diff -up jitterentropy-library/Makefile jitterentropy-library/Makefile
--- jitterentropy-library/Makefile	2021-07-13 17:23:42.954652287 +0200
+++ jitterentropy-library/Makefile	2021-07-13 17:27:27.958549833 +0200
@@ -4,7 +4,7 @@ CC ?= gcc
 #Hardening
 ENABLE_STACK_PROTECTOR ?= 1
 CFLAGS ?= -fwrapv --param ssp-buffer-size=4 -fvisibility=hidden -fPIE -Wcast-align -Wmissing-field-initializers -Wshadow -Wswitch-enum
-CFLAGS +=-Wextra -Wall -pedantic -fPIC -O0 -fwrapv -Wconversion
+CFLAGS +=-Wp,-U_FORTIFY_SOURCE -Wextra -Wall -pedantic -fPIC -O0 -fwrapv -Wconversion
 LDFLAGS +=-Wl,-z,relro,-z,now -lpthread
 
 # Enable internal timer support
@@ -28,7 +28,7 @@ LIBDIR := lib
 INCDIR := include
 SRCDIR := src
 
-INSTALL_STRIP ?= install -s
+INSTALL ?= install
 
 NAME := jitterentropy
 LIBMAJOR=$(shell cat $(SRCDIR)/jitterentropy-base.c | grep define | grep MAJVERSION | awk '{print $$3}')
@@ -73,25 +73,25 @@ cppcheck:
 install: install-man install-shared install-includes
 
 install-man:
-	install -d -m 0755 $(DESTDIR)$(PREFIX)/share/man/man3
-	install -m 644 doc/$(NAME).3 $(DESTDIR)$(PREFIX)/share/man/man3/
+	$(INSTALL) -d -m 0755 $(DESTDIR)$(PREFIX)/share/man/man3
+	$(INSTALL) -m 644 doc/$(NAME).3 $(DESTDIR)$(PREFIX)/share/man/man3/
 	gzip -n -f -9 $(DESTDIR)$(PREFIX)/share/man/man3/$(NAME).3
 
 install-shared:
-	install -d -m 0755 $(DESTDIR)$(PREFIX)/$(LIBDIR)
-	$(INSTALL_STRIP) -m 0755 lib$(NAME).so.$(LIBVERSION) $(DESTDIR)$(PREFIX)/$(LIBDIR)/
+	$(INSTALL) -d -m 0755 $(DESTDIR)$(PREFIX)/$(LIBDIR)
+	$(INSTALL) -m 0755 lib$(NAME).so.$(LIBVERSION) $(DESTDIR)$(PREFIX)/$(LIBDIR)/
 	$(RM) $(DESTDIR)$(PREFIX)/$(LIBDIR)/lib$(NAME).so.$(LIBMAJOR)
 	ln -sf lib$(NAME).so.$(LIBVERSION) $(DESTDIR)$(PREFIX)/$(LIBDIR)/lib$(NAME).so.$(LIBMAJOR)
 	ln -sf lib$(NAME).so.$(LIBMAJOR) $(DESTDIR)$(PREFIX)/$(LIBDIR)/lib$(NAME).so
 
 install-includes:
-	install -d -m 0755 $(DESTDIR)$(PREFIX)/$(INCDIR)
-	install -m 0644 jitterentropy.h $(DESTDIR)$(PREFIX)/$(INCDIR)/
-	install -m 0644 jitterentropy-base-user.h $(DESTDIR)$(PREFIX)/$(INCDIR)/
+	$(INSTALL) -d -m 0755 $(DESTDIR)$(PREFIX)/$(INCDIR)
+	$(INSTALL) -m 0644 jitterentropy.h $(DESTDIR)$(PREFIX)/$(INCDIR)/
+	$(INSTALL) -m 0644 jitterentropy-base-user.h $(DESTDIR)$(PREFIX)/$(INCDIR)/
 
 install-static:
-	install -d -m 0755 $(DESTDIR)$(PREFIX)/$(LIBDIR)
-	install -m 0755 lib$(NAME).a $(DESTDIR)$(PREFIX)/$(LIBDIR)/
+	$(INSTALL) -d -m 0755 $(DESTDIR)$(PREFIX)/$(LIBDIR)
+	$(INSTALL) -m 0755 lib$(NAME).a $(DESTDIR)$(PREFIX)/$(LIBDIR)/
 
 clean:
 	@- $(RM) $(NAME)