1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
#!/usr/bin/m4
#
# Copyright (c) 2013-2020 The strace developers.
# All rights reserved.
#
# SPDX-License-Identifier: LGPL-2.1-or-later
AC_DEFUN([st_ARG_LIBUNWIND], [dnl
libunwind_CPPFLAGS=
libunwind_LDFLAGS=
libunwind_LIBS=
AC_ARG_WITH([libunwind],
[AS_HELP_STRING([--with-libunwind],
[use libunwind to implement stack tracing support])],
[case "${withval}" in
yes|no|check) ;;
*) with_libunwind=yes
libunwind_CPPFLAGS="-I${withval}/include"
libunwind_LDFLAGS="-L${withval}/lib" ;;
esac],
[with_libunwind=check]
)
])
AC_DEFUN([st_LIBUNWIND], [dnl
AS_IF([test "x$with_libunwind" != xno && test "x$use_unwinder" = x],
[saved_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS $libunwind_CPPFLAGS"
AC_CHECK_HEADERS([libunwind-ptrace.h],
[saved_LDFLAGS="$LDFLAGS"
LDFLAGS="$LDFLAGS $libunwind_LDFLAGS"
AC_CHECK_LIB([unwind], [backtrace],
[libunwind_LIBS="-lunwind $libunwind_LIBS"
AC_MSG_CHECKING([for unw_create_addr_space in libunwind-generic])
saved_LIBS="$LIBS"
LIBS="-lunwind-generic $libunwind_LIBS $LIBS"
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([[#include <libunwind-ptrace.h>]],
[[return !unw_create_addr_space(0, 0)]])
],
[AC_MSG_RESULT([yes])
libunwind_LIBS="-lunwind-generic $libunwind_LIBS"
AC_CHECK_LIB([unwind-ptrace], [_UPT_create],
[libunwind_LIBS="-lunwind-ptrace $libunwind_LIBS"
use_unwinder=libunwind
],
[if test "x$with_libunwind" != xcheck; then
AC_MSG_FAILURE([failed to find _UPT_create in libunwind-ptrace])
fi
],
[$libunwind_LIBS]
)
],
[AC_MSG_RESULT([no])
if test "x$with_libunwind" != xcheck; then
AC_MSG_FAILURE([failed to find unw_create_addr_space in libunwind-generic])
fi
]
)
LIBS="$saved_LIBS"
],
[if test "x$with_libunwind" != xcheck; then
AC_MSG_FAILURE([failed to find libunwind])
fi
],
[$libunwind_LIBS]
)
LDFLAGS="$saved_LDFLAGS"
],
[if test "x$with_libunwind" != xcheck; then
AC_MSG_FAILURE([failed to find libunwind-ptrace.h])
fi
]
)
CPPFLAGS="$saved_CPPFLAGS"
]
)
if test "x$use_unwinder" = xlibunwind; then
AC_DEFINE([USE_LIBUNWIND], 1,
[Whether to use libunwind for stack tracing])
AC_SUBST(libunwind_LIBS)
AC_SUBST(libunwind_LDFLAGS)
AC_SUBST(libunwind_CPPFLAGS)
fi
])
|