[libvirt] [PATCH v2 1/2] examples: Drop event-test.c dependency on gnulib <verify.h>

Pulling in gnulib just for the <verify.h> header is rather expensive, especially since that header does not require us to link against gnulib. It's better to make the event-test example be standalone by just open-coding a more limited form of a verify() macro that depends on modern gcc (we have enough CI coverage that even though the verify is now a no-op in older setups, we will still notice if we fail to add an event - as a quick test, I still provoked a compile failure on Fedora 29 by deleting a line from domainEvents). Signed-off-by: Eric Blake <eblake(a)redhat.com&gt; --- examples/object-events/event-test.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/examples/object-events/event-test.c b/examples/object-events/event-test.c index 8499e0b38e..6694d3dffc 100644 --- a/examples/object-events/event-test.c +++ b/examples/object-events/event-test.c @@ -6,8 +6,6 @@ #include <signal.h> #include <inttypes.h> -#include <verify.h> - #define VIR_ENUM_SENTINELS #include <libvirt/libvirt.h> @@ -17,6 +15,14 @@ #define STREQ(a, b) (strcmp(a, b) == 0) #define NULLSTR(s) ((s) ? (s) : "<null>") +#if (4 < __GNUC__ + (6 <= __GNUC_MINOR__) \ + && (201112L <= __STDC_VERSION__ || !defined __STRICT_ANSI__) \ + && !defined __cplusplus) +# define verify(cond) _Static_assert(cond, "verify (" #cond ")") +#else +# define verify(cond) +#endif + #ifndef ATTRIBUTE_UNUSED # define ATTRIBUTE_UNUSED __attribute__((__unused__)) #endif -- 2.20.1