1 # Process this file with autoconf to produce a configure script.
3 # Copyright (C) 1993-2016 Free Software Foundation, Inc.
4 # This file is part of GNU Make.
6 # GNU Make is free software; you can redistribute it and/or modify it under
7 # the terms of the GNU General Public License as published by the Free Software
8 # Foundation; either version 3 of the License, or (at your option) any later
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
13 # FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
16 # You should have received a copy of the GNU General Public License along with
17 # this program. If not, see <http://www.gnu.org/licenses/>.
19 AC_INIT([GNU make],[4.2],[bug-make@gnu.org])
24 AC_CONFIG_AUX_DIR([config])
25 AC_CONFIG_SRCDIR([vpath.c])
26 AC_CONFIG_HEADERS([config.h])
29 # We have to enable "foreign" because ChangeLog is auto-generated
30 # We cannot enable -Werror because gettext 0.18.1 has invalid content
31 # When we update gettext to 0.18.3 or better we can add it again.
32 AM_INIT_AUTOMAKE([1.15 foreign -Werror -Wall])
34 # Checks for programs.
35 AC_USE_SYSTEM_EXTENSIONS
40 AC_CHECK_PROG([AR], [ar], [ar], [ar])
41 # Perl is needed for the test suite (only)
42 AC_CHECK_PROG([PERL], [perl], [perl], [perl])
44 # Needed for w32/Makefile.am
47 # Specialized system macros
53 # Enable gettext, in "external" mode.
54 AM_GNU_GETTEXT_VERSION([0.19.4])
55 AM_GNU_GETTEXT([external])
57 # This test must come as early as possible after the compiler configuration
58 # tests, because the choice of the file model can (in principle) affect
59 # whether functions and headers are available, whether they work, etc.
62 # Checks for libraries.
63 AC_SEARCH_LIBS([getpwnam], [sun])
65 # Checks for header files.
70 AC_CHECK_HEADERS([stdlib.h locale.h unistd.h limits.h fcntl.h string.h \
71 memory.h sys/param.h sys/resource.h sys/time.h sys/timeb.h \
84 # Find out whether our struct stat returns nanosecond resolution timestamps.
86 AC_STRUCT_ST_MTIM_NSEC
87 AC_CACHE_CHECK([whether to use high resolution file timestamps],
88 [make_cv_file_timestamp_hi_res],
89 [ make_cv_file_timestamp_hi_res=no
90 AS_IF([test "$ac_cv_struct_st_mtim_nsec" != no],
91 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
93 # include <inttypes.h>
95 [[char a[0x7fffffff < (uintmax_t)-1 >> 30 ? 1 : -1];]])],
96 [make_cv_file_timestamp_hi_res=yes])
98 AS_IF([test "$make_cv_file_timestamp_hi_res" = yes], [val=1], [val=0])
99 AC_DEFINE_UNQUOTED([FILE_TIMESTAMP_HI_RES], [$val],
100 [Use high resolution file timestamps if nonzero.])
102 AS_IF([test "$make_cv_file_timestamp_hi_res" = yes],
103 [ # Solaris 2.5.1 needs -lposix4 to get the clock_gettime function.
104 # Solaris 7 prefers the library name -lrt to the obsolescent name -lposix4.
105 AC_SEARCH_LIBS([clock_gettime], [rt posix4])
106 AS_IF([test "$ac_cv_search_clock_gettime" != no],
107 [ AC_DEFINE([HAVE_CLOCK_GETTIME], [1],
108 [Define to 1 if you have the clock_gettime function.])
112 # Check for DOS-style pathnames.
