Merge pull request #4148 from pks-t/pks/fix-haiku-builds

cmake: only enable supported compiler warning flags

Merge pull request #4148 from pks-t/pks/fix-haiku-builds
cmake: only enable supported compiler warning flags
ba2bc491 · Patrick Steinhardt · GitHub · a454641e · a02e8a38 · ba2bc491
Commit ba2bc491 authored Mar 01, 2017 by Patrick Steinhardt Committed by GitHub Mar 01, 2017
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CMakeLists.txt
+4 -1

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--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -464,7 +464,10 @@ IF (MSVC)
   # Precompiled headers

 ELSE ()
-	SET(CMAKE_C_FLAGS "-D_GNU_SOURCE -Wall -Wextra ${CMAKE_C_FLAGS}")
+	SET(CMAKE_C_FLAGS "-D_GNU_SOURCE ${CMAKE_C_FLAGS}")
+
+	ADD_C_FLAG_IF_SUPPORTED(-Wall)
+	ADD_C_FLAG_IF_SUPPORTED(-Wextra)

 	IF (CMAKE_SYSTEM_NAME MATCHES "(Solaris|SunOS)")
 		SET(CMAKE_C_FLAGS "-std=c99 -D_POSIX_C_SOURCE=200112L -D__EXTENSIONS__ -D_POSIX_PTHREAD_SEMANTICS ${CMAKE_C_FLAGS}")