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macros: make G_GNUC_CHECK_VERSION() portable

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This removes the use of defined() in a macro expansion, which may not be
portable to some pre-processors. Instead, we hoist the defined check
outside the macro expansion.

https://bugzilla.gnome.org/show_bug.cgi?id=790877
This commit is contained in:
Christian Hergert 2017-11-26 16:00:46 -08:00
parent f5dba7d43c
commit d44afbadda
1 changed files with 7 additions and 4 deletions
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7
glib/gmacros.h
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@ -37,11 +37,14 @@
*/ */
#include <stddef.h> #include <stddef.h>
#ifdef __GNUC__
#define G_GNUC_CHECK_VERSION(major, minor) \ #define G_GNUC_CHECK_VERSION(major, minor) \
(defined(__GNUC__) && \
((__GNUC__ > (major)) || \ ((__GNUC__ > (major)) || \
((__GNUC__ == (major)) && \ ((__GNUC__ == (major)) && \
(__GNUC_MINOR__ >= (minor))))) (__GNUC_MINOR__ >= (minor))))
#else
#define G_GNUC_CHECK_VERSION(major, minor) 0
#endif
/* Here we provide G_GNUC_EXTENSION as an alias for __extension__, /* Here we provide G_GNUC_EXTENSION as an alias for __extension__,
* where this is valid. This allows for warningless compilation of * where this is valid. This allows for warningless compilation of