main: Add PHP_BUILD_PROVIDER userland constant (#19157)

This constant can be handy for tools like PIE to determine the origin of a PHP
binary to provide better output / diagnostics.

see php/pie#275
see php/php-src#18168

NEWS

@@ -5,6 +5,7 @@ PHP                                                                        NEWS
 - Core:
   . Add clone-with support to the clone() function. (timwolla, edorian)
   . Fix support for non-userland stream notifiers. (timwolla)
+  . Added PHP_BUILD_PROVIDER constant. (timwolla)
 
 - Curl:
   . Add support for CURLINFO_CONN_ID in curl_getinfo() (thecaliskan)

UPGRADING

@@ -536,6 +536,7 @@ PHP 8.5 UPGRADE NOTES
 
 - Core:
   . PHP_BUILD_DATE.
+  . PHP_BUILD_PROVIDER.
 
 - Curl:
   . CURLINFO_USED_PROXY.

main/main.stub.php

@@ -41,6 +41,14 @@ const PHP_VERSION_ID = UNKNOWN;
  */
 const PHP_BUILD_DATE = UNKNOWN;
 
+#ifdef PHP_BUILD_PROVIDER
+/**
+ * @var string
+ * @cvalue PHP_BUILD_PROVIDER
+ */
+const PHP_BUILD_PROVIDER = UNKNOWN;
+#endif
+
 /**
  * @var bool
  * @cvalue PHP_ZTS

main/main_arginfo.h

@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: cb5c9a3e48b18a773264378099267550ca9e4fc1 */
+ * Stub hash: e8b81aa6f03d36f35def2bb1fcc3563b284a113b */
 
 static void register_main_symbols(int module_number)
 {
@@ -10,6 +10,9 @@ static void register_main_symbols(int module_number)
 	REGISTER_STRING_CONSTANT("PHP_EXTRA_VERSION", PHP_EXTRA_VERSION, CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("PHP_VERSION_ID", PHP_VERSION_ID, CONST_PERSISTENT);
 	REGISTER_STRING_CONSTANT("PHP_BUILD_DATE", php_build_date, CONST_PERSISTENT);
+#if defined(PHP_BUILD_PROVIDER)
+	REGISTER_STRING_CONSTANT("PHP_BUILD_PROVIDER", PHP_BUILD_PROVIDER, CONST_PERSISTENT);
+#endif
 	REGISTER_BOOL_CONSTANT("PHP_ZTS", PHP_ZTS, CONST_PERSISTENT);
 	REGISTER_BOOL_CONSTANT("PHP_DEBUG", PHP_DEBUG, CONST_PERSISTENT);
 	REGISTER_STRING_CONSTANT("PHP_OS", PHP_OS_STR, CONST_PERSISTENT);