--- Makefile.orig	2017-03-29 16:20:30 UTC
+++ Makefile
@@ -136,11 +136,9 @@ else
   # Enable C99 for gcc to avoid warnings.
   # Note that clang++ aborts with an error if we use `-std=C99',
   # so check for `++' in $(CC) also.
-  ifneq ($(findstring -pedantic,$(COMPILE)),)
     ifeq ($(findstring ++,$(CC)),)
       COMPILE += -std=c99
     endif
-  endif
 
   FTLIB := $(LIB_DIR)/$(LIBRARY).$A