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-rw-r--r--m4/warn-on-use.m447
1 files changed, 0 insertions, 47 deletions
diff --git a/m4/warn-on-use.m4 b/m4/warn-on-use.m4
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--- a/m4/warn-on-use.m4
+++ /dev/null
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-# warn-on-use.m4 serial 5
-dnl Copyright (C) 2010-2012 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
-])