Fix AVX512 cache variables not being recognized by configure

The issue was that SPC_EXTRA_PHP_VARS (containing php_cv_have_avx512=no
and php_cv_have_avx512vbmi=no) were being passed as command-line arguments
to ./configure instead of as environment variables. This caused PHP's
autoconf system to ignore the cached values and run AVX512 checks anyway.

Changes:
- LinuxBuilder.php: Parse SPC_EXTRA_PHP_VARS and add them to the
  environment variable array that's passed to configure
- Extension.php: Apply the same fix for shared extension builds

The variables are now properly set in the environment before configure
runs, allowing PHP's autoconf cache system to recognize and use them.

Agent-Logs-Url: https://github.com/crazywhalecc/static-php-cli/sessions/03f84520-e96c-4748-aa05-bfd98e26fed8

Co-authored-by: crazywhalecc <20330940+crazywhalecc@users.noreply.github.com>

Author: Claude

src/SPC/builder/Extension.php

@@ -434,15 +434,26 @@ public function buildUnixShared(): void
             logger()->info("Extension [{$this->getName()}] patched before shared configure");
         }
 
+        // Parse and add SPC_EXTRA_PHP_VARS as environment variables
         $phpvars = getenv('SPC_EXTRA_PHP_VARS') ?: '';
+        if ($phpvars !== '') {
+            // Parse space-separated key=value pairs
+            $parts = preg_split('/\s+/', trim($phpvars), -1, PREG_SPLIT_NO_EMPTY);
+            foreach ($parts as $part) {
+                if (str_contains($part, '=')) {
+                    [$key, $value] = explode('=', $part, 2);
+                    $env[$key] = $value;
+                }
+            }
+        }
 
         shell()->cd($this->source_dir)
             ->setEnv($env)
             ->appendEnv($this->getExtraEnv())
             ->exec(
                 './configure ' . $this->getUnixConfigureArg(true) .
                 ' --with-php-config=' . BUILD_BIN_PATH . '/php-config ' .
-                "--enable-shared --disable-static {$phpvars}"
+                '--enable-shared --disable-static'
             );
 
         if ($this->patchBeforeSharedMake()) {

src/SPC/builder/linux/LinuxBuilder.php

@@ -93,14 +93,27 @@ public function buildPHP(int $build_target = BUILD_TARGET_NONE): void
 
         // prepare build php envs
         // $musl_flag = SPCTarget::getLibc() === 'musl' ? ' -D__MUSL__' : ' -U__MUSL__';
-        $php_configure_env = SystemUtil::makeEnvVarString([
+        $env_vars = [
             'CFLAGS' => getenv('SPC_CMD_VAR_PHP_MAKE_EXTRA_CFLAGS'),
             'CPPFLAGS' => '-I' . BUILD_INCLUDE_PATH, // . ' -Dsomethinghere', // . $musl_flag,
             'LDFLAGS' => '-L' . BUILD_LIB_PATH,
             // 'LIBS' => SPCTarget::getRuntimeLibs(), // do not pass static libraries here yet, they may contain polyfills for libc functions!
-        ]);
+        ];
 
+        // Parse and add SPC_EXTRA_PHP_VARS as environment variables
         $phpvars = getenv('SPC_EXTRA_PHP_VARS') ?: '';
+        if ($phpvars !== '') {
+            // Parse space-separated key=value pairs
+            $parts = preg_split('/\s+/', trim($phpvars), -1, PREG_SPLIT_NO_EMPTY);
+            foreach ($parts as $part) {
+                if (str_contains($part, '=')) {
+                    [$key, $value] = explode('=', $part, 2);
+                    $env_vars[$key] = $value;
+                }
+            }
+        }
+
+        $php_configure_env = SystemUtil::makeEnvVarString($env_vars);
 
         $embed_type = getenv('SPC_CMD_VAR_PHP_EMBED_TYPE') ?: 'static';
         if ($embed_type !== 'static' && SPCTarget::isStatic()) {
@@ -123,7 +136,6 @@ public function buildPHP(int $build_target = BUILD_TARGET_NONE): void
             $json_74 .
             $zts .
             $maxExecutionTimers .
-            $phpvars . ' ' .
             $this->makeStaticExtensionArgs() . ' '
         ));