+INTEL_COMPILER=no
+
+if test "$GCC" = yes ; then
+ case "$host_os" in
+ (linux*|gnu*)
+ echo "$as_me:1865: 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 1870 "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:1887: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>&5
+ ac_status=$?
+ echo "$as_me:1890: \$? = $ac_status" >&5
+ (exit "$ac_status"); } &&
+ { ac_try='test -s "conftest.$ac_objext"'
+ { (eval echo "$as_me:1893: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:1896: \$? = $ac_status" >&5
+ (exit "$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:1907: result: $INTEL_COMPILER" >&5
+echo "${ECHO_T}$INTEL_COMPILER" >&6
+ ;;
+ esac
+fi
+
+CLANG_COMPILER=no
+
+if test "$GCC" = yes ; then
+ echo "$as_me:1916: 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"
+ 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
+
+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:1956: result: $CLANG_COMPILER" >&5
+echo "${ECHO_T}$CLANG_COMPILER" >&6
+fi
+
+CLANG_VERSION=none
+
+if test "x$CLANG_COMPILER" = "xyes" ; then
+ case "$CC" in
+ (c[1-9][0-9]|*/c[1-9][0-9])
+ { echo "$as_me:1965: WARNING: replacing broken compiler alias $CC" >&5
+echo "$as_me: WARNING: replacing broken compiler alias $CC" >&2;}
+ CFLAGS="$CFLAGS -std=`echo "$CC" | sed -e 's%.*/%%'`"
+ CC=clang
+ ;;
+ esac
+
+ echo "$as_me:1972: checking version of $CC" >&5
+echo $ECHO_N "checking version of $CC... $ECHO_C" >&6
+ CLANG_VERSION="`$CC --version 2>/dev/null | sed -e '2,$d' -e 's/^.*(CLANG[^)]*) //' -e 's/^.*(Debian[^)]*) //' -e 's/^[^0-9.]*//' -e 's/[^0-9.].*//'`"
+ test -z "$CLANG_VERSION" && CLANG_VERSION=unknown
+ echo "$as_me:1976: result: $CLANG_VERSION" >&5
+echo "${ECHO_T}$CLANG_VERSION" >&6
+
+ for cf_clang_opt in \
+ -Qunused-arguments \
+ -Wno-error=implicit-function-declaration
+ do
+ echo "$as_me:1983: checking if option $cf_clang_opt works" >&5
+echo $ECHO_N "checking if option $cf_clang_opt works... $ECHO_C" >&6
+ cf_save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS $cf_clang_opt"
+ cat >"conftest.$ac_ext" <<_ACEOF
+#line 1988 "configure"
+#include "confdefs.h"
+
+ #include <stdio.h>
+int
+main (void)
+{
+
+ printf("hello!\\n");
+ ;
+ return 0;
+}
+_ACEOF
+rm -f "conftest.$ac_objext" "conftest$ac_exeext"
+if { (eval echo "$as_me:2002: \"$ac_link\"") >&5
+ (eval $ac_link) 2>&5
+ ac_status=$?
+ echo "$as_me:2005: \$? = $ac_status" >&5
+ (exit "$ac_status"); } &&
+ { ac_try='test -s "conftest$ac_exeext"'
+ { (eval echo "$as_me:2008: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:2011: \$? = $ac_status" >&5
+ (exit "$ac_status"); }; }; then
+
+ cf_clang_optok=yes
+else
+ echo "$as_me: failed program was:" >&5
+cat "conftest.$ac_ext" >&5
+
+ cf_clang_optok=no
+fi
+rm -f "conftest.$ac_objext" "conftest$ac_exeext" "conftest.$ac_ext"
+ echo "$as_me:2022: result: $cf_clang_optok" >&5
+echo "${ECHO_T}$cf_clang_optok" >&6
+ CFLAGS="$cf_save_CFLAGS"
+ if test "$cf_clang_optok" = yes; then
+ test -n "$verbose" && echo " adding option $cf_clang_opt" 1>&6
+
+echo "${as_me:-configure}:2028: testing adding option $cf_clang_opt ..." 1>&5
+
+ test -n "$CFLAGS" && CFLAGS="$CFLAGS "
+ CFLAGS="${CFLAGS}$cf_clang_opt"
+
+ fi
+ done
+fi
+
+echo "$as_me:2037: checking for $CC option to accept ANSI C" >&5