115 # See if we have a standard version of gettimeofday(). Since actual
116 # implementations can differ, just make sure we have the most common
118 AC_CACHE_CHECK([for standard gettimeofday], [ac_cv_func_gettimeofday],
119 [ac_cv_func_gettimeofday=no
120 AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <sys/time.h>
123 struct timeval t; t.tv_sec = -1; t.tv_usec = -1;
124 exit (gettimeofday (&t, 0) != 0
125 || t.tv_sec < 0 || t.tv_usec < 0);
127 [ac_cv_func_gettimeofday=yes],
128 [ac_cv_func_gettimeofday=no],
129 [ac_cv_func_gettimeofday="no (cross-compiling)"])])
130 AS_IF([test "$ac_cv_func_gettimeofday" = yes],
131 [ AC_DEFINE([HAVE_GETTIMEOFDAY], [1],
132 [Define to 1 if you have a standard gettimeofday function])
135 AC_CHECK_FUNCS([strdup strndup mkstemp mktemp fdopen fileno \
136 dup dup2 getcwd realpath sigsetmask sigaction \
137 getgroups seteuid setegid setlinebuf setreuid setregid \
138 getrlimit setrlimit setvbuf pipe strerror strsignal \
139 lstat readlink atexit isatty ttyname pselect])
141 # We need to check declarations, not just existence, because on Tru64 this
142 # function is not declared without special flags, which themselves cause
143 # other problems. We'll just use our own.
144 AC_CHECK_DECLS([bsd_signal], [], [], [[#define _GNU_SOURCE 1
145 #include <signal.h>]])
149 AC_FUNC_SETVBUF_REVERSED
151 # Rumor has it that strcasecmp lives in -lresolv on some odd systems.
152 # It doesn't hurt much to use our own if we can't find it so I don't
153 # make the effort here.
154 AC_CHECK_FUNCS([strcasecmp strncasecmp strcmpi strncmpi stricmp strnicmp])
156 # strcoll() is used by the GNU glob library
160 AC_FUNC_CLOSEDIR_VOID
162 # See if the user wants to add (or not) GNU Guile support
164 AC_ARG_WITH([guile], [AS_HELP_STRING([--with-guile],
165 [Support GNU Guile for embedded scripting])])
167 # For some strange reason, at least on Ubuntu, each version of Guile
168 # comes with it's own PC file so we have to specify them as individual
170 AS_IF([test "x$with_guile" != xno],
171 [ PKG_CHECK_MODULES([GUILE], [guile-2.0], [have_guile=yes],
172 [PKG_CHECK_MODULES([GUILE], [guile-1.8], [have_guile=yes],
176 AS_IF([test "$have_guile" = yes],
177 [AC_DEFINE([HAVE_GUILE], [1], [Embed GNU Guile support])])
179 AM_CONDITIONAL([HAVE_GUILE], [test "$have_guile" = yes])
183 # AC_FUNC_GETLOADAVG is documented to set the NLIST_STRUCT value, but it
184 # doesn't. So, we will.
186 AS_IF([test "$ac_cv_header_nlist_h" = yes],
187 [ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <nlist.h>]],
189 nl.n_name = "string";
191 [make_cv_nlist_struct=yes],
192 [make_cv_nlist_struct=no])
193 AS_IF([test "$make_cv_nlist_struct" = yes],
194 [ AC_DEFINE([NLIST_STRUCT], [1],
195 [Define to 1 if struct nlist.n_name is a pointer rather than an array.])
199 AC_CHECK_DECLS([sys_siglist, _sys_siglist, __sys_siglist], , ,
202 /* NetBSD declares sys_siglist in unistd.h. */
209 # Check out the wait reality.
210 AC_CHECK_HEADERS([sys/wait.h],[],[],[[#include <sys/types.h>]])
211 AC_CHECK_FUNCS([waitpid wait3])
212 AC_CACHE_CHECK([for union wait], [make_cv_union_wait],
213 [ AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
214 #include <sys/wait.h>]],
215 [[union wait status; int pid; pid = wait (&status);
217 /* Some POSIXoid systems have both the new-style macros and the old
218 union wait type, and they do not work together. If union wait
219 conflicts with WEXITSTATUS et al, we don't want to use it at all. */
220 if (WEXITSTATUS (status) != 0) pid = -1;
222 /* If we have WEXITSTATUS and WTERMSIG, just use them on ints. */
223 -- blow chunks here --
227 /* Make sure union wait works with waitpid. */
228 pid = waitpid (-1, &status, 0);
231 [make_cv_union_wait=yes],
232 [make_cv_union_wait=no])
234 AS_IF([test "$make_cv_union_wait" = yes],
235 [ AC_DEFINE([HAVE_UNION_WAIT], [1],
236 [Define to 1 if you have the 'union wait' type in <sys/wait.h>.])
