Force to use signed chars

1 files changed, 29 insertions, 2 deletions

diff --git a/configure b/configure
index a8ca071cb..9341c504a 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.ac 2b51b41ab.
+# From configure.ac 6d5542195.
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.69.
 #
@@ -6460,7 +6460,6 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 
 
 
-
 		{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -fsanitize=pointer-compare" >&5
 $as_echo_n "checking whether $CC supports -fsanitize=pointer-compare... " >&6; }
 		OLD_CFLAGS="$CFLAGS"
@@ -6708,6 +6707,34 @@ fi
 
 
 
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -fsigned-char" >&5
+$as_echo_n "checking whether $CC supports -fsigned-char... " >&6; }
+		OLD_CFLAGS="$CFLAGS"
+		CFLAGS="$CFLAGS -fsigned-char"
+		OLD_LDFLAGS="$LDFLAGS"
+		LDFLAGS="$LDFLAGS -fsigned-char"
+		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+int foo;
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+				{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+
+else
+
+				{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+				CFLAGS="$OLD_CFLAGS"
+				LDFLAGS="$OLD_LDFLAGS"
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
+
+
+
 		{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -Wno-unused-parameter" >&5
 $as_echo_n "checking whether $CC supports -Wno-unused-parameter... " >&6; }
 		OLD_CFLAGS="$CFLAGS"