Mercurial > gnulib
view m4/warnings.m4 @ 36940:c741bc27922a
maint: update all copyright year number ranges
Run "make update-copyright". Compare to commit 1602f0a from last year.
Signed-off-by: Eric Blake <eblake@redhat.com>
author | Eric Blake <eblake@redhat.com> |
---|---|
date | Tue, 01 Jan 2013 00:50:58 +0000 |
parents | f2b53e41979b |
children | 7afa5abee433 |
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# warnings.m4 serial 7 dnl Copyright (C) 2008-2013 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. dnl From Simon Josefsson # gl_AS_VAR_APPEND(VAR, VALUE) # ---------------------------- # Provide the functionality of AS_VAR_APPEND if Autoconf does not have it. m4_ifdef([AS_VAR_APPEND], [m4_copy([AS_VAR_APPEND], [gl_AS_VAR_APPEND])], [m4_define([gl_AS_VAR_APPEND], [AS_VAR_SET([$1], [AS_VAR_GET([$1])$2])])]) # gl_COMPILER_OPTION_IF(OPTION, [IF-SUPPORTED], [IF-NOT-SUPPORTED], # [PROGRAM = AC_LANG_PROGRAM()]) # ----------------------------------------------------------------- # Check if the compiler supports OPTION when compiling PROGRAM. # # FIXME: gl_Warn must be used unquoted until we can assume Autoconf # 2.64 or newer. AC_DEFUN([gl_COMPILER_OPTION_IF], [AS_VAR_PUSHDEF([gl_Warn], [gl_cv_warn_[]_AC_LANG_ABBREV[]_$1])dnl AS_VAR_PUSHDEF([gl_Flags], [_AC_LANG_PREFIX[]FLAGS])dnl AC_CACHE_CHECK([whether _AC_LANG compiler handles $1], m4_defn([gl_Warn]), [ gl_save_compiler_FLAGS="$gl_Flags" gl_AS_VAR_APPEND(m4_defn([gl_Flags]), [" $1"]) AC_COMPILE_IFELSE([m4_default([$4], [AC_LANG_PROGRAM([])])], [AS_VAR_SET(gl_Warn, [yes])], [AS_VAR_SET(gl_Warn, [no])]) gl_Flags="$gl_save_compiler_FLAGS" ]) AS_VAR_IF(gl_Warn, [yes], [$2], [$3]) AS_VAR_POPDEF([gl_Flags])dnl AS_VAR_POPDEF([gl_Warn])dnl ]) # gl_WARN_ADD(OPTION, [VARIABLE = WARN_CFLAGS], # [PROGRAM = AC_LANG_PROGRAM()]) # --------------------------------------------- # Adds parameter to WARN_CFLAGS if the compiler supports it when # compiling PROGRAM. For example, gl_WARN_ADD([-Wparentheses]). # # If VARIABLE is a variable name, AC_SUBST it. AC_DEFUN([gl_WARN_ADD], [gl_COMPILER_OPTION_IF([$1], [gl_AS_VAR_APPEND(m4_if([$2], [], [[WARN_CFLAGS]], [[$2]]), [" $1"])], [], [$3]) m4_ifval([$2], [AS_LITERAL_IF([$2], [AC_SUBST([$2])])], [AC_SUBST([WARN_CFLAGS])])dnl ]) # Local Variables: # mode: autoconf # End: