Take -DWX_PRECOMP out of GCC_PRAGMA_FLAGS and put it into its own PCH_FLAGS.

If -DNO_GCC_PRAGMA is included in GCC_PRAGMA_FLAGS (because the platform
always requires it) then it won't be duplicated in PCH_FLAGS, but if
the platform does not normally need -DNO_GCC_PRAGMA then the flag
will be included in PCH_FLAGS because PCH always requires it.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@31471 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

configure.in

@@ -6230,11 +6230,8 @@ else
 
 fi
 
+dnl Check to see if the platform always requires NO_GCC_PRAGMA
 GCC_PRAGMA_FLAGS=""
-dnl Find out if we have to define NO_GCC_PRAGMA and WX_PRECOMP:
-if test $GCC_PCH = 1 ; then
-    GCC_PRAGMA_FLAGS="-DWX_PRECOMP -DNO_GCC_PRAGMA"
-else
     case "${host}" in
         powerpc-*-darwin* )
             dnl Some Apple's GCC version are broken and can't handle the
@@ -6279,8 +6276,18 @@ else
             fi
             ;;
     esac
+
+dnl Find out if we have to define NO_GCC_PRAGMA and WX_PRECOMP:
+PCH_FLAGS=""
+if test $GCC_PCH = 1 ; then
+    if test "x$GCC_PRAGMA_FLAGS" = "x"; then
+        PCH_FLAGS="-DWX_PRECOMP -DNO_GCC_PRAGMA"
+    else
+        PCH_FLAGS="-DWX_PRECOMP"
+    fi
 fi
-CPPFLAGS="$GCC_PRAGMA_FLAGS $CPPFLAGS"
+
+CPPFLAGS="$PCH_FLAGS $GCC_PRAGMA_FLAGS $CPPFLAGS"
 
 
 dnl for convenience, sort the samples in alphabetical order