add --with-system-libltdl

configure.ac

@@ -100,6 +100,22 @@ AM_MISSING_PROG(AUTOM4TE, autom4te, $missing_dir)
 dnl 
 dnl ------------------------------ SUBDIRS --------------------
 
+AC_ARG_WITH(system-libltdl,
+[  --with-system-libltdl[=PATH]  use system libltdl.la (search in PATH if given)],
+[], [with_system_libltdl=no])
+
+if test $with_system_libltdl = no; then
+  AC_LIBOBJ(ltdl)
+  AC_CONFIG_LINKS([lib-src/ltdl.h:lib-src/ltdl_.h])
+  INCLTDL= LIBLTDL=
+elif test $with_system_libltdl = yes; then
+  INCLTDL= LIBLTDL=-lltdl
+else
+  INCLTDL="-I$withval/../include" LIBLTDL="-L$withval -lltdl"
+fi
+AC_SUBST(INCLTDL)
+AC_SUBST(LIBLTDL)
+
 AC_ARG_WITH(system-libffi,
 [  --with-system-libffi[=PATH]   use system libffi.la (search in PATH if given)],
 [], [with_system_libffi=no])

lib-src/Makefile.am

@@ -6,12 +6,12 @@ library_la_DEPENDENCIES =  @LTLIBOBJS@ @LTALLOCA@
 # These are to be included *always*, the rest are driven by configure.in
 library_la_SOURCES = \
        qsort.c getopt.c getopt1.c md5.c avltrees.c rbtrees.c lock.c \
-       strspell.c ltdl.c regex.c socketx.c pointer-set.c
+       strspell.c regex.c socketx.c pointer-set.c
 
 noinst_HEADERS = \
        obstack.h poll_.h getopt.h md5.h ansidecl.h strspell.h lock.h \
        mathl.h trigl.h avltrees.h rbtrees.h trigl.c sincosl.c getaddrinfo.h \
-       socketx.h ltdl.h regex.h pointer-set.h
+       socketx.h ltdl_.h regex.h pointer-set.h
 
-DISTCLEANFILES = poll.h
+DISTCLEANFILES = poll.h ltdl.h
 

libgst/Makefile.am

@@ -5,7 +5,7 @@ AM_LFLAGS = -Cfe -o$(LEX_OUTPUT_ROOT).c
 AM_YFLAGS = -vy
 AM_CPPFLAGS = $(RELOC_CPPFLAGS) \
   -I$(top_srcdir)/lib-src -I$(top_builddir)/lib-src \
-  $(INCFFI) $(INCLIGHTNING) $(INCSNPRINTFV) $(INCSIGSEGV)
+  $(INCFFI) $(INCLIGHTNING) $(INCSNPRINTFV) $(INCSIGSEGV) $(INCLTDL)
 
 if !HAVE_INSTALLED_LIGHTNING
 AM_CPPFLAGS += -I$(top_srcdir)/lightning -I$(top_builddir)/lightning \
@@ -21,8 +21,8 @@ CLEANFILES = genprims$(EXEEXT) genbc$(EXEEXT) genvm$(EXEEXT) \
 # definitions for libgst.la
 
 libgst_la_LIBADD=$(top_builddir)/lib-src/library.la $(SOCKET_LIBS) \
-	$(LIBSIGSEGV) $(LIBFFI) $(LIBSNPRINTFV) $(LIBREADLINE) $(LIBGMP) \
-	$(LIBTHREAD)
+	$(LIBSIGSEGV) $(LIBFFI) $(LIBSNPRINTFV) $(LIBREADLINE) $(LIBLTDL) \
+	$(LIBGMP) $(LIBTHREAD)
 
 libgst_la_DEPENDENCIES=$(top_builddir)/lib-src/library.la $(LIBSNPRINTFV)