Mercurial > hg > octave-lyh > gnulib-hg
changeset 9478:c96110318f14
New module posix-shell, for determining a POSIX shell
or perhaps something that is close enough to a POSIX shell.
* m4/posix-shell.m4: New file.
* modules/posix-shell: New file.
* MODULES.html.sh: Mention new module.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Thu, 15 Nov 2007 16:28:05 -0800 |
parents | 96f72b145235 |
children | 5c14f373b379 |
files | ChangeLog MODULES.html.sh m4/posix-shell.m4 modules/posix-shell |
diffstat | 4 files changed, 95 insertions(+), 0 deletions(-) [+] |
line wrap: on
line diff
--- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,11 @@ 2007-11-15 Paul Eggert <eggert@cs.ucla.edu> + New module posix-shell, for determining a POSIX shell + or perhaps something that is close enough to a POSIX shell. + * m4/posix-shell.m4: New file. + * modules/posix-shell: New file. + * MODULES.html.sh: Mention new module. + New module gnu-make, for determining whether we're using GNU Make. * m4/gnu-make.m4: New file. * modules/gnu-make: New file.
--- a/MODULES.html.sh +++ b/MODULES.html.sh @@ -2731,6 +2731,7 @@ func_module gnu-make func_module host-os func_module perl + func_module posix-shell func_module uptime func_end_table }
new file mode 100644 --- /dev/null +++ b/m4/posix-shell.m4 @@ -0,0 +1,58 @@ +# Find a POSIX-conforming shell. + +# Copyright (C) 2007 Free Software Foundation, Inc. + +# This file is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# Written by Paul Eggert. + +# If a POSIX-conforming shell can be found, set POSIX_SHELL and +# PREFERABLY_POSIX_SHELL to it. If not, set POSIX_SHELL to the +# empty string and PREFERABLY_POSIX_SHELL to '/bin/sh'. + +AC_DEFUN([gl_POSIX_SHELL], +[ + AC_CACHE_CHECK([for a shell that conforms to POSIX], [gl_cv_posix_shell], + [gl_test_POSIX_SHELL=' + func_return () { + (exit [$]1) + } + func_success () { + func_return 0 + } + func_failure () { + func_return 1 + } + func_ret_success () { + return 0 + } + func_ret_failure () { + return 1 + } + test "[$](echo foo)" = foo && + func_success && + ! func_failure && + func_ret_success && + ! func_ret_failure && + (set x && func_ret_success y && test x = "[$]1") + ' + for gl_cv_posix_shell in \ + "$CONFIG_SHELL" "$SHELL" /bin/sh /bin/bash /bin/ksh /bin/sh5 no; do + case $gl_cv_posix_shell in + /*) + "$gl_cv_posix_shell" -c "$gl_test_POSIX_shell" 2>/dev/null && break;; + esac + done]) + + if test "$gl_cv_posix_shell" != no; then + POSIX_SHELL=$gl_cv_posix_shell + PREFERABLY_POSIX_SHELL=$POSIX_SHELL + else + POSIX_SHELL= + PREFERABLY_POSIX_SHELL=/bin/sh + fi + AC_SUBST([POSIX_SHELL]) + AC_SUBST([PREFERABLY_POSIX_SHELL]) +])
new file mode 100644 --- /dev/null +++ b/modules/posix-shell @@ -0,0 +1,30 @@ +Description: +Find a POSIX-conforming shell. + +Files: +m4/posix-shell.m4 + +Depends-on: + +configure.ac: +gl_POSIX_SHELL + +Makefile.am: +##Sample usage of posix-shell module: +#script: script.in +# rm -f $@-t $@ +# sed -e 's#@''PREFERABLY_POSIX_SHELL''@#$(PREFERABLY_POSIX_SHELL)#g' \ +# -e 's#@''POSIX_SHELL''@#$(POSIX_SHELL)#g' \ +# -e $(srcdir)/$@.in >$@-t +# chmod a+x $@-t +# mv $@-t $@ +#EXTRA_DIST += script.in +#MOSTLYCLEANFILES += script script-t + +Include: + +License: +GPL + +Maintainer: +Paul Eggert