diff options
Diffstat (limited to 'm4/00gnulib.m4')
| -rw-r--r-- | m4/00gnulib.m4 | 38 |
1 files changed, 3 insertions, 35 deletions
diff --git a/m4/00gnulib.m4 b/m4/00gnulib.m4 index 06eff4f3863..14628c363b7 100644 --- a/m4/00gnulib.m4 +++ b/m4/00gnulib.m4 @@ -1,44 +1,12 @@ -# 00gnulib.m4 serial 7 +# 00gnulib.m4 serial 8 dnl Copyright (C) 2009-2020 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 This file must be named something that sorts before all other -dnl gnulib-provided .m4 files. The first part is needed until such time -dnl as we can assume Autoconf 2.64, with its improved AC_DEFUN_ONCE and -dnl m4_divert semantics. The second part is needed until the clang fix -dnl has been included in Autoconf. - -# Until autoconf 2.63, handling of the diversion stack required m4_init -# to be called first; but this does not happen with aclocal. Wrapping -# the entire execution in another layer of the diversion stack fixes this. -# Worse, prior to autoconf 2.62, m4_wrap depended on the underlying m4 -# for whether it was FIFO or LIFO; in order to properly balance with -# m4_init, we need to undo our push just before anything wrapped within -# the m4_init body. The way to ensure this is to wrap both sides of -# m4_init with a one-shot macro that does the pop at the right time. -m4_ifndef([_m4_divert_diversion], -[m4_divert_push([KILL]) -m4_define([gl_divert_fixup], [m4_divert_pop()m4_define([$0])]) -m4_define([m4_init], - [gl_divert_fixup()]m4_defn([m4_init])[gl_divert_fixup()])]) - - -# AC_DEFUN_ONCE([NAME], VALUE) -# ---------------------------- -# Define NAME to expand to VALUE on the first use (whether by direct -# expansion, or by AC_REQUIRE), and to nothing on all subsequent uses. -# Avoid bugs in AC_REQUIRE in Autoconf 2.63 and earlier. This -# definition is slower than the version in Autoconf 2.64, because it -# can only use interfaces that existed since 2.59; but it achieves the -# same effect. Quoting is necessary to avoid confusing Automake. -m4_version_prereq([2.63.263], [], -[m4_define([AC][_DEFUN_ONCE], - [AC][_DEFUN([$1], - [AC_REQUIRE([_gl_DEFUN_ONCE([$1])], - [m4_indir([_gl_DEFUN_ONCE([$1])])])])]dnl -[AC][_DEFUN([_gl_DEFUN_ONCE([$1])], [$2])])]) +dnl gnulib-provided .m4 files. It is needed until the clang fix has +dnl been included in Autoconf. # The following definitions arrange to use a compiler option # -Werror=implicit-function-declaration in AC_CHECK_DECL, when the |