Add Libtool update script

This adds a simple shell script that copies Libtool generated files and
merges all M4 macro files to a single file libtool.m4 for convenience.

Author: petk

scripts/dev/update_libtool.sh

@@ -0,0 +1,68 @@
+#!/bin/sh
+#
+# Update the bundled Libtool files to the latest version.
+
+LIBTOOL_VERSION="2.5.4"
+
+while test $# -gt 0; do
+  if test "$1" = "-h" || test "$1" = "--help"; then
+    cat << HELP
+Libtool updater
+
+This script assembles and updates the bundled Libtool files in php-src.
+
+SYNOPSIS:
+  update_libtool <options>
+
+OPTIONS:
+  -h, --help                 Display this help.
+
+  --version <X.Y.Z>  Set specific Libtool version to download.
+HELP
+    exit 0
+  fi
+
+  if test "$1" = "--version"; then
+    if test -z "$2"; then
+      echo "You must provide Libtool version" >&2
+      echo "Example usage: update_libtool.sh --version $LIBTOOL_VERSION" >&2
+      exit 1;
+    fi
+    LIBTOOL_VERSION="$2"
+    shift
+  fi
+
+  shift
+done
+
+# Go to project root directory.
+cd $(CDPATH= cd -- "$(dirname -- "$0")/../../" && pwd -P)
+
+wget https://ftp.gnu.org/gnu/libtool/libtool-${LIBTOOL_VERSION}.tar.gz
+tar -xvf libtool-${LIBTOOL_VERSION}.tar.gz
+
+LIBTOOL_DIR="libtool-$LIBTOOL_VERSION"
+
+# Copy main Libtool shell script template.
+cp "$LIBTOOL_DIR/build-aux/ltmain.sh" build
+echo "build/ltmain.sh added"
+
+# Join all M4 Libtool macro files to a single libtool.m4 for convenience.
+cat $LIBTOOL_DIR/m4/libtool.m4 \
+    $LIBTOOL_DIR/m4/lt\~obsolete.m4 \
+    $LIBTOOL_DIR/m4/ltoptions.m4 \
+    $LIBTOOL_DIR/m4/ltsugar.m4 \
+    $LIBTOOL_DIR/m4/ltversion.m4 \
+    > build/libtool.m4
+
+# Patch the generated libtool.m4 file for the diagnostic edge cases. The strings
+# "# serial NN ..." should appear once at the top of the M4 macros. For example,
+# when running "autoreconf --warnings=all", which runs aclocal, the
+# "warning: the serial number must appear before any macro definition" appear.
+sed -e 's/^#[ ]*serial .*lt.*/dnl &/g' < build/libtool.m4 \
+  > build/libtool.m4.tmp && mv build/libtool.m4.tmp build/libtool.m4
+echo "build/libtool.m4 assembled and patched"
+
+# Print Libtool version.
+version=$(sed -n 's/m4_define(\[LT_PACKAGE_VERSION\],[ ]*\[\(.*\)\])/\1/p' $LIBTOOL_DIR/m4/ltversion.m4)
+echo "Libtool version $version"