| #!/usr/bin/m4 |
| # |
| # Copyright (c) 2018 The strace developers. |
| # All rights reserved. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions |
| # are met: |
| # 1. Redistributions of source code must retain the above copyright |
| # notice, this list of conditions and the following disclaimer. |
| # 2. Redistributions in binary form must reproduce the above copyright |
| # notice, this list of conditions and the following disclaimer in the |
| # documentation and/or other materials provided with the distribution. |
| # 3. The name of the author may not be used to endorse or promote products |
| # derived from this software without specific prior written permission. |
| # |
| # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| AC_DEFUN([st_ARG_LIBDW], [dnl |
| |
| : ${libdw_CPPFLAGS=} |
| : ${libdw_CFLAGS=} |
| : ${libdw_LDFLAGS=} |
| : ${libdw_LIBS=} |
| |
| AC_ARG_WITH([libdw], |
| [AS_HELP_STRING([--with-libdw], |
| [use libdw to implement stack tracing support] |
| ) |
| ], |
| [case "${withval}" in |
| yes|no|check) ;; |
| *) libdw_CPPFLAGS="-I${withval}/include" |
| libdw_LDFLAGS="-L${withval}/lib" |
| with_libdw=yes ;; |
| esac |
| ], |
| [with_libdw=check] |
| ) |
| |
| ]) |
| |
| AC_DEFUN([st_LIBDW], [dnl |
| |
| have_libdw= |
| |
| AS_IF([test "x$with_libdw" != xno && test "x$use_unwinder" = x], |
| [saved_CPPFLAGS="$CPPFLAGS" |
| saved_CFLAGS="$CFLAGS" |
| CPPFLAGS="$CPPFLAGS $libdw_CPPFLAGS" |
| CFLAGS="$CFLAGS $libdw_CFLAGS" |
| |
| AC_CHECK_HEADERS([elfutils/libdwfl.h], |
| [AC_CHECK_LIB([dw], [dwfl_linux_proc_attach], |
| [libdw_LIBS="-ldw $libdw_LIBS" |
| AC_CACHE_CHECK([for elfutils version], |
| [st_cv_ELFUTILS_VERSION], |
| [[st_cv_ELFUTILS_VERSION="$(echo _ELFUTILS_VERSION | |
| $CPP $CPPFLAGS -P -imacros elfutils/version.h - | |
| grep '^[0-9]')" |
| test -n "$st_cv_ELFUTILS_VERSION" || |
| st_cv_ELFUTILS_VERSION=0 |
| ]] |
| ) |
| AS_IF([test "$st_cv_ELFUTILS_VERSION" -ge 164], |
| [have_libdw=yes], |
| [AS_IF([test "x$with_libdw" = xyes], |
| [AC_MSG_ERROR([elfutils version >= 164 is required for stack tracing support])], |
| [AC_MSG_WARN([elfutils version >= 164 is required for stack tracing support])] |
| ) |
| ] |
| ) |
| ], |
| [AS_IF([test "x$with_libdw" = xyes], |
| [AC_MSG_FAILURE([failed to find dwfl_linux_proc_attach in libdw])], |
| ) |
| ], |
| [$libdw_LDFLAGS $libdw_LIBS] |
| ) |
| ], |
| [AS_IF([test "x$with_libdw" = xyes], |
| [AC_MSG_FAILURE([failed to find elfutils/libdwfl.h])] |
| ) |
| ] |
| ) |
| |
| CFLAGS="$saved_CFLAGS" |
| CPPFLAGS="$saved_CPPFLAGS" |
| ] |
| ) |
| |
| AS_IF([test "x$have_libdw" = xyes], |
| [use_unwinder=libdw |
| AC_DEFINE([USE_LIBDW], 1, |
| [Whether to use libdw for stack tracing] |
| ) |
| AC_SUBST(libdw_CPPFLAGS) |
| AC_SUBST(libdw_CFLAGS) |
| AC_SUBST(libdw_LDFLAGS) |
| AC_SUBST(libdw_LIBS) |
| ] |
| ) |
| |
| ]) |