[dpdk-dev] [PATCH 1/5] eal: fix build with -O1

[Thomas Monjalon <thomas@monjalon.net>]

In case of optimized compilation, RTE_BUILD_BUG_ON use an external
variable which is neither defined, nor used.
It seems not optimized out in case of OPDL compiled with clang -O1:
	opdl_ring.c: undefined reference to `RTE_BUILD_BUG_ON_detected_error'
	clang-6.0: fatal error: linker command failed with exit code 1

Fixes: af75078fece3 ("first public release")
Cc: stable@dpdk.org

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
---
 lib/librte_eal/common/include/rte_common.h | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/lib/librte_eal/common/include/rte_common.h b/lib/librte_eal/common/include/rte_common.h
index 87f0f6302..57acb8485 100644
--- a/lib/librte_eal/common/include/rte_common.h
+++ b/lib/librte_eal/common/include/rte_common.h
@@ -270,16 +270,7 @@ rte_is_aligned(void *ptr, unsigned align)
 /**
  * Triggers an error at compilation time if the condition is true.
  */
-#ifndef __OPTIMIZE__
 #define RTE_BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
-#else
-extern int RTE_BUILD_BUG_ON_detected_error;
-#define RTE_BUILD_BUG_ON(condition) do {             \
-	((void)sizeof(char[1 - 2*!!(condition)]));   \
-	if (condition)                               \
-		RTE_BUILD_BUG_ON_detected_error = 1; \
-} while(0)
-#endif
 
 /**
  * Combines 32b inputs most significant set bits into the least
-- 
2.19.0