diff options
Diffstat (limited to 'config/zfs-meta.m4')
| -rw-r--r-- | config/zfs-meta.m4 | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/config/zfs-meta.m4 b/config/zfs-meta.m4 new file mode 100644 index 000000000000..b3c1befaac5d --- /dev/null +++ b/config/zfs-meta.m4 @@ -0,0 +1,207 @@ +dnl # +dnl # DESCRIPTION: +dnl # Read meta data from the META file. When building from a git repository +dnl # the ZFS_META_RELEASE field will be overwritten if there is an annotated +dnl # tag matching the form ZFS_META_NAME-ZFS_META_VERSION-*. This allows +dnl # for working builds to be uniquely identified using the git commit hash. +dnl # +dnl # The META file format is as follows: +dnl # ^[ ]*KEY:[ \t]+VALUE$ +dnl # +dnl # In other words: +dnl # - KEY is separated from VALUE by a colon and one or more spaces/tabs. +dnl # - KEY and VALUE are case sensitive. +dnl # - Leading spaces are ignored. +dnl # - First match wins for duplicate keys. +dnl # +dnl # A line can be commented out by preceding it with a '#' (or technically +dnl # any non-space character since that will prevent the regex from +dnl # matching). +dnl # +dnl # WARNING: +dnl # Placing a colon followed by a space or tab (ie, ":[ \t]+") within the +dnl # VALUE will prematurely terminate the string since that sequence is +dnl # used as the awk field separator. +dnl # +dnl # KEYS: +dnl # The following META keys are recognized: +dnl # Name, Version, Release, Date, Author, LT_Current, LT_Revision, LT_Age +dnl # +dnl # Written by Chris Dunlap <cdunlap@llnl.gov>. +dnl # Modified by Brian Behlendorf <behlendorf1@llnl.gov>. +dnl # +AC_DEFUN([ZFS_AC_META], [ + + AH_BOTTOM([ +#undef PACKAGE +#undef PACKAGE_BUGREPORT +#undef PACKAGE_NAME +#undef PACKAGE_STRING +#undef PACKAGE_TARNAME +#undef PACKAGE_VERSION +#undef STDC_HEADERS +#undef VERSION]) + + AC_PROG_AWK + AC_MSG_CHECKING([metadata]) + + META="$srcdir/META" + _zfs_ac_meta_type="none" + if test -f "$META"; then + _zfs_ac_meta_type="META file" + + ZFS_META_NAME=_ZFS_AC_META_GETVAL([(Name|Project|Package)]); + if test -n "$ZFS_META_NAME"; then + AC_DEFINE_UNQUOTED([ZFS_META_NAME], ["$ZFS_META_NAME"], + [Define the project name.] + ) + AC_SUBST([ZFS_META_NAME]) + fi + + ZFS_META_VERSION=_ZFS_AC_META_GETVAL([Version]); + if test -n "$ZFS_META_VERSION"; then + AC_DEFINE_UNQUOTED([ZFS_META_VERSION], + ["$ZFS_META_VERSION"], + [Define the project version.]) + AC_DEFINE_UNQUOTED([SPL_META_VERSION], + [ZFS_META_VERSION], + [Defined for legacy compatibility.]) + AC_SUBST([ZFS_META_VERSION]) + fi + + ZFS_META_RELEASE=_ZFS_AC_META_GETVAL([Release]); + if test ! -f ".nogitrelease" && git rev-parse --git-dir > /dev/null 2>&1; then + _match="${ZFS_META_NAME}-${ZFS_META_VERSION}" + _alias=$(git describe --match=${_match} 2>/dev/null) + _release=$(echo ${_alias}|cut -f3- -d'-'|sed 's/-/_/g') + if test -n "${_release}"; then + ZFS_META_RELEASE=${_release} + _zfs_ac_meta_type="git describe" + else + _match="${ZFS_META_NAME}-${ZFS_META_VERSION}-${ZFS_META_RELEASE}" + _alias=$(git describe --match=${_match} 2>/dev/null) + _release=$(echo ${_alias}|cut -f3- -d'-'|sed 's/-/_/g') + if test -n "${_release}"; then + ZFS_META_RELEASE=${_release} + _zfs_ac_meta_type="git describe" + fi + fi + fi + + if test -n "$ZFS_META_RELEASE"; then + AC_DEFINE_UNQUOTED([ZFS_META_RELEASE], + ["$ZFS_META_RELEASE"], + [Define the project release.]) + AC_DEFINE_UNQUOTED([SPL_META_RELEASE], + [ZFS_META_RELEASE], + [Defined for legacy