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  • Committer: Package Import Robot
  • Author(s): Christoph Berg
  • Date: 2013-01-03 17:34:45 UTC
  • mto: (6.1.5 experimental)
  • mto: This revision was merged to the branch mainline in revision 12.
  • Revision ID: package-import@ubuntu.com-20130103173445-5vf8qmnfgd7ug67h
Tags: upstream-2.7.1
Import upstream version 2.7.1

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m4/warnings.m4
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# warnings.m4 serial 2
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dnl Copyright (C) 2008-2011 Free Software Foundation, Inc.
 
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# warnings.m4 serial 7
 
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dnl Copyright (C) 2008-2012 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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[m4_define([gl_AS_VAR_APPEND],
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[AS_VAR_SET([$1], [AS_VAR_GET([$1])$2])])])
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# gl_WARN_ADD(PARAMETER, [VARIABLE = WARN_CFLAGS])
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# ------------------------------------------------
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# Adds parameter to WARN_CFLAGS if the compiler supports it.  For example,
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# gl_WARN_ADD([-Wparentheses]).
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AC_DEFUN([gl_WARN_ADD],
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[AS_VAR_PUSHDEF([gl_Warn], [gl_cv_warn_$1])dnl
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AC_CACHE_CHECK([whether compiler handles $1], [gl_Warn], [
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  save_CPPFLAGS="$CPPFLAGS"
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  CPPFLAGS="${CPPFLAGS} $1"
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  AC_PREPROC_IFELSE([AC_LANG_PROGRAM([])],
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                    [AS_VAR_SET([gl_Warn], [yes])],
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                    [AS_VAR_SET([gl_Warn], [no])])
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  CPPFLAGS="$save_CPPFLAGS"
 
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# gl_COMPILER_OPTION_IF(OPTION, [IF-SUPPORTED], [IF-NOT-SUPPORTED],
 
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#                       [PROGRAM = AC_LANG_PROGRAM()])
 
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# -----------------------------------------------------------------
 
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# Check if the compiler supports OPTION when compiling PROGRAM.
 
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#
 
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# FIXME: gl_Warn must be used unquoted until we can assume Autoconf
 
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# 2.64 or newer.
 
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AC_DEFUN([gl_COMPILER_OPTION_IF],
 
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[AS_VAR_PUSHDEF([gl_Warn], [gl_cv_warn_[]_AC_LANG_ABBREV[]_$1])dnl
 
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AS_VAR_PUSHDEF([gl_Flags], [_AC_LANG_PREFIX[]FLAGS])dnl
 
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AC_CACHE_CHECK([whether _AC_LANG compiler handles $1], m4_defn([gl_Warn]), [
 
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  gl_save_compiler_FLAGS="$gl_Flags"
 
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  gl_AS_VAR_APPEND(m4_defn([gl_Flags]), [" $1"])
 
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  AC_COMPILE_IFELSE([m4_default([$4], [AC_LANG_PROGRAM([])])],
 
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                    [AS_VAR_SET(gl_Warn, [yes])],
 
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                    [AS_VAR_SET(gl_Warn, [no])])
 
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  gl_Flags="$gl_save_compiler_FLAGS"
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])
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AS_VAR_PUSHDEF([gl_Flags], m4_if([$2], [], [[WARN_CFLAGS]], [[$2]]))dnl
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AS_VAR_IF([gl_Warn], [yes], [gl_AS_VAR_APPEND([gl_Flags], [" $1"])])
 
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AS_VAR_IF(gl_Warn, [yes], [$2], [$3])
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AS_VAR_POPDEF([gl_Flags])dnl
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AS_VAR_POPDEF([gl_Warn])dnl
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m4_ifval([$2], [AS_LITERAL_IF([$2], [AC_SUBST([$2])], [])])dnl
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])
 
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])
 
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# gl_WARN_ADD(OPTION, [VARIABLE = WARN_CFLAGS],
 
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#             [PROGRAM = AC_LANG_PROGRAM()])
 
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# ---------------------------------------------
 
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# Adds parameter to WARN_CFLAGS if the compiler supports it when
 
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# compiling PROGRAM.  For example, gl_WARN_ADD([-Wparentheses]).
 
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#
 
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# If VARIABLE is a variable name, AC_SUBST it.
 
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AC_DEFUN([gl_WARN_ADD],
 
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[gl_COMPILER_OPTION_IF([$1],
 
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  [gl_AS_VAR_APPEND(m4_if([$2], [], [[WARN_CFLAGS]], [[$2]]), [" $1"])],
 
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  [],
 
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  [$3])
 
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m4_ifval([$2],
 
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         [AS_LITERAL_IF([$2], [AC_SUBST([$2])])],
 
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         [AC_SUBST([WARN_CFLAGS])])dnl
 
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])
 
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# Local Variables:
 
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# mode: autoconf
 
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# End: