Re: [PATCH] blkid: add --disable-libblkid (v2)

[Karel Zak <kzak@redhat.com>]

On Mon, Feb 23, 2009 at 06:38:52PM +0100, Karel Zak wrote:
> This patch allows to switch between private (in-tree) libblkid and
> public (in-system installed) library. The private version is still
> enabled by default.

 I found some bugs in my previous patches. Please, use the patch
 below. This patch includes all necessary changes. Sorry.

    Karel


>From 3a75bf0b06b791280c43781544290c5c8838729b Mon Sep 17 00:00:00 2001
From: Karel Zak <kzak@redhat.com>
Date: Tue, 24 Feb 2009 09:10:07 +0100
Subject: [PATCH] blkid: --disable-libblkid to build with external libblkid

 * add --disable-libblkid to switch between private (in-tree) libblkid
   and public (in-system installed) library. The private version is still
   enabled by default.

 * add CONFIG_BUILD_FINDFS to enable/disable findfs(8) code in tune2fs.

Signed-off-by: Karel Zak <kzak@redhat.com>
---
 MCONFIG.in       |   28 ++++++++++++++++++++++------
 Makefile.in      |    3 ++-
 configure.in     |   33 +++++++++++++++++++++++++++++++++
 misc/Makefile.in |   23 ++++++++++++++++-------
 misc/tune2fs.c   |    6 ++++++
 5 files changed, 79 insertions(+), 14 deletions(-)

diff --git a/MCONFIG.in b/MCONFIG.in
index f67682e..c7c16bf 100644
--- a/MCONFIG.in
+++ b/MCONFIG.in
@@ -69,36 +69,52 @@ MKINSTALLDIRS = @MKINSTALLDIRS@
 #
 # Library definitions
 #
+@BLKID_CMT@PRIVATE_LIBBLKID = yes
+
+# public libblkid options
+BLKID_LIBS = @BLKID_LIBS@
+STATIC_BLKID_LIBS = @STATIC_BLKID_LIBS@
+
+ifdef PRIVATE_LIBBLKID
+LIBBLKID = $(LIB)/libblkid@LIB_EXT@ @PRIVATE_LIBS_CMT@ $(LIBUUID)
+DEPLIBBLKID = $(LIB)/libblkid@LIB_EXT@ @PRIVATE_LIBS_CMT@ $(LIBUUID)
+STATIC_LIBBLKID = $(LIB)/libblkid@STATIC_LIB_EXT@ $(STATIC_LIBUUID)
+DEPSTATIC_LIBBLKID = $(LIB)/libblkid@STATIC_LIB_EXT@
+PROFILED_LIBBLKID = $(LIB)/libblkid@PROFILED_LIB_EXT@ $(PROFILED_LIBUUID)
+DEPPROFILED_LIBBLKID = $(LIB)/libblkid@PROFILED_LIB_EXT@
+else
+LIBBLKID = $(BLKID_LIBS) @PRIVATE_LIBS_CMT@ $(LIBUUID)
+DEPLIBBLKID = $(BLKID_LIBS) @PRIVATE_LIBS_CMT@ $(LIBUUID)
+STATIC_LIBBLKID = $(STATIC_BLKID_LIBS) $(STATIC_LIBUUID)
+DEPSTATIC_LIBBLKID = $(STATIC_BLKID_LIBS)
+PROFILED_LIBBLKID = $(BLKID_LIBS) $(PROFILED_LIBUUID)
+DEPPROFILED_LIBBLKID = $(BLKID_LIBS)
+endif
+
 LIB = $(top_builddir)/lib
 LIBSS = $(LIB)/libss@LIB_EXT@ @PRIVATE_LIBS_CMT@ @DLOPEN_LIB@
 LIBCOM_ERR = $(LIB)/libcom_err@LIB_EXT@ @PRIVATE_LIBS_CMT@ @SEM_INIT_LIB@
 LIBE2P = $(LIB)/libe2p@LIB_EXT@
 LIBEXT2FS = $(LIB)/libext2fs@LIB_EXT@
 LIBUUID = $(LIB)/libuuid@LIB_EXT@ @SOCKET_LIB@
-LIBBLKID = $(LIB)/libblkid@LIB_EXT@ @PRIVATE_LIBS_CMT@ $(LIBUUID)
 LIBINTL = @LIBINTL@
 DEPLIBSS = $(LIB)/libss@LIB_EXT@
 DEPLIBUUID = $(LIB)/libuuid@LIB_EXT@
-DEPLIBBLKID = $(LIB)/libblkid@LIB_EXT@ @PRIVATE_LIBS_CMT@ $(LIBUUID)
 
 STATIC_LIBSS = $(LIB)/libss@STATIC_LIB_EXT@ @DLOPEN_LIB@
 STATIC_LIBCOM_ERR = $(LIB)/libcom_err@STATIC_LIB_EXT@ @SEM_INIT_LIB@
 STATIC_LIBE2P = $(LIB)/libe2p@STATIC_LIB_EXT@
 STATIC_LIBEXT2FS = $(LIB)/libext2fs@STATIC_LIB_EXT@
 STATIC_LIBUUID = $(LIB)/libuuid@STATIC_LIB_EXT@ @SOCKET_LIB@ 
-STATIC_LIBBLKID = $(LIB)/libblkid@STATIC_LIB_EXT@ $(STATIC_LIBUUID)
 DEPSTATIC_LIBSS = $(LIB)/libss@STATIC_LIB_EXT@
 DEPSTATIC_LIBUUID = $(LIB)/libuuid@STATIC_LIB_EXT@
-DEPSTATIC_LIBBLKID = $(LIB)/libblkid@STATIC_LIB_EXT@
 
 PROFILED_LIBSS = $(LIB)/libss@PROFILED_LIB_EXT@ @DLOPEN_LIB@
 PROFILED_LIBCOM_ERR = $(LIB)/libcom_err@PROFILED_LIB_EXT@ @SEM_INIT_LIB@
 PROFILED_LIBE2P = $(LIB)/libe2p@PROFILED_LIB_EXT@
 PROFILED_LIBEXT2FS = $(LIB)/libext2fs@PROFILED_LIB_EXT@
 PROFILED_LIBUUID = $(LIB)/libuuid@PROFILED_LIB_EXT@ @SOCKET_LIB@ 
-PROFILED_LIBBLKID = $(LIB)/libblkid@PROFILED_LIB_EXT@ $(PROFILED_LIBUUID)
 DEPPROFILED_LIBUUID = $(LIB)/libuuid@PROFILED_LIB_EXT@
-DEPPROFILED_LIBBLKID = $(LIB)/libblkid@PROFILED_LIB_EXT@
 
 # An include directive pointing to a directory holding enough linux-like
 # include files to satisfy some programs here
diff --git a/Makefile.in b/Makefile.in
index 728d3a5..1f1b8ea 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -11,8 +11,9 @@ INSTALL = @INSTALL@
 
 @RESIZER_CMT@RESIZE_DIR= resize
 @DEBUGFS_CMT@DEBUGFS_DIR= debugfs
+@BLKID_CMT@BLKID_LIB_SUBDIR= lib/blkid
 
-LIB_SUBDIRS=lib/et lib/ss lib/e2p lib/uuid lib/ext2fs lib/blkid intl
+LIB_SUBDIRS=lib/et lib/ss lib/e2p lib/uuid lib/ext2fs $(BLKID_LIB_SUBDIR) intl
 PROG_SUBDIRS=e2fsck $(DEBUGFS_DIR) misc $(RESIZE_DIR) tests/progs po
 SUBDIRS=util $(LIB_SUBDIRS) $(PROG_SUBDIRS) tests
 
diff --git a/configure.in b/configure.in
index 2534df4..732ed30 100644
--- a/configure.in
+++ b/configure.in
@@ -276,6 +276,39 @@ AC_MSG_RESULT([Disabling BSD shared libraries by default])
 AC_SUBST(BSDLIB_CMT)
 AC_SUBST_FILE(MAKEFILE_BSDLIB)
 dnl
+dnl handle --disable-libblkid
+dnl
+PKG_PROG_PKG_CONFIG
+BLKID_LIBS=
+STATIC_BLKID_LIBS=
+BLKID_CMT=
+AC_ARG_ENABLE([libblkid],
+[  --disable-libblkid	  do not build private blkid library],
+if test "$enableval" = "no"
+then
+	if test -z "$PKG_CONFIG"; then
+		AC_MSG_ERROR([pkg-config not installed; please install it.])
+	fi
+
+	AC_CHECK_LIB(blkid, blkid_get_cache,
+		[BLKID_LIBS=`$PKG_CONFIG --libs blkid`;
+		 STATIC_BLKID_LIBS=`$PKG_CONFIG --static --libs blkid`],
+		[AC_MSG_ERROR([external blkid library not found])],
+		[$BLKID_LIBS])
+	BLKID_CMT=#
+	AC_MSG_RESULT([Disabling private blkid library])
+else
+	AC_DEFINE(CONFIG_BUILD_FINDFS)
+	AC_MSG_RESULT([Enabling private blkid library])
+fi
+,
+AC_DEFINE(CONFIG_BUILD_FINDFS)
+AC_MSG_RESULT([Enabling private blkid library by default])
+)
+AC_SUBST(BLKID_CMT)
+AC_SUBST(BLKID_LIBS)
+AC_SUBST(STATIC_BLKID_LIBS)
+dnl
 dnl handle --enable-profile
 dnl
 AC_ARG_ENABLE([profile],
diff --git a/misc/Makefile.in b/misc/Makefile.in
index e35bb8f..d426e57 100644
--- a/misc/Makefile.in
+++ b/misc/Makefile.in
@@ -17,11 +17,18 @@ INSTALL = @INSTALL@
 @UUIDD_CMT@UUIDD_PROG= uuidd
 @UUIDD_CMT@UUIDD_MAN= uuidd.8
 
