1# Process this file with autoconf to produce a configure script.
2#
3# Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
4# 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
5# This file is part of GNU Make.
6#
7# GNU Make is free software; you can redistribute it and/or modify it under the
8# terms of the GNU General Public License as published by the Free Software
9# Foundation; either version 2, or (at your option) any later version.
10#
11# GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
12# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
13# A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
14#
15# You should have received a copy of the GNU General Public License along with
16# GNU Make; see the file COPYING.  If not, write to the Free Software
17# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18
19AC_INIT([GNU make],[3.81],[bug-make@gnu.org])
20
21AC_PREREQ(2.59)
22AC_REVISION([[$Id: configure.in,v 1.142 2006/04/01 06:36:40 psmith Exp $]])
23
24# Autoconf setup
25AC_CONFIG_AUX_DIR(config)
26AC_CONFIG_SRCDIR(vpath.c)
27AC_CONFIG_HEADERS(config.h)
28
29# Automake setup
30AM_INIT_AUTOMAKE([1.9])
31
32# Checks for programs.
33AC_PROG_CC
34AC_PROG_INSTALL
35AC_PROG_RANLIB
36AC_PROG_CPP
37AC_CHECK_PROG(AR, ar, ar, ar)
38# Perl is needed for the test suite (only)
39AC_CHECK_PROG(PERL, perl, perl, perl)
40
41# Specialized system macros
42AC_CANONICAL_HOST
43AC_AIX
44AC_ISC_POSIX
45AC_MINIX
46
47# Needed for ansi2knr
48AM_C_PROTOTYPES
49
50# Enable gettext, in "external" mode.
51
52AM_GNU_GETTEXT_VERSION(0.14.1)
53AM_GNU_GETTEXT([external])
54
55# This test must come as early as possible after the compiler configuration
56# tests, because the choice of the file model can (in principle) affect
57# whether functions and headers are available, whether they work, etc.
58AC_SYS_LARGEFILE
59
60# Checks for libraries.
61AC_SEARCH_LIBS(getpwnam, [sun])
62
63# Checks for header files.
64AC_HEADER_STDC
65AC_HEADER_DIRENT
66AC_HEADER_STAT
67AC_HEADER_TIME
68AC_CHECK_HEADERS(stdlib.h locale.h unistd.h limits.h fcntl.h string.h \
69		 memory.h sys/param.h sys/resource.h sys/time.h sys/timeb.h)
70
71# Set a flag if we have an ANSI C compiler
72if test "$ac_cv_prog_cc_stdc" != no; then
73  AC_DEFINE(HAVE_ANSI_COMPILER, 1,
74	      [Define if your compiler conforms to the ANSI C standard.])
75fi
76
77
78# Determine what kind of variadic function calls we support
79AC_CHECK_HEADERS(stdarg.h varargs.h, break)
80
81AM_PROG_CC_C_O
82AC_C_CONST
83AC_TYPE_SIGNAL
84AC_TYPE_UID_T
85AC_TYPE_PID_T
86
87# Find some definition for uintmax_t
88
89AC_CHECK_TYPE(uintmax_t,,[
90  uintmax_t="unsigned long"
91  AC_CHECK_TYPE(unsigned long long,[uintmax_t="unsigned long long"])
92  AC_DEFINE_UNQUOTED(uintmax_t,$uintmax_t,
93    [Define uintmax_t if not defined in <stdint.h> or <inttypes.h>.])])
94
95# Find out whether our struct stat returns nanosecond resolution timestamps.
96
97AC_STRUCT_ST_MTIM_NSEC
98AC_MSG_CHECKING([whether to use high resolution file timestamps])
99AC_CACHE_VAL(make_cv_file_timestamp_hi_res, [
100  make_cv_file_timestamp_hi_res=no
101  if test "$ac_cv_struct_st_mtim_nsec" != no; then
102    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
103#	if HAVE_INTTYPES_H
104#	 include <inttypes.h>
105#	endif]],
106	              [[char a[0x7fffffff < (uintmax_t)-1 >> 30 ? 1 : -1];]])],
107      [make_cv_file_timestamp_hi_res=yes],
108      [])
109  fi])
110AC_MSG_RESULT($make_cv_file_timestamp_hi_res)
111if test "$make_cv_file_timestamp_hi_res" = yes; then
112  val=1
113else
114  val=0
115fi
116AC_DEFINE_UNQUOTED(FILE_TIMESTAMP_HI_RES, $val,
117		   [Use high resolution file timestamps if nonzero.])
118
119if test "$make_cv_file_timestamp_hi_res" = yes; then
120  # Solaris 2.5.1 needs -lposix4 to get the clock_gettime function.
121  # Solaris 7 prefers the library name -lrt to the obsolescent name -lposix4.