240 # If we're building on Windows/DOS/OS/2, add some support for DOS drive specs.
241 AS_IF([test "$PATH_SEPARATOR" = ';'],
242 [ AC_DEFINE([HAVE_DOS_PATHS], [1],
243 [Define to 1 if your system requires backslashes or drive specs in pathnames.])
246 # See if the user wants to use pmake's "customs" distributed build capability
247 AC_SUBST([REMOTE]) REMOTE=stub
249 AC_ARG_WITH([customs],
250 [AC_HELP_STRING([--with-customs=DIR],
251 [enable remote jobs via Customs--see README.customs])],
252 [ AS_CASE([$withval], [n|no], [:],
253 [make_cppflags="$CPPFLAGS"
256 [CPPFLAGS="$CPPFLAGS -I$with_customs/include/customs"
257 make_ldflags="$LDFLAGS -L$with_customs/lib"])
259 AC_CHECK_HEADER([customs.h],
262 LIBS="$LIBS -lcustoms" LDFLAGS="$make_ldflags"],
264 CPPFLAGS="$make_cppflags" make_badcust=yes])
268 # Tell automake about this, so it can include the right .c files.
269 AM_CONDITIONAL([USE_CUSTOMS], [test "$use_customs" = true])
271 # See if the user asked to handle case insensitive file systems.
272 AH_TEMPLATE([HAVE_CASE_INSENSITIVE_FS], [Use case insensitive file names])
273 AC_ARG_ENABLE([case-insensitive-file-system],
274 AC_HELP_STRING([--enable-case-insensitive-file-system],
275 [assume file systems are case insensitive]),
276 [AS_IF([test "$enableval" = yes], [AC_DEFINE([HAVE_CASE_INSENSITIVE_FS])])])
278 # See if we can handle the job server feature, and if the user wants it.
279 AC_ARG_ENABLE([job-server],
280 AC_HELP_STRING([--disable-job-server],
281 [disallow recursive make communication during -jN]),
282 [make_cv_job_server="$enableval" user_job_server="$enableval"],
283 [make_cv_job_server="yes"])
285 AS_IF([test "$ac_cv_func_waitpid" = no && test "$ac_cv_func_wait3" = no],
286 [has_wait_nohang=no],
287 [has_wait_nohang=yes])
289 AC_CACHE_CHECK([for SA_RESTART], [make_cv_sa_restart], [
290 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <signal.h>]],
291 [[return SA_RESTART;]])],
292 [make_cv_sa_restart=yes],
293 [make_cv_sa_restart=no])])
295 AS_IF([test "$make_cv_sa_restart" != no],
296 [ AC_DEFINE([HAVE_SA_RESTART], [1],
297 [Define to 1 if <signal.h> defines the SA_RESTART constant.])
300 # Only allow jobserver on systems that support it
301 AS_CASE([/$ac_cv_func_pipe/$ac_cv_func_sigaction/$make_cv_sa_restart/$has_wait_nohang/],
302 [*/no/*], [make_cv_job_server=no])
304 # Also supported on OS2 and MinGW
305 AS_CASE([$host_os], [os2*|mingw*], [make_cv_job_server=yes])
307 # If we support it and the user didn't disable it, build with jobserver
308 AS_CASE([/$make_cv_job_server/$user_job_server/],
309 [*/no/*], [: no jobserver],
310 [AC_DEFINE(MAKE_JOBSERVER, 1,
311 [Define to 1 to enable job server support in GNU make.])
