Fix compatibility of OPENTELEMETRY_LIKELY_IF

Signed-off-by: owent <admin@owent.net>
open-telemetry · May 13, 2022 · e80ac98 · e80ac98
1 parent 5d07025
commit e80ac98
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/api/include/opentelemetry/common/macros.h b/api/include/opentelemetry/common/macros.h
@@ -7,20 +7,20 @@
 
 #include "opentelemetry/version.h"
 
-#ifndef OPENTELEMETRY_LIKELY_IF
+#if !defined(OPENTELEMETRY_LIKELY_IF) && defined(__cplusplus)
 #  if defined(__has_cpp_attribute)
 #    if __has_cpp_attribute(likely)
 #      define OPENTELEMETRY_LIKELY_IF(...) \
         if (__VA_ARGS__)                   \
         [[likely]]
 #    endif
-#  elif defined(__clang__)
+#  elif __cplusplus >= 202002L && defined(__clang__)
 #    if __clang_major__ >= 12
 #      define OPENTELEMETRY_LIKELY_IF(...) \
         if (__VA_ARGS__)                   \
         [[likely]]
 #    endif
-#  elif defined(__GNUC__)
+#  elif __cplusplus >= 202002L && defined(__GNUC__)
 #    if __GNUC__ >= 9
 #      define OPENTELEMETRY_LIKELY_IF(...) \
         if (__VA_ARGS__)                   \