122  AC_SEARCH_LIBS(clock_gettime, [rt posix4])
123  if test "$ac_cv_search_clock_gettime" != no; then
124    AC_DEFINE(HAVE_CLOCK_GETTIME, 1,
125	      [Define if you have the clock_gettime function.])
126  fi
127fi
128
129# Check for DOS-style pathnames.
130pds_AC_DOS_PATHS
131
132# See if we have a standard version of gettimeofday().  Since actual
133# implementations can differ, just make sure we have the most common
134# one.
135AC_CACHE_CHECK([for standard gettimeofday], ac_cv_func_gettimeofday,
136  [ac_cv_func_gettimeofday=no
137   AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <sys/time.h>
138                  int main ()
139	          {
140		    struct timeval t; t.tv_sec = -1; t.tv_usec = -1;
141		    exit (gettimeofday (&t, 0) != 0
142		          || t.tv_sec < 0 || t.tv_usec < 0);
143	          }]])],
144		  [ac_cv_func_gettimeofday=yes],
145		  [ac_cv_func_gettimeofday=no],
146		  [ac_cv_func_gettimeofday="no (cross-compiling)"])])
147if test "$ac_cv_func_gettimeofday" = yes; then
148  AC_DEFINE(HAVE_GETTIMEOFDAY, 1,
149	    [Define if you have a standard gettimeofday function])
150fi
151
152AC_CHECK_FUNCS(	memcpy memmove strchr strdup mkstemp mktemp fdopen \
153	        bsd_signal dup2 getcwd realpath sigsetmask sigaction \
154                getgroups seteuid setegid setlinebuf setreuid setregid \
155                getrlimit setrlimit setvbuf pipe strerror strsignal \
156		lstat readlink atexit)
157
158AC_FUNC_SETVBUF_REVERSED
159
160# strcoll() is used by the GNU glob library
161AC_FUNC_STRCOLL
162
163AC_FUNC_ALLOCA
164AC_FUNC_FORK([])
165AC_FUNC_VPRINTF
166AC_FUNC_CLOSEDIR_VOID
167
168AC_FUNC_GETLOADAVG
169
170# AC_FUNC_GETLOADAVG is documented to set the NLIST_STRUCT value, but it
171# doesn't.  So, we will.
172
173if test "$ac_cv_header_nlist_h" = yes; then
174  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <nlist.h>]],
175	[[struct nlist nl;
176          nl.n_name = "string";
177          return 0;]])],
178	[make_cv_nlist_struct=yes],
179	[make_cv_nlist_struct=no])
180  if test "$make_cv_nlist_struct" = yes; then
181    AC_DEFINE(NLIST_STRUCT, 1,
182       [Define if struct nlist.n_name is a pointer rather than an array.])
183  fi
184fi
185
186AC_CHECK_DECLS([sys_siglist, _sys_siglist, __sys_siglist], , ,
187  [AC_INCLUDES_DEFAULT
188#include <signal.h>
189/* NetBSD declares sys_siglist in unistd.h.  */
190#if HAVE_UNISTD_H
191# include <unistd.h>
192#endif
193])
194
195
196# Check out the wait reality.
197AC_CHECK_HEADERS(sys/wait.h)
198AC_CHECK_FUNCS(waitpid wait3)
199AC_MSG_CHECKING(for union wait)
200AC_CACHE_VAL(make_cv_union_wait, [dnl
201    AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
202#include <sys/wait.h>]],
203     [[union wait status; int pid; pid = wait (&status);
204#ifdef WEXITSTATUS
205/* Some POSIXoid systems have both the new-style macros and the old
206   union wait type, and they do not work together.  If union wait
207   conflicts with WEXITSTATUS et al, we don't want to use it at all.  */
208        if (WEXITSTATUS (status) != 0) pid = -1;
209#ifdef WTERMSIG
210        /* If we have WEXITSTATUS and WTERMSIG, just use them on ints.  */
211        -- blow chunks here --
212#endif
213#endif
214#ifdef HAVE_WAITPID
215        /* Make sure union wait works with waitpid.  */
216        pid = waitpid (-1, &status, 0);
217#endif
218      ]])],
219    [make_cv_union_wait=yes],
220    [make_cv_union_wait=no])])
221if test "$make_cv_union_wait" = yes; then
222  AC_DEFINE(HAVE_UNION_WAIT, 1,
223            [Define this if you have the \`union wait' type in <sys/wait.h>.])
224fi
225AC_MSG_RESULT($make_cv_union_wait)
226
227
228# If we're building on Windows/DOS/OS/2, add some support for DOS drive specs.
229if test "$PATH_SEPARATOR" = ';'; then
230  AC_DEFINE(HAVE_DOS_PATHS, 1,
231            [Define this if your system requires backslashes or drive specs in pathnames.])
