+ echo $ac_n "checking for g++ that supports new system_header pragma""... $ac_c" 1>&6
+echo "configure:2103: checking for g++ that supports new system_header pragma" >&5
+
+ ac_ext=C
+# CXXFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='${CXX-g++} -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext 1>&5'
+ac_link='${CXX-g++} -o conftest${ac_exeext} $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&5'
+cross_compiling=$ac_cv_prog_cxx_cross
+
+ # the CXXFLAGS thing is suspicious, but based on similar
+ # bits in GLIBCPP_CONFIGURE
+ ac_test_CXXFLAGS="${CXXFLAGS+set}"
+ ac_save_CXXFLAGS="$CXXFLAGS"
+ CXXFLAGS='-Wunknown-pragmas -Werror'
+ cat > conftest.$ac_ext <<EOF
+#line 2118 "configure"
+#include "confdefs.h"
+#pragma system_header
+int main() {
+int foo;
+
+; return 0; }
+EOF
+if { (eval echo configure:2126: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+ rm -rf conftest*
+ WERROR='-Werror'
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ WERROR=''
+fi
+rm -f conftest*
+ if test "$ac_test_CXXFLAGS" = set; then
+ CXXFLAGS="$ac_save_CXXFLAGS"
+ else
+ # this is the suspicious part
+ CXXFLAGS=''
+ fi
+ ac_ext=c
+# CFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='${CC-cc} -c $CFLAGS $CPPFLAGS conftest.$ac_ext 1>&5'
+ac_link='${CC-cc} -o conftest${ac_exeext} $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&5'
+cross_compiling=$ac_cv_prog_cc_cross
+
+ if test "$WERROR" = ""; then
+ echo "$ac_t""no" 1>&6
+ else
+ echo "$ac_t""yes" 1>&6
+ fi
+