From a2b3d0409589d9b3084c0bcaa32a7af07cee715c Mon Sep 17 00:00:00 2001
From: Karel Zak <kzak@redhat.com>
Date: Mon, 31 Jan 2011 14:18:46 +0100
Subject: build-sys: enable lsblk and libmount for Linux only

Signed-off-by: Karel Zak <kzak@redhat.com>
---
 TODO                   | 33 +++++++++++++++++++++++++++++++++
 configure.ac           | 17 +++++++++++++----
 misc-utils/Makefile.am |  3 +++
 3 files changed, 49 insertions(+), 4 deletions(-)

diff --git a/TODO b/TODO
index af3750aa..dea40527 100644
--- a/TODO
+++ b/TODO
@@ -1,3 +1,36 @@
+build-sys
+--------
+
+ - we use something like
+
+	AC_ARG_ENABLE(...., enable_foo=check)
+	build_foo=yes
+	if test "x$enable_foo" = xcheck; then
+		if test "x$linux_os" = xno; then
+			build_foo=no
+		fi
+	fi
+	AM_CONDITIONAL(BUILD_LIBMOUNT, test "x$build_foo" = xyes)
+
+   for Linux-only utils in configure.ac. It would be nice to set all defaults
+   for all $enable_ variables at begin of the configure script according to
+   $linux_os. Something like:
+
+	if test "x$linux_os" = xno
+		enable_mount=no
+		enable_libmount=no
+		enable_lsblk=no
+	fi
+
+   then we can remove all "if test "x$enable_foo" = xcheck;" stuff from the rest
+   of the configure script.
+
+ - it would be nice to remove all "if BUILD_LIB{MOUNT,BLKID,UUID}" from the 
+   Makefiles (e.g. misc-utils/Makefile.am) and use BUILD_<utilname> only
+
+   The configure.ac has to care about dependence between utils and librares and
+   enable BUILD_<utilname>.
+
 fsprobe
 -------
 
diff --git a/configure.ac b/configure.ac
index 10250d31..59b55ea0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -445,10 +445,19 @@ AC_ARG_VAR([BLKID_LIBS_STATIC], [-l options for linking statically with blkid])
 
 AC_ARG_ENABLE([libmount],
   AS_HELP_STRING([--disable-libmount], [do not build libmount]),
-  [], enable_libmount=yes
+  [], enable_libmount=check
 )
+build_libmount=yes
+if test "x$enable_libmount" = xcheck; then
+  if test "x$linux_os" = xno; then
+    AC_MSG_WARN([non-linux system; do not build libmount])
+    build_libmount=no
+  fi
+elif test "x$enable_libmount" = xno; then
+    build_libmount=no
+fi
 
-case "$enable_libblkid:$enable_libmount" in
+case "$enable_libblkid:$build_libmount" in
 no:yes)
   AC_MSG_ERROR([cannot enable libmount when libblkid is disabled]) ;;
 esac
@@ -456,7 +465,7 @@ esac
 AC_SUBST([LIBMOUNT_VERSION])
 AC_SUBST([LIBMOUNT_VERSION_INFO])
 AC_DEFINE_UNQUOTED(LIBMOUNT_VERSION, "$LIBMOUNT_VERSION", [libmount version string])
-AM_CONDITIONAL(BUILD_LIBMOUNT, test "x$enable_libmount" = xyes)
+AM_CONDITIONAL(BUILD_LIBMOUNT, test "x$build_libmount" = xyes)
 
 
 AC_ARG_ENABLE([libmount-mount],
@@ -464,7 +473,7 @@ AC_ARG_ENABLE([libmount-mount],
   [], enable_libmount_mount=no
 )
 
-case "$enable_libmount:$enable_libmount_mount" in
+case "$build_libmount:$enable_libmount_mount" in
 no:yes)
   AC_MSG_ERROR([cannot link mount(8) with libmount when libmount is disabled]) ;;
 yes:yes)
diff --git a/misc-utils/Makefile.am b/misc-utils/Makefile.am
index 8b1dbbe2..3f0843b2 100644
--- a/misc-utils/Makefile.am
+++ b/misc-utils/Makefile.am
@@ -50,6 +50,7 @@ wipefs_SOURCES = wipefs.c $(top_srcdir)/lib/strutils.c
 wipefs_LDADD = $(ul_libblkid_la)
 wipefs_CFLAGS = $(AM_CFLAGS) -I$(ul_libblkid_incdir)
 
+if LINUX
 bin_PROGRAMS += lsblk
 dist_man_MANS += lsblk.8
 lsblk_SOURCES = lsblk.c \
@@ -59,6 +60,8 @@ lsblk_SOURCES = lsblk.c \
 		$(top_srcdir)/lib/strutils.c
 lsblk_LDADD = $(ul_libblkid_la)
 lsblk_CFLAGS = $(AM_CFLAGS) -I$(ul_libblkid_incdir)
+endif
+
 if HAVE_STATIC_BLKID
 sbin_PROGRAMS += blkid.static
 blkid_static_SOURCES = $(blkid_SOURCES)
-- 
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