Build: add Flex version check
[lttng-tools.git] / config / ax_jni_include_dir.m4
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1# ===========================================================================
2# http://www.gnu.org/software/autoconf-archive/ax_jni_include_dir.html
3# ===========================================================================
4#
5# SYNOPSIS
6#
7# AX_JNI_INCLUDE_DIR
8#
9# DESCRIPTION
10#
11# AX_JNI_INCLUDE_DIR finds include directories needed for compiling
12# programs using the JNI interface.
13#
14# JNI include directories are usually in the Java distribution. This is
15# deduced from the value of $JAVA_HOME, $JAVAC, or the path to "javac", in
16# that order. When this macro completes, a list of directories is left in
17# the variable JNI_INCLUDE_DIRS.
18#
19# Example usage follows:
20#
21# AX_JNI_INCLUDE_DIR
22#
23# for JNI_INCLUDE_DIR in $JNI_INCLUDE_DIRS
24# do
25# CPPFLAGS="$CPPFLAGS -I$JNI_INCLUDE_DIR"
26# done
27#
28# If you want to force a specific compiler:
29#
30# - at the configure.in level, set JAVAC=yourcompiler before calling
31# AX_JNI_INCLUDE_DIR
32#
33# - at the configure level, setenv JAVAC
34#
35# Note: This macro can work with the autoconf M4 macros for Java programs.
36# This particular macro is not part of the original set of macros.
37#
38# LICENSE
39#
40# Copyright (c) 2008 Don Anderson <dda@sleepycat.com>
41#
42# Copying and distribution of this file, with or without modification, are
43# permitted in any medium without royalty provided the copyright notice
44# and this notice are preserved. This file is offered as-is, without any
45# warranty.
46
47#serial 10
48
49AU_ALIAS([AC_JNI_INCLUDE_DIR], [AX_JNI_INCLUDE_DIR])
50AC_DEFUN([AX_JNI_INCLUDE_DIR],[
51
52JNI_INCLUDE_DIRS=""
53
54if test "x$JAVA_HOME" != x; then
55 _JTOPDIR="$JAVA_HOME"
56else
57 if test "x$JAVAC" = x; then
58 JAVAC=javac
59 fi
60 AC_PATH_PROG([_ACJNI_JAVAC], [$JAVAC], [no])
61 if test "x$_ACJNI_JAVAC" = xno; then
62 AC_MSG_ERROR([cannot find JDK; try setting \$JAVAC or \$JAVA_HOME])
63 fi
64 _ACJNI_FOLLOW_SYMLINKS("$_ACJNI_JAVAC")
65 _JTOPDIR=`echo "$_ACJNI_FOLLOWED" | sed -e 's://*:/:g' -e 's:/[[^/]]*$::'`
66fi
67
68case "$host_os" in
69 darwin*) _JTOPDIR=`echo "$_JTOPDIR" | sed -e 's:/[[^/]]*$::'`
70 _JINC="$_JTOPDIR/Headers";;
71 *) _JINC="$_JTOPDIR/include";;
72esac
73_AS_ECHO_LOG([_JTOPDIR=$_JTOPDIR])
74_AS_ECHO_LOG([_JINC=$_JINC])
75
76# On Mac OS X 10.6.4, jni.h is a symlink:
77# /System/Library/Frameworks/JavaVM.framework/Versions/Current/Headers/jni.h
78# -> ../../CurrentJDK/Headers/jni.h.
79AC_CHECK_FILE([$_JINC/jni.h],
80 [JNI_INCLUDE_DIRS="$JNI_INCLUDE_DIRS $_JINC"],
81 [_JTOPDIR=`echo "$_JTOPDIR" | sed -e 's:/[[^/]]*$::'`
82 AC_CHECK_FILE([$_JTOPDIR/include/jni.h],
83 [JNI_INCLUDE_DIRS="$JNI_INCLUDE_DIRS $_JTOPDIR/include"],
84 AC_MSG_ERROR([cannot find JDK header files]))
85 ])
86
87# get the likely subdirectories for system specific java includes
88case "$host_os" in
89bsdi*) _JNI_INC_SUBDIRS="bsdos";;
90freebsd*) _JNI_INC_SUBDIRS="freebsd";;
91linux*) _JNI_INC_SUBDIRS="linux genunix";;
92osf*) _JNI_INC_SUBDIRS="alpha";;
93solaris*) _JNI_INC_SUBDIRS="solaris";;
94mingw*) _JNI_INC_SUBDIRS="win32";;
95cygwin*) _JNI_INC_SUBDIRS="win32";;
96*) _JNI_INC_SUBDIRS="genunix";;
97esac
98
99# add any subdirectories that are present
100for JINCSUBDIR in $_JNI_INC_SUBDIRS
101do
102 if test -d "$_JTOPDIR/include/$JINCSUBDIR"; then
103 JNI_INCLUDE_DIRS="$JNI_INCLUDE_DIRS $_JTOPDIR/include/$JINCSUBDIR"
104 fi
105done
106])
107
108# _ACJNI_FOLLOW_SYMLINKS <path>
109# Follows symbolic links on <path>,
110# finally setting variable _ACJNI_FOLLOWED
111# ----------------------------------------
112AC_DEFUN([_ACJNI_FOLLOW_SYMLINKS],[
113# find the include directory relative to the javac executable
114_cur="$1"
115while ls -ld "$_cur" 2>/dev/null | grep " -> " >/dev/null; do
116 AC_MSG_CHECKING([symlink for $_cur])
117 _slink=`ls -ld "$_cur" | sed 's/.* -> //'`
118 case "$_slink" in
119 /*) _cur="$_slink";;
120 # 'X' avoids triggering unwanted echo options.
121 *) _cur=`echo "X$_cur" | sed -e 's/^X//' -e 's:[[^/]]*$::'`"$_slink";;
122 esac
123 AC_MSG_RESULT([$_cur])
124done
125_ACJNI_FOLLOWED="$_cur"
126])# _ACJNI
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