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dnl Initialize the hell package.
AC_INIT(ltdl.c)
AM_INIT_AUTOMAKE(libltdl,1.0)
AC_PROG_CC
AM_PROG_LIBTOOL
AC_HEADER_STDC
AC_CHECK_HEADERS(malloc.h dlfcn.h dl.h)
AC_CHECK_FUNCS(strdup)
LIBADD_DL=
AC_CHECK_FUNCS(dlopen, AC_DEFINE(HAVE_LIBDL),
[AC_CHECK_LIB(dl, dlopen, [AC_DEFINE(HAVE_LIBDL) LIBADD_DL="-ldl"],
[AC_CHECK_LIB(dld, dld_link, [AC_DEFINE(HAVE_DLD) LIBADD_DL="-ldld"],
[AC_CHECK_FUNCS(shl_load, AC_DEFINE(HAVE_SHL_LOAD) )]
)]
)]
)
AC_SUBST(LIBADD_DL)
AC_MSG_CHECKING(for underscore before symbols)
AC_CACHE_VAL(libltdl_cv_uscore,[
echo "main(){int i=1;} fnord(){int i=23; int ltuae=42;}" > conftest.c
${CC} conftest.c > /dev/null
if (nm a.out | grep _fnord) > /dev/null; then
libltdl_cv_uscore=yes
else
libltdl_cv_uscore=no
fi])
AC_MSG_RESULT($libltdl_cv_uscore)
rm -f conftest.c a.out
if test $libltdl_cv_uscore = yes; then
if test $ac_cv_func_dlopen = yes -o $ac_cv_lib_dl_dlopen = yes ; then
AC_MSG_CHECKING(whether we have to add an underscore for dlsym)
AC_CACHE_VAL(libltdl_cv_need_uscore,AC_TRY_RUN([
#include <dlfcn.h>
#include <stdio.h>
fnord() { int i=42;}
main() { void *self, *ptr1, *ptr2; self=dlopen(NULL,RTLD_LAZY);
if(self) { ptr1=dlsym(self,"fnord"); ptr2=dlsym(self,"_fnord");
if(ptr1 && !ptr2) exit(0); } exit(1); }
], libltdl_cv_need_uscore=no,
[libltdl_cv_need_uscore=yes AC_DEFINE(NEED_USCORE)],
libltdl_cv_need_uscore=no))
AC_MSG_RESULT($libltdl_cv_need_uscore)
fi
fi
dnl Output the makefile
AC_OUTPUT(Makefile)
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