[gjs] Drop incorrect CXXFLAGS

[Colin Walters <walters src gnome org>]

commit 036873137f675c7785cbd76689b067fb0ab058a2
Author: Marc-Antoine Perennou <Marc-Antoine Perennou com>
Date:   Fri Mar 4 17:25:52 2011 +0100

    Drop incorrect CXXFLAGS
    
    -Wmissing-prototypes and -Wnested-externs are not supported in CXXFLAGS
    
    https://bugzilla.gnome.org/show_bug.cgi?id=643325

 configure.ac |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 96c907b..0f2769b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -49,12 +49,13 @@ changequote([,])dnl
 
 if test "$GCC" = "yes"; then
     for flag in -Wall -Wchar-subscripts -Wmissing-declarations \
-        -Wmissing-prototypes -Wnested-externs -Wpointer-arith -Wcast-align \
-        -Wsign-compare;
+        -Wpointer-arith -Wcast-align -Wsign-compare;
     do
         CFLAGS="`ensureflag $flag $CFLAGS`"
         CXXFLAGS="`ensureflag $flag $CXXFLAGS`"
     done
+    CFLAGS="`ensureflag -Wmissing-prototypes $CFLAGS`"
+    CFLAGS="`ensureflag -Wnested-externs $CFLAGS`"
 fi
 
 # coverage