1999-09-14 08:45:02 -04:00
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dnl Process this file with autoconf to produce a configure script.
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dnl
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dnl We might want AC_WORDS_BIGENDIAN in the future.
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dnl We might want AC_CHAR_UNSIGNED in the future.
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dnl
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dnl The -cckr (K&R) flag is for the IRIX C compiler. If this is left
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dnl out, scheme48vm.c breaks because the rather pedantic SGI compiler
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dnl decides that a char is not the same thing as an unsigned char.
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dnl - Bryan O'Sullivan 3/94
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dnl Note, this test didn't work correctly on Sun's which take -cckr as a
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dnl synonym for -c. (HCC)
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1999-09-14 21:06:21 -04:00
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dnl JMG: hack hack hack
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AR=${AR-"ar cq"}
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1999-09-14 08:45:02 -04:00
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define(S48_CFLAG_CKR, [dnl
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if test "z$GCC" = z; then
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AC_MSG_CHECKING([-cckr])
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oldCFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -cckr"
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AC_TRY_RUN([int main() { return 0;}],
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[AC_MSG_RESULT(yes)],
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[AC_MSG_RESULT(no)
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CFLAGS="$oldCFLAGS"],
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[AC_MSG_RESULT(no)
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CFLAGS="$oldCFLAGS"])
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fi
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])dnl
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dnl
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define(S48_POSIX_LIBC, [dnl
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echo checking for RISC/OS POSIX library lossage
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if test -f /usr/posix/usr/lib/libc.a; then
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LIBS="${LIBS} /usr/posix/usr/lib/libc.a"
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fi
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])dnl
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dnl
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dnl Run AC_PROG_CC, but don't accept it's changes to CFLAGS.
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dnl For some insane reason, it sets CFLAGS to either `-O' or `-g -O' for gcc.
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dnl I don't want the silly -g (because if you are using nlist, you can't strip
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dnl the binary), I want -O2 for gcc and -O for other C compilers.
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define(S48_PROG_CC, [dnl
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oldCFLAGS="$CFLAGS"
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AC_PROG_CC
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if test "z$oldCFLAGS" = z; then
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if test "z$GCC" = z; then
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CFLAGS='-O'
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else
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CFLAGS='-O2'
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fi
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fi
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])dnl
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dnl
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dnl Linux/ELF systems need the -rdynamic flag when linking so that
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dnl dlsym() can find symbols in the executable.
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dnl Note, on some Sun's, you can link with -rdynamic but the resulting
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dnl a.out always core dumps.
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define(S48_RDYNAMIC, [dnl
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AC_MSG_CHECKING([link with -rdynamic])
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AC_TRY_COMPILE([],
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[#if defined(__linux__) && defined(__ELF__)
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this must not compile
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#endif],
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[AC_MSG_RESULT(no)],
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[AC_MSG_RESULT(yes)
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LDFLAGS="$LDFLAGS -rdynamic"])
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])dnl
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dnl
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define(S48_USCORE, [dnl
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AC_MSG_CHECKING([underscore before symbols])
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echo 'main() { return 0; } fnord() {}' >conftest.c
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if ${CC} ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c ${LIBS} &&
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nm a.out | grep _fnord >/dev/null; then
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AC_MSG_RESULT([yes])
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AC_DEFINE(USCORE)
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else
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AC_MSG_RESULT([no])
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fi
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rm -f conftest.c a.out
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])dnl
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dnl
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AC_INIT(c/scheme48vm.c)
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AC_CONFIG_HEADER(c/sysdep.h)
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S48_PROG_CC
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AC_ISC_POSIX
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dnl set the cross-compile flag before we try anything.
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AC_TRY_RUN([int main() { return 0;}], [], [], [true])
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S48_CFLAG_CKR
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AC_PROG_INSTALL
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AC_CHECK_LIB(m, main)
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AC_CHECK_LIB(dl, main)
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AC_CHECK_LIB(mld, main)
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AC_CHECK_LIB(nsl, main)
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AC_CHECK_LIB(gen, main)
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AC_CHECK_LIB(socket, main)
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AC_CHECK_LIB(sun, getpwnam)
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dnl Solaris 2.3 seems to need -lelf for nlist(). (tnx Bryan O'Sullivan)
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AC_CHECK_LIB(elf, main)
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S48_POSIX_LIBC
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AC_CONST
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AC_RETSIGTYPE
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AC_CHECK_HEADERS(libgen.h sys/timeb.h posix/time.h)
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AC_CHECK_HEADERS(sys/select.h)
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AC_CHECK_FUNCS(gettimeofday ftime nlist select setitimer sigaction)
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AC_CHECK_FUNC(dlopen, AC_DEFINE(HAVE_DLOPEN),
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AC_CHECK_FUNC(nlist, [LIBOBJS="$LIBOBJS c/fake/libdl1.c],
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[LIBOBJS="$LIBOBJS c/fake/libdl2.c]))
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AC_CHECK_FUNCS(socket chroot)
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AC_CHECK_FUNC(strerror, AC_DEFINE(HAVE_STRERROR),
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[LIBOBJS="$LIBOBJS c/fake/strerror.o"])
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AC_MSG_CHECKING([n_name])
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AC_TRY_LINK([#include <nlist.h>],
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[struct nlist name_list;
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name_list.n_name = "foo";],
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AC_DEFINE(NLIST_HAS_N_NAME)
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AC_MSG_RESULT([yes]),
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AC_MSG_RESULT([no]))
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AC_MSG_CHECKING([__NEXT__])
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AC_TRY_LINK(,[
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#ifdef __NeXT__
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return 0;
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#else
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fail
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#endif
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],
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CC="$CC -posix"
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AC_DEFINE(HAVE_SIGACTION)
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AC_MSG_RESULT([yes]),
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AC_MSG_RESULT([no]))
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S48_USCORE
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S48_RDYNAMIC
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AC_SUBST(CFLAGS)
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AC_SUBST(LIBOBJS)
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AC_SUBST(LDFLAGS)
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AC_OUTPUT(Makefile)
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