[gjs] check for C++ compiler in configure and define CXXFLAGS warnings

[Havoc Pennington <hp src gnome org>]

commit 817919c2f60aa46209d88e92a2fae060e4d3b540
Author: Havoc Pennington <hp pobox com>
Date:   Sun Jan 3 11:45:19 2010 -0500

    check for C++ compiler in configure and define CXXFLAGS warnings

 configure.ac |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 56141c7..3cca6cc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -18,6 +18,7 @@ PKG_PROG_PKG_CONFIG
 
 AC_PROG_CC
 AM_PROG_CC_C_O
+AC_PROG_CXX
 AC_ISC_POSIX
 AC_HEADER_STDC
 
@@ -51,6 +52,7 @@ if test "$GCC" = "yes"; then
         -Wsign-compare  -Wfloat-equal;
     do
         CFLAGS="`ensureflag $flag $CFLAGS`"
+        CXXFLAGS="`ensureflag $flag $CXXFLAGS`"
     done
 fi
 
@@ -72,6 +74,7 @@ if test x$enable_coverage = xyes; then
     fi
 
     CFLAGS="$CFLAGS -g -O0 -fprofile-arcs -ftest-coverage"
+    CXXFLAGS="$CXXFLAGS -g -O0 -fprofile-arcs -ftest-coverage"
 fi
 AM_CONDITIONAL([ENABLE_COVERAGE], [test x$enable_coverage = xyes])