314 # If dl*() functions are supported we can enable the load operation
315 AC_CHECK_DECLS([dlopen, dlsym, dlerror], [], [],
316 [[#include <dlfcn.h>]])
318 AC_ARG_ENABLE([load],
319 AC_HELP_STRING([--disable-load],
320 [disable support for the 'load' operation]),
321 [make_cv_load="$enableval" user_load="$enableval"],
322 [make_cv_load="yes"])
324 AS_CASE([/$ac_cv_have_decl_dlopen/$ac_cv_have_decl_dlsym/$ac_cv_have_decl_dlerror/],
325 [*/no/*], [make_cv_load=no])
328 AS_IF([test "$make_cv_load" = yes], [
329 AC_SEARCH_LIBS([dlopen], [dl], [], [make_cv_load=])
332 AS_CASE([/$make_cv_load/$user_load/],
333 [*/no/*], [make_cv_load=no],
334 [AC_DEFINE(MAKE_LOAD, 1,
335 [Define to 1 to enable 'load' support in GNU make.])
338 # If we want load support, we might need to link with export-dynamic.
339 # See if we can figure it out. Unfortunately this is very difficult.
340 # For example passing -rdynamic to the SunPRO linker gives a warning
341 # but succeeds and creates a shared object, not an executable!
342 AS_IF([test "$make_cv_load" = yes], [
343 AC_MSG_CHECKING([If the linker accepts -Wl,--export-dynamic])
344 old_LDFLAGS="$LDFLAGS"
345 LDFLAGS="$LDFLAGS -Wl,--export-dynamic"
346 AC_LINK_IFELSE([AC_LANG_SOURCE([int main(){}])],
347 [AC_MSG_RESULT([yes])
348 AC_SUBST([AM_LDFLAGS], [-Wl,--export-dynamic])],
350 AC_MSG_CHECKING([If the linker accepts -rdynamic])
351 LDFLAGS="$old_LDFLAGS -rdynamic"
352 AC_LINK_IFELSE([AC_LANG_SOURCE([int main(){}])],
353 [AC_MSG_RESULT([yes])
354 AC_SUBST([AM_LDFLAGS], [-rdynamic])],
355 [AC_MSG_RESULT([no])])
357 LDFLAGS="$old_LDFLAGS"
360 # if we have both lstat() and readlink() then we can support symlink
362 AS_IF([test "$ac_cv_func_lstat" = yes && test "$ac_cv_func_readlink" = yes],
363 [ AC_DEFINE([MAKE_SYMLINKS], [1],
364 [Define to 1 to enable symbolic link timestamp checking.])
367 # Find the SCCS commands, so we can include them in our default rules.
369 AC_CACHE_CHECK([for location of SCCS get command], [make_cv_path_sccs_get], [
370 AS_IF([test -f /usr/sccs/get],
371 [make_cv_path_sccs_get=/usr/sccs/get],
372 [make_cv_path_sccs_get=get])
374 AC_DEFINE_UNQUOTED([SCCS_GET], ["$make_cv_path_sccs_get"],
375 [Define to the name of the SCCS 'get' command.])
377 ac_clean_files="$ac_clean_files s.conftest conftoast" # Remove these later.
378 AS_IF([(/usr/sccs/admin -n s.conftest || admin -n s.conftest) >/dev/null 2>&1 &&
380 [ # We successfully created an SCCS file.
381 AC_CACHE_CHECK([if SCCS get command understands -G], [make_cv_sys_get_minus_G],
382 [AS_IF([$make_cv_path_sccs_get -Gconftoast s.conftest >/dev/null 2>&1 &&
384 [make_cv_sys_get_minus_G=yes],
385 [make_cv_sys_get_minus_G=no])
387 AS_IF([test "$make_cv_sys_get_minus_G" = yes],
388 [AC_DEFINE([SCCS_GET_MINUS_G], [1],
389 [Define to 1 if the SCCS 'get' command understands the '-G<file>' option.])
392 rm -f s.conftest conftoast
394 # Check the system to see if it provides GNU glob. If not, use our
396 AC_CACHE_CHECK([if system libc has GNU glob], [make_cv_sys_gnu_glob],
397 [ AC_EGREP_CPP([gnu glob],[
398 #include <features.h>
402 #define GLOB_INTERFACE_VERSION 1
403 #if !defined _LIBC && defined __GNU_LIBRARY__ && __GNU_LIBRARY__ > 1
404 # include <gnu-versions.h>
405 # if _GNU_GLOB_INTERFACE_VERSION == GLOB_INTERFACE_VERSION
409 [make_cv_sys_gnu_glob=yes],
410 [make_cv_sys_gnu_glob=no])])
411 AS_IF([test "$make_cv_sys_gnu_glob" = no],
412 [ GLOBINC='-I$(srcdir)/glob'
413 GLOBLIB=glob/libglob.a
418 # Tell automake about this, so it can build the right .c files.
419 AM_CONDITIONAL([USE_LOCAL_GLOB], [test "$make_cv_sys_gnu_glob" = no])
421 # Let the makefile know what our build host is
423 AC_DEFINE_UNQUOTED([MAKE_HOST],["$host"],[Build host information.])
425 AC_SUBST([MAKE_HOST])
428 AM_CONDITIONAL([WINDOWSENV], [false])
432 [AM_CONDITIONAL([WINDOWSENV], [true])
434 AC_DEFINE([WINDOWS32], [1], [Use platform specific coding])
435 AC_DEFINE([HAVE_DOS_PATHS], [1], [Use platform specific coding])
438 AC_DEFINE_UNQUOTED([PATH_SEPARATOR_CHAR],['$PATH_SEPARATOR'],
439 [Define to the character that separates directories in PATH.])
441 # Include the Maintainer's Makefile section, if it's here.
443 MAINT_MAKEFILE=/dev/null
444 AS_IF([test -r "$srcdir/maintMakefile"],
445 [ MAINT_MAKEFILE="$srcdir/maintMakefile"
447 AC_SUBST_FILE([MAINT_MAKEFILE])
449 # Allow building with dmalloc
452 # Forcibly disable SET_MAKE. If it's set it breaks things like the test
456 # Sanity check and inform the user of what we found
458 AS_IF([test "x$make_badcust" = xyes], [
460 echo "WARNING: --with-customs specified but no customs.h could be found;"
461 echo " disabling Customs support."
465 AS_CASE([$with_customs],
466 [""|n|no|y|ye|yes], [:],
467 [AS_IF([test -f "$with_customs/lib/libcustoms.a"], [:],
469 echo "WARNING: '$with_customs/lib' does not appear to contain the"
470 echo " Customs library. You must build and install Customs"
471 echo " before compiling GNU make."
475 AS_IF([test "x$has_wait_nohang" = xno],
477 echo "WARNING: Your system has neither waitpid() nor wait3()."
478 echo " Without one of these, signal handling is unreliable."
479 echo " You should be aware that running GNU make with -j"
480 echo " could result in erratic behavior."
484 AS_IF([test "x$make_cv_job_server" = xno && test "x$user_job_server" = xyes],
486 echo "WARNING: Make job server requires a POSIX-ish system that"
487 echo " supports the pipe(), sigaction(), and either"
488 echo " waitpid() or wait3() functions. Your system doesn't"
489 echo " appear to provide one or more of those."
490 echo " Disabling job server support."
494 AS_IF([test "x$make_cv_load" = xno && test "x$user_load" = xyes],
496 echo "WARNING: 'load' support requires a POSIX-ish system that"
497 echo " supports the dlopen(), dlsym(), and dlerror() functions."
498 echo " Your system doesn't appear to provide one or more of these."
499 echo " Disabling 'load' support."
503 # Specify what files are to be created.
504 AC_CONFIG_FILES([Makefile glob/Makefile po/Makefile.in config/Makefile \
505 doc/Makefile w32/Makefile tests/config-flags.pm])
511 # We only generate the build.sh if we have a build.sh.in; we won't have
512 # one before we've created a distribution.
513 AS_IF([test -f "$srcdir/build.sh.in"],
514 [ ./config.status --file build.sh
519 dnl comment-start: "dnl "
521 dnl comment-start-skip: "\\bdnl\\b\\s *"
522 dnl compile-command: "make configure config.h.in"