[libvirt] [PATCH] fix failure when building with --disable-debug

When building with --disable-debug, VIR_DEBUG expands to a nop. But parameters to VIR_DEBUG can be variables that are passed only to VIR_DEBUG. In the case the building system complains about unused variables. --- src/libvirt_private.syms | 1 + src/util/logging.c | 15 +++++++++++++++ src/util/logging.h | 3 ++- 3 files changed, 18 insertions(+), 1 deletion(-) diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index b173590..48c4df7 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -739,6 +739,7 @@ virLockManagerRelease; # logging.h +virEatParam; virLogDefineFilter; virLogDefineOutput; virLogEmergencyDumpAll; diff --git a/src/util/logging.c b/src/util/logging.c index f8233cd..999dd01 100644 --- a/src/util/logging.c +++ b/src/util/logging.c @@ -1262,3 +1262,18 @@ void virLogSetFromEnv(void) { if (debugEnv && *debugEnv) virLogParseOutputs(debugEnv); } + +/** + * virEatParam: + * + * Do nothing but eat parameters. See VIR_DEBUG_INT. + * + * Currently only VIR_DEBUG_INT uses this function, which could + * have been defined right before VIR_DEBUG_INT, but it makes + * `make syntax-check' unhappy about ATTRIBUTE_UNUSED appearing + * in .h file. + */ +void virEatParam(void *unused ATTRIBUTE_UNUSED, ...) +{ + /* do nothing */ +} diff --git a/src/util/logging.h b/src/util/logging.h index 70318d0..b96a115 100644 --- a/src/util/logging.h +++ b/src/util/logging.h @@ -35,7 +35,7 @@ virLogMessage(category, VIR_LOG_DEBUG, f, l, 0, __VA_ARGS__) # else # define VIR_DEBUG_INT(category, f, l, ...) \ - do { } while (0) + virEatParam((void*)category, f, l, __VA_ARGS__) # endif /* !ENABLE_DEBUG */ # define VIR_INFO_INT(category, f, l, ...) \ @@ -142,4 +142,5 @@ extern void virLogVMessage(const char *category, int priority, va_list vargs) ATTRIBUTE_FMT_PRINTF(6, 0); extern int virLogSetBufferSize(int size); extern void virLogEmergencyDumpAll(int signum); +void virEatParam(void *unused, ...); #endif -- 1.7.10.2