mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-30 08:09:04 +00:00
53 lines
1.8 KiB
Plaintext
53 lines
1.8 KiB
Plaintext
# euidaccess.m4 serial 15
|
|
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.
|
|
|
|
AC_DEFUN([gl_FUNC_NONREENTRANT_EUIDACCESS],
|
|
[
|
|
AC_REQUIRE([gl_FUNC_EUIDACCESS])
|
|
AC_CHECK_DECLS([setregid])
|
|
AC_DEFINE([PREFER_NONREENTRANT_EUIDACCESS], [1],
|
|
[Define this if you prefer euidaccess to return the correct result
|
|
even if this would make it nonreentrant. Define this only if your
|
|
entire application is safe even if the uid or gid might temporarily
|
|
change. If your application uses signal handlers or threads it
|
|
is probably not safe.])
|
|
])
|
|
|
|
AC_DEFUN([gl_FUNC_EUIDACCESS],
|
|
[
|
|
AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
|
|
|
|
dnl Persuade glibc <unistd.h> to declare euidaccess().
|
|
AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
|
|
|
|
AC_CHECK_FUNCS([euidaccess])
|
|
if test $ac_cv_func_euidaccess = no; then
|
|
HAVE_EUIDACCESS=0
|
|
fi
|
|
])
|
|
|
|
# Prerequisites of lib/euidaccess.c.
|
|
AC_DEFUN([gl_PREREQ_EUIDACCESS], [
|
|
dnl Prefer POSIX faccessat over non-standard euidaccess.
|
|
AC_CHECK_FUNCS_ONCE([faccessat])
|
|
dnl Try various other non-standard fallbacks.
|
|
AC_CHECK_HEADERS([libgen.h])
|
|
AC_FUNC_GETGROUPS
|
|
|
|
# Solaris 9 and 10 need -lgen to get the eaccess function.
|
|
# Save and restore LIBS so -lgen isn't added to it. Otherwise, *all*
|
|
# programs in the package would end up linked with that potentially-shared
|
|
# library, inducing unnecessary run-time overhead.
|
|
LIB_EACCESS=
|
|
AC_SUBST([LIB_EACCESS])
|
|
gl_saved_libs=$LIBS
|
|
AC_SEARCH_LIBS([eaccess], [gen],
|
|
[test "$ac_cv_search_eaccess" = "none required" ||
|
|
LIB_EACCESS=$ac_cv_search_eaccess])
|
|
AC_CHECK_FUNCS([eaccess])
|
|
LIBS=$gl_saved_libs
|
|
])
|