BUG: Check if the compiler is gnu. If it is, do not do special platform tests. Fixes Bug #1215 - bootstrap uses native flags with gnu compiler on OSF

bootstrap

@@ -511,6 +511,30 @@ fi
 
 # Test C++ compiler features
 
+# Are we GCC?
+
+TMPFILE=`cmake_tmp_file`
+cat > ${TMPFILE}.cxx <<EOF
+#if defined(__GNUC__) && !defined(__INTEL_COMPILER)
+#include <iostream>
+int main() { std::cout << "This is GNU" << std::endl; return 0;}
+#endif
+EOF
+cmake_cxx_compiler_is_gnu=0
+if cmake_try_run "${cmake_cxx_compiler}" \
+  "${cmake_cxx_flags}" "${TMPFILE}.cxx" >> cmake_bootstrap.log 2>&1; then
+  cmake_cxx_compiler_is_gnu=1
+fi
+if [ "x${cmake_cxx_compiler_is_gnu}" = "x1" ]; then
+  echo "${cmake_cxx_compiler} is GNU compiler"
+else
+  echo "${cmake_cxx_compiler} is not GNU compiler"
+fi
+rm -f "${TMPFILE}.cxx"
+
+if [ "x${cmake_cxx_compiler_is_gnu}" != "x1" ]; then
+  # Check for non-GNU compiler flags
+
   # If we are on IRIX, check for -LANG:std
   cmake_test_flags="-LANG:std"
   if [ "x${cmake_system}" = "xIRIX64" ]; then
@@ -614,6 +638,7 @@ EOF
     rm -f "${TMPFILE}.c"
   fi
   cmake_test_flags=
+fi
 
 # Test for kwsys features
 KWSYS_NAME_IS_KWSYS=0