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scanner: make use of __has_attribute()

Browse source 
A more generic way to evaluating various attributes, __has_attribute is
available with gcc, clang, even the Oracle/Sun compiler.

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Derek Foreman <derekf@osg.samsung.com>
This commit is contained in:
Emil Velikov 2018-02-16 16:22:32 +00:00 • committed by Pekka Paalanen
parent ab6b156920
commit bd92689382
1 changed files with 5 additions and 1 deletions
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6
src/scanner.c
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@ -1744,7 +1744,11 @@ emit_code(struct protocol *protocol, enum visibility vis)
* we want to have the symbols hidden. */
if (vis == PRIVATE) {
symbol_visibility = "WL_PRIVATE";
printf("#if defined(__GNUC__) && __GNUC__ >= 4\n"
printf("#ifndef __has_attribute\n"
"# define __has_attribute(x) 0 /* Compatibility with non-clang compilers. */\n"
"#endif\n\n");
printf("#if (__has_attribute(visibility) || defined(__GNUC__) && __GNUC__ >= 4\n"
"#define WL_PRIVATE __attribute__ ((visibility(\"hidden\")))\n"
"#else\n"
"#define WL_PRIVATE\n"