build-sys: cleanup libuuid stuff

Supported scenarios:

 * internal libuuid (--enable-libuuid, default)

 * external libuuid (--disable-libuuid)
   - systems without pkg-config
   - systems with pkg-config

 * systems without libuuid at all (the library is optional for u-l-ng)

Signed-off-by: Karel Zak <kzak@redhat.com>

1 files changed, 36 insertions, 13 deletions

diff --git a/configure.ac b/configure.ac
index 27d8fa354..574be2194 100644
--- a/configure.ac
+++ b/configure.ac
@@ -201,13 +201,39 @@ AC_DEFUN([UTIL_RESTORE_FLAGS], [
 ])
 
 
-UTIL_CHECK_LIB(uuid, uuid_is_null)
-if test "x$have_uuid" = xno; then
-  AC_MSG_WARN([uuid library is not found; mkswap(8) will not generate UUIDs])
+AC_ARG_ENABLE([libuuid],
+  AS_HELP_STRING([--disable-libuuid], [do not build libuuid and uuid utilities]),
+  [], enable_libuuid=yes
+)
+AC_SUBST(LIBUUID_VERSION)
+AM_CONDITIONAL(BUILD_LIBUUID, test "x$enable_libuuid" = xyes)
+have_uuid=yes
+
+if test "x$enable_libuuid" = xno; then
+  # Check for external (e2fsprogs) libuuid
+  PKG_CHECK_MODULES(UUID, uuid, [have_uuid=yes], [have_uuid=no])
+  if test "x$have_uuid" = xno; then
+    # system without pkg-config or so, try classic check
+    AC_CHECK_LIB(uuid, uuid_is_null, [have_uuid=yes], [have_uuid=no])
+  fi
+  if test "x$have_uuid" = xyes; then
+    UTIL_SET_FLAGS($UUID_CFLAGS, $UUID_CFLAGS, $UUID_LIBS)
+    AC_CHECK_HEADERS([uuid.h uuid/uuid.h], [break], [])
+    UTIL_RESTORE_FLAGS
+  fi
+else
+  # internal librray
+  AC_DEFINE(HAVE_UUID_H, 1, [Define to 1 if you have the <uuid.h> header file.])
 fi
 
-UTIL_CHECK_LIB(util, openpty)
-UTIL_CHECK_LIB(termcap, tgetnum)
+if test "x$have_uuid" = xyes; then
+  AC_DEFINE(HAVE_LIBUUID, 1, [Define to 1 if you have the -luuid.])
+else
+  AC_MSG_WARN([uuid library is not found; mkswap(8) will not generate UUIDs])
+fi
+AM_CONDITIONAL(HAVE_UUID, test "x$have_uuid" = xyes)
+# default
+: ${UUID_LIBS='-luuid'}
 
 
 AC_ARG_WITH([fsprobe],
@@ -269,14 +295,6 @@ fi
 AM_CONDITIONAL(BUILD_MOUNT, test "x$build_mount" = xyes)
 
 
-AC_ARG_ENABLE([libuuid],
-  AS_HELP_STRING([--disable-libuuid], [do not build libuuid and uuid utilities]),
-  [], enable_libuuid=yes
-)
-AC_SUBST(LIBUUID_VERSION)
-AM_CONDITIONAL(BUILD_LIBUUID, test "x$enable_libuuid" = xyes)
-
-
 AC_ARG_ENABLE([fsck],
   AS_HELP_STRING([--enable-fsck], [do build fsck]),
   [], enable_fsck=no
@@ -289,6 +307,8 @@ fi
 AM_CONDITIONAL(BUILD_FSCK, test "x$enable_fsck" = xyes)
 
 
+
+
 dnl UTIL_PKG_STATIC(VARIABLE, MODULES)
 dnl ----------------------------------
 AC_DEFUN([UTIL_PKG_STATIC], [
@@ -299,6 +319,7 @@ AC_DEFUN([UTIL_PKG_STATIC], [
   fi
 ])
 
+
 # These default values should work in most cases:
 : ${BLKID_LIBS='-lblkid -luuid'}
 : ${VOLUME_ID_LIBS='-lvolume_id'}
@@ -314,6 +335,8 @@ fi
 AC_ARG_VAR([BLKID_LIBS_STATIC], [-l options for linking statically with blkid])
 AC_ARG_VAR([VOLUME_ID_LIBS_STATIC], [-l options for linking statically with volume_id])
 
+UTIL_CHECK_LIB(util, openpty)
+UTIL_CHECK_LIB(termcap, tgetnum)
 
 AM_GNU_GETTEXT_VERSION([0.14.1])
 AM_GNU_GETTEXT([external])