fix failed: gcc command not found.

opensm.spec

@@ -1,6 +1,6 @@
 Name:             opensm
 Version:          3.3.20
-Release:          11
+Release:          12
 Summary:          InfiniBand Subnet Manager and Administrator
 License:          GPLv2 or BSD
 URL:              https://www.openfabrics.org/
@@ -10,7 +10,7 @@ Source1:          opensm.logrotate
 Source2:          opensm.service
 Source3:          opensm.launch
 Source4:          opensm.rwtab
-BuildRequires:    byacc flex libibumad-devel
+BuildRequires:    gcc byacc flex libibumad-devel
 
 Requires:         logrotate rdma
 Requires(post):   systemd
@@ -110,5 +110,8 @@ rm -rf /var/cache/opensm
 %{_mandir}/man8/*8*
 
 %changelog
+* Web 02 Jun 2021 zhaoyao<zhaoyao32@huawei.com> - 3.3.20-12
+- fixs faileds: /bin/sh: gcc: command not found. 
+
 * Mon Nov 18 2019 openEuler Buildteam <buildteam@openeuler.org> - 3.3.20-10
 - Package init