feat: add lib compilation to makefile

Makefile

@@ -32,7 +32,7 @@ check_targets=$(addprefix check_,${bins})
 src_dirs=$(sort $(dir $(wildcard ${src_dir}/**/)))
 includes=$(patsubst %,-I%,${src_dirs})
 
-CFLAGS+=-g -O0 -std=c99 ${includes}
+CFLAGS+=-g -O0 ${includes} -fPIC
 LDFLAGS+=
 ifdef _USE_PTHREAD
 LDFLAGS+=-lpthread
@@ -55,7 +55,15 @@ all: ${all_targets}
 	${RM} .lastpthread  # Set that the last build was without pthread
 
 .PHONY: install
-install: build ${install_bins_targets}
+install: build ${install_bins_targets} ${install_dir}/lib/libthread.so ${install_dir}/lib/libthread.a
+
+${install_dir}/lib/libthread.so: ${build_dir}/libthread.so
+	@mkdir -p $(dir $@)
+	cp $^ $@
+
+${install_dir}/lib/libthread.a: ${build_dir}/libthread.a
+	@mkdir -p $(dir $@)
+	cp $^ $@
 
 ${install_bins_targets}: ${install_dir}/bin/%: ${build_dir}/%
 	@mkdir -p $(dir $@)
@@ -73,7 +81,7 @@ ${valgrind_targets}: valgrind_%: ${build_dir}/%
 	valgrind $^ --leak-check=full --show-reachable=yes --track-origins=yes
 
 .PHONY: build
-build: ${bins_target}
+build: ${bins_target} ${build_dir}/libthread.so ${build_dir}/libthread.a
 
 .PHONY: pthreads
 pthreads:
@@ -90,6 +98,12 @@ ${check_targets}: check_%: ${build_dir}/%
 ${bins_target}: ${build_dir}/%: ${objs} ${build_dir}/${tst_dir}/%.o
 	${CC} -o $@ $^ ${CFLAGS} ${LDFLAGS}
 
+${build_dir}/libthread.so: ${objs}
+	${CC} -o $@ -shared $^ ${CFLAGS} ${LDFLAGS}
+
+${build_dir}/libthread.a: ${objs}
+	ar rcs $@ $^
+
 ${build_dir}/%.o: %.c
 	@mkdir -p $(dir $@)
 	${CC} -o $@ -c $^ ${CFLAGS}