compatibility.]) + AC_SUBST([ZFS_META_RELEASE]) + + RELEASE="$ZFS_META_RELEASE" + AC_SUBST([RELEASE]) + fi + + ZFS_META_LICENSE=_ZFS_AC_META_GETVAL([License]); + if test -n "$ZFS_META_LICENSE"; then + AC_DEFINE_UNQUOTED([ZFS_META_LICENSE], ["$ZFS_META_LICENSE"], + [Define the project license.] + ) + AC_SUBST([ZFS_META_LICENSE]) + fi + + if test -n "$ZFS_META_NAME" -a -n "$ZFS_META_VERSION"; then + ZFS_META_ALIAS="$ZFS_META_NAME-$ZFS_META_VERSION" + test -n "$ZFS_META_RELEASE" && + ZFS_META_ALIAS="$ZFS_META_ALIAS-$ZFS_META_RELEASE" + AC_DEFINE_UNQUOTED([ZFS_META_ALIAS], + ["$ZFS_META_ALIAS"], + [Define the project alias string.]) + AC_DEFINE_UNQUOTED([SPL_META_ALIAS], + [ZFS_META_ALIAS], + [Defined for legacy compatibility.]) + AC_SUBST([ZFS_META_ALIAS]) + fi + + ZFS_META_DATA=_ZFS_AC_META_GETVAL([Date]); + if test -n "$ZFS_META_DATA"; then + AC_DEFINE_UNQUOTED([ZFS_META_DATA], ["$ZFS_META_DATA"], + [Define the project release date.] + ) + AC_SUBST([ZFS_META_DATA]) + fi + + ZFS_META_AUTHOR=_ZFS_AC_META_GETVAL([Author]); + if test -n "$ZFS_META_AUTHOR"; then + AC_DEFINE_UNQUOTED([ZFS_META_AUTHOR], ["$ZFS_META_AUTHOR"], + [Define the project author.] + ) + AC_SUBST([ZFS_META_AUTHOR]) + fi + + ZFS_META_KVER_MIN=_ZFS_AC_META_GETVAL([Linux-Minimum]); + if test -n "$ZFS_META_KVER_MIN"; then + AC_DEFINE_UNQUOTED([ZFS_META_KVER_MIN], + ["$ZFS_META_KVER_MIN"], + [Define the minimum compatible kernel version.] + ) + AC_SUBST([ZFS_META_KVER_MIN]) + fi + + ZFS_META_KVER_MAX=_ZFS_AC_META_GETVAL([Linux-Maximum]); + if test -n "$ZFS_META_KVER_MAX"; then + AC_DEFINE_UNQUOTED([ZFS_META_KVER_MAX], + ["$ZFS_META_KVER_MAX"], + [Define the maximum compatible kernel version.] + ) + AC_SUBST([ZFS_META_KVER_MAX]) + fi + + m4_pattern_allow([^LT_(CURRENT|REVISION|AGE)$]) + ZFS_META_LT_CURRENT=_ZFS_AC_META_GETVAL([LT_Current]); + ZFS_META_LT_REVISION=_ZFS_AC_META_GETVAL([LT_Revision]); + ZFS_META_LT_AGE=_ZFS_AC_META_GETVAL([LT_Age]); + if test -n "$ZFS_META_LT_CURRENT" \ + -o -n "$ZFS_META_LT_REVISION" \ + -o -n "$ZFS_META_LT_AGE"; then + test -n "$ZFS_META_LT_CURRENT" || ZFS_META_LT_CURRENT="0" + test -n "$ZFS_META_LT_REVISION" || ZFS_META_LT_REVISION="0" + test -n "$ZFS_META_LT_AGE" || ZFS_META_LT_AGE="0" + AC_DEFINE_UNQUOTED([ZFS_META_LT_CURRENT], + ["$ZFS_META_LT_CURRENT"], + [Define the libtool library 'current' + version information.] + ) + AC_DEFINE_UNQUOTED([ZFS_META_LT_REVISION], + ["$ZFS_META_LT_REVISION"], + [Define the libtool library 'revision' + version information.] + ) + AC_DEFINE_UNQUOTED([ZFS_META_LT_AGE], ["$ZFS_META_LT_AGE"], + [Define the libtool library 'age' + version information.] + ) + AC_SUBST([ZFS_META_LT_CURRENT]) + AC_SUBST([ZFS_META_LT_REVISION]) + AC_SUBST([ZFS_META_LT_AGE]) + fi + fi + + AC_MSG_RESULT([$_zfs_ac_meta_type]) + ] +) + +dnl # _ZFS_AC_META_GETVAL (KEY_NAME_OR_REGEX) +dnl # +dnl # Returns the META VALUE associated with the given KEY_NAME_OR_REGEX expr. +dnl # +dnl # Despite their resemblance to line noise, +dnl # the "@<:@" and "@:>@" constructs are quadrigraphs for "[" and "]". +dnl # <www.gnu.org/software/autoconf/manual/autoconf.html#Quadrigraphs> +dnl # +dnl # The "$[]1" and "$[]2" constructs prevent M4 parameter expansion +dnl # so a literal $1 and $2 will be passed to the resulting awk script, +dnl # whereas the "$1" will undergo M4 parameter expansion for the META key. +dnl # +AC_DEFUN([_ZFS_AC_META_GETVAL], + [`$AWK -F ':@<:@ \t@:>@+' '$[]1 ~ /^ *$1$/ { print $[]2; exit }' $META`]dnl +) |