!36 add loongarch support.

From: @huajingyun 
Reviewed-by: @ziyangc 
Signed-off-by: @ziyangc

tcl.spec

@@ -2,7 +2,7 @@
 
 Name:          tcl
 Version:       8.6.12
-Release:       1
+Release:       2
 Epoch:         1
 Summary:       The Tool Command Language implementation
 License:       BSD
@@ -53,7 +53,11 @@ The development files for tcl.
 cd unix
 autoconf
 %configure --enable-threads --enable-symbols --enable-shared --enable-dtrace
+%ifnarch loongarch64
 %make_build CFLAGS="%{optflags}" TCL_LIBRARY=%{_datadir}/%{name}%{MAJOR}
+%else
+%make_build CFLAGS="-Wl,--whole-archive -lpthread -Wl,--no-whole-archive" TCL_LIBRARY=%{_datadir}/%{name}%{MAJOR}
+%endif
 
 %install
 cd unix
@@ -122,6 +126,9 @@ make test
 %{_mandir}/mann/*
 
 %changelog
+* Tue Nov 15 2022 huajingyun <huajingyun@loongson.cn> - 1:8.6.12-2
+- add build flags for weak symbols on loongarch64
+
 * Thu Apr 21 2022 zoulin <zoulin13@h-partners.com> - 1:8.6.12-1
 - Type:enhancement
 - ID:NA