mauritz).
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184AC_CHECK_LIB([c], [socket],
185[GIT_CONF_APPEND_LINE(NEEDS_SOCKET=)],
186[GIT_CONF_APPEND_LINE(NEEDS_SOCKET=YesPlease)])
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187
188
189## Checks for header files.
190
191
192## Checks for typedefs, structures, and compiler characteristics.
eb0f255d 193AC_MSG_NOTICE([CHECKS for typedefs, structures, and compiler characteristics])
f6719572 194#
633b4239 195# Define NO_D_INO_IN_DIRENT if you don't have d_ino in your struct dirent.
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196AC_CHECK_MEMBER(struct dirent.d_ino,
197[GIT_CONF_APPEND_LINE(NO_D_INO_IN_DIRENT=)],
66142aa1 198[GIT_CONF_APPEND_LINE(NO_D_INO_IN_DIRENT=YesPlease)],
eb0f255d 199[#include <dirent.h>])
f6719572 200#
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201# Define NO_D_TYPE_IN_DIRENT if your platform defines DT_UNKNOWN but lacks
202# d_type in struct dirent (latest Cygwin -- will be fixed soonish).
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203AC_CHECK_MEMBER(struct dirent.d_type,
204[GIT_CONF_APPEND_LINE(NO_D_TYPE_IN_DIRENT=)],
66142aa1 205[GIT_CONF_APPEND_LINE(NO_D_TYPE_IN_DIRENT=YesPlease)],
eb0f255d 206[#include <dirent.h>])
f6719572 207#
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208# Define NO_SOCKADDR_STORAGE if your platform does not have struct
209# sockaddr_storage.
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210AC_CHECK_TYPE(struct sockaddr_storage,
211[GIT_CONF_APPEND_LINE(NO_SOCKADDR_STORAGE=)],
66142aa1 212[GIT_CONF_APPEND_LINE(NO_SOCKADDR_STORAGE=YesPlease)],
eb0f255d 213[#include <netinet/in.h>])
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214# Define NO_IPV6 if you lack IPv6 support and getaddrinfo().
215AC_CHECK_TYPE([struct addrinfo],[
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216 AC_CHECK_FUNC([getaddrinfo],
217 [GIT_CONF_APPEND_LINE(NO_IPV6=)],
218 [GIT_CONF_APPEND_LINE(NO_IPV6=YesPlease)])
219],[GIT_CONF_APPEND_LINE(NO_IPV6=YesPlease)],[
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220#include <sys/types.h>
221#include <sys/socket.h>
222#include <netdb.h>
223])
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224#
225# Define NO_C99_FORMAT if your formatted IO functions (printf/scanf et.al.)
226# do not support the 'size specifiers' introduced by C99, namely ll, hh,
227# j, z, t. (representing long long int, char, intmax_t, size_t, ptrdiff_t).
228# some C compilers supported these specifiers prior to C99 as an extension.
465e649d 229AC_CACHE_CHECK(whether formatted IO functions support C99 size specifiers,
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230 ac_cv_c_c99_format,
231[# Actually git uses only %z (%zu) in alloc.c, and %t (%td) in mktag.c
232AC_RUN_IFELSE(
233 [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
234 [[char buf[64];
235 if (sprintf(buf, "%lld%hhd%jd%zd%td", (long long int)1, (char)2, (intmax_t)3, (size_t)4, (ptrdiff_t)5) != 5)
236 exit(1);
237 else if (strcmp(buf, "12345"))
238 exit(2);]])],
239 [ac_cv_c_c99_format=yes],
240 [ac_cv_c_c99_format=no])
241])
242if test $ac_cv_c_c99_format = no; then
243 GIT_CONF_APPEND_LINE(NO_C99_FORMAT=YesPlease)
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244else
245 GIT_CONF_APPEND_LINE(NO_C99_FORMAT=)
656517b9 246fi
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247
248
249## Checks for library functions.
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250## (in default C library and libraries checked by AC_CHECK_LIB)
251AC_MSG_NOTICE([CHECKS for library functions])
f6719572 252#
633b4239 253# Define NO_STRCASESTR if you don't have strcasestr.
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254AC_CHECK_FUNC(strcasestr,
255[GIT_CONF_APPEND_LINE(NO_STRCASESTR=)],
66142aa1 256[GIT_CONF_APPEND_LINE(NO_STRCASESTR=YesPlease)])
f6719572 257#
633b4239 258# Define NO_STRLCPY if you don't have strlcpy.
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259AC_CHECK_FUNC(strlcpy,
260[GIT_CONF_APPEND_LINE(NO_STRLCPY=)],
66142aa1 261[GIT_CONF_APPEND_LINE(NO_STRLCPY=YesPlease)])
f6719572 262#
633b4239 263# Define NO_SETENV if you don't have setenv in the C library.
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264AC_CHECK_FUNC(setenv,
265[GIT_CONF_APPEND_LINE(NO_SETENV=)],
66142aa1 266[GIT_CONF_APPEND_LINE(NO_SETENV=YesPlease)])
f6719572 267#
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268# Define NO_MMAP if you want to avoid mmap.
269#
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270# Define NO_ICONV if your libc does not properly support iconv.
271
272
273## Other checks.
274# Define USE_PIC if you need the main git objects to be built with -fPIC
275# in order to build and link perl/Git.so. x86-64 seems to need this.
276#
277# Define NO_SYMLINK_HEAD if you never want .git/HEAD to be a symbolic link.
278# Enable it on Windows. By default, symrefs are still used.
279#
280# Define WITH_OWN_SUBPROCESS_PY if you want to use with python 2.3.
281#
282# Define NO_ACCURATE_DIFF if your diff program at least sometimes misses
283# a missing newline at the end of the file.
284
285
633b4239 286## Output files
d3a6db98 287AC_CONFIG_FILES(["${config_file}":"${config_in}":"${config_append}"])
55667714 288AC_OUTPUT
d3a6db98 289
f6719572 290
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291## Cleanup
292rm -f "${config_append}"