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make/configure.ac
Paul Smith ec09ec775a * <all>: Update copyright notices.
2022-02-10 14:48:26 -05:00

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# Process this file with autoconf to produce a configure script.
#
# Copyright (C) 1993-2022 Free Software Foundation, Inc.
# This file is part of GNU Make.
#
# GNU Make is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation; either version 3 of the License, or (at your option) any later
# version.
#
# GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program. If not, see <http://www.gnu.org/licenses/>.
AC_INIT([GNU make],[4.3.90],[bug-make@gnu.org])
AC_PREREQ([2.69])
# Autoconf setup
AC_CONFIG_AUX_DIR([build-aux])
AC_CONFIG_SRCDIR([src/vpath.c])
AC_CONFIG_HEADERS([src/config.h])
AC_CONFIG_LIBOBJ_DIR([lib])
# Automake setup
# We have to enable "foreign" because ChangeLog is auto-generated
# Automake 1.15 and gnulib don't get along: gnulib has some strange error
# in the way it handles getloadavg.c which causes make distcheck to fail.
# http://lists.gnu.org/archive/html/bug-gnulib/2018-06/msg00024.html
AM_INIT_AUTOMAKE([1.16.1 foreign -Werror -Wall])
# Checks for programs.
AC_USE_SYSTEM_EXTENSIONS
AC_PROG_CC
# GNU Gnulib requires C99, so I guess we might as well too...
AC_PROG_CC_C99
# Configure gnulib
gl_EARLY
gl_INIT
AC_PROG_INSTALL
AC_PROG_RANLIB
AC_PROG_CPP
AC_CHECK_PROG([AR], [ar], [ar], [ar])
# Perl is needed for the test suite (only)
AC_CHECK_PROG([PERL], [perl], [perl], [perl])
# Specialized system macros
AC_CANONICAL_HOST
AC_AIX
AC_ISC_POSIX
AC_MINIX
AC_C_BIGENDIAN
# Enable gettext, in "external" mode.
AM_GNU_GETTEXT_VERSION([0.19.4])
AM_GNU_GETTEXT([external])
# This test must come as early as possible after the compiler configuration
# tests, because the choice of the file model can (in principle) affect
# whether functions and headers are available, whether they work, etc.
AC_SYS_LARGEFILE
# Checks for libraries.
AC_SEARCH_LIBS([getpwnam], [sun])
# Checks for header files.
AC_HEADER_STDC
AC_HEADER_DIRENT
AC_HEADER_STAT
AC_HEADER_TIME
AC_CHECK_HEADERS([stdlib.h locale.h unistd.h limits.h fcntl.h string.h \
memory.h sys/param.h sys/resource.h sys/time.h sys/timeb.h \
sys/select.h sys/file.h spawn.h])
AM_PROG_CC_C_O
AC_C_CONST
AC_TYPE_SIGNAL
AC_TYPE_UID_T
AC_TYPE_PID_T
AC_TYPE_OFF_T
AC_TYPE_SIZE_T
AC_TYPE_SSIZE_T
AC_TYPE_UINTMAX_T
# Find out whether our struct stat returns nanosecond resolution timestamps.
AC_STRUCT_ST_MTIM_NSEC
AC_CACHE_CHECK([whether to use high resolution file timestamps],
[make_cv_file_timestamp_hi_res],
[ make_cv_file_timestamp_hi_res=no
AS_IF([test "$ac_cv_struct_st_mtim_nsec" != no],
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#if HAVE_INTTYPES_H
# include <inttypes.h>
#endif]],
[[char a[0x7fffffff < (uintmax_t)-1 >> 30 ? 1 : -1];]])],
[make_cv_file_timestamp_hi_res=yes])
])])
AS_IF([test "$make_cv_file_timestamp_hi_res" = yes], [val=1], [val=0])
AC_DEFINE_UNQUOTED([FILE_TIMESTAMP_HI_RES], [$val],
[Use high resolution file timestamps if nonzero.])
AS_IF([test "$make_cv_file_timestamp_hi_res" = yes],
[ # Solaris 2.5.1 needs -lposix4 to get the clock_gettime function.
# Solaris 7 prefers the library name -lrt to the obsolescent name -lposix4.
AC_SEARCH_LIBS([clock_gettime], [rt posix4])
AS_IF([test "$ac_cv_search_clock_gettime" != no],
[ AC_DEFINE([HAVE_CLOCK_GETTIME], [1],
[Define to 1 if you have the clock_gettime function.])
