mysql compile file on RockyLinux 8

[kbkpbot]

Describe the bug

Try to compile mysql code on RockyLinux 8 will fail.

Reproduction Steps

goto vlib/db/mysql

v mysql_test.v -showcc -keepc

Expected Behavior

compile ok

Current Behavior

# v mysql_test.v -showcc -keepc
> C compiler cmd: '/home/github/lang/v/thirdparty/tcc/tcc.exe' '@/tmp/v_0/mysql_test.tmp.c.rsp'
> C compiler response file "/tmp/v_0/mysql_test.tmp.c.rsp":
  -fwrapv -o "/home/github/lang/v/vlib/db/mysql/mysql_test" -D GC_THREADS=1 -D GC_BUILTIN_ATOMIC=1 -I "/home/github/lang/v/thirdparty/libgc/include" -I "/usr/include/mysql -m64" -I "/usr/include" -L "/usr/lib64/mysql" -L "/usr/lib64" "/tmp/v_0/mysql_test.tmp.c" -std=gnu99 -D_DEFAULT_SOURCE -bt25 "/home/github/lang/v/thirdparty/tcc/lib/libgc.a" -ldl -lpthread -lmysqlclient -lssl -lcrypto
> C compiler cmd: 'cc' '@/tmp/v_0/mysql_test.tmp.c.rsp'
> C compiler response file "/tmp/v_0/mysql_test.tmp.c.rsp":
  -fwrapv -o '/home/github/lang/v/vlib/db/mysql/mysql_test' -D GC_THREADS=1 -D GC_BUILTIN_ATOMIC=1 -I "/home/github/lang/v/thirdparty/libgc/include" -I "/usr/include/mysql -m64" -I "/usr/include" -L "/usr/lib64/mysql" -L "/usr/lib64" "/tmp/v_0/mysql_test.tmp.c" -std=gnu99 -D_DEFAULT_SOURCE "/home/github/lang/v/thirdparty/tcc/lib/libgc.a" -ldl -lpthread -lmysqlclient -lssl -lcrypto
builder error: Header file <mysql.h>, needed for module `db.mysql` was not found. Please install the libmysqlclient-dev development headers.

Possible Solution

remove -m64 from compile flags.

Additional Information/Context

No response

V version

V 0.4.10 a298fb8.a298fb8

Environment details (OS name and version, etc.)

V full version	V 0.4.10 a298fb8.a298fb8
OS	linux, "Rocky Linux release 8.10 (Green Obsidian)"
Processor	40 cpus, 64bit, little endian, Intel(R) Xeon(R) CPU E5-2660 v3 @ 2.60GHz
Memory	49.86GB/62.29GB
V executable	/home/github/lang/v/v
V last modified time	2025-04-03 08:16:12
V home dir	OK, value: /home/github/lang/v
VMODULES	OK, value: /root/.vmodules
VTMP	OK, value: /tmp/v_0
Current working dir	OK, value: /home/github/lang/v/vlib/db/mysql
Git version	git version 2.43.5
V git status	weekly.2025.14-dirty
.git/config present	true
cc version	cc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-22)
gcc version	gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-22)
clang version	N/A
tcc version	tcc version 0.9.28rc 2025-02-13 HEAD@f8bd136d (x86_64 Linux)
tcc git status	thirdparty-linux-amd64 696c1d84
emcc version	N/A
glibc version	ldd (GNU libc) 2.28

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[huly-for-github]

Connected to Huly®: V_0.6-22512

[felipensp]

How have you passed as CFLAGS?

It seems related to:

'-m32', '-m64' {
				res.m64 = arg[2] == `6`
				res.cflags += ' ${arg}'
			}

[kbkpbot]

[root@idm1 mysql]# echo $CFLAGS

[root@idm1 mysql]# v mysql_test.v -showcc -keepc
> C compiler cmd: '/home/github/lang/v/thirdparty/tcc/tcc.exe' '@/tmp/v_0/mysql_test.tmp.c.rsp'
> C compiler response file "/tmp/v_0/mysql_test.tmp.c.rsp":
  -fwrapv -o "/home/github/lang/v/vlib/db/mysql/mysql_test" -D GC_THREADS=1 -D GC_BUILTIN_ATOMIC=1 -I "/home/github/lang/v/thirdparty/libgc/include" -I "/usr/include/mysql -m64" -I "/usr/include" -L "/usr/lib64/mysql" -L "/usr/lib64" "/tmp/v_0/mysql_test.tmp.c" -std=gnu99 -D_DEFAULT_SOURCE -bt25 "/home/github/lang/v/thirdparty/tcc/lib/libgc.a" -ldl -lpthread -lmysqlclient -lssl -lcrypto
> C compiler cmd: 'cc' '@/tmp/v_0/mysql_test.tmp.c.rsp'
> C compiler response file "/tmp/v_0/mysql_test.tmp.c.rsp":
  -fwrapv -o '/home/github/lang/v/vlib/db/mysql/mysql_test' -D GC_THREADS=1 -D GC_BUILTIN_ATOMIC=1 -I "/home/github/lang/v/thirdparty/libgc/include" -I "/usr/include/mysql -m64" -I "/usr/include" -L "/usr/lib64/mysql" -L "/usr/lib64" "/tmp/v_0/mysql_test.tmp.c" -std=gnu99 -D_DEFAULT_SOURCE "/home/github/lang/v/thirdparty/tcc/lib/libgc.a" -ldl -lpthread -lmysqlclient -lssl -lcrypto
builder error: Header file <mysql.h>, needed for module `db.mysql` was not found. Please install the libmysqlclient-dev development headers.

CFLAGS not set

[kbkpbot]

It seems the pkgconfig has some bug:

[root@idm1 bin]# ./pkgconfig -c mysqlclient
-I/usr/include/mysql -m64 -I/usr/include
[root@idm1 bin]# pwd
/home/github/lang/v/vlib/v/pkgconfig/bin

system pkg-config get the following result:

[root@idm1 bin]# pkg-config --cflags mysqlclient
-I/usr/include/mysql -m64
[root@idm1 bin]#