Jeremy Drake via Cygwin wrote:
On Fri, 12 Sep 2025, Christian Franke via Cygwin wrote:Testcase: $ cat winapi.c #include <windows.h> int WINAPI SomeDllFunction(int, int, int, int, int); int call_it() { return SomeDllFunction(1, 2, 3, 4, 5); } $ clang -S winapi.c # with 20.1.8 and 21.1.1 winapi.c:2:5: warning: '__stdcall__' calling convention is not supported for this target [-Wignored-attributes] 2 | int WINAPI SomeDllFunction(int, int, int, int, int); | ^ /usr/include/w32api/minwindef.h:98:16: note: expanded from macro 'WINAPI' 98 | #define WINAPI __stdcall | ^ <built-in>:400:34: note: expanded from macro '__stdcall' 400 | #define __stdcall __attribute__((__stdcall__)) | ^ ...This should be fixed in 21.1.1-2, just uploaded. Thanks for the report.
Now no warnings occur for ABI attributes stdcall, cdecl, ms_abi and sysv_abi. Only the latter results in different function call code (6 instead of 4 parameters in registers, additional push/pop if xmm registers). This is consistent with gcc.
clang and x86_64-w64-mingw32-clang generate identical assembly files. -- Thanks, Christian -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
