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Diffstat (limited to 'development/mawk/README')
| -rw-r--r-- | development/mawk/README | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/development/mawk/README b/development/mawk/README index 795e5fc177..2c3bcc4003 100644 --- a/development/mawk/README +++ b/development/mawk/README @@ -16,3 +16,27 @@ and mawk provides a small number of extensions. This build does not conflict with Slackware's own awk (from the gawk package). + +By default, mawk is built using its own built-in regular expression +engine. There are some slight differences between this and the glibc +regular expression engine: + +- Embedded NUL characters are supported by the built-in engine. For + instance, you can use the hex escape \x00 to match a NUL character. + glibc regexes don't support this. + +- POSIX brace syntax is NOT supported by the built-in engine. For + instance, /a{3}/ to match "aaa" but not "a" or "aa". glibc regexes do + support this. + +If you require the glibc engine, export BUILTIN_REGEX=no in the script's +environment. + +The default version in the .info file is 1.3.4, which is a stable release +from 2009. If you'd like to (or need to) build one of the newer 'snapshot' +releases, get the source from ftp://ftp.invisible-island.net/mawk/ +and export VERSION in the environment. Notice the filenames look like +e.g. "mawk-1.3.4-20171017.tgz". Slackware version numbers can't contain +the hyphen, so use an underscore instead. Example: + +# export "VERSION=1.3.4_20171017" |