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[lttng-tools.git] / m4 / ax_jni_include_dir.m4
1 # ===========================================================================
2 # https://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$JNI_INCLUDE_DIR"
26 # done
27 #
28 # If you want to force a specific compiler:
29 #
30 # - at the configure.in level, set JAVAC=yourcompiler before calling
31 # AX_JNI_INCLUDE_DIR
32 #
33 # - at the configure level, setenv JAVAC
34 #
35 # This macro depends on AC_CANONICAL_HOST which requires that config.guess
36 # and config.sub be distributed along with the source code. See autoconf
37 # manual for details.
38 #
39 # Note: This macro can work with the autoconf M4 macros for Java programs.
40 # This particular macro is not part of the original set of macros.
41 #
42 # LICENSE
43 #
44 # Copyright (c) 2008 Don Anderson <dda@sleepycat.com>
45 #
46 # Copying and distribution of this file, with or without modification, are
47 # permitted in any medium without royalty provided the copyright notice
48 # and this notice are preserved. This file is offered as-is, without any
49 # warranty.
50
51 #serial 15
52
53 AU_ALIAS([AC_JNI_INCLUDE_DIR], [AX_JNI_INCLUDE_DIR])
54 AC_DEFUN([AX_JNI_INCLUDE_DIR],[
55
56 AC_REQUIRE([AC_CANONICAL_HOST])
57
58 JNI_INCLUDE_DIRS=""
59
60 if test "x$JAVA_HOME" != x; then
61 _JTOPDIR="$JAVA_HOME"
62 else
63 if test "x$JAVAC" = x; then
64 JAVAC=javac
65 fi
66 AC_PATH_PROG([_ACJNI_JAVAC], [$JAVAC], [no])
67 if test "x$_ACJNI_JAVAC" = xno; then
68 AC_MSG_ERROR([cannot find JDK; try setting \$JAVAC or \$JAVA_HOME])
69 fi
70 _ACJNI_FOLLOW_SYMLINKS("$_ACJNI_JAVAC")
71 _JTOPDIR=`echo "$_ACJNI_FOLLOWED" | sed -e 's://*:/:g' -e 's:/[[^/]]*$::'`
72 fi
73
74 case "$host_os" in
75 darwin*) # Apple Java headers are inside the Xcode bundle.
76 macos_version=$(sw_vers -productVersion | sed -n -e 's/^@<:@0-9@:>@*.\(@<:@0-9@:>@*\).@<:@0-9@:>@*/\1/p')
77 if @<:@ "$macos_version" -gt "7" @:>@; then
78 _JTOPDIR="$(xcrun --show-sdk-path)/System/Library/Frameworks/JavaVM.framework"
79 _JINC="$_JTOPDIR/Headers"
80 else
81 _JTOPDIR="/System/Library/Frameworks/JavaVM.framework"
82 _JINC="$_JTOPDIR/Headers"
83 fi
84 ;;
85 *) _JINC="$_JTOPDIR/include";;
86 esac
87 _AS_ECHO_LOG([_JTOPDIR=$_JTOPDIR])
88 _AS_ECHO_LOG([_JINC=$_JINC])
89
90 # On Mac OS X 10.6.4, jni.h is a symlink:
91 # /System/Library/Frameworks/JavaVM.framework/Versions/Current/Headers/jni.h
92 # -> ../../CurrentJDK/Headers/jni.h.
93 AC_CACHE_CHECK(jni headers, ac_cv_jni_header_path,
94 [
95 if test -f "$_JINC/jni.h"; then
96 ac_cv_jni_header_path="$_JINC"
97 JNI_INCLUDE_DIRS="$JNI_INCLUDE_DIRS $ac_cv_jni_header_path"
98 else
99 _JTOPDIR=`echo "$_JTOPDIR" | sed -e 's:/[[^/]]*$::'`
100 if test -f "$_JTOPDIR/include/jni.h"; then
101 ac_cv_jni_header_path="$_JTOPDIR/include"
102 JNI_INCLUDE_DIRS="$JNI_INCLUDE_DIRS $ac_cv_jni_header_path"
103 else
104 ac_cv_jni_header_path=none
105 fi
106 fi
107 ])
108
109 # get the likely subdirectories for system specific java includes
110 case "$host_os" in
111 bsdi*) _JNI_INC_SUBDIRS="bsdos";;
112 freebsd*) _JNI_INC_SUBDIRS="freebsd";;
113 darwin*) _JNI_INC_SUBDIRS="darwin";;
114 linux*) _JNI_INC_SUBDIRS="linux genunix";;
115 osf*) _JNI_INC_SUBDIRS="alpha";;
116 solaris*) _JNI_INC_SUBDIRS="solaris";;
117 mingw*) _JNI_INC_SUBDIRS="win32";;
118 cygwin*) _JNI_INC_SUBDIRS="win32";;
119 *) _JNI_INC_SUBDIRS="genunix";;
120 esac
121
122 if test "x$ac_cv_jni_header_path" != "xnone"; then
123 # add any subdirectories that are present
124 for JINCSUBDIR in $_JNI_INC_SUBDIRS
125 do
126 if test -d "$_JTOPDIR/include/$JINCSUBDIR"; then
127 JNI_INCLUDE_DIRS="$JNI_INCLUDE_DIRS $_JTOPDIR/include/$JINCSUBDIR"
128 fi
129 done
130 fi
131 ])
132
133 # _ACJNI_FOLLOW_SYMLINKS <path>
134 # Follows symbolic links on <path>,
135 # finally setting variable _ACJNI_FOLLOWED
136 # ----------------------------------------
137 AC_DEFUN([_ACJNI_FOLLOW_SYMLINKS],[
138 # find the include directory relative to the javac executable
139 _cur="$1"
140 while ls -ld "$_cur" 2>/dev/null | grep " -> " >/dev/null; do
141 AC_MSG_CHECKING([symlink for $_cur])
142 _slink=`ls -ld "$_cur" | sed 's/.* -> //'`
143 case "$_slink" in
144 /*) _cur="$_slink";;
145 # 'X' avoids triggering unwanted echo options.
146 *) _cur=`echo "X$_cur" | sed -e 's/^X//' -e 's:[[^/]]*$::'`"$_slink";;
147 esac
148 AC_MSG_RESULT([$_cur])
149 done
150 _ACJNI_FOLLOWED="$_cur"
151 ])# _ACJNI
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