1# ===================================================================
2#   http://www.gnu.org/software/autoconf-archive/ax_is_release.html
3# ===================================================================
4#
5# SYNOPSIS
6#
7#   AX_IS_RELEASE(POLICY)
8#
9# DESCRIPTION
10#
11#   Determine whether the code is being configured as a release, or from git.
12#   Set the ax_is_release variable to 'yes' or 'no'.
13#
14#   If building a release version, it is recommended that the configure script
15#   disable compiler errors and debug features, by conditionalising them on
16#   the ax_is_release variable.  If building from git, these features should
17#   be enabled.
18#
19#   The POLICY parameter specifies how ax_is_release is determined. It can
20#   take the following values:
21#
22#    * git-directory:  ax_is_release will be 'no' if a '.git' directory exists
23#    * minor-version:  ax_is_release will be 'no' if the minor version number
24#                      in $PACKAGE_VERSION is odd; this assumes
25#                      $PACKAGE_VERSION follows the 'major.minor.micro' scheme
26#    * always:         ax_is_release will always be 'yes'
27#    * never:          ax_is_release will always be 'no'
28#
29#   Other policies may be added in future.
30#
31# LICENSE
32#
33#   Copyright (c) 2015 Philip Withnall <philip@tecnocode.co.uk>
34#
35#   Copying and distribution of this file, with or without modification, are
36#   permitted in any medium without royalty provided the copyright notice
37#   and this notice are preserved.
38
39#serial 1
40
41AC_DEFUN([AX_IS_RELEASE],[
42    AC_BEFORE([AC_INIT],[$0])
43
44    m4_case([$1],
45      [git-directory],[
46        # $is_release = (.git directory does not exist)
47        AS_IF([test -d .git],[ax_is_release=no],[ax_is_release=yes])
48      ],
49      [minor-version],[
50        # $is_release = ($minor_version is even)
51        minor_version=`echo "$PACKAGE_VERSION" | sed 's/[[^.]][[^.]]*.\([[^.]][[^.]]*\).*/\1/'`
52        AS_IF([test "$(( $minor_version % 2 ))" -ne 0],
53              [ax_is_release=no],[ax_is_release=yes])
54      ],
55      [always],[ax_is_release=yes],
56      [never],[ax_is_release=no],
57      [
58        AC_MSG_ERROR([Invalid policy. Valid policies: git-directory, minor-version.])
59      ])
60])
61