File: configure.in

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scheme48 1.9.2-2
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dnl Part of Scheme 48 1.9.  See file COPYING for notices and license.
dnl
dnl Authors: Richard Kelsey, Jonathan Rees, Mike Sperber, Marcus
dnl Crestani, Eric Knauel, David Frese, Ivan Shmakov, Taylor Campbell,
dnl Will Noble
dnl
dnl Process this file with autoconf >= 2.60 to produce a configure script.
dnl To do this, run:
dnl   env ACLOCAL="aclocal -I m4" autoreconf -v -i
dnl
AC_PREREQ([2.60])dnl
dnl
dnl We might want AC_WORDS_BIGENDIAN in the future.
dnl We might want AC_CHAR_UNSIGNED in the future.
dnl
dnl
dnl
dnl
AC_INIT(c/prescheme.h)
     AC_CONFIG_HEADER(c/sysdep.h)
     AC_CONFIG_HEADER(c/scheme48arch.h)
     AC_CANONICAL_HOST
     dnl set the cross-compile flag before we try anything.
     AC_TRY_RUN([int main() { return 0;}], [], [], [true])
     S48_CC
     S48_PICK_GC
     S48_ENABLE_FORCE_32BIT
     S48_DETERMINE_BITS_PER_BYTE
     S48_DETERMINE_POINTER_SIZE
     S48_DETERMINE_BIT_SUFFIX
     S48_ENABLE_UNIVERSAL_BINARY
     S48_OSX_ARCH_FLAGS($S48_BUILD_UNIVERSAL_P,$S48_FORCE_32_P)
     S48_PIC_OPTION_NAME
     S48_CREATE_BUILD_DIRS
     S48_LDFLAGS
     AC_ISC_POSIX
     AC_SYS_LARGEFILE
     S48_INLINE
     AC_PROG_INSTALL
     AC_CHECK_LIB(m, main)
     AC_CHECK_LIB(dl, main)
     AC_CHECK_LIB(mld, main)
     AC_CHECK_LIB(nsl, main)
     AC_CHECK_LIB(gen, main)
     AC_CHECK_LIB(socket, main)
     AC_CHECK_LIB(sun, getpwnam)
     S48_POSIX_LIBC
     S48_TM_GMTOFF
     AC_CONST
     AC_MSG_CHECKING(for socklen_t)
     AC_TRY_COMPILE([#include <sys/types.h>
                     #include <sys/socket.h>
                     socklen_t x;
                    ],[],
		    [AC_MSG_RESULT(yes)],
		    [AC_TRY_COMPILE([#include <sys/types.h>
                                     #include <sys/socket.h>
                                     int accept (int,
				                 struct sockaddr *,
						 size_t *);
                                    ],[],
		                    [AC_MSG_RESULT(size_t)
                                     AC_DEFINE(socklen_t,size_t)],
				    [AC_MSG_RESULT(int)
                                     AC_DEFINE(socklen_t,int)])])
     AC_RETSIGTYPE
     AC_TYPE_UINTPTR_T
     AC_TYPE_UINT16_T
     AC_CHECK_HEADERS(libgen.h sys/timeb.h posix/time.h)
     AC_CHECK_HEADERS(sys/select.h)
     AC_CHECK_HEADERS(sysexits.h)
     AC_CHECK_HEADERS(langinfo.h)
     AC_CHECK_FUNC(nl_langinfo, [], [AC_LIBOBJ([c/fake/langinfo])])
     AC_CHECK_FUNCS(gettimeofday ftime select setitimer sigaction execvpe)
     AC_CHECK_HEADERS(poll.h)
     AC_CHECK_FUNCS(poll)
     S48_GLIB
     AC_CHECK_FUNCS(dlopen)
     AC_CHECK_FUNCS(socket chroot)
     AC_CHECK_FUNC(strerror,
                   [AC_DEFINE(HAVE_STRERROR, 1,
                              [Define to 1 if you have the `strerror'
                               function.])],
                   [AC_LIBOBJ([c/fake/strerror.o])])
dnl Some idiot renamed `environ' as `__environ' in some versions of Linux.
dnl POSIX says it's `environ'.
     AC_MSG_CHECKING([environ])
     AC_TRY_LINK([],
		 [extern char **environ;
		  if (environ)
		     return 0;
		  else
		     return 1;],
               dnl Have `environ'
		 [AC_DEFINE(ENVIRON_NAME,environ)
		  AC_MSG_RESULT([using environ])],
               dnl Do not have `environ'
	         [AC_TRY_LINK([],
		              [extern char **__environ;
			       if (__environ)
			         return 0;   
			       else
				 return 1;],
                            dnl Have `__environ'
		               [AC_DEFINE(ENVIRON_NAME,__environ)
	     		        AC_MSG_RESULT([using __environ])],
                           dnl Do not have `__environ'
                               [AC_MSG_WARN([no environ variable found])
                                AC_LIBOBJ([c/fake/environ.o])])])
     S48_IEEE_ENDIANNESS($S48_BUILD_UNIVERSAL_P)
     S48_NATIVE_CODE
     S48_DYNAMIC_EXTERNALS
     S48_PTHREADS
     S48_MISALIGNED_DOUBLES
     AC_SUBST(CFLAGS)
     AC_SUBST(CPPFLAGS)
     AC_SUBST(LDFLAGS)
     AC_SUBST(LD)
     AC_SUBST(DYNAMIC_EXTERNALS_CFLAGS)
     AC_SUBST(DYNAMIC_EXTERNALS_LDFLAGS)
     AC_SUBST(DYNAMIC_EXTERNALS_LDFLAGS_IN_PLACE)
     AC_SUBST(GC_OBJS)
     AC_SUBST(ADDITIONAL_EXTERNALS)
     AC_SUBST(ADDITIONAL_EXTERNAL_OBJS)
     AC_SUBST(BIT_SUFFIX)
     dnl More payload for Autoheader
     AH_TEMPLATE([ENVIRON_NAME],
                 [Define to the name of the `environ' variable.])
     AH_TEMPLATE([HAVE_GLIB],
                 [Define to 1 if you have the `glib' library.])
     AH_TEMPLATE([socklen_t],
                 [Define to the type to be used instead of `socklen_t'
                  if the system does not define the latter.])
     AH_BOTTOM([
#include "fake/sigact.h"
#include "fake/strerror.h"
#include "fake/sys-select.h"
#include "fake/environ.h"
#include "fake/sysexits.h"
#include "fake/langinfo.h"])
AC_OUTPUT(Makefile)