1 files changed, 37 insertions, 0 deletions
diff --git a/build/get-version.sh b/build/get-version.sh
new file mode 100755
index 0000000..fd685b2
--- /dev/null
+++ b/build/get-version.sh
@@ -0,0 +1,37 @@
+#!/bin/sh
+#
+# extract version numbers from a header file
+#
+# USAGE: get-version.sh CMD VERSION_HEADER PREFIX
+#   where CMD is one of: all, major, libtool
+#   where PREFIX is the prefix to {MAJOR|MINOR|PATCH}_VERSION defines
+#
+#   get-version.sh all returns a dotted version number
+#   get-version.sh major returns just the major version number
+#   get-version.sh libtool returns a version "libtool -version-info" format
+#
+
+if test $# != 3; then
+  echo "USAGE: $0 CMD VERSION_HEADER PREFIX"
+  echo "  where CMD is one of: all, major, libtool"
+  exit 1
+fi
+
+major_sed="/#define.*$3_MAJOR_VERSION/s/^[^0-9]*\([0-9]*\).*$/\1/p"
+minor_sed="/#define.*$3_MINOR_VERSION/s/^[^0-9]*\([0-9]*\).*$/\1/p"
+patch_sed="/#define.*$3_PATCH_VERSION/s/^[^0-9]*\([0-9]*\).*$/\1/p"
+major="`sed -n $major_sed $2`"
+minor="`sed -n $minor_sed $2`"
+patch="`sed -n $patch_sed $2`"
+
+if test "$1" = "all"; then
+  echo ${major}.${minor}.${patch}
+elif test "$1" = "major"; then
+  echo ${major}
+elif test "$1" = "libtool"; then
+  # Yes, ${minor}:${patch}:${minor} is correct due to libtool idiocy.
+  echo ${minor}:${patch}:${minor}
+else
+  echo "ERROR: unknown version CMD ($1)"
+  exit 1
+fi