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5071149e89
When building on GNU/Hurd warnings like the following occur:
../sysdeps/x86_64/multiarