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Merge pull request #3983 from brauner/2021-09-29.fixes

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build: compiler attribute improvements
This commit is contained in:
Stéphane Graber
2021-09-29 12:45:09 -04:00
committed by GitHub
parent 6187bcb810 ae13cb3b1b
commit 177f5c95dc
2 changed files with 8 additions and 3 deletions
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9
meson.build
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@@ -355,8 +355,13 @@ conf.set10('HAVE_STRCHRNUL', have)
have = cc.has_function('openpty', prefix : '#include <pty.h>', args : '-D_GNU_SOURCE')
conf.set10('HAVE_OPENPTY', have)
conf.set10('HAVE_COMPILER_ATTR_NONNULL', cc.has_function_attribute('nonnull'))
conf.set10('HAVE_COMPILER_ATTR_RETURNS_NONNULL', cc.has_function_attribute('returns_nonnull'))
foreach ccattr : ['fallthrough',
'nonnull',
'returns_nonnull',
]
conf.set10('HAVE_COMPILER_ATTR_' + ccattr.underscorify().to_upper(), cc.has_function_attribute(ccattr))
endforeach
config_h = configure_file(
output : 'config.h',

2
src/lxc/compiler.h
View File

@@ -18,7 +18,7 @@
#endif
#endif
#if __GNUC__ >= 7
#if HAVE_COMPILER_ATTR_FALLTHROUGH || __GNUC__ >= 7
#define __fallthrough __attribute__((__fallthrough__))
#else
#define __fallthrough /* fall through */