Let environment CFLAGS override the debug flags
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4fb8eba..d69a84c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -93,8 +93,8 @@ IF (MSVC)
# Precompiled headers
ELSE ()
+ SET(CMAKE_C_FLAGS_DEBUG "-O0 -g ${CMAKE_C_FLAGS}")
SET(CMAKE_C_FLAGS "-O2 -g -D_GNU_SOURCE -Wall -Wextra -Wno-missing-field-initializers -Wstrict-aliasing=2 -Wstrict-prototypes -Wmissing-prototypes ${CMAKE_C_FLAGS}")
- SET(CMAKE_C_FLAGS_DEBUG "-O0 -g")
IF (MINGW) # MinGW always does PIC and complains if we tell it to
STRING(REGEX REPLACE "-fPIC" "" CMAKE_SHARED_LIBRARY_C_FLAGS "${CMAKE_SHARED_LIBRARY_C_FLAGS}")
ELSE ()