mirror of
https://git.proxmox.com/git/grub2
synced 2025-10-31 17:00:20 +00:00
48 lines
2.1 KiB
Plaintext
48 lines
2.1 KiB
Plaintext
# warn-on-use.m4 serial 5
|
|
dnl Copyright (C) 2010-2013 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.
|
|
|
|
# gl_WARN_ON_USE_PREPARE(INCLUDES, NAMES)
|
|
# ---------------------------------------
|
|
# For each whitespace-separated element in the list of NAMES, define
|
|
# HAVE_RAW_DECL_name if the function has a declaration among INCLUDES
|
|
# even after being undefined as a macro.
|
|
#
|
|
# See warn-on-use.h for some hints on how to poison function names, as
|
|
# well as ideas on poisoning global variables and macros. NAMES may
|
|
# include global variables, but remember that only functions work with
|
|
# _GL_WARN_ON_USE. Typically, INCLUDES only needs to list a single
|
|
# header, but if the replacement header pulls in other headers because
|
|
# some systems declare functions in the wrong header, then INCLUDES
|
|
# should do likewise.
|
|
#
|
|
# It is generally safe to assume declarations for functions declared
|
|
# in the intersection of C89 and C11 (such as printf) without
|
|
# needing gl_WARN_ON_USE_PREPARE.
|
|
AC_DEFUN([gl_WARN_ON_USE_PREPARE],
|
|
[
|
|
m4_foreach_w([gl_decl], [$2],
|
|
[AH_TEMPLATE([HAVE_RAW_DECL_]AS_TR_CPP(m4_defn([gl_decl])),
|
|
[Define to 1 if ]m4_defn([gl_decl])[ is declared even after
|
|
undefining macros.])])dnl
|
|
dnl FIXME: gl_Symbol must be used unquoted until we can assume
|
|
dnl autoconf 2.64 or newer.
|
|
for gl_func in m4_flatten([$2]); do
|
|
AS_VAR_PUSHDEF([gl_Symbol], [gl_cv_have_raw_decl_$gl_func])dnl
|
|
AC_CACHE_CHECK([whether $gl_func is declared without a macro],
|
|
gl_Symbol,
|
|
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([$1],
|
|
[@%:@undef $gl_func
|
|
(void) $gl_func;])],
|
|
[AS_VAR_SET(gl_Symbol, [yes])], [AS_VAR_SET(gl_Symbol, [no])])])
|
|
AS_VAR_IF(gl_Symbol, [yes],
|
|
[AC_DEFINE_UNQUOTED(AS_TR_CPP([HAVE_RAW_DECL_$gl_func]), [1])
|
|
dnl shortcut - if the raw declaration exists, then set a cache
|
|
dnl variable to allow skipping any later AC_CHECK_DECL efforts
|
|
eval ac_cv_have_decl_$gl_func=yes])
|
|
AS_VAR_POPDEF([gl_Symbol])dnl
|
|
done
|
|
])
|