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authorCarlos O'Donell <carlos@redhat.com>2016-10-29 23:45:40 -0400
committerCarlos O'Donell <carlos@redhat.com>2016-10-29 23:50:56 -0400
commit93fe09cb5fbf68e473d5514adc069d2f6115cc23 (patch)
tree5feb90cefe21213db677fc6d331563132ffe3cc6 /include
parent960294f00a33559af40143ac056f68d21c006d27 (diff)
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Bug 20729: Fix building with -Os.
This commit adds a new DIAG_IGNORE_Os_NEEDS_COMMENT which is only enabled when compiling with -Os. This allows developers working on -Os enabled builds to mark false-positive warnings without impacting the warnings emitted at -O2. Then using the new DIAG_IGNORE_Os_NEEDS_COMMENT we fix 6 warnings generated with GCC 5 to get -Os builds working again.
Diffstat (limited to 'include')
-rw-r--r--include/libc-internal.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/include/libc-internal.h b/include/libc-internal.h
index 7a185bb..e4395dd 100644
--- a/include/libc-internal.h
+++ b/include/libc-internal.h
@@ -111,4 +111,19 @@ extern __typeof (__profile_frequency) __profile_frequency attribute_hidden;
#define DIAG_IGNORE_NEEDS_COMMENT(version, option) \
_Pragma (_DIAG_STR (GCC diagnostic ignored option))
+/* Similar to DIAG_IGNORE_NEEDS_COMMENT the following macro ignores the
+ diagnostic OPTION but only if optimizations for size are enabled.
+ This is required because different warnings may be generated for
+ different optimization levels. For example a key piece of code may
+ only generate a warning when compiled at -Os, but at -O2 you could
+ still want the warning to be enabled to catch errors. In this case
+ you would use DIAG_IGNORE_Os_NEEDS_COMMENT to disable the warning
+ only for -Os. */
+#ifdef __OPTIMIZE_SIZE__
+# define DIAG_IGNORE_Os_NEEDS_COMMENT(version, option) \
+ _Pragma (_DIAG_STR (GCC diagnostic ignored option))
+#else
+# define DIAG_IGNORE_Os_NEEDS_COMMENT(version, option)
+#endif
+
#endif /* _LIBC_INTERNAL */