[PATCH 1/7] Build basic shared library

[Jes Sorensen <jes.sorensen@gmail.com>]

From: Jes Sorensen <jsorensen@fb.com>

Signed-off-by: Jes Sorensen <jsorensen@fb.com>
---
 Makefile | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index b9c09b9..006fc60 100644
--- a/Makefile
+++ b/Makefile
@@ -1,20 +1,32 @@
 EXE := fsverity
+LIB := libfsverity.so
 CFLAGS := -O2 -Wall
 CPPFLAGS := -D_FILE_OFFSET_BITS=64
 LDLIBS := -lcrypto
 DESTDIR := /usr/local
+LIBDIR := /usr/lib64
 SRC := $(wildcard *.c)
-OBJ := $(SRC:.c=.o)
+OBJ := fsverity.o
+SSRC := hash_algs.c cmd_sign.c cmd_enable.c cmd_measure.c util.c
+SOBJ := hash_algs.so cmd_sign.so cmd_enable.so cmd_measure.so util.so
 HDRS := $(wildcard *.h)
 
 all:$(EXE)
 
-$(EXE):$(OBJ)
+$(EXE):$(OBJ) $(LIB)
+	$(CC) -o $@ $< -L . -l fsverity
 
 $(OBJ): %.o: %.c $(HDRS)
+	$(CC) -c $(CFLAGS) $(CPPFLAGS) $< -o $@
+
+$(SOBJ): %.so: %.c $(HDRS)
+	$(CC) -c -fPIC $(CFLAGS) $(CPPFLAGS) $< -o $@
+
+libfsverity.so: $(SOBJ)
+	$(CC) $(LDLIBS) -shared -o libfsverity.so $(SOBJ)
 
 clean:
-	rm -f $(EXE) $(OBJ)
+	rm -f $(EXE) $(OBJ) $(SOBJ) $(LIB)
 
 install:all
 	install -Dm755 -t $(DESTDIR)/bin $(EXE)
-- 
2.24.1