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RedBear-OS/local/recipes/tools/diffutils/source/m4/putenv.m4
T
vasilito b8aac3c9bc D7: editor multi-cursor support
Add secondary_cursors field to Editor with insert_char_multi,
delete_back_multi, delete_forward_multi methods. Right-to-left
processing ensures position shifts don't corrupt earlier insertions.

7 new tests: add/clear, all_positions, insert, delete_back,
delete_forward, unicode, duplicate-add.
2026-07-05 22:29:19 +03:00

57 lines
1.6 KiB
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# putenv.m4 serial 20
dnl Copyright (C) 2002-2017 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
dnl From Jim Meyering.
dnl
dnl Check whether putenv ("FOO") removes FOO from the environment.
dnl The putenv in libc on at least SunOS 4.1.4 does *not* do that.
AC_DEFUN([gl_FUNC_PUTENV],
[
AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([for putenv compatible with GNU and SVID],
[gl_cv_func_svid_putenv],
[AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],[[
/* Put it in env. */
if (putenv ("CONFTEST_putenv=val"))
return 1;
/* Try to remove it. */
if (putenv ("CONFTEST_putenv"))
return 2;
/* Make sure it was deleted. */
if (getenv ("CONFTEST_putenv") != 0)
return 3;
return 0;
]])],
gl_cv_func_svid_putenv=yes,
gl_cv_func_svid_putenv=no,
dnl When crosscompiling, assume putenv is broken.
[case "$host_os" in
# Guess yes on glibc systems.
*-gnu*) gl_cv_func_svid_putenv="guessing yes" ;;
# If we don't know, assume the worst.
*) gl_cv_func_svid_putenv="guessing no" ;;
esac
])
])
case "$gl_cv_func_svid_putenv" in
*yes) ;;
*)
REPLACE_PUTENV=1
;;
esac
])
# Prerequisites of lib/putenv.c.
AC_DEFUN([gl_PREREQ_PUTENV],
[
AC_CHECK_DECLS([_putenv])
])