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| author | Paolo Bonzini <pbonzini@redhat.com> | 2023-10-05 14:31:27 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2023-10-17 15:20:53 +0200 |
| commit | 230f6e06b83474314898f27c0a7b2f0593071875 (patch) | |
| tree | e284eff89e498a4a22c95ab40a0b1c48173bef0b /include/qemu/compiler.h | |
| parent | 9bad39c7e86a7fea05b66e7d3425f5874b3bbcfb (diff) | |
| download | qemu-230f6e06b83474314898f27c0a7b2f0593071875.zip qemu-230f6e06b83474314898f27c0a7b2f0593071875.tar.gz qemu-230f6e06b83474314898f27c0a7b2f0593071875.tar.bz2 | |
meson: do not use set10
Make all items of config-host.h consistent. To keep the --disable-coroutine-pool
code visible to the compiler, mutuate the IS_ENABLED() macro from Linux.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include/qemu/compiler.h')
| -rw-r--r-- | include/qemu/compiler.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/qemu/compiler.h b/include/qemu/compiler.h index 1109482..c797f0d 100644 --- a/include/qemu/compiler.h +++ b/include/qemu/compiler.h @@ -212,4 +212,19 @@ # define QEMU_USED #endif +/* + * Ugly CPP trick that is like "defined FOO", but also works in C + * code. Useful to replace #ifdef with "if" statements; assumes + * the symbol was defined with Meson's "config.set()", so it is empty + * if defined. + */ +#define IS_ENABLED(x) IS_EMPTY(x) + +#define IS_EMPTY_JUNK_ junk, +#define IS_EMPTY(value) IS_EMPTY_(IS_EMPTY_JUNK_##value) + +/* Expands to either SECOND_ARG(junk, 1, 0) or SECOND_ARG(IS_EMPTY_JUNK_CONFIG_FOO 1, 0) */ +#define SECOND_ARG(first, second, ...) second +#define IS_EMPTY_(junk_maybecomma) SECOND_ARG(junk_maybecomma 1, 0) + #endif /* COMPILER_H */ |