support clang build

Signed-off-by: luofeng14 <luofeng13@huawei.com>

zip-fix-cc.patch

@@ -0,0 +1,11 @@
+--- a/unix/Makefile	2008-05-07 14:33:56.000000000 +0800
++++ b/unix/Makefile	2023-04-16 16:14:10.611625606 +0800
+@@ -22,7 +22,7 @@
+ LN = ln -s
+ 
+ # (to use the GNU compiler, change cc to gcc in CC)
+-CC = cc
++CC ?= cc
+ BIND = $(CC)
+ AS = $(CC) -c
+ CPP = /lib/cpp

zip.spec

@@ -1,6 +1,6 @@
 Name:            zip
 Version:         3.0
-Release:         30
+Release:         31
 Summary:         A compression and file packaging/archive utility
 License:         Info-ZIP
 URL:             http://www.info-zip.org/Zip.html
@@ -13,6 +13,7 @@ Patch3:          zip-3.0-time.patch
 Patch4:          man.patch
 Patch5:          zip-3.0-format-security.patch
 Patch6:          zipnote.patch
+Patch7:          zip-fix-cc.patch
 
 Patch6000:       CVE-2018-13410.patch
 
@@ -37,7 +38,7 @@ This package contains the documents and manuals related to zip.
 %autosetup -n zip30 -p1
 
 %build
-%make_build -f unix/Makefile prefix=%{_prefix} "CFLAGS_NOOPT=-I. -DUNIX $RPM_OPT_FLAGS" generic_gcc
+%make_build -f unix/Makefile prefix=%{_prefix} "CFLAGS_NOOPT=-I. -DUNIX $RPM_OPT_FLAGS" generic
 
 %install
 mkdir -p %{buildroot}%{_bindir}
@@ -55,6 +56,9 @@ mkdir -p %{buildroot}%{_mandir}/man1
 %{_mandir}/man1/zip*
 
 %changelog
+* Fri Nov 10 2023 luofeng <luofeng13@huawei.com> - 3.0-31
+- support clang build
+
 * Fri May 27 2022 konglidong <konglidong@uniontech.com> - 3.0-30
 - modify bad date in %changelog