suppress valgrind error - avoid accessing uninitialized memory in mq encoder

[openjpeg.git] / CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index b014a00fd7e81c02bfbef5c5e843f37449b0f393..3326b54e5cc24a2c10069f5c146d958dca00938b 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -231,8 +231,10 @@ check_include_files(malloc.h OPJ_HAVE_MALLOC_H)
 include(CheckSymbolExists)
 # _aligned_alloc https://msdn.microsoft.com/en-us/library/8z34s9c6.aspx
 check_symbol_exists(_aligned_malloc malloc.h OPJ_HAVE__ALIGNED_MALLOC)
-# posix_memalign
+# posix_memalign (needs _POSIX_C_SOURCE >= 200112L on Linux)
+set(CMAKE_REQUIRED_DEFINITIONS -D_POSIX_C_SOURCE=200112L)
 check_symbol_exists(posix_memalign stdlib.h OPJ_HAVE_POSIX_MEMALIGN)
+unset(CMAKE_REQUIRED_DEFINITIONS)
 # memalign (obsolete)
 check_symbol_exists(memalign malloc.h OPJ_HAVE_MEMALIGN)
 #-----------------------------------------------------------------------------