1 files changed, 48 insertions, 0 deletions
diff --git a/m4/msnative-struct.m4 b/m4/msnative-struct.m4
new file mode 100644
index 0000000..84d773e
--- /dev/null
+++ b/m4/msnative-struct.m4
@@ -0,0 +1,48 @@
+#############################################################
+# when compiling on Win32 we have to add the option
+# -fnative-struct for gcc2 or
+# --mms-bitfields for gcc3
+# parts from glib configure.in
+
+dnl AC_GCC_MSNATIVE_STRUCT
+dnl test if gcc supports option for MSnative struct
+dnl
+AC_DEFUN(AC_GCC_MSNATIVE_STRUCT,
+[dnl
+dnl Add ms native struct gcc option to CFLAGS if available
+dnl
+dnl  if test x"$glib_native_win32" = xyes; then
+ AC_CHECK_HEADERS(windows.h,
+ [
+    if test x"$GCC" = xyes; then
+      msnative_struct=''
+      AC_MSG_CHECKING([how to get MSVC-compatible struct packing])
+      if test -z "$ac_cv_prog_CC"; then
+        our_gcc="$CC"
+      else
+        our_gcc="$ac_cv_prog_CC"
+      fi
+      case `$our_gcc --version | sed -e 's,\..*,.,' -e q` in
+        2.)
+          if $our_gcc -v --help 2>/dev/null | grep fnative-struct >/dev/null; then
+            msnative_struct='-fnative-struct'
+          fi
+          ;;
+        *)
+         if $our_gcc -v --help 2>/dev/null | grep ms-bitfields >/dev/null; then
+           msnative_struct='-mms-bitfields'
+         fi
+         ;;
+      esac
+      if test x"$msnative_struct" = x ; then
+        AC_MSG_RESULT([no way])
+        AC_MSG_WARN([produced libraries might be incompatible with MSVC-compiled code])
+      else
+        CFLAGS="$CFLAGS $msnative_struct"
+        AC_MSG_RESULT([${msnative_struct}])
+      fi
+    fi
+dnl  fi
+ ])
+])
+