config root man

; Options for the S/390 / zSeries port of the compiler.

; Copyright (C) 2005, 2006 Free Software Foundation, Inc.
;
; This file is part of GCC.
;
; GCC is free software; you can redistribute it and/or modify it under
; the terms of the GNU General Public License as published by the Free
; Software Foundation; either version 2, or (at your option) any later
; version.
;
; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
; WARRANTY; without even the implied warranty of MERCHANTABILITY or
; FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
; for more details.
;
; You should have received a copy of the GNU General Public License
; along with GCC; see the file COPYING.  If not, write to the Free
; Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
; 02110-1301, USA.

m31
Target Report RejectNegative InverseMask(64BIT)
31 bit ABI

m64
Target Report RejectNegative Mask(64BIT)
64 bit ABI

march=
Target RejectNegative Joined Var(s390_arch_string)
Generate code for given CPU

mbackchain
Target Report Mask(BACKCHAIN)
Maintain backchain pointer

mdebug
Target Report Mask(DEBUG_ARG)
Additional debug prints

mesa
Target Report RejectNegative InverseMask(ZARCH)
ESA/390 architecture

mfused-madd
Target Report Mask(FUSED_MADD)
Enable fused multiply/add instructions

mhard-float
Target Report RejectNegative Mask(HARD_FLOAT)
Use hardware fp

mlong-double-128
Target Report RejectNegative Mask(LONG_DOUBLE_128)
Use 128-bit long double

mlong-double-64
Target Report RejectNegative InverseMask(LONG_DOUBLE_128)
Use 64-bit long double

mpacked-stack
Target Report Mask(PACKED_STACK)
Use packed stack layout

msmall-exec
Target Report Mask(SMALL_EXEC)
Use bras for executable < 64k

msoft-float
Target Report RejectNegative InverseMask(HARD_FLOAT, SOFT_FLOAT)
Don't use hardware fp

mstack-guard=
Target RejectNegative Joined
Set the max. number of bytes which has to be left to stack size before a trap instruction is triggered

mstack-size=
Target RejectNegative Joined
Emit extra code in the function prologue in order to trap if the stack size exceeds the given limit

mtune=
Target RejectNegative Joined
Schedule code for given CPU

mmvcle
Target Report Mask(MVCLE)
mvcle use

mwarn-dynamicstack
Target RejectNegative Var(s390_warn_dynamicstack_p)
Warn if a function uses alloca or creates an array with dynamic size

mwarn-framesize=
Target RejectNegative Joined
Warn if a single function's framesize exceeds the given framesize

mzarch
Target Report RejectNegative Mask(ZARCH)
z/Architecture