])
])
# Check for DOS-style pathnames.
pds_AC_DOS_PATHS
# See if we have a standard version of gettimeofday(). Since actual
# implementations can differ, just make sure we have the most common
# one.
AC_CACHE_CHECK([for standard gettimeofday], [ac_cv_func_gettimeofday],
[ac_cv_func_gettimeofday=no
AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <sys/time.h>
int main ()
{
struct timeval t; t.tv_sec = -1; t.tv_usec = -1;
return gettimeofday (&t, 0) != 0
|| t.tv_sec < 0 || t.tv_usec < 0;
}]])],
[ac_cv_func_gettimeofday=yes],
[ac_cv_func_gettimeofday=no],
[ac_cv_func_gettimeofday="no (cross-compiling)"])])
AS_IF([test "$ac_cv_func_gettimeofday" = yes],
[ AC_DEFINE([HAVE_GETTIMEOFDAY], [1],
[Define to 1 if you have a standard gettimeofday function])
])
AC_CHECK_FUNCS([strdup strndup memrchr umask mkstemp mktemp fdopen \
dup dup2 getcwd realpath sigsetmask sigaction \
getgroups seteuid setegid setlinebuf setreuid setregid \
getrlimit setrlimit setvbuf pipe strsignal \
lstat readlink atexit isatty ttyname pselect posix_spawn \
posix_spawnattr_setsigmask])
# We need to check declarations, not just existence, because on Tru64 this
# function is not declared without special flags, which themselves cause
# other problems. We'll just use our own.
AC_CHECK_DECLS([bsd_signal], [], [], [[#define _GNU_SOURCE 1
#include <signal.h>]])
AC_FUNC_FORK
AC_FUNC_SETVBUF_REVERSED
# Rumor has it that strcasecmp lives in -lresolv on some odd systems.
# It doesn't hurt much to use our own if we can't find it so I don't
# make the effort here.
AC_CHECK_FUNCS([strcasecmp strncasecmp strcmpi strncmpi stricmp strnicmp])
# strcoll() is used by the GNU glob library
AC_FUNC_STRCOLL
AC_FUNC_CLOSEDIR_VOID
# dir.c and our glob.c use dirent.d_type if available
AC_STRUCT_DIRENT_D_TYPE
# See if the user wants to add (or not) GNU Guile support
AC_ARG_WITH([guile], [AS_HELP_STRING([--with-guile],
[Support GNU Guile for embedded scripting])])
# Annoyingly, each version of Guile comes with it's own PC file so we have to
# specify them as individual packages. Ugh.
PKG_PROG_PKG_CONFIG
AS_IF([test "x$with_guile" != xno],
[ guile_versions="3.0 2.2 2.0 1.8"
guile_version=no
have_guile=no
AC_MSG_CHECKING([for GNU Guile])
for v in $guile_versions; do
PKG_CHECK_EXISTS([guile-$v], [guile_version=$v; have_guile=yes; break], [])
done
AC_MSG_RESULT([$guile_version])
AS_IF([test "$have_guile" = yes],
[ PKG_CHECK_MODULES(GUILE, [guile-$guile_version])
# Unfortunately Guile requires a C99 compiler but GNU make doesn't, so
# verify we can actually compile the header.
keep_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS $pkg_cv_GUILE_CFLAGS"
AC_CHECK_HEADER([libguile.h],
[AC_DEFINE([HAVE_GUILE], [1], [Embed GNU Guile support])],
[have_guile=no],
[/* Avoid configuration error warnings. */])
CPPFLAGS="$keep_CPPFLAGS"
])
])
AM_CONDITIONAL([HAVE_GUILE], [test "$have_guile" = "yes"])
AC_CHECK_DECLS([sys_siglist, _sys_siglist, __sys_siglist], , ,
[AC_INCLUDES_DEFAULT
#include <signal.h>
/* NetBSD declares sys_siglist in unistd.h. */
#if HAVE_UNISTD_H
# include <unistd.h>
#endif
])
