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#!/usr/bin/m4
#
# Copyright (c) 2018-2021 The strace developers.
# All rights reserved.
#
# SPDX-License-Identifier: LGPL-2.1-or-later
AC_DEFUN([st_STACKTRACE], [dnl
AC_ARG_ENABLE([stacktrace],
[AS_HELP_STRING([--enable-stacktrace=yes|no|check],
[whether to enable stack tracing support, default is check])],
[case "$enableval" in
yes|no|check) enable_stacktrace="$enableval" ;;
*) AC_MSG_ERROR([bad value $enableval for enable-stacktrace option.
Valid options are: yes, no, check.])
;;
esac],
[enable_stacktrace=check])
use_unwinder=
dnl Whether to enable stack tracing support?
AS_IF([test x"$enable_stacktrace" != xno],
[st_ARG_LIBDW
st_ARG_LIBUNWIND
AS_IF([test "x$with_libdw" = xyes && test "x$with_libunwind" = xyes],
[AC_MSG_ERROR([--with-libdw=yes and --with-libunwind=yes are mutually exclusive])],
[test "x$with_libdw" = xyes], [with_libunwind=no],
[test "x$with_libunwind" = xyes], [with_libdw=no]
)
AS_IF([test "x$use_unwinder" = x], [st_LIBDW])
AS_IF([test "x$use_unwinder" = x], [st_LIBUNWIND])
AS_IF([test x"$enable_stacktrace$use_unwinder" = xyes],
[AC_MSG_ERROR([stack tracing support requires an unwinder])]
)
]
)
AC_MSG_CHECKING([whether to enable stack tracing support])
AM_CONDITIONAL([ENABLE_STACKTRACE], [test "x$use_unwinder" != x])
AM_CONDITIONAL([USE_LIBDW], [test "x$use_unwinder" = xlibdw])
AM_CONDITIONAL([USE_LIBUNWIND], [test "x$use_unwinder" = xlibunwind])
use_libiberty=
AS_IF([test "x$use_unwinder" != x],
[AC_DEFINE([ENABLE_STACKTRACE], [1],
[Define to enable stack tracing support])
AC_DEFINE_UNQUOTED([USE_UNWINDER], ["$use_unwinder"],
[The unwinder to use for stack tracing support])
AC_MSG_RESULT([yes, using $use_unwinder])
dnl As stack tracing support is enabled, check for a demangler.
st_DEMANGLE],
[AC_MSG_RESULT([no])])
AM_CONDITIONAL([USE_DEMANGLE], [test "x$use_libiberty" = xyes])
])
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