!7 add -fsign-char for aarch64 for test-localeconv

From: @zou_lin77
Reviewed-by: @overweight
Signed-off-by: @overweight

diffutils.spec

@@ -1,6 +1,6 @@
 Name: diffutils
 Version: 3.7
-Release: 3
+Release: 4
 Summary: A GNU collection of diff utilities
 URL: http://www.gnu.org/software/diffutils/diffutils.html
 Source: ftp://ftp.gnu.org/gnu/diffutils/diffutils-%{version}.tar.xz
@@ -26,6 +26,9 @@ GNU Diffutils is a package of several programs related to finding differences be
 autoreconf -ifv
 
 %build
+%ifarch aarch64
+CFLAGS="$RPM_OPT_FLAGS -fsigned-char"
+%endif
 %configure
 make PR_PROGRAM=%{_bindir}/pr
 
@@ -51,6 +54,12 @@ cat tests/test-suite.log
 %exclude %{_infodir}/dir
 
 %changelog
+* Wed Mar 24 2021 zoulin<zoulin13@huawei.com> 3.7-4
+- Type:enhancement
+- ID:NA
+- SUG:NA
+- DESC:add -fsign-char for aarch64 for test-localeconv
+
 * Mon Nov 11 2019 shenyangyang<shenyangyang4@huawei.com> 3.7-3
 - Type:enhancement
 - ID:NA