Bug #75677 [NEW]: Clang ignores fastcall calling convention on variadic function

From: lwhsu at lwhsu dot org Operating system: Ubuntu/FreeBSD PHP version: master-Git-2017-12-13 (Git) Package: Compile Warning Bug Type: Bug Bug description:Clang ignores fastcall calling convention on variadic function Description: ------------ On a 32-bit system compile a php embedded program with clang will result warning or error like this: In file included from a.c:1: In file included from /usr/include/php/20160303/main/php.h:36: In file included from /usr/include/php/20160303/Zend/zend.h:36: /usr/include/php/20160303/Zend/zend_hash.h:141:15: error: fastcall calling convention ignored on variadic function [-Werror,-Wignored-attributes] ZEND_API void ZEND_FASTCALL 2(HashTable *ht, apply_func_args_t app... ^ /usr/include/php/20160303/Zend/zend_portability.h:239:39: note: expanded from macro 'ZEND_FASTCALL' # define ZEND_FASTCALL __attribute__((fastcall)) ^ 1 error generated. This causes configuring some programs embed php failing. It would be great if we can make ZEND_FASTCALL on this function conditional by compiler type. Test script: --------------- /* compile with clang on a 32-bit system */ #include <php.h> #include <php_main.h> int main() { php_request_startup(); return 0; } -- Edit bug report at https://bugs.php.net/bug.php?id=75677&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=75677&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=75677&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=75677&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=75677&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=75677&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=75677&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=75677&r=needscript Try newer version: https://bugs.php.net/fix.php?id=75677&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=75677&r=support Expected behavior: https://bugs.php.net/fix.php?id=75677&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=75677&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=75677&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=75677&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=75677&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=75677&r=dst IIS Stability: https://bugs.php.net/fix.php?id=75677&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=75677&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=75677&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=75677&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=75677&r=mysqlcfg