232fi
233
234
235# See if the user wants to use pmake's "customs" distributed build capability
236
237AC_SUBST(REMOTE) REMOTE=stub
238use_customs=false
239AC_ARG_WITH(customs,
240  AC_HELP_STRING([--with-customs=DIR],
241		 [enable remote jobs via Customs--see README.customs]),
242  [case $withval in
243    n|no) : ;;
244    *) make_cppflags="$CPPFLAGS"
245       case $withval in
246	 y|ye|yes) : ;;
247	 *) CPPFLAGS="$CPPFLAGS -I$with_customs/include/customs"
248	    make_ldflags="$LDFLAGS -L$with_customs/lib" ;;
249       esac
250       CF_NETLIBS
251       AC_CHECK_HEADER(customs.h,
252		       [use_customs=true
253		         REMOTE=cstms
254			 LIBS="$LIBS -lcustoms" LDFLAGS="$make_ldflags"],
255		       [with_customs=no
256			 CPPFLAGS="$make_cppflags" make_badcust=yes])
257       ;;
258  esac])
259# Tell automake about this, so it can include the right .c files.
260AM_CONDITIONAL(USE_CUSTOMS, test "$use_customs" = true)
261
262# See if the user asked to handle case insensitive file systems.
263
264AH_TEMPLATE(HAVE_CASE_INSENSITIVE_FS, [Use case insensitive file names])
265AC_ARG_ENABLE(case-insensitive-file-system,
266  AC_HELP_STRING([--enable-case-insensitive-file-system],
267		 [enable case insensitive file system support]),
268  case_insensitive_fs="yes" AC_DEFINE(HAVE_CASE_INSENSITIVE_FS),
269  case_insensitive_fs="no")
270
271# See if we can handle the job server feature, and if the user wants it.
272
273AC_ARG_ENABLE(job-server,
274  AC_HELP_STRING([--disable-job-server],
275                 [disallow recursive make communication during -jN]),
276  [make_cv_job_server="$enableval" user_job_server="$enableval"],
277  [make_cv_job_server="yes"])
278
279has_wait_nohang=yes
280case "$ac_cv_func_waitpid/$ac_cv_func_wait3" in
281  no/no) has_wait_nohang=no ;;
282esac
283
284AC_CACHE_CHECK(for SA_RESTART, make_cv_sa_restart, [
285  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <signal.h>]],
286      [[return SA_RESTART;]])],
287    [make_cv_sa_restart=yes],
288    [make_cv_sa_restart=no])])
289
290if test "$make_cv_sa_restart" != no; then
291  AC_DEFINE(HAVE_SA_RESTART, 1,
292     [Define if <signal.h> defines the SA_RESTART constant.])
293fi
294
295# enable make_cv_sa_restart for OS/2 so that the jobserver will be enabled,
296# but do it after HAVE_SA_RESTART has been defined.
297case "$host_os" in
298  os2*) make_cv_sa_restart=yes ;;
299esac
300
301case "$ac_cv_func_pipe/$ac_cv_func_sigaction/$make_cv_sa_restart/$has_wait_nohang/$make_cv_job_server" in
302  yes/yes/yes/yes/yes)
303    AC_DEFINE(MAKE_JOBSERVER, 1,
304              [Define this to enable job server support in GNU make.]);;
305esac
306
307# if we have both lstat() and readlink() then we can support symlink
308# timechecks.
309case "$ac_cv_func_lstat/$ac_cv_func_readlink" in
310  yes/yes)
311    AC_DEFINE(MAKE_SYMLINKS, 1,
312              [Define this to enable symbolic link timestamp checking.]);;
313esac
314
315# Find the SCCS commands, so we can include them in our default rules.
316
317AC_CACHE_CHECK(for location of SCCS get command, make_cv_path_sccs_get, [
318if test -f /usr/sccs/get; then
319  make_cv_path_sccs_get=/usr/sccs/get
320else
321  make_cv_path_sccs_get=get
322fi])
323AC_DEFINE_UNQUOTED(SCCS_GET, ["$make_cv_path_sccs_get"],
324	           [Define to the name of the SCCS 'get' command.])
325
326ac_clean_files="$ac_clean_files s.conftest conftoast" # Remove these later.
327if ( /usr/sccs/admin -n s.conftest || admin -n s.conftest ) >/dev/null 2>&1 &&
328   test -f s.conftest; then
329  # We successfully created an SCCS file.
330  AC_CACHE_CHECK(if SCCS get command understands -G, make_cv_sys_get_minus_G, [
331    if $make_cv_path_sccs_get -Gconftoast s.conftest >/dev/null 2>&1 &&
332       test -f conftoast; then
333       make_cv_sys_get_minus_G=yes
334    else
335       make_cv_sys_get_minus_G=no
336    fi])
337  case "$make_cv_sys_get_minus_G" in
338    yes) AC_DEFINE(SCCS_GET_MINUS_G, 1,
339           [Define this if the SCCS 'get' command understands the '-G<file>' option.]);;
340  esac
341fi
342rm -f s.conftest conftoast
343
344# Check the system to see if it provides GNU glob.  If not, use our
345# local version.
