diff -Nur argon2-20190702/Makefile new/Makefile
--- argon2-20190702/Makefile	2019-05-20 11:18:00.000000000 +0200
+++ new/Makefile	2022-04-24 00:09:10.859729849 +0200
@@ -37,7 +37,7 @@
 SRC_GENKAT = src/genkat.c
 OBJ = $(SRC:.c=.o)
 
-CFLAGS += -std=c89 -O3 -Wall -g -Iinclude -Isrc
+CFLAGS += $(OPTFLAGS) -Iinclude -Isrc
 
 ifeq ($(NO_THREADS), 1)
 CFLAGS += -DARGON2_NO_THREADS
@@ -48,16 +48,12 @@
 CI_CFLAGS := $(CFLAGS) -Werror=declaration-after-statement -D_FORTIFY_SOURCE=2 \
 				-Wextra -Wno-type-limits -Werror -coverage -DTEST_LARGE_RAM
 
-OPTTARGET ?= native
-OPTTEST := $(shell $(CC) -Iinclude -Isrc -march=$(OPTTARGET) src/opt.c -c \
-			-o /dev/null 2>/dev/null; echo $$?)
 # Detect compatible platform
 ifneq ($(OPTTEST), 0)
 $(info Building without optimizations)
 	SRC += src/ref.c
 else
-$(info Building with optimizations for $(OPTTARGET))
-	CFLAGS += -march=$(OPTTARGET)
+$(info Building with optimizations)
 	SRC += src/opt.c
 endif
 
@@ -128,6 +124,7 @@
 HEADERS = include/argon2.h
 
 INSTALL = install
+LIB_INSTALL_PERM = 0755
 
 # relative paths for different OS
 ifeq ($(KERNEL_NAME), $(filter $(KERNEL_NAME),DragonFly FreeBSD))
@@ -236,7 +233,7 @@
 	$(INSTALL) -d $(INST_INCLUDE)
 	$(INSTALL) -m 0644 $(HEADERS) $(INST_INCLUDE)
 	$(INSTALL) -d $(INST_LIBRARY)
-	$(INSTALL) -m 0644 $(LIBRARIES) $(INST_LIBRARY)
+	$(INSTALL) -m $(LIB_INSTALL_PERM) $(LIBRARIES) $(INST_LIBRARY)
 ifdef LINKED_LIB_SH
 	cd $(INST_LIBRARY) && ln -s $(notdir $(LIB_SH) $(LINKED_LIB_SH))
 endif