# Check out the wait reality.
AC_CHECK_HEADERS([sys/wait.h],[],[],[[#include <sys/types.h>]])
AC_CHECK_FUNCS([waitpid wait3])
AC_CACHE_CHECK([for union wait], [make_cv_union_wait],
[ AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
#include <sys/wait.h>]],
[[union wait status; int pid; pid = wait (&status);
#ifdef WEXITSTATUS
/* Some POSIXoid systems have both the new-style macros and the old
union wait type, and they do not work together. If union wait
conflicts with WEXITSTATUS et al, we don't want to use it at all. */
if (WEXITSTATUS (status) != 0) pid = -1;
#ifdef WTERMSIG
/* If we have WEXITSTATUS and WTERMSIG, just use them on ints. */
-- blow chunks here --
#endif
#endif
#ifdef HAVE_WAITPID
/* Make sure union wait works with waitpid. */
pid = waitpid (-1, &status, 0);
#endif
]])],
[make_cv_union_wait=yes],
[make_cv_union_wait=no])
])
AS_IF([test "$make_cv_union_wait" = yes],
[ AC_DEFINE([HAVE_UNION_WAIT], [1],
[Define to 1 if you have the 'union wait' type in <sys/wait.h>.])
])
# If we're building on Windows/DOS/OS/2, add some support for DOS drive specs.
AS_IF([test "$PATH_SEPARATOR" = ';'],
[ AC_DEFINE([HAVE_DOS_PATHS], [1],
[Define to 1 if your system requires backslashes or drive specs in pathnames.])
])
# See if the user wants to use pmake's "customs" distributed build capability
AC_SUBST([REMOTE]) REMOTE=stub
use_customs=false
AC_ARG_WITH([customs],
[AC_HELP_STRING([--with-customs=DIR],
[enable remote jobs via Customs--see README.customs])],
[ AS_CASE([$withval], [n|no], [:],
[make_cppflags="$CPPFLAGS"
AS_CASE([$withval],
[y|ye|yes], [:],
[CPPFLAGS="$CPPFLAGS -I$with_customs/include/customs"
make_ldflags="$LDFLAGS -L$with_customs/lib"])
CF_NETLIBS
AC_CHECK_HEADER([customs.h],
[use_customs=true
REMOTE=cstms
LIBS="$LIBS -lcustoms" LDFLAGS="$make_ldflags"],
[with_customs=no
CPPFLAGS="$make_cppflags" make_badcust=yes])
])
])
# Tell automake about this, so it can include the right .c files.
AM_CONDITIONAL([USE_CUSTOMS], [test "$use_customs" = true])
# See if the user asked to handle case insensitive file systems.
AH_TEMPLATE([HAVE_CASE_INSENSITIVE_FS], [Use case insensitive file names])
AC_ARG_ENABLE([case-insensitive-file-system],
AC_HELP_STRING([--enable-case-insensitive-file-system],
[assume file systems are case insensitive]),
[AS_IF([test "$enableval" = yes], [AC_DEFINE([HAVE_CASE_INSENSITIVE_FS])])])
# See if we can handle the job server feature, and if the user wants it.
AC_ARG_ENABLE([job-server],
AC_HELP_STRING([--disable-job-server],
[disallow recursive make communication during -jN]),
[make_cv_job_server="$enableval" user_job_server="$enableval"],
[make_cv_job_server="yes"])
AS_IF([test "$ac_cv_func_waitpid" = no && test "$ac_cv_func_wait3" = no],
[has_wait_nohang=no],
[has_wait_nohang=yes])
AC_CACHE_CHECK([for SA_RESTART], [make_cv_sa_restart], [
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <signal.h>]],
[[return SA_RESTART;]])],
[make_cv_sa_restart=yes],
[make_cv_sa_restart=no])])
AS_IF([test "$make_cv_sa_restart" != no],
[ AC_DEFINE([HAVE_SA_RESTART], [1],
[Define to 1 if <signal.h> defines the SA_RESTART constant.])
])
# Only allow jobserver on systems that support it
AS_CASE([/$ac_cv_func_pipe/$ac_cv_func_sigaction/$make_cv_sa_restart/$has_wait_nohang/],
[*/no/*], [make_cv_job_server=no])
# Also supported on OS2 and MinGW
AS_CASE([$host_os], [os2*|mingw*], [make_cv_job_server=yes])
# If we support it and the user didn't disable it, build with jobserver
AS_CASE([/$make_cv_job_server/$user_job_server/],
[*/no/*], [: no jobserver],
[AC_DEFINE(MAKE_JOBSERVER, 1,
[Define to 1 to enable job server support in GNU make.])