346
347AC_MSG_CHECKING(if system libc has GNU glob)
348AC_CACHE_VAL(make_cv_sys_gnu_glob, [
349 AC_EGREP_CPP(gnu glob,[
350#include <features.h>
351#include <glob.h>
352#include <fnmatch.h>
353
354#define GLOB_INTERFACE_VERSION 1
355#if !defined _LIBC && defined __GNU_LIBRARY__ && __GNU_LIBRARY__ > 1
356# include <gnu-versions.h>
357# if _GNU_GLOB_INTERFACE_VERSION == GLOB_INTERFACE_VERSION
358   gnu glob
359# endif
360#endif
361 ], [AC_MSG_RESULT(yes)
362make_cv_sys_gnu_glob=yes], [AC_MSG_RESULT([no; using local copy])
363AC_SUBST(GLOBINC) GLOBINC='-I$(srcdir)/glob'
364AC_SUBST(GLOBLIB) GLOBLIB=glob/libglob.a
365make_cv_sys_gnu_glob=no])])
366# Tell automake about this, so it can build the right .c files.
367AM_CONDITIONAL(USE_LOCAL_GLOB, test "$make_cv_sys_gnu_glob" = no)
368
369# Let the makefile know what our build host is
370
371AC_DEFINE_UNQUOTED(MAKE_HOST,"$host",[Build host information.])
372MAKE_HOST="$host"
373AC_SUBST(MAKE_HOST)
374
375w32_target_env=no
376AM_CONDITIONAL([WINDOWSENV], false)
377
378case "$host" in
379  *-*-mingw32)
380    AM_CONDITIONAL(WINDOWSENV, true)
381    w32_target_env=yes
382    AC_DEFINE([WINDOWS32], [1], [Use platform specific coding])
383    AC_DEFINE([HAVE_DOS_PATHS], [1], [Use platform specific coding])
384    ;;
385esac
386
387# Include the Maintainer's Makefile section, if it's here.
388
389MAINT_MAKEFILE=/dev/null
390if test -r "$srcdir/maintMakefile"; then
391  MAINT_MAKEFILE="$srcdir/maintMakefile"
392fi
393AC_SUBST_FILE(MAINT_MAKEFILE)
394
395# Allow building with dmalloc
396AM_WITH_DMALLOC
397
398# Forcibly disable SET_MAKE.  If it's set it breaks things like the test
399# scripts, etc.
400SET_MAKE=
401
402# Sanity check and inform the user of what we found
403
404case "$make_badcust" in
405  yes) echo
406       echo "WARNING: --with-customs specified but no customs.h could be found;"
407       echo "         disabling Customs support."
408       echo ;;
409esac
410
411case "$with_customs" in
412  ""|n|no|y|ye|yes) ;;
413  *) if test -f "$with_customs/lib/libcustoms.a"; then
414       :
415     else
416       echo
417       echo "WARNING: '$with_customs/lib' does not appear to contain the"
418       echo "         Customs library.  You must build and install Customs"
419       echo "         before compiling GNU make."
420       echo
421     fi ;;
422esac
423
424case "$has_wait_nohang" in
425  no) echo
426      echo "WARNING: Your system has neither waitpid() nor wait3()."
427      echo "         Without one of these, signal handling is unreliable."
428      echo "         You should be aware that running GNU make with -j"
429      echo "         could result in erratic behavior."
430      echo ;;
431esac
432
433case "$make_cv_job_server/$user_job_server" in
434  no/yes) echo
435	  echo "WARNING: Make job server requires a POSIX-ish system that"
436	  echo "         supports the pipe(), sigaction(), and either"
437          echo "         waitpid() or wait3() functions.  Your system doesn't"
438	  echo "         appear to provide one or more of those."
439	  echo "         Disabling job server support."
440          echo ;;
441esac
442
443
444# Specify what files are to be created.
445AC_CONFIG_FILES(Makefile glob/Makefile po/Makefile.in config/Makefile doc/Makefile w32/Makefile)
446
447# OK, do it!
448
449AC_OUTPUT
450
451# We only generate the build.sh if we have a build.sh.in; we won't have
452# one before we've created a distribution.
453if test -f "$srcdir/build.sh.in"; then
454  ./config.status --file build.sh
455  chmod +x build.sh
456fi
457
458dnl Local Variables:
459dnl comment-start: "dnl "
460dnl comment-end: ""
461dnl comment-start-skip: "\\bdnl\\b\\s *"
462dnl compile-command: "make configure config.h.in"
463dnl End:
464