Fix VPATH build

ext/mbstring/config.m4

@@ -6,6 +6,10 @@ AC_DEFUN([PHP_MBSTRING_ADD_SOURCES], [
   PHP_MBSTRING_SOURCES="$PHP_MBSTRING_SOURCES $1"
 ])
 
+AC_DEFUN([PHP_MBSTRING_ADD_BASE_SOURCES], [
+  PHP_MBSTRING_BASE_SOURCES="$PHP_MBSTRING_BASE_SOURCES $1"
+])
+
 AC_DEFUN([PHP_MBSTRING_ADD_BUILD_DIR], [
   PHP_MBSTRING_EXTRA_BUILD_DIRS="$PHP_MBSTRING_EXTRA_BUILD_DIRS $1"
 ])
@@ -26,17 +30,20 @@ AC_DEFUN([PHP_MBSTRING_EXTENSION], [
   PHP_NEW_EXTENSION(mbstring, $PHP_MBSTRING_SOURCES, $ext_shared,, $PHP_MBSTRING_CFLAGS)
   PHP_SUBST(MBSTRING_SHARED_LIBADD)
 
+  for dir in $PHP_MBSTRING_EXTRA_BUILD_DIRS; do
+    PHP_ADD_BUILD_DIR([$ext_builddir/$dir], 1)
+  done
+  
   for dir in $PHP_MBSTRING_EXTRA_INCLUDES; do
     PHP_ADD_INCLUDE([$ext_srcdir/$dir])
+    PHP_ADD_INCLUDE([$ext_builddir/$dir])
   done
 
-  for dir in $PHP_MBSTRING_EXTRA_BUILD_DIRS; do
-    PHP_ADD_BUILD_DIR([$ext_builddir/$dir])
-  done
-  
   if test "$ext_shared" = "no"; then
+    PHP_ADD_SOURCES(PHP_EXT_DIR(mbstring), $PHP_MBSTRING_BASE_SOURCES)
     out="php_config.h"
   else
+    PHP_ADD_SOURCES_X(PHP_EXT_DIR(mbstring),$PHP_MBSTRING_BASE_SOURCES,,shared_objects_mbstring,yes)
     if test -f "$ext_builddir/config.h.in"; then
       out="$abs_builddir/config.h"
     else
@@ -45,11 +52,10 @@ AC_DEFUN([PHP_MBSTRING_EXTENSION], [
   fi
   
   for cfg in $PHP_MBSTRING_EXTRA_CONFIG_HEADERS; do
-    cat > $ext_srcdir/$cfg <<EOF
+    cat > $ext_builddir/$cfg <<EOF
 #include "$out"
 EOF
   done
-
 ])
 
 AC_DEFUN([PHP_MBSTRING_SETUP_MBREGEX], [
@@ -88,8 +94,8 @@ int main() { return foo(10, "", 3.14); }
     PHP_MBSTRING_ADD_INCLUDE([oniguruma])
     PHP_MBSTRING_ADD_CONFIG_HEADER([oniguruma/config.h])
 
+    PHP_MBSTRING_ADD_BASE_SOURCES([php_mbregex.c])
     PHP_MBSTRING_ADD_SOURCES([
-      php_mbregex.c
       oniguruma/regcomp.c
       oniguruma/regerror.c
       oniguruma/regexec.c
@@ -252,19 +258,19 @@ dnl Main config
 dnl
 
 PHP_ARG_ENABLE(mbstring, whether to enable multibyte string support,
-[  --enable-mbstring       Enable multibyte string support.])
+[  --enable-mbstring       Enable multibyte string support])
 
 PHP_ARG_ENABLE([mbregex], [whether to enable multibyte regex support],
-[  --disable-mbregex         MBSTRING: Disable multibyte regex support.], yes, no)
+[  --disable-mbregex         MBSTRING: Disable multibyte regex support], yes, no)
 
 PHP_ARG_WITH(libmbfl, [for external libmbfl],
 [  --with-libmbfl[=DIR]      MBSTRING: Use external libmbfl. DIR is the libmbfl install prefix.
-                            If DIR is not set, the bundled libmbfl will be used.], no, no)
+                            If DIR is not set, the bundled libmbfl will be used], no, no)
 
 if test "$PHP_MBSTRING" != "no"; then  
   AC_DEFINE([HAVE_MBSTRING],1,[whether to have multibyte string support])
 
-  PHP_MBSTRING_ADD_SOURCES([mbstring.c php_unicode.c mb_gpc.c])
+  PHP_MBSTRING_ADD_BASE_SOURCES([mbstring.c php_unicode.c mb_gpc.c])
 
   if test "$PHP_MBREGEX" != "no"; then
     PHP_MBSTRING_SETUP_MBREGEX