```diff
diff --git a/build/Linux-x86_64-GCC/Makefile b/build/Linux-x86_64-GCC/Makefile
-index 42c5e6b..17fd807 100644
+index 58db2f3..c8330aa 100644
--- a/build/Linux-x86_64-GCC/Makefile
+++ b/build/Linux-x86_64-GCC/Makefile
@@ -60,9 +60,9 @@ LINK_PYTHON = \
DELETE = rm -f
C_INCLUDES = -I. -I$(SOURCE_DIR)/$(SPECIALIZE_TYPE) -I$(SOURCE_DIR)/include
--OPTIMISATION = -O2 #-march=core-avx2
-+OPTIMISATION = -fPIC -O2 #-march=core-avx2
+-OPTIMISATION = -O2 -march=core-avx2
++OPTIMISATION = -O2 -fPIC^M
COMPILE_C = \
- gcc -c -Werror-implicit-function-declaration -DSOFTPOSIT_FAST_INT64 \
-+ gcc -std=c99 -c -Werror-implicit-function-declaration -DSOFTPOSIT_FAST_INT64 \
++ gcc -std=c99 -c -Werror-implicit-function-declaration -DSOFTPOSIT_FAST_INT64 \^M
$(SOFTPOSIT_OPTS) $(C_INCLUDES) $(OPTIMISATION) \
-o $@
MAKELIB = ar crs $@
setuptools.setup(
name='sfpy',
- version='0.4.2',
+ version='0.4.3',
author='Bill Zorn',
author_email='bill.zorn@gmail.com',
url='https://github.com/billzorn/sfpy',