[PATCH bzip2 3/6] shared Makefile: add install rule

[~eschwartz]

From: Eli Schwartz <eschwartz93@gmail.com>

This will install the shared components (possibly overwriting these
components installed by the static Makefile).

As a prerequisite, the build rules must be refactored to use file-based
targets.
---
 Makefile-libbz2_so.in | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/Makefile-libbz2_so.in b/Makefile-libbz2_so.in
index 0d2cf8d..21fbe7c 100644
--- a/Makefile-libbz2_so.in
+++ b/Makefile-libbz2_so.in
@@ -26,6 +26,11 @@ CC=@CC@
 BIGFILES=-D_FILE_OFFSET_BITS=64
 CFLAGS=-fpic -fPIC -Wall -Winline @CFLAGS@ $(BIGFILES)
 
+prefix = @prefix@
+exec_prefix = @exec_prefix@
+bindir = @bindir@
+libdir = @libdir@
+
 OBJS= blocksort.o  \
       huffman.o    \
       crctable.o   \
@@ -34,12 +39,23 @@ OBJS= blocksort.o  \
       decompress.o \
       bzlib.o
 
-all: $(OBJS)
+all: libbz2.so.@PACKAGE_VERSION@ bzip2-shared
+
+libbz2.so.@PACKAGE_VERSION@: $(OBJS)
 	$(CC) -shared -Wl,-soname -Wl,libbz2.so.1.0 -o libbz2.so.@PACKAGE_VERSION@ $(OBJS)
-	$(CC) $(CFLAGS) -o bzip2-shared bzip2.c libbz2.so.@PACKAGE_VERSION@
 	rm -f libbz2.so.1.0
 	ln -s libbz2.so.@PACKAGE_VERSION@ libbz2.so.1.0
 
+bzip2-shared: libbz2.so.@PACKAGE_VERSION@
+	$(CC) $(CFLAGS) -o bzip2-shared bzip2.c libbz2.so.@PACKAGE_VERSION@
+
+install: all
+	if ( test ! -d $(DESTDIR)$(bindir) ) ; then mkdir -p $(DESTDIR)$(bindir) ; fi
+	if ( test ! -d $(DESTDIR)$(libdir) ) ; then mkdir -p $(DESTDIR)$(libdir) ; fi
+	cp -f bzip2-shared $(DESTDIR)$(bindir)/bzip2
+	cp -f libbz2.so.@PACKAGE_VERSION@ $(DESTDIR)$(libdir)
+	ln -s -f libbz2.so.@PACKAGE_VERSION@ $(DESTDIR)$(libdir)/libbz2.so.1.0
+
 clean:
 	rm -f $(OBJS) bzip2.o libbz2.so.@PACKAGE_VERSION@ libbz2.so.1.0 bzip2-shared
 
-- 
2.34.2