Keep C pre processor hardening build flags.

This allows for distributions like Debian to apply hardening flags
without patching the makefile.

Signed-off-by: Martin Steigerwald <martin.steigerwald@proact.de>

diff --git a/Makefile b/Makefile
index 6d7fd4e2bbbdeb196d22299d379bebb29172d538..cc8164b27d56766d48de8c22c8860df10dba2f62 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -20,7 +20,7 @@ include config-host.mak
 endif
 
 DEBUGFLAGS = -DFIO_INC_DEBUG
-CPPFLAGS= -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -DFIO_INTERNAL $(DEBUGFLAGS)
+CPPFLAGS+= -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -DFIO_INTERNAL $(DEBUGFLAGS)
 OPTFLAGS= -g -ffast-math
 FIO_CFLAGS= -std=gnu99 -Wwrite-strings -Wall -Wdeclaration-after-statement $(OPTFLAGS) $(EXTFLAGS) $(BUILD_CFLAGS) -I. -I$(SRCDIR)
 LIBS   += -lm $(EXTLIBS)