Add some cygwin fixes.

* Makefile.in:
  - from cygwin: add -no-undefined to the library link line

* conftools/get-version.sh: (new file)
  - script to extract the version number from expat.h

* configure.in:
  (some from the cygwin patch)
  - update the prereq to 2.52 instead of just 2.50
  - update the AC_INIT line to 2.52 standards: include the package
    name, version (with a lot of gunk to get this), and where to send
    bugs)
  - update the output file generation to 2.52 standards

* make-release.sh:
  - update to use the new get-version.sh script

* lib/expat.h:
  - from cygwin: add a little define for CYGWIN

1 files changed, 46 insertions, 0 deletions

diff --git a/conftools/get-version.sh b/conftools/get-version.sh
new file mode 100755
index 0000000..a70e0fb
--- /dev/null
+++ b/conftools/get-version.sh
@@ -0,0 +1,46 @@
+#!/bin/sh
+#
+# USAGE: get-version.sh path/to/expat.h
+#
+# This script will print Expat's version number on stdout. For example:
+#
+#   $ ./conftools/get-version.sh ./lib/expat.h
+#   1.95.3
+#   $
+#
+
+if test $# = 0; then
+  echo "ERROR: pathname for expat.h was not provided."
+  echo ""
+  echo "USAGE: $0 path/to/expat.h"
+  exit 1
+fi
+if test $# != 1; then
+  echo "ERROR: too many arguments were provided."
+  echo ""
+  echo "USAGE: $0 path/to/expat.h"
+  exit 1
+fi
+
+hdr="$1"
+if test ! -r "$hdr"; then
+  echo "ERROR: '$hdr' does not exist, or is not readable."
+  exit 1
+fi
+
+MAJOR_VERSION="`sed -n -e '/MAJOR_VERSION/s/[^0-9]*//gp' $hdr`"
+MINOR_VERSION="`sed -n -e '/MINOR_VERSION/s/[^0-9]*//gp' $hdr`"
+MICRO_VERSION="`sed -n -e '/MICRO_VERSION/s/[^0-9]*//gp' $hdr`"
+
+# Determine how to tell echo not to print the trailing \n. This is
+# similar to Autoconf's @ECHO_C@ and @ECHO_N@; however, we don't
+#  generate this file via autoconf (in fact, get-version.sh is used
+# to *create* ./configure), so we just do something similar inline.
+case `echo "testing\c"; echo 1,2,3`,`echo -n testing; echo 1,2,3` in
+  *c*,-n*) ECHO_N= ECHO_C='
+' ;;
+  *c*,*  ) ECHO_N=-n ECHO_C= ;;
+  *)      ECHO_N= ECHO_C='\c' ;;
+esac
+
+echo $ECHO_N "$MAJOR_VERSION.$MINOR_VERSION.$MICRO_VERSION$ECHO_C"