widl: Generate "static inline" instead of "static FORCEINLINE" for COM inline wrappers.

mingw-w64 defines __forceinline (and therefore FORCEINLINE) as "extern __inline__ __attribute__((__always_inline__,__gnu_inline__)). This means that COM inline wrappers specify multiple storage classes and hence cannot be compiled. Wine defines FORCEINLINE simply as "inline" (and uses "static" everywhere), so this is a non-issue for Wine. However, since Wine and mingw-w64 share the source code of widl and of most IDL headers, this patch changes the definition for both projects. There's no reason to force inlining here, especially since the wrappers need to be manually enabled, and we don't need to match PSDK semantics where these wrappers don't even exist. In practice, use "__inline__" instead of "inline" for GNU C targets, to preserve compatibility with C89 in mingw-w64 headers.

widl: Generate "static inline" instead of "static FORCEINLINE" for COM inline wrappers.
e654b631 · Zebediah Figura · Alexandre Julliard · cb87c14f · e654b631
Commit e654b631 authored Jul 24, 2022 by Zebediah Figura Committed by Alexandre Julliard Sep 28, 2022
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header.c tools/widl/header.c +9 -1

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--- a/tools/widl/header.c
+++ b/tools/widl/header.c
@@ -1315,7 +1315,7 @@ static void write_inline_wrappers(FILE *header, const type_t *iface, const type_
    if (!is_callas(func->attrs)) {
      const var_t *arg;

-      fprintf(header, "static FORCEINLINE ");
+      fprintf(header, "static __WIDL_INLINE ");
      write_type_decl_left(header, type_function_get_ret(func->declspec.type));
      fprintf(header, " %s_%s(", name, get_name(func));
      write_args(header, type_function_get_args(func->declspec.type), name, 1, FALSE, NAME_C);
@@ -2155,6 +2155,14 @@ void write_header(const statement_list_t *stmts)
  fprintf(header, "#ifndef __%s__\n", header_token);
  fprintf(header, "#define __%s__\n\n", header_token);

+  fprintf(header, "#ifndef __WIDL_INLINE\n");
+  fprintf(header, "#if defined(__cplusplus) || defined(_MSC_VER)\n");
+  fprintf(header, "#define __WIDL_INLINE inline\n");
+  fprintf(header, "#elif defined(__GNUC__)\n");
+  fprintf(header, "#define __WIDL_INLINE __inline__\n");
+  fprintf(header, "#endif\n");
+  fprintf(header, "#endif\n\n");
+
  fprintf(header, "/* Forward declarations */\n\n");
  write_forward_decls(header, stmts);