1#!/usr/bin/m4 2# 3# Copyright (c) 2013-2018 The strace developers. 4# All rights reserved. 5# 6# Redistribution and use in source and binary forms, with or without 7# modification, are permitted provided that the following conditions 8# are met: 9# 1. Redistributions of source code must retain the above copyright 10# notice, this list of conditions and the following disclaimer. 11# 2. Redistributions in binary form must reproduce the above copyright 12# notice, this list of conditions and the following disclaimer in the 13# documentation and/or other materials provided with the distribution. 14# 3. The name of the author may not be used to endorse or promote products 15# derived from this software without specific prior written permission. 16# 17# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28AC_DEFUN([st_ARG_LIBUNWIND], [dnl 29 30AC_ARG_WITH([libunwind], 31 [AS_HELP_STRING([--with-libunwind], 32 [use libunwind to implement stack tracing support])], 33 [case "${withval}" in 34 yes|no|check) ;; 35 *) with_libunwind=yes 36 libunwind_CPPFLAGS="-I${withval}/include" 37 libunwind_LDFLAGS="-L${withval}/lib" ;; 38 esac], 39 [with_libunwind=check] 40) 41 42]) 43 44AC_DEFUN([st_LIBUNWIND], [dnl 45 46libunwind_CPPFLAGS= 47libunwind_LDFLAGS= 48libunwind_LIBS= 49 50AS_IF([test "x$with_libunwind" != xno && test "x$use_unwinder" = x], 51 [saved_CPPFLAGS="$CPPFLAGS" 52 CPPFLAGS="$CPPFLAGS $libunwind_CPPFLAGS" 53 54 AC_CHECK_HEADERS([libunwind-ptrace.h], 55 [saved_LDFLAGS="$LDFLAGS" 56 LDFLAGS="$LDFLAGS $libunwind_LDFLAGS" 57 58 AC_CHECK_LIB([unwind], [backtrace], 59 [libunwind_LIBS="-lunwind $libunwind_LIBS" 60 61 AC_MSG_CHECKING([for unw_create_addr_space in libunwind-generic]) 62 saved_LIBS="$LIBS" 63 LIBS="-lunwind-generic $libunwind_LIBS $LIBS" 64 65 AC_LINK_IFELSE( 66 [AC_LANG_PROGRAM([[#include <libunwind-ptrace.h>]], 67 [[return !unw_create_addr_space(0, 0)]]) 68 ], 69 [AC_MSG_RESULT([yes]) 70 libunwind_LIBS="-lunwind-generic $libunwind_LIBS" 71 72 AC_CHECK_LIB([unwind-ptrace], [_UPT_create], 73 [libunwind_LIBS="-lunwind-ptrace $libunwind_LIBS" 74 use_unwinder=libunwind 75 ], 76 [if test "x$with_libunwind" != xcheck; then 77 AC_MSG_FAILURE([failed to find _UPT_create in libunwind-ptrace]) 78 fi 79 ], 80 [$libunwind_LIBS] 81 ) 82 ], 83 [AC_MSG_RESULT([no]) 84 if test "x$with_libunwind" != xcheck; then 85 AC_MSG_FAILURE([failed to find unw_create_addr_space in libunwind-generic]) 86 fi 87 ] 88 ) 89 90 LIBS="$saved_LIBS" 91 ], 92 [if test "x$with_libunwind" != xcheck; then 93 AC_MSG_FAILURE([failed to find libunwind]) 94 fi 95 ], 96 [$libunwind_LIBS] 97 ) 98 99 LDFLAGS="$saved_LDFLAGS" 100 ], 101 [if test "x$with_libunwind" != xcheck; then 102 AC_MSG_FAILURE([failed to find libunwind-ptrace.h]) 103 fi 104 ] 105 ) 106 107 CPPFLAGS="$saved_CPPFLAGS" 108 ] 109) 110 111if test "x$use_unwinder" = xlibunwind; then 112 AC_DEFINE([USE_LIBUNWIND], 1, 113 [Whether to use libunwind for stack tracing]) 114 AC_SUBST(libunwind_LIBS) 115 AC_SUBST(libunwind_LDFLAGS) 116 AC_SUBST(libunwind_CPPFLAGS) 117fi 118 119]) 120