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util: Add a NORETURN macro

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Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Ian Romanick <idr@freedesktop.org>
This commit is contained in:
Jason Ekstrand
2017-08-16 17:16:45 -07:00
parent 591a07632c
commit 0c49aa0624
3 changed files with 11 additions and 0 deletions
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1
configure.ac
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@@ -250,6 +250,7 @@ AX_GCC_FUNC_ATTRIBUTE([visibility])
AX_GCC_FUNC_ATTRIBUTE([warn_unused_result]) AX_GCC_FUNC_ATTRIBUTE([warn_unused_result])
AX_GCC_FUNC_ATTRIBUTE([weak]) AX_GCC_FUNC_ATTRIBUTE([weak])
AX_GCC_FUNC_ATTRIBUTE([alias]) AX_GCC_FUNC_ATTRIBUTE([alias])
AX_GCC_FUNC_ATTRIBUTE([noreturn])
AM_CONDITIONAL([GEN_ASM_OFFSETS], test "x$GEN_ASM_OFFSETS" = xyes) AM_CONDITIONAL([GEN_ASM_OFFSETS], test "x$GEN_ASM_OFFSETS" = xyes)

4
meson.build
View File

@@ -479,6 +479,10 @@ if cc.compiles('int foo(void) { return 0; } int bar(void) __attribute__((alias("
name : '__attribute__((alias(...)))') name : '__attribute__((alias(...)))')
pre_args += '-DHAVE_FUNC_ATTRIBUTE_ALIAS' pre_args += '-DHAVE_FUNC_ATTRIBUTE_ALIAS'
endif endif
if cc.compiles('int foo(void) __attribute__((__noreturn__));',
name : '__attribute__((__noreturn__))')
pre_args += '-DHAVE_FUNC_ATTRIBUTE_NORETURN'
endif
# TODO: this is very incomplete # TODO: this is very incomplete
if ['linux', 'cygwin'].contains(host_machine.system()) if ['linux', 'cygwin'].contains(host_machine.system())

6
src/util/macros.h
View File

@@ -171,6 +171,12 @@ do { \
#define ATTRIBUTE_RETURNS_NONNULL #define ATTRIBUTE_RETURNS_NONNULL
#endif #endif
#ifdef HAVE_FUNC_ATTRIBUTE_NORETURN
#define NORETURN __attribute__((__noreturn__))
#else
#define NORETURN
#endif
#ifdef __cplusplus #ifdef __cplusplus
/** /**
* Macro function that evaluates to true if T is a trivially * Macro function that evaluates to true if T is a trivially