library optimization flag can be selected on command line again

`CFLAGS=-O0 make` will now use `-O0` instead of enforcing `-O3` which used to be the behavior before introduction of `libzstd.mk`. This should result in faster tests, since a few tests depend on this capability for faster roundtrips.
2021-12-23 17:43:12 -08:00 · 2021-12-23 17:43:12 -08:00 · 75525fcb9f
commit 75525fcb9f
parent eebf24bd2a
1 changed files with 1 additions and 1 deletions
--- a/lib/libzstd.mk
+++ b/lib/libzstd.mk
@ -79,7 +79,7 @@ endif
  CFLAGS += -fno-stack-protector -fomit-frame-pointer -fno-ident \
            -DDYNAMIC_BMI2=0 -DNDEBUG
 else
-  CFLAGS += -O3
+  CFLAGS ?= -O3
 endif

 DEBUGLEVEL ?= 0