+INTEL_COMPILER=no
+
+if test "$GCC" = yes ; then
+ case $host_os in
+ (linux*|gnu*)
+ echo "$as_me:1864: checking if this is really Intel C compiler" >&5
+echo $ECHO_N "checking if this is really Intel C compiler... $ECHO_C" >&6
+ cf_save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -no-gcc"
+ cat >conftest.$ac_ext <<_ACEOF
+#line 1869 "configure"
+#include "confdefs.h"
+
+int
+main (void)
+{
+
+#ifdef __INTEL_COMPILER
+#else
+make an error
+#endif
+
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:1886: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>&5
+ ac_status=$?
+ echo "$as_me:1889: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -s conftest.$ac_objext'
+ { (eval echo "$as_me:1892: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:1895: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ INTEL_COMPILER=yes
+cf_save_CFLAGS="$cf_save_CFLAGS -we147"
+
+else
+ echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+ CFLAGS="$cf_save_CFLAGS"
+ echo "$as_me:1906: result: $INTEL_COMPILER" >&5
+echo "${ECHO_T}$INTEL_COMPILER" >&6
+ ;;
+ esac
+fi
+
+CLANG_COMPILER=no
+
+if test "$GCC" = yes ; then
+ echo "$as_me:1915: checking if this is really Clang C compiler" >&5
+echo $ECHO_N "checking if this is really Clang C compiler... $ECHO_C" >&6
+ cf_save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -Qunused-arguments"
+ cat >conftest.$ac_ext <<_ACEOF
+#line 1920 "configure"
+#include "confdefs.h"
+
+int
+main (void)
+{
+
+#ifdef __clang__
+#else
+make an error
+#endif
+
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:1937: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>&5
+ ac_status=$?
+ echo "$as_me:1940: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -s conftest.$ac_objext'
+ { (eval echo "$as_me:1943: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:1946: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ CLANG_COMPILER=yes
+cf_save_CFLAGS="$cf_save_CFLAGS -Qunused-arguments"
+
+else
+ echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+ CFLAGS="$cf_save_CFLAGS"
+ echo "$as_me:1957: result: $CLANG_COMPILER" >&5
+echo "${ECHO_T}$CLANG_COMPILER" >&6
+fi
+
+echo "$as_me:1961: checking for $CC option to accept ANSI C" >&5