diff options
Diffstat (limited to 'config')
| -rw-r--r-- | config/user-libblkid.m4 | 112 |
1 files changed, 6 insertions, 106 deletions
diff --git a/config/user-libblkid.m4 b/config/user-libblkid.m4 index 2dd26238c..5bc7f466a 100644 --- a/config/user-libblkid.m4 +++ b/config/user-libblkid.m4 @@ -1,113 +1,13 @@ dnl # -dnl # Check for ZFS support in libblkid. This test needs to check -dnl # more than if the library exists because we expect there are -dnl # at least 3 flavors of the library out in the wild: -dnl # -dnl # 1) blkid which has no ZFS support -dnl # 2) blkid with ZFS support and a flawed method of probing -dnl # 3) blkid with ZFS support and a working method of probing -dnl # -dnl # To handle this the check first validates that there is a version -dnl # of the library installed. If there is it creates a simulated -dnl # ZFS filesystem and then links a small test app which attempts -dnl # to detect the simualated filesystem type. If it correctly -dnl # identifies the filesystem as ZFS we can safely assume case 3). -dnl # Otherwise we disable blkid support and resort to manual probing. +dnl # Check for libblkid. Basic support for detecting ZFS pools +dnl # has existing in blkid since 2008. dnl # AC_DEFUN([ZFS_AC_CONFIG_USER_LIBBLKID], [ - AC_ARG_WITH([blkid], - [AS_HELP_STRING([--with-blkid], - [support blkid caching @<:@default=check@:>@])], - [], - [with_blkid=check]) - LIBBLKID= - AS_IF([test "x$with_blkid" = xyes], - [ - AC_SUBST([LIBBLKID], ["-lblkid"]) - AC_DEFINE([HAVE_LIBBLKID], 1, - [Define if you have libblkid]) - ]) - - AS_IF([test "x$with_blkid" = xcheck], - [ - AC_CHECK_LIB([blkid], [blkid_get_cache], - [ - AC_MSG_CHECKING([for blkid zfs support]) - - ZFS_DEV=`mktemp` - truncate -s 64M $ZFS_DEV - echo -en "\x0c\xb1\xba\0\0\0\0\0" | \ - dd of=$ZFS_DEV bs=1k count=8 \ - seek=128 conv=notrunc &>/dev/null \ - >/dev/null 2>/dev/null - echo -en "\x0c\xb1\xba\0\0\0\0\0" | \ - dd of=$ZFS_DEV bs=1k count=8 \ - seek=132 conv=notrunc &>/dev/null \ - >/dev/null 2>/dev/null - echo -en "\x0c\xb1\xba\0\0\0\0\0" | \ - dd of=$ZFS_DEV bs=1k count=8 \ - seek=136 conv=notrunc &>/dev/null \ - >/dev/null 2>/dev/null - echo -en "\x0c\xb1\xba\0\0\0\0\0" | \ - dd of=$ZFS_DEV bs=1k count=8 \ - seek=140 conv=notrunc &>/dev/null \ - >/dev/null 2>/dev/null - - saved_LIBS="$LIBS" - LIBS="-lblkid" - - AC_RUN_IFELSE([AC_LANG_PROGRAM( - [ - #include <stdio.h> - #include <stdlib.h> - #include <blkid/blkid.h> - ], - [ - blkid_cache cache; - char *value; - - if (blkid_get_cache(&cache, NULL) < 0) - return 1; - - value = blkid_get_tag_value(cache, "TYPE", - "$ZFS_DEV"); - if (!value) { - blkid_put_cache(cache); - return 2; - } - - if (strcmp(value, "zfs_member")) { - free(value); - blkid_put_cache(cache); - return 0; - } - free(value); - blkid_put_cache(cache); - ])], - [ - rm -f $ZFS_DEV - AC_MSG_RESULT([yes]) - AC_SUBST([LIBBLKID], ["-lblkid"]) - AC_DEFINE([HAVE_LIBBLKID], 1, - [Define if you have libblkid]) - ], - [ - rm -f $ZFS_DEV - AC_MSG_RESULT([no]) - AS_IF([test "x$with_blkid" != xcheck], - [AC_MSG_FAILURE( - [--with-blkid given but unavailable])]) - ]) + AC_CHECK_HEADER([blkid/blkid.h], [], [AC_MSG_FAILURE([ + *** blkid.h missing, libblkid-devel package required])]) - LIBS="$saved_LIBS" - ], - [ - AS_IF([test "x$with_blkid" != xcheck], - [AC_MSG_FAILURE( - [--with-blkid given but unavailable])]) - ] - []) - ]) + AC_SUBST([LIBBLKID], ["-lblkid"]) + AC_DEFINE([HAVE_LIBBLKID], 1, [Define if you have libblkid]) ]) |