diff -ru bearssl-0.6.orig/conf/Unix.mk bearssl-0.6/conf/Unix.mk

--- bearssl-0.6.orig/conf/Unix.mk	2018-08-14 22:41:54.000000000 +0200

+++ bearssl-0.6/conf/Unix.mk	2021-11-19 11:37:24.523722697 +0100

@@ -38,7 +38,7 @@

 # C compiler and flags.

 CC = cc

-CFLAGS = -W -Wall -Os -fPIC

+CFLAGS ?= -W -Wall -Os -fPIC

 CCOUT = -c -o 

 # Static library building tool.

@@ -47,12 +47,12 @@

 AROUT =

 # DLL building tool.

-LDDLL = cc

+LDDLL = $(CC)

 LDDLLFLAGS = -shared

 LDDLLOUT = -o 

 # Static linker.

-LD = cc

+LD = $(CC)

 LDFLAGS = 

 LDOUT = -o 

@@ -67,3 +67,18 @@

 #DLL = no

 #TOOLS = no

 #TESTS = no

+

+INSTALL ?= install

+PREFIX ?= 

+BINDIR ?= $(PREFIX)/bin

+LIBDIR ?= $(PREFIX)/lib

+INCDIR ?= $(PREFIX)/include

+

+install: build/brssl build/libbearssl.so build/libbearssl.a

+		$(MKDIR) $(DESTDIR)$(BINDIR)

+		$(MKDIR) $(DESTDIR)$(LIBDIR)

+		$(MKDIR) $(DESTDIR)$(INCDIR)

+		$(INSTALL) -c -m 0755 build/brssl $(DESTDIR)$(BINDIR)/brssl

+		$(INSTALL) -c -m 0755 build/libbearssl.so $(DESTDIR)$(LIBDIR)/libbearssl.so

+		$(INSTALL) -c -m 0644 build/libbearssl.a $(DESTDIR)$(LIBDIR)/libbearssl.a

+		$(INSTALL) -c -m 0644 inc/*.h $(DESTDIR)$(INCDIR)/