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-rw-r--r--m4/wmempcpy.m421
1 files changed, 21 insertions, 0 deletions
diff --git a/m4/wmempcpy.m4 b/m4/wmempcpy.m4
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+++ b/m4/wmempcpy.m4
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+# wmempcpy.m4 serial 1
+dnl Copyright (C) 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.
+
+AC_DEFUN([gl_FUNC_WMEMPCPY],
+[
+ AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+
+ dnl Persuade glibc <wchar.h> to declare wmempcpy().
+ AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+ dnl The wmempcpy() declaration in lib/wchar.in.h uses 'restrict'.
+ AC_REQUIRE([AC_C_RESTRICT])
+
+ AC_CHECK_FUNCS_ONCE([wmempcpy])
+ if test $ac_cv_func_wmempcpy = no; then
+ HAVE_WMEMPCPY=0
+ fi
+])