])
# If dl*() functions are supported we can enable the load operation
AC_CHECK_DECLS([dlopen, dlsym, dlerror], [], [],
[[#include <dlfcn.h>]])
AC_ARG_ENABLE([load],
AC_HELP_STRING([--disable-load],
[disable support for the 'load' operation]),
[make_cv_load="$enableval" user_load="$enableval"],
[make_cv_load="yes"])
AS_CASE([/$ac_cv_have_decl_dlopen/$ac_cv_have_decl_dlsym/$ac_cv_have_decl_dlerror/],
[*/no/*], [make_cv_load=no])
# We might need -ldl
AS_IF([test "$make_cv_load" = yes], [
AC_SEARCH_LIBS([dlopen], [dl], [], [make_cv_load=])
])
AS_CASE([/$make_cv_load/$user_load/],
[*/no/*], [make_cv_load=no],
[AC_DEFINE(MAKE_LOAD, 1,
[Define to 1 to enable 'load' support in GNU make.])
])
# If we want load support, we might need to link with export-dynamic.
# See if we can figure it out. Unfortunately this is very difficult.
# For example passing -rdynamic to the SunPRO linker gives a warning
# but succeeds and creates a shared object, not an executable!
AS_IF([test "$make_cv_load" = yes], [
AC_MSG_CHECKING([If the linker accepts -Wl,--export-dynamic])
old_LDFLAGS="$LDFLAGS"
LDFLAGS="$LDFLAGS -Wl,--export-dynamic"
AC_LINK_IFELSE([AC_LANG_SOURCE([int main(){}])],
[AC_MSG_RESULT([yes])
AC_SUBST([AM_LDFLAGS], [-Wl,--export-dynamic])],
[AC_MSG_RESULT([no])
AC_MSG_CHECKING([If the linker accepts -rdynamic])
LDFLAGS="$old_LDFLAGS -rdynamic"
AC_LINK_IFELSE([AC_LANG_SOURCE([int main(){}])],
[AC_MSG_RESULT([yes])
AC_SUBST([AM_LDFLAGS], [-rdynamic])],
[AC_MSG_RESULT([no])])
])
LDFLAGS="$old_LDFLAGS"
])
# if we have both lstat() and readlink() then we can support symlink
# timechecks.
AS_IF([test "$ac_cv_func_lstat" = yes && test "$ac_cv_func_readlink" = yes],
[ AC_DEFINE([MAKE_SYMLINKS], [1],
[Define to 1 to enable symbolic link timestamp checking.])
])
# Use posix_spawn if we have support and the user didn't disable it
AC_ARG_ENABLE([posix-spawn],
AC_HELP_STRING([--disable-posix-spawn],
[disable support for posix_spawn()]),
[make_cv_posix_spawn="$enableval" user_posix_spawn="$enableval"],
[make_cv_posix_spawn="yes"])
AS_CASE([/$ac_cv_header_spawn/$ac_cv_func_posix_spawn/],
[*/no/*], [make_cv_posix_spawn=no])
AS_IF([test "$make_cv_posix_spawn" = yes],
AC_CACHE_CHECK([for posix_spawn that fails synchronously],
[make_cv_synchronous_posix_spawn],
[make_cv_synchronous_posix_spawn=no
AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <spawn.h>
#include <string.h>
extern char **environ;
int main() {
char* path = strdup("./non-existent");
char *argv[[2]];
argv[[0]] = path;
argv[[1]] = 0;
return posix_spawn(0, path, 0, 0, argv, environ);
}]])],
[make_cv_synchronous_posix_spawn=no],
[make_cv_synchronous_posix_spawn=yes],
[make_cv_synchronous_posix_spawn="no (cross-compiling)"])]))
AS_CASE([/$user_posix_spawn/$make_cv_posix_spawn/$make_cv_synchronous_posix_spawn/],
[*/no/*], [make_cv_posix_spawn=no],
[AC_DEFINE(USE_POSIX_SPAWN, 1, [Define to 1 to use posix_spawn().])
])
# Find the SCCS commands, so we can include them in our default rules.
AC_CACHE_CHECK([for location of SCCS get command], [make_cv_path_sccs_get], [
AS_IF([test -f /usr/sccs/get],
[make_cv_path_sccs_get=/usr/sccs/get],
[make_cv_path_sccs_get=get])
])
AC_DEFINE_UNQUOTED([SCCS_GET], ["$make_cv_path_sccs_get"],
[Define to the name of the SCCS 'get' command.])
ac_clean_files="$ac_clean_files s.conftest conftoast" # Remove these later.
AS_IF([(/usr/sccs/admin -n s.conftest || admin -n s.conftest) >/dev/null 2>&1 &&
test -f s.conftest],
[ # We successfully created an SCCS file.
