we can build musl with zig cc too, don't need musl toolchain

Author: henderkes

src/SPC/builder/linux/LinuxBuilder.php

@@ -30,7 +30,7 @@ public function __construct(array $options = [])
 
         GlobalEnvManager::init();
 
-        if (getenv('SPC_LIBC') === 'musl' && !SystemUtil::isMuslDist()) {
+        if (getenv('SPC_LIBC') === 'musl' && !SystemUtil::isMuslDist() && !str_contains((string)getenv('CC'), 'zig')) {
             $this->setOptionIfNotExist('library_path', "LIBRARY_PATH=\"/usr/local/musl/{$arch}-linux-musl/lib\"");
             $this->setOptionIfNotExist('ld_library_path', "LD_LIBRARY_PATH=\"/usr/local/musl/{$arch}-linux-musl/lib\"");
             $configure = getenv('SPC_CMD_PREFIX_PHP_CONFIGURE');

src/SPC/builder/unix/library/attr.php

@@ -15,6 +15,9 @@ trait attr
     protected function build(): void
     {
         UnixAutoconfExecutor::create($this)
+            ->appendEnv([
+                'CFLAGS' => '-Wno-int-conversion -Wno-implicit-function-declaration',
+            ])
             ->exec('libtoolize --force --copy')
             ->exec('./autogen.sh || autoreconf -if')
             ->configure('--disable-nls')