define variables only in one .c file to fix multiple definition

add CFLAGS="$CLASS -fcommon" in libmemcached.spec is bad to fix
multiple definition, it only masks error messages, but define
variables only in one .c file is better choice.

Signed-off-by: liu-yinsi <liuyinsi@163.com>

libmemcached-fix-multiple-definition.patch

@@ -0,0 +1,32 @@
+--- a/clients/ms_memslap.h	2021-08-04 20:25:20.314194660 +0800
++++ b/clients/ms_memslap.h	2021-08-04 20:26:01.154700115 +0800
+@@ -117,13 +117,13 @@
+ } ms_global_t;
+ 
+ /* global structure */
+-ms_global_t ms_global;
++extern ms_global_t ms_global;
+ 
+ /* global stats information structure */
+-ms_stats_t ms_stats;
++extern ms_stats_t ms_stats;
+ 
+ /* global statistic structure */
+-ms_statistic_t ms_statistic;
++extern ms_statistic_t ms_statistic;
+ 
+ #ifdef __cplusplus
+ }
+--- a/clients/ms_sigsegv.c	2014-02-09 19:52:42.000000000 +0800
++++ b/clients/ms_sigsegv.c	2021-08-04 20:35:49.725984452 +0800
+@@ -21,6 +21,10 @@
+ #include <pthread.h>
+ 
+ #include "ms_memslap.h"
++ms_global_t ms_global;
++ms_stats_t ms_stats;
++ms_statistic_t ms_statistic;
++
+ #include "ms_setting.h"
+ 
+ /* prototypes */

libmemcached.spec

@@ -1,7 +1,7 @@
 Name:          libmemcached
 Summary:       Client library and command line tools for memcached server
 Version:       1.0.18
-Release:       18
+Release:       19
 License:       BSD
 URL:           http://libmemcached.org/
 #origin source:https://launchpad.net/libmemcached/1.0/1.0.18/+download/libmemcached-1.0.18.tar.gz
@@ -19,6 +19,7 @@ Patch0001:     libmemcached-fix-linking-with-libpthread.patch
 Patch0002:     libmemcached-build.patch
 Patch0003:     libmemcached-fix-memdump-version.patch
 Patch0004:     libmemcached-Ignore-specific-errors-from-memcached_dump.patch
+Patch0005:     libmemcached-fix-multiple-definition.patch
 
 
 %description
@@ -54,7 +55,7 @@ cp -p tests/*.{cc,h} examples/
 %configure \
    --with-memcached=%{_bindir}/memcached \
    --enable-sasl --enable-libmemcachedprotocol \
-   --enable-memaslap --enable-dtrace --disable-static CFLAGS="$CLASS -fcommon"
+   --enable-memaslap --enable-dtrace --disable-static
 
 %make_build V=1
 
@@ -100,6 +101,9 @@ make test
 %{_mandir}/man3/hashkit*
 
 %changelog
+* Web Aug 04 2021 Liu Yinsi <liuyinsi@163.com> - 1.0.18-19
+- fix multiple definition to support gcc 10
+
 * Mon Aug 02 2021 Liu Yinsi <liuyinsi@163.com> - 1.0.18-18
 - compile with -fcommon to support gcc 10