first changes towards dynamic loading in Darwin

git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@450 b08c6af1-5177-4d33-ba66-4b1c6b8b522a

H/Foreign.h

@@ -107,6 +107,15 @@
 #define LOAD_SHL 1
 #endif
 
+#if defined(__MACH__) && defined(__APPLE__)
+#ifdef NO_DYN
+#undef NO_DYN
+#endif
+#ifndef LOAD_DL
+#define LOAD_DL 1
+#endif
+#endif
+
 extern char YapExecutable[];
 
 extern char LoadMsg[];

config.h.in

@@ -49,6 +49,7 @@
 #undef  HAVE_CTYPE_H
 #undef  HAVE_DIRECT_H
 #undef  HAVE_DIRENT_H
+#undef  HAVE_DLFCN_H
 #undef  HAVE_ERRNO_H
 #undef  HAVE_FCNTL_H
 #undef  HAVE_FENV_H

configure.in

@@ -452,6 +452,13 @@ case $target_os in
 	SHLIB_LD="ld -n32 -shared -rdata_shared"
 	INSTALL_DLLS=""
 	;;
+      *darwin*)
+	SHLIB_CFLAGS="-fno-common"
+	SHLIB_SUFFIX=".so"
+        DO_SECOND_LD=""
+	SHLIB_LD="cc -bundle -flat_namespace -undefined suppress"
+	INSTALL_DLLS=""
+	;;
       *netbsd*|*freebsd*)
 	if echo __ELF__ | ${CC:-cc} -E - | grep -q __ELF__
         then
@@ -548,7 +555,8 @@ esac
 dnl Checks for header files.
 AC_HEADER_STDC
 AC_HEADER_SYS_WAIT
-AC_CHECK_HEADERS(arpa/inet.h ctype.h direct.h dirent.h errno.h fcntl.h)
+AC_CHECK_HEADERS(arpa/inet.h ctype.h direct.h dirent.h dlfcn.h)
+AC_CHECK_HEADERS(errno.h fcntl.h)
 AC_CHECK_HEADERS(fenv.h fpu_control.h ieeefp.h io.h limits.h memory.h)
 AC_CHECK_HEADERS(netdb.h netinet/in.h regex.h)
 AC_CHECK_HEADERS(siginfo.h signal.h stdarg.h string.h stropts.h)