First cut at standard way of making dynamically loadable extensions on UNIX.

Examples on how to test:

 ./configure --with-xml              static
 ./configure --with-xml=/opt         static
 ./configure --with-xml=shared       shared
 ./configure --with-xml=shared,/opt  shared

The difference between these two is that when the extension is shared, it
is not merged into libphpext.a.  The shared extension is currently always
built.  I can't find a way to do just one or the other with automake/libtool,
if someone has a clever idea, please come forward. :-)

"make install" installs the .so (as well as a lot of other cruft) in
$prefix/lib/php.

Author: stigsb

Makefile.in

@@ -65,6 +65,7 @@ APXS_LDFLAGS = $(EXTRA_LIBS) $(LIBS)
 APXS_EXP = @APXS_EXP@
 WARNING_LEVEL = @WARNING_LEVEL@
 LEX_CFLAGS = -w$(WARNING_LEVEL) @LEX_CFLAGS@
+EXT_SHARED = @EXT_SHARED@
 
 SOURCE = main.c internal_functions.c snprintf.c php3_sprintf.c \
        configuration-parser.c configuration-scanner.c request_info.c \
@@ -170,7 +171,6 @@ distdir:
 	flex -Pcfg -oconfiguration-scanner.c -i configuration-scanner.l ;\
 	bison -p cfg -v -d configuration-parser.y -o configuration-parser.c
 	find $(distdir) -name CVS -o -name .cvsignore | xargs rm -rf
-	
 
 maintainer-clean-depend: maintainer-clean-depend-recursive
 
@@ -203,9 +203,16 @@ php_config.h.in: @MAINT@ stamp-h.in
 stamp-h.in: configure.in aclocal.m4 acconfig.h
 	cd ${srcdir} && autoheader && touch ${srcdir}/stamp-h.in
 
-install: $(BINNAME)
+install: install-recursive $(BINNAME)
 	$(INSTALL_IT)
 
+install-recursive:
+	if test "$(EXT_SHARED)" != ""; then \
+		for dir in $(EXT_SHARED); do \
+			test -d ext/$$dir && (cd ext/$$dir; $(MAKE) install); \
+		done; \
+	fi
+
 indent:	clean
 	indent -v -kr -cli4 -ts4 \
 	-T pval -T HashTable -T Bucket -T Token -T TokenCache -T TokenCacheManager \

acinclude.m4

@@ -138,15 +138,22 @@ dnl to make dynamic libraries as well.
 dnl
 AC_DEFUN(PHP_EXTENSION,[
   EXT_SUBDIRS="$EXT_SUBDIRS $1"
-  _extlib="libphpext_$1.a"
-  EXT_LIBS="$EXT_LIBS $1/$_extlib"
-  EXTINFO_DEPS="$EXTINFO_DEPS ../ext/$1/extinfo.c.stub"
+  if test "$2" != "shared" -a "$2" != "yes"; then
+    _extlib="libphpext_$1.a"
+    EXT_LIBS="$EXT_LIBS $1/$_extlib"
+    EXTINFO_DEPS="$EXTINFO_DEPS ../ext/$1/extinfo.c.stub"
+    EXT_STATIC="$EXT_STATIC $1"
+  else
+    EXT_SHARED="$EXT_SHARED $1"
+  fi
 dnl   EXT_INCLUDE_CODE="\#include \"ext/$1/php3_$1.h\"\\n$EXT_INCLUDE_CODE"
 dnl   EXT_MODULE_PTRS="phpext_$1_ptr, $EXT_MODULE_PTRS"
 dnl "
 ])
 
 AC_SUBST(EXT_SUBDIRS)
+AC_SUBST(EXT_STATIC)
+AC_SUBST(EXT_SHARED)
 AC_SUBST(EXT_LIBS)
 AC_SUBST(EXTINFO_DEPS)
 dnl AC_SUBST(EXT_INCLUDE_CODE)