!20 修复由于gcc升级导致编译失败。

From: @liheavy
Reviewed-by: @small_leek
Signed-off-by: @small_leek

texlive-base.spec

@@ -4,7 +4,7 @@
 
 Name:           texlive-base
 Version:        20180414
-Release:        30
+Release:        31
 Epoch:          7
 Summary:        TeX formatting system
 License:        ASL 2.0 and LGPL-2.1-only and Zlib and OFL-1.1 and Public Domain and LGPL-2.0-only and GPLv2+ and MPL-1.1 and Libpng and LGPL-3.0-only and BSL-1.0 and GPLv2 and GPLv3 and CPL-1.0 and IJG and MIT and LPPL-1.3c and ICU and psutils
@@ -5850,8 +5850,8 @@ done
 %global mysources %{lua: for index,value in ipairs(sources) do if index >= 16 then print(value.." ") end end}
 
 %build
-export CFLAGS="$RPM_OPT_FLAGS -fno-strict-aliasing -Werror=format-security"
-export CXXFLAGS="$RPM_OPT_FLAGS -std=c++11 -fno-strict-aliasing -Werror=format-security"
+export CFLAGS="$RPM_OPT_FLAGS -fno-strict-aliasing -Werror=format-security -fcommon"
+export CXXFLAGS="$RPM_OPT_FLAGS -std=c++11 -fno-strict-aliasing -Werror=format-security -fcommon"
 export LDFLAGS="%{build_ldflags}"
 cd source
 PREF=`pwd`/inst
@@ -8096,6 +8096,9 @@ done <<< "$list"
 %doc %{_datadir}/texlive/texmf-dist/doc/latex/yplan/
 
 %changelog
+* Sat Jul 31 2021 Haiwei Li <lihaiwei8@huawei.com> - 20180414-31
+- Fix compilation failed due to multiple definition
+
 * Wed 30 Jun 2021 sunguoshuai <sunguoshuai@huawei.com> - 20180414-30
 - Fix build error when srctopdf is ok