-SPROGS=		mke2fs badblocks tune2fs dumpe2fs blkid logsave \
+@BLKID_CMT@BLKID_PROG= blkid
+@BLKID_CMT@BLKID_MAN= blkid.8
+@BLKID_CMT@BLKID_PROFILED= blkid.profiled
+
+@BLKID_CMT@FINDFS_LINK= findfs
+@BLKID_CMT@FINDFS_MAN= findfs.8
+
+SPROGS=		mke2fs badblocks tune2fs dumpe2fs $(BLKID_PROG) logsave \
 			$(E2IMAGE_PROG) @FSCK_PROG@ e2undo
 USPROGS=	mklost+found filefrag $(UUIDD_PROG)
 SMANPAGES=	tune2fs.8 mklost+found.8 mke2fs.8 dumpe2fs.8 badblocks.8 \
-			e2label.8 findfs.8 blkid.8 $(E2IMAGE_MAN) \
+			e2label.8 $(FINDFS_MAN) $(BLKID_MAN) $(E2IMAGE_MAN) \
 			logsave.8 filefrag.8 e2undo.8 $(UUIDD_MAN) @FSCK_MAN@
 FMANPAGES=	mke2fs.conf.5
 
@@ -94,7 +101,7 @@ COMPILE_ET=$(top_builddir)/lib/et/compile_et --build-tree
 all:: profiled $(SPROGS) $(UPROGS) $(USPROGS) $(SMANPAGES) $(UMANPAGES) \
 	$(FMANPAGES) $(LPROGS)
 
-@PROFILE_CMT@all:: tune2fs.profiled blkid.profiled e2image.profiled \
+@PROFILE_CMT@all:: tune2fs.profiled $(BLKID_PROFILED) e2image.profiled \
 	e2undo.profiled mke2fs.profiled dumpe2fs.profiled fsck.profiled \
 	logsave.profiled filefrag.profiled uuidgen.profiled uuidd.profiled \
 	e2image.profiled
@@ -397,9 +404,11 @@ install: all $(SMANPAGES) $(UMANPAGES) installdirs
 	@echo "	LINK $(root_sbindir)/e2label"
 	@$(LN) -f $(DESTDIR)$(root_sbindir)/tune2fs \
 		$(DESTDIR)$(root_sbindir)/e2label
-	@echo "	LINK $(root_sbindir)/findfs"
-	@$(LN) -f $(DESTDIR)$(root_sbindir)/tune2fs \
-		$(DESTDIR)$(root_sbindir)/findfs
+	@if test -n "$(FINDFS_LINK)"; then \
+		echo "	LINK $(root_sbindir)/findfs"; \
+		$(LN) -f $(DESTDIR)$(root_sbindir)/tune2fs \
+			$(DESTDIR)$(root_sbindir)/findfs; \
+	fi
 	@for i in $(UPROGS); do \
 		echo "	INSTALL $(bindir)/$$i"; \
 		$(INSTALL_PROGRAM) $$i $(DESTDIR)$(bindir)/$$i; \
@@ -509,7 +518,7 @@ uninstall:
 	for i in $(UMANPAGES); do \
 		$(RM) -f $(DESTDIR)$(man1dir)/$$i; \
 	done
-	for i in findfs e2label ; do \
+	for i in $(FINDFS_LINK) e2label ; do \
 		$(RM) -f $(DESTDIR)$(root_sbindir)/$$i; \
 	done
 	for i in $(FMANPAGES); do \
diff --git a/misc/tune2fs.c b/misc/tune2fs.c
index 887a702..f1c8ab9 100644
--- a/misc/tune2fs.c
+++ b/misc/tune2fs.c
@@ -95,7 +95,9 @@ struct blk_move {
 
 static const char *please_fsck = N_("Please run e2fsck on the filesystem.\n");
 
+#ifdef CONFIG_BUILD_FINDFS
 void do_findfs(int argc, char **argv);
+#endif
 
 static void usage(void)
 {
@@ -836,6 +838,7 @@ static void parse_tune2fs_options(int argc, char **argv)
 	}
 }
 
+#ifdef CONFIG_BUILD_FINDFS
 void do_findfs(int argc, char **argv)
 {
 	char	*dev;
@@ -854,6 +857,7 @@ void do_findfs(int argc, char **argv)
 	puts(dev);
 	exit(0);
 }
+#endif
 
 static void parse_extended_opts(ext2_filsys fs, const char *opts)
 {
@@ -1492,8 +1496,10 @@ int main(int argc, char **argv)
 		program_name = *argv;
 	add_error_table(&et_ext2_error_table);
 
+#ifdef CONFIG_BUILD_FINDFS
 	if (strcmp(get_progname(argv[0]), "findfs") == 0)
 		do_findfs(argc, argv);
+#endif
 	if (strcmp(get_progname(argv[0]), "e2label") == 0)
 		parse_e2label_options(argc, argv);
 	else
-- 
1.6.0.6