mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-12-22 17:34:18 +03:00
29 lines
1.3 KiB
C
29 lines
1.3 KiB
C
/* GL_LINK_WARNING("literal string") arranges to emit the literal string as
|
|
a linker warning on most glibc systems.
|
|
We use a linker warning rather than a preprocessor warning, because
|
|
#warning cannot be used inside macros. */
|
|
#ifndef GL_LINK_WARNING
|
|
/* This works on platforms with GNU ld and ELF object format.
|
|
Testing __GLIBC__ is sufficient for asserting that GNU ld is in use.
|
|
Testing __ELF__ guarantees the ELF object format.
|
|
Testing __GNUC__ is necessary for the compound expression syntax. */
|
|
# if defined __GLIBC__ && defined __ELF__ && defined __GNUC__
|
|
# define GL_LINK_WARNING(message) \
|
|
GL_LINK_WARNING1 (__FILE__, __LINE__, message)
|
|
# define GL_LINK_WARNING1(file, line, message) \
|
|
GL_LINK_WARNING2 (file, line, message) /* macroexpand file and line */
|
|
# define GL_LINK_WARNING2(file, line, message) \
|
|
GL_LINK_WARNING3 (file ":" #line ": warning: " message)
|
|
# define GL_LINK_WARNING3(message) \
|
|
({ static const char warning[sizeof (message)] \
|
|
__attribute__ ((__unused__, \
|
|
__section__ (".gnu.warning"), \
|
|
__aligned__ (1))) \
|
|
= message "\n"; \
|
|
(void)0; \
|
|
})
|
|
# else
|
|
# define GL_LINK_WARNING(message) ((void) 0)
|
|
# endif
|
|
#endif
|