3 # Copyright (c) 2018 The strace developers.
6 # Redistribution and use in source and binary forms, with or without
7 # modification, are permitted provided that the following conditions
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.
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.
28 AC_DEFUN([st_ARG_LIBDW], [dnl
36 [AS_HELP_STRING([--with-libdw],
37 [use libdw to implement stack tracing support]
42 *) libdw_CPPFLAGS="-I${withval}/include"
43 libdw_LDFLAGS="-L${withval}/lib"
52 AC_DEFUN([st_LIBDW], [dnl
56 AS_IF([test "x$with_libdw" != xno && test "x$use_unwinder" = x],
57 [saved_CPPFLAGS="$CPPFLAGS"
58 saved_CFLAGS="$CFLAGS"
59 CPPFLAGS="$CPPFLAGS $libdw_CPPFLAGS"
60 CFLAGS="$CFLAGS $libdw_CFLAGS"
62 AC_CHECK_HEADERS([elfutils/libdwfl.h],
63 [AC_CHECK_LIB([dw], [dwfl_linux_proc_attach],
64 [libdw_LIBS="-ldw $libdw_LIBS"
65 AC_CACHE_CHECK([for elfutils version],
66 [st_cv_ELFUTILS_VERSION],
67 [[st_cv_ELFUTILS_VERSION="$(echo _ELFUTILS_VERSION |
68 $CPP $CPPFLAGS -P -imacros elfutils/version.h - |
70 test -n "$st_cv_ELFUTILS_VERSION" ||
71 st_cv_ELFUTILS_VERSION=0
74 AS_IF([test "$st_cv_ELFUTILS_VERSION" -ge 164],
76 [AS_IF([test "x$with_libdw" = xyes],
77 [AC_MSG_ERROR([elfutils version >= 164 is required for stack tracing support])],
78 [AC_MSG_WARN([elfutils version >= 164 is required for stack tracing support])]
83 [AS_IF([test "x$with_libdw" = xyes],
84 [AC_MSG_FAILURE([failed to find dwfl_linux_proc_attach in libdw])],
87 [$libdw_LDFLAGS $libdw_LIBS]
90 [AS_IF([test "x$with_libdw" = xyes],
91 [AC_MSG_FAILURE([failed to find elfutils/libdwfl.h])]
96 CFLAGS="$saved_CFLAGS"
97 CPPFLAGS="$saved_CPPFLAGS"
101 AS_IF([test "x$have_libdw" = xyes],
103 AC_DEFINE([USE_LIBDW], 1,
104 [Whether to use libdw for stack tracing]
106 AC_SUBST(libdw_CPPFLAGS)
107 AC_SUBST(libdw_CFLAGS)
108 AC_SUBST(libdw_LDFLAGS)