!9 LLVM平行宇宙：支持使用clang构建telnet

From: @ren-yi43 
Reviewed-by: @sunsuwan 
Signed-off-by: @sunsuwan

telnet.spec

@@ -1,7 +1,7 @@
 Name:             telnet
 Epoch:            1
 Version:          0.17
-Release:          78
+Release:          79
 Summary:          Client and Server programs for the Telnet communication protocol
 License:          BSD
 Url:              http://web.archive.org/web/20070819111735/www.hcs.harvard.edu/~dholland/computers/old-netkit.html
@@ -63,11 +63,11 @@ mv -f telnet telnet-NETKIT
 %autosetup -T -D -a 1 -n netkit-telnet-%{version} -p1
 
 %build
-%{_configure} --with-c-compiler=gcc --prefix=%{_prefix} --exec-prefix=%{_exec_prefix}
+%{_configure} --with-c-compiler=%{__cc} --prefix=%{_prefix} --exec-prefix=%{_exec_prefix}
 sed -i 's,-O2,\$(CC_FLAGS),;s,LDFLAGS=.*,LDFLAGS=\$(LD_FLAGS),;s,^MANDIR=.*$,MANDIR=%{_mandir},' MCONFIG
 sed -i 's,install [+-]s,install,g' ./telnet/GNUmakefile ./telnetd/Makefile ./telnetlogin/Makefile ./telnet-NETKIT/Makefile
 
-%make_build CC_FLAGS="$RPM_OPT_FLAGS -fpie" LD_FLAGS="$LD_FLAGS -z now -pie"
+%make_build CC_FLAGS="$RPM_OPT_FLAGS -fpie -Wno-error=int-conversion" LD_FLAGS="$LD_FLAGS -z now -pie"
 
 %install
 install -d %{buildroot}{%{_bindir},%{_sbindir},%{_mandir}/man{1,5,8}}
@@ -100,6 +100,12 @@ install -pm644 %{SOURCE3} %{buildroot}%{_unitdir}/telnet.socket
 %{_mandir}/man1/telnet.1*
 
 %changelog
+* Wed Aug 30 2023 renyi <977713017@qq.com> - 1:0.17-79
+- Type:Feature
+- ID:NA
+- SUG:NA
+- DESC:add clang compile support
+
 * Tue Dec 15 2020 xihaochen <xihaochen@huawei.com> - 1:0.17-78
 - Type:requirement
 - ID:NA