!10 Add riscv64 support

From: @a-xiang-and-shanhaijing 
Reviewed-by: @dillon_chen 
Signed-off-by: @dillon_chen

add-riscv-support.patch

@@ -0,0 +1,12 @@
+diff -ur tidb-4.0.14/util/sys/linux/sys_linux.go tidb-4.0.14/util/sys/linux/sys_linux.go
+--- tidb-4.0.14/util/sys/linux/sys_linux.go	2021-07-26 18:50:15.000000000 +0800
++++ tidb-4.0.14/util/sys/linux/sys_linux.go	2023-07-19 09:54:54.386949713 +0800
+@@ -27,7 +27,7 @@
+ 	if err != nil {
+ 		return
+ 	}
+-	charsToString := func(ca []int8) string {
++	charsToString := func(ca []uint8) string {
+ 		s := make([]byte, len(ca))
+ 		var lens int
+ 		for ; lens < len(ca); lens++ {

tidb.spec

@@ -1,6 +1,6 @@
 Name:           tidb
 Version:        4.0.14
-Release:        3
+Release:        4
 Summary:        TiDB is a distributed NewSQL database compatible with MySQL protocol
 
 License:        QL and STRUTIL
@@ -12,6 +12,10 @@ Source2:        tidb-server.toml
 Source3:        vendor.tar.gz
 Patch0:         Set-GOFLAG-to-go-mod-vendor.patch
 Patch1:		0001-fix-release-version.patch
+%ifarch riscv64
+Patch2:     add-riscv-support.patch 
+Patch3:     add-riscv-support-for-vendor.patch
+%endif
 BuildRequires:  golang >= 1.10.0
 Requires(pre):  shadow-utils
 Requires(post): systemd
@@ -20,8 +24,18 @@ Requires(post): systemd
 TiDB is a distributed NewSQL database compatible with MySQL protocol
 
 %prep
+%ifarch riscv64
+%setup -q
+%patch0 -p1
+%patch1 -p1
+%patch2 -p1
+tar xvf %{SOURCE3} -C .
+%patch3 
+%else
 %autosetup -p1
 tar xvf %{SOURCE3} -C .
+%endif
+
 
 %build
 %make_build
@@ -69,6 +83,9 @@ exit 0
 %license LICENSE
 
 %changelog
+* Mon Jul 17 2023 zhangxiang <zhangxiang@iscas.ac.cn> - 4.0.14-4
+- add riscv64 support
+
 * Mon Oct 11 2021 baizhonggui <baizhonggui@huawei.com> - 4.0.14-3
 - Fix commond tidb-server -V 'Release Version' not displayed