development/mawk: Add option to build with glibc regexes.

Signed-off-by: B. Watson <yalhcru@gmail.com>

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"

development/mawk/mawk.SlackBuild

@@ -6,9 +6,12 @@
 
 # Licensed under the WTFPL. See http://www.wtfpl.net/txt/copying/ for details.
 
+# 20180902 bkw:
+# - Add BUILTIN_REGEX option.
+
 PRGNAM=mawk
 VERSION=${VERSION:-1.3.4}
-BUILD=${BUILD:-1}
+BUILD=${BUILD:-2}
 TAG=${TAG:-_SBo}
 
 if [ -z "$ARCH" ]; then
@@ -40,23 +43,32 @@ fi
 
 set -e
 
+# This does nothing for 1.3.4, but allows e.g. VERSION=1.3.4_20171017 in
+# the environment.
+SRCVER="$( echo $VERSION | sed 's,_,-,' )"
+
 rm -rf $PKG
 mkdir -p $TMP $PKG $OUTPUT
 cd $TMP
-rm -rf $PRGNAM-$VERSION
-tar xvf $CWD/$PRGNAM-$VERSION.tgz
-cd $PRGNAM-$VERSION
+rm -rf $PRGNAM-$SRCVER
+tar xvf $CWD/$PRGNAM-$SRCVER.tgz
+cd $PRGNAM-$SRCVER
 chown -R root:root .
-find -L . \
- \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
-  -o -perm 511 \) -exec chmod 755 {} \+ -o \
- \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
-  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \+
+find -L .  -perm /111 -a \! -perm 755 -a -exec chmod 755 {} \+ -o \
+        \! -perm /111 -a \! -perm 644 -a -exec chmod 644 {} \+
 
+if [ "${BUILTIN_REGEX:-yes}" = "yes" ]; then
+  REGEX_OPT="--with-builtin-regex"
+  REGEX_DESC="mawk's built-in"
+else
+  REGEX_OPT="--without-builtin-regex"
+  REGEX_DESC="glibc's"
+fi
 
 CFLAGS="$SLKCFLAGS" \
 CXXFLAGS="$SLKCFLAGS" \
 ./configure \
+  $REGEX_OPT \
   --prefix=/usr \
   --libdir=/usr/lib${LIBDIRSUFFIX} \
   --sysconfdir=/etc \
@@ -76,7 +88,7 @@ cp -a ACKNOWLEDGMENT CHANGES COPYING MANIFEST README \
 cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
 
 mkdir -p $PKG/install
-cat $CWD/slack-desc > $PKG/install/slack-desc
+sed "s,@REGEX_DESC@,$REGEX_DESC," $CWD/slack-desc > $PKG/install/slack-desc
 
 cd $PKG
 /sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}

development/mawk/mawk.info

@@ -1,8 +1,8 @@
 PRGNAM="mawk"
-VERSION="1.3.4"
+VERSION="1.3.4_20171017"
 HOMEPAGE="http://invisible-island.net/mawk/mawk.html"
-DOWNLOAD="ftp://ftp.invisible-island.net/mawk/mawk-1.3.4.tgz"
-MD5SUM="b1d27324ae80302452d0fa0c98447b65"
+DOWNLOAD="ftp://ftp.invisible-island.net/mawk/mawk-1.3.4-20171017.tgz"
+MD5SUM="6de7560406cd9836335a7297bb910e08"
 DOWNLOAD_x86_64=""
 MD5SUM_x86_64=""
 REQUIRES=""

development/mawk/slack-desc

@@ -13,7 +13,7 @@ mawk: Language. It's a very fast AWK implementation based on a bytecode
 mawk: interpreter. Originally written by Mike Brennan, mawk is currently
 mawk: maintained by Thomas E. Dickey.
 mawk:
-mawk:
+mawk: Package built with @REGEX_DESC@ regular expression engine.
 mawk:
 mawk:
 mawk: