dnl Usage:
dnl DC_TEST_SHOBJFLAGS(shobjflags, shobjldflags, action-if-not-found)
dnl
AC_DEFUN(DC_TEST_SHOBJFLAGS, [
AC_SUBST(SHOBJFLAGS)
AC_SUBST(SHOBJLDFLAGS)
OLD_LDFLAGS="$LDFLAGS"
SHOBJFLAGS=""
LDFLAGS="$OLD_LDFLAGS $1 $2"
AC_TRY_LINK([#include <stdio.h>
int unrestst(void);], [ printf("okay\n"); unrestst(); return(0); ], [ SHOBJFLAGS="$1"; SHOBJLDFLAGS="$2" ], [
LDFLAGS="$OLD_LDFLAGS"
$3
])
LDFLAGS="$OLD_LDFLAGS"
])
AC_DEFUN(DC_GET_SHOBJFLAGS, [
AC_SUBST(SHOBJFLAGS)
AC_SUBST(SHOBJLDFLAGS)
AC_MSG_CHECKING(how to create shared objects)
if test -z "$SHOBJFLAGS" -a -z "$SHOBJLDFLAGS"; then
DC_TEST_SHOBJFLAGS([-fPIC -DPIC], [-shared -rdynamic], [
DC_TEST_SHOBJFLAGS([-fPIC -DPIC], [-shared], [
DC_TEST_SHOBJFLAGS([-fPIC -DPIC], [-shared -rdynamic -mimpure-text], [
DC_TEST_SHOBJFLAGS([-fPIC -DPIC], [-shared -mimpure-text], [
DC_TEST_SHOBJFLAGS([-fPIC -DPIC], [-shared -rdynamic -Wl,-G,-z,textoff], [
DC_TEST_SHOBJFLAGS([-fPIC -DPIC], [-shared -Wl,-G,-z,textoff], [
DC_TEST_SHOBJFLAGS([-fPIC -DPIC], [-shared -dynamiclib -flat_namespace -undefined suppress -bind_at_load], [
DC_TEST_SHOBJFLAGS([-fPIC -DPIC], [-dynamiclib -flat_namespace -undefined suppress -bind_at_load], [
DC_TEST_SHOBJFLAGS([-fPIC -DPIC], [-Wl,-dynamiclib -Wl,-flat_namespace -Wl,-undefined,suppress -Wl,-bind_at_load], [
DC_TEST_SHOBJFLAGS([-fPIC -DPIC], [-dynamiclib -flat_namespace -undefined suppress], [
DC_TEST_SHOBJFLAGS([-fPIC -DPIC], [-dynamiclib], [
AC_MSG_RESULT(cant)
AC_MSG_ERROR([We are unable to make shared objects.])
])
])
])
])
])
])
])
])
])
])
])
fi
AC_MSG_RESULT($SHOBJLDFLAGS $SHOBJFLAGS)
])
AC_DEFUN(DC_CHK_OS_INFO, [
AC_CANONICAL_HOST
AC_SUBST(SHOBJEXT)
AC_SUBST(AREXT)
AC_SUBST(SHOBJFLAGS)
AC_SUBST(SHOBJLDFLAGS)
AC_MSG_CHECKING(host operating system)
AC_MSG_RESULT($host_os)
SHOBJEXT="so"
AREXT="a"
case $host_os in
darwin*)
SHOBJEXT="dylib"
;;
hpux*)
SHOBJEXT="sl"
;;
mingw*)
SHOBJEXT="dll"
SHOBJFLAGS="-mms-bitfields -DPIC"
SHOBJLDFLAGS='-shared -Wl,--dll -Wl,--enable-auto-image-base -Wl,--output-def,$[@].def,--out-implib,$[@].a'
;;
esac
])