ax_prog_javah.m4 revision 237944f3
1# ===========================================================================
2#       http://www.gnu.org/software/autoconf-archive/ax_prog_javah.html
3# ===========================================================================
4#
5# SYNOPSIS
6#
7#   AX_PROG_JAVAH
8#
9# DESCRIPTION
10#
11#   AX_PROG_JAVAH tests the availability of the javah header generator and
12#   looks for the jni.h header file. If available, JAVAH is set to the full
13#   path of javah and CPPFLAGS is updated accordingly.
14#
15# LICENSE
16#
17#   Copyright (c) 2008 Luc Maisonobe <luc@spaceroots.org>
18#
19#   Copying and distribution of this file, with or without modification, are
20#   permitted in any medium without royalty provided the copyright notice
21#   and this notice are preserved. This file is offered as-is, without any
22#   warranty.
23
24#serial 8
25
26AU_ALIAS([AC_PROG_JAVAH], [AX_PROG_JAVAH])
27AC_DEFUN([AX_PROG_JAVAH],[
28AC_REQUIRE([AC_CANONICAL_BUILD])dnl
29AC_REQUIRE([AC_PROG_CPP])dnl
30AC_PATH_PROG(JAVAH,javah)
31AS_IF([test -n "$ac_cv_path_JAVAH"],
32      [
33        AC_TRY_CPP([#include <jni.h>],,[
34        ac_save_CPPFLAGS="$CPPFLAGS"
35		_ACJAVAH_FOLLOW_SYMLINKS("$ac_cv_path_JAVAH")
36        ax_prog_javah_bin_dir=`AS_DIRNAME([$_ACJAVAH_FOLLOWED])`
37        ac_dir="`AS_DIRNAME([$ax_prog_javah_bin_dir])`/include"
38        AS_CASE([$build_os],
39                [cygwin*],
40                [ac_machdep=win32],
41                [ac_machdep=`AS_ECHO($build_os) | sed 's,[[-0-9]].*,,'`])
42        CPPFLAGS="$ac_save_CPPFLAGS -I$ac_dir -I$ac_dir/$ac_machdep"
43        AC_TRY_CPP([#include <jni.h>],
44                   ac_save_CPPFLAGS="$CPPFLAGS",
45                   AC_MSG_WARN([unable to include <jni.h>]))
46        CPPFLAGS="$ac_save_CPPFLAGS"])
47      ])
48])
49
50AC_DEFUN([_ACJAVAH_FOLLOW_SYMLINKS],[
51# find the include directory relative to the javac executable
52_cur="$1"
53while ls -ld "$_cur" 2>/dev/null | grep " -> " >/dev/null; do
54        AC_MSG_CHECKING([symlink for $_cur])
55        _slink=`ls -ld "$_cur" | sed 's/.* -> //'`
56        case "$_slink" in
57        /*) _cur="$_slink";;
58        # 'X' avoids triggering unwanted echo options.
59        *) _cur=`echo "X$_cur" | sed -e 's/^X//' -e 's:[[^/]]*$::'`"$_slink";;
60        esac
61        AC_MSG_RESULT([$_cur])
62done
63_ACJAVAH_FOLLOWED="$_cur"
64])
65