AC_CACHE_CHECK([if SCCS get command understands -G], [make_cv_sys_get_minus_G],
[AS_IF([$make_cv_path_sccs_get -Gconftoast s.conftest >/dev/null 2>&1 &&
test -f conftoast],
[make_cv_sys_get_minus_G=yes],
[make_cv_sys_get_minus_G=no])
])
AS_IF([test "$make_cv_sys_get_minus_G" = yes],
[AC_DEFINE([SCCS_GET_MINUS_G], [1],
[Define to 1 if the SCCS 'get' command understands the '-G<file>' option.])
])
])
rm -f s.conftest conftoast
# Let the makefile know what our build host is
AC_DEFINE_UNQUOTED([MAKE_HOST],["$host"],[Build host information.])
MAKE_HOST="$host"
AC_SUBST([MAKE_HOST])
w32_target_env=no
AM_CONDITIONAL([WINDOWSENV], [false])
AS_CASE([$host],
[*-*-mingw32],
[AM_CONDITIONAL([WINDOWSENV], [true])
w32_target_env=yes
AC_DEFINE([WINDOWS32], [1], [Use platform specific coding])
AC_DEFINE([HAVE_DOS_PATHS], [1], [Use platform specific coding])
])
AC_DEFINE_UNQUOTED([PATH_SEPARATOR_CHAR],['$PATH_SEPARATOR'],
[Define to the character that separates directories in PATH.])
# Include the Maintainer's Makefile section, if it's here.
MAINT_MAKEFILE=/dev/null
AS_IF([test -r "$srcdir/maintMakefile"],
[ MAINT_MAKEFILE="$srcdir/maintMakefile"
])
AC_SUBST_FILE([MAINT_MAKEFILE])
# Allow building with dmalloc
AM_WITH_DMALLOC
# Forcibly disable SET_MAKE. If it's set it breaks things like the test
# scripts, etc.
SET_MAKE=
# Sanity check and inform the user of what we found
AS_IF([test "x$make_badcust" = xyes], [
echo
echo "WARNING: --with-customs specified but no customs.h could be found;"
echo " disabling Customs support."
echo
])
AS_CASE([$with_customs],
[""|n|no|y|ye|yes], [:],
[AS_IF([test -f "$with_customs/lib/libcustoms.a"], [:],
[ echo
echo "WARNING: '$with_customs/lib' does not appear to contain the"
echo " Customs library. You must build and install Customs"
echo " before compiling GNU make."
echo
])])
AS_IF([test "x$has_wait_nohang" = xno],
[ echo
echo "WARNING: Your system has neither waitpid() nor wait3()."
echo " Without one of these, signal handling is unreliable."
echo " You should be aware that running GNU make with -j"
echo " could result in erratic behavior."
echo
])
AS_IF([test "x$make_cv_job_server" = xno && test "x$user_job_server" = xyes],
[ echo
echo "WARNING: Make job server requires a POSIX-ish system that"
echo " supports the pipe(), sigaction(), and either"
echo " waitpid() or wait3() functions. Your system doesn't"
echo " appear to provide one or more of those."
echo " Disabling job server support."
echo
])
AS_IF([test "x$make_cv_load" = xno && test "x$user_load" = xyes],
[ echo
echo "WARNING: 'load' support requires a POSIX-ish system that"
echo " supports the dlopen(), dlsym(), and dlerror() functions."
echo " Your system doesn't appear to provide one or more of these."
echo " Disabling 'load' support."
echo
])
AS_IF([test "x$make_cv_posix_spawn" = xno && test "x$user_posix_spawn" = xyes],
[ echo
echo "WARNING: posix_spawn() is not supported on this system."
echo
])
# autoconf initializes $prefix to NONE.
AM_CONDITIONAL([KNOWN_PREFIX],
[test "x$prefix" = xNONE -o "x$prefix" = x/usr/local \
-o "x$prefix" = x/usr/gnu -o "x$prefix" = x/usr])
# Specify what files are to be created.
AC_CONFIG_FILES([Makefile build.cfg lib/Makefile po/Makefile.in doc/Makefile \
tests/config-flags.pm])
# We don't need this: the standard automake output suffices for POSIX systems.
#mk/Posix.mk
# Put build.sh in the build directory so it's easy to find
AC_CONFIG_LINKS([build.sh:build.sh])
# OK, do it!
AC_OUTPUT
dnl Local Variables:
dnl comment-start: "dnl "
dnl comment-end: ""
dnl comment-start-skip: "\\bdnl\\b\\s *"
dnl compile-command: "make configure config.h.in"
dnl End:
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