diff options
Diffstat (limited to 'build-aux/m4/m4-syscmd.m4')
| -rw-r--r-- | build-aux/m4/m4-syscmd.m4 | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/build-aux/m4/m4-syscmd.m4 b/build-aux/m4/m4-syscmd.m4 new file mode 100644 index 00000000..514201fa --- /dev/null +++ b/build-aux/m4/m4-syscmd.m4 @@ -0,0 +1,59 @@ +# -*- Autoconf -*- +# m4-syscmd.m4 -- Allow choice of syscmd shell. +# Written by Eric Blake <ebb9@byu.net> +# +# Copyright (C) 2009-2010, 2013 Free Software Foundation, Inc. +# +# This file is part of GNU M4. +# +# GNU M4 is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# GNU M4 is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. + +# serial 1 + +# M4_SYSCMD +# --------- +# Allow user to choose different shell than /bin/sh for e?syscmd. +AC_DEFUN([M4_SYSCMD], +[AC_MSG_CHECKING([[which shell to use for syscmd]]) +AC_ARG_WITH([syscmd-shell], + [AS_HELP_STRING([--with-syscmd-shell], [shell used by syscmd [/bin/sh]])], + [case $withval in + yes[)] with_syscmd_shell=no;; + esac], [with_syscmd_shell=no]) +if test "$with_syscmd_shell" = no ; then + with_syscmd_shell=/bin/sh + if test "$cross_compiling" != yes ; then +dnl Give mingw a default that is more likely to be available. + AS_IF([AS_EXECUTABLE_P([/bin/sh])], [], + [if (cmd /c) 2>/dev/null; then with_syscmd_shell=cmd; fi]) +dnl Too bad _AS_PATH_WALK is not public. + M4_save_IFS=$IFS; IFS=$PATH_SEPARATOR + for M4_dir in `if (command -p getconf PATH) 2>/dev/null ; then + command -p getconf PATH + else + echo "/bin$PATH_SEPARATOR$PATH" + fi` + do + IFS=$M4_save_IFS + test -z "$M4_dir" && continue + AS_EXECUTABLE_P(["$M4_dir/sh"]) \ + && { with_syscmd_shell=$M4_dir/sh; break; } + done + IFS=$M4_save_IFS + fi +fi +AC_MSG_RESULT([$with_syscmd_shell]) +AC_DEFINE_UNQUOTED([M4_SYSCMD_SHELL], ["$with_syscmd_shell"], + [Shell used by syscmd and esyscmd, must accept -c argument.]) +]) |