remove extra libraries for php configure/make, since they're the same and only depend on the target libc

src/SPC/util/SPCConfigUtil.php

@@ -64,9 +64,8 @@ class SPCConfigUtil
 
         // embed
         $libs = trim("-lphp -lc {$libs}");
-        $extra_env = getenv('SPC_CMD_VAR_PHP_MAKE_EXTRA_LIBS');
-        if (is_string($extra_env)) {
-            $libs .= ' ' . trim($extra_env, '"');
+        if ($extra_libs = SPCTarget::getRuntimeLibs()) {
+            $libs .= " {$extra_libs}";
         }
         // c++
         if ($this->builder->hasCpp()) {

src/SPC/util/SPCTarget.php

@@ -74,6 +74,17 @@ class SPCTarget
         return null;
     }
 
+    public static function getRuntimeLibs(): string
+    {
+        if (PHP_OS_FAMILY === 'Linux') {
+            return self::getLibc() === 'musl' ? 'ldl -lpthread -lm' : '-ldl -lrt -lpthread -lm -lresolv -lutil';
+        }
+        if (PHP_OS_FAMILY === 'Darwin') {
+            return '-lresolv';
+        }
+        return '';
+    }
+
     /**
      * Returns the libc version if set, for other OS, it will always return null.
      */