+ ac_ext=cc
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+ac_main_return=return
+
+ if test "x$cf_with_cxx" != xno
+ then
+ # Several of the C++ configurations do not work, particularly when
+ # cross-compiling (20140913 -TD)
+ echo "$as_me:2796: checking if $CXX works" >&5
+echo $ECHO_N "checking if $CXX works... $ECHO_C" >&6
+
+ save_CPPFLAGS="$CPPFLAGS"
+ eval cf_includedir=${includedir}
+ CPPFLAGS="$CPPFLAGS -I${cf_includedir}"
+
+cat >conftest.$ac_ext <<_ACEOF
+#line 2804 "configure"
+#include "confdefs.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+
+int
+main ()
+{
+
+ printf("Hello world!\n")
+
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:2821: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>&5
+ ac_status=$?
+ echo "$as_me:2824: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -s conftest.$ac_objext'
+ { (eval echo "$as_me:2827: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:2830: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ cf_cxx_works=yes
+else
+ echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+cf_cxx_works=no
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+ CPPFLAGS="$save_CPPFLAGS"
+
+ echo "$as_me:2841: result: $cf_cxx_works" >&5
+echo "${ECHO_T}$cf_cxx_works" >&6
+ if test "x$cf_cxx_works" = xno
+ then
+ { echo "$as_me:2845: WARNING: Ignore $CXX, since it cannot compile hello-world." >&5
+echo "$as_me: WARNING: Ignore $CXX, since it cannot compile hello-world." >&2;}
+ cf_with_cxx=no; CXX=""; GXX="";
+ fi
+ fi
+ ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+ac_main_return=return
+
+ # autoconf 2.5x removed the error (hardcoding it to g++, or just blank)