scsh-0.6/configure.in

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1999-09-14 08:45:02 -04:00
dnl Process this file with autoconf to produce a configure script.
dnl
dnl We might want AC_WORDS_BIGENDIAN in the future.
dnl We might want AC_CHAR_UNSIGNED in the future.
dnl
dnl The -cckr (K&R) flag is for the IRIX C compiler. If this is left
dnl out, scheme48vm.c breaks because the rather pedantic SGI compiler
dnl decides that a char is not the same thing as an unsigned char.
dnl - Bryan O'Sullivan 3/94
dnl Note, this test didn't work correctly on Sun's which take -cckr as a
dnl synonym for -c. (HCC)
define(S48_CFLAG_CKR, [dnl
if test "z$GCC" = z; then
AC_MSG_CHECKING([-cckr])
oldCFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -cckr"
AC_TRY_RUN([int main() { return 0;}],
[AC_MSG_RESULT(yes)],
[AC_MSG_RESULT(no)
CFLAGS="$oldCFLAGS"],
[AC_MSG_RESULT(no)
CFLAGS="$oldCFLAGS"])
fi
])dnl
dnl
define(S48_POSIX_LIBC, [dnl
echo checking for RISC/OS POSIX library lossage
if test -f /usr/posix/usr/lib/libc.a; then
LIBS="${LIBS} /usr/posix/usr/lib/libc.a"
fi
])dnl
dnl
dnl Run AC_PROG_CC, but don't accept it's changes to CFLAGS.
dnl For some insane reason, it sets CFLAGS to either `-O' or `-g -O' for gcc.
dnl I don't want the silly -g (because if you are using nlist, you can't strip
dnl the binary), I want -O2 for gcc and -O for other C compilers.
define(S48_PROG_CC, [dnl
oldCFLAGS="$CFLAGS"
AC_PROG_CC
if test "z$oldCFLAGS" = z; then
if test "z$GCC" = z; then
CFLAGS='-O'
else
CFLAGS='-O2'
fi
fi
])dnl
dnl
dnl Linux/ELF systems need the -rdynamic flag when linking so that
dnl dlsym() can find symbols in the executable.
dnl Note, on some Sun's, you can link with -rdynamic but the resulting
dnl a.out always core dumps.
define(S48_RDYNAMIC, [dnl
AC_MSG_CHECKING([link with -rdynamic])
AC_TRY_COMPILE([],
[#if defined(__linux__) && defined(__ELF__)
this must not compile
#endif],
[AC_MSG_RESULT(no)],
[AC_MSG_RESULT(yes)
LDFLAGS="$LDFLAGS -rdynamic"])
])dnl
dnl
define(S48_USCORE, [dnl
AC_MSG_CHECKING([underscore before symbols])
echo 'main() { return 0; } fnord() {}' >conftest.c
if ${CC} ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c ${LIBS} &&
nm a.out | grep _fnord >/dev/null; then
AC_MSG_RESULT([yes])
AC_DEFINE(USCORE)
else
AC_MSG_RESULT([no])
fi
rm -f conftest.c a.out
])dnl
dnl
AC_INIT(c/scheme48vm.c)
AC_CONFIG_HEADER(c/sysdep.h)
S48_PROG_CC
AC_ISC_POSIX
dnl set the cross-compile flag before we try anything.
AC_TRY_RUN([int main() { return 0;}], [], [], [true])
S48_CFLAG_CKR
AC_PROG_INSTALL
AC_CHECK_LIB(m, main)
AC_CHECK_LIB(dl, main)
AC_CHECK_LIB(mld, main)
AC_CHECK_LIB(nsl, main)
AC_CHECK_LIB(gen, main)
AC_CHECK_LIB(socket, main)
AC_CHECK_LIB(sun, getpwnam)
dnl Solaris 2.3 seems to need -lelf for nlist(). (tnx Bryan O'Sullivan)
AC_CHECK_LIB(elf, main)
S48_POSIX_LIBC
AC_CONST
AC_RETSIGTYPE
AC_CHECK_HEADERS(libgen.h sys/timeb.h posix/time.h)
AC_CHECK_HEADERS(sys/select.h)
AC_CHECK_FUNCS(gettimeofday ftime nlist select setitimer sigaction)
AC_CHECK_FUNC(dlopen, AC_DEFINE(HAVE_DLOPEN),
AC_CHECK_FUNC(nlist, [LIBOBJS="$LIBOBJS c/fake/libdl1.c],
[LIBOBJS="$LIBOBJS c/fake/libdl2.c]))
AC_CHECK_FUNCS(socket chroot)
AC_CHECK_FUNC(strerror, AC_DEFINE(HAVE_STRERROR),
[LIBOBJS="$LIBOBJS c/fake/strerror.o"])
AC_MSG_CHECKING([n_name])
AC_TRY_LINK([#include <nlist.h>],
[struct nlist name_list;
name_list.n_name = "foo";],
AC_DEFINE(NLIST_HAS_N_NAME)
AC_MSG_RESULT([yes]),
AC_MSG_RESULT([no]))
AC_MSG_CHECKING([__NEXT__])
AC_TRY_LINK(,[
#ifdef __NeXT__
return 0;
#else
fail
#endif
],
CC="$CC -posix"
AC_DEFINE(HAVE_SIGACTION)
AC_MSG_RESULT([yes]),
AC_MSG_RESULT([no]))
S48_USCORE
S48_RDYNAMIC
AC_SUBST(CFLAGS)
AC_SUBST(LIBOBJS)
AC_SUBST(LDFLAGS)
AC_OUTPUT(Makefile)