1 #
2 # Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
3 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 #
5 # This code is free software; you can redistribute it and/or modify it
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7 # published by the Free Software Foundation. Oracle designates this
8 # particular file as subject to the "Classpath" exception as provided
9 # by Oracle in the LICENSE file that accompanied this code.
10 #
11 # This code is distributed in the hope that it will be useful, but WITHOUT
12 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 # version 2 for more details (a copy is included in the LICENSE file that
15 # accompanied this code).
16 #
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20 #
21 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23 # questions.
24 #
25
26 ################################################################################
27 # Setup libelf (ELF library)
28 ################################################################################
29 AC_DEFUN_ONCE([LIB_SETUP_LIBELF],
30 [
31 AC_ARG_WITH(libelf, [AS_HELP_STRING([--with-libelf],
32 [specify prefix directory for the libelf package
33 (expecting the libraries under PATH/lib and the headers under PATH/include)])])
34 AC_ARG_WITH(libelf-include, [AS_HELP_STRING([--with-libelf-include],
35 [specify directory for the libelf include files])])
36 AC_ARG_WITH(libelf-lib, [AS_HELP_STRING([--with-libelf-lib],
37 [specify directory for the libelf library])])
38
39 if test "x$ENABLE_AOT" = xfalse; then
40 if (test "x${with_libelf}" != x && test "x${with_libelf}" != xno) || \
41 (test "x${with_libelf_include}" != x && test "x${with_libelf_include}" != xno) || \
42 (test "x${with_libelf_lib}" != x && test "x${with_libelf_lib}" != xno); then
43 AC_MSG_WARN([[libelf is not used, so --with-libelf[-*] is ignored]])
44 fi
45 LIBELF_CFLAGS=
46 LIBELF_LIBS=
47 else
48 LIBELF_FOUND=no
49
50 if test "x${with_libelf}" = xno || test "x${with_libelf_include}" = xno || test "x${with_libelf_lib}" = xno; then
51 ENABLE_AOT="false"
52 if test "x${enable_aot}" = xyes; then
53 AC_MSG_ERROR([libelf is explicitly disabled, cannot build AOT. Enable libelf or remove --enable-aot to disable AOT.])
54 fi
55 else
56 if test "x${with_libelf}" != x; then
57 ELF_LIBS="-L${with_libelf}/lib -lelf"
58 ELF_CFLAGS="-I${with_libelf}/include"
59 LIBELF_FOUND=yes
60 fi
61 if test "x${with_libelf_include}" != x; then
62 ELF_CFLAGS="-I${with_libelf_include}"
63 LIBELF_FOUND=yes
64 fi
65 if test "x${with_libelf_lib}" != x; then
66 ELF_LIBS="-L${with_libelf_lib} -lelf"
67 LIBELF_FOUND=yes
68 fi
69 # Do not try pkg-config if we have a sysroot set.
70 if test "x$SYSROOT" = x; then
71 if test "x$LIBELF_FOUND" = xno; then
72 # Figure out ELF_CFLAGS and ELF_LIBS
73 PKG_CHECK_MODULES([ELF], [libelf], [LIBELF_FOUND=yes], [LIBELF_FOUND=no])
74 fi
75 fi
76 if test "x$LIBELF_FOUND" = xno; then
77 AC_CHECK_HEADERS([libelf.h],
78 [
79 LIBELF_FOUND=yes
80 ELF_CFLAGS=
81 ELF_LIBS=-lelf
82 ],
83 [LIBELF_FOUND=no]
84 )
85 fi
86 if test "x$LIBELF_FOUND" = xno; then
87 ENABLE_AOT="false"
88 HELP_MSG_MISSING_DEPENDENCY([elf])
89 if test "x${enable_aot}" = xyes; then
90 AC_MSG_ERROR([libelf not found, cannot build AOT. Remove --enable-aot to disable AOT or: $HELP_MSG])
91 else
92 AC_MSG_WARN([libelf not found, cannot build AOT. $HELP_MSG])
93 fi
94 else
95 AC_MSG_CHECKING([if libelf works])
96 AC_LANG_PUSH(C)
97 OLD_CFLAGS="$CFLAGS"
98 CFLAGS="$CFLAGS $ELF_CFLAGS"
99 OLD_LIBS="$LIBS"
100 LIBS="$LIBS $ELF_LIBS"
101 AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <libelf.h>],
102 [
103 elf_version(0);
104 return 0;
105 ])],
106 [LIBELF_WORKS=yes],
107 [LIBELF_WORKS=no]
108 )
109 CFLAGS="$OLD_CFLAGS"
110 LIBS="$OLD_LIBS"
111 AC_LANG_POP(C)
112 AC_MSG_RESULT([$LIBELF_WORKS])
113
114 if test "x$LIBELF_WORKS" = xno; then
115 ENABLE_AOT="false"
116 HELP_MSG_MISSING_DEPENDENCY([elf])
117 if test "x$enable_aot" = "xyes"; then
118 AC_MSG_ERROR([Found libelf but could not link and compile with it. Remove --enable-aot to disable AOT or: $HELP_MSG])
119 else
120 AC_MSG_WARN([Found libelf but could not link and compile with it. $HELP_MSG])
121 fi
122 fi
123 fi
124 fi
125 fi
126
127 AC_SUBST(ELF_CFLAGS)
128 AC_SUBST(ELF_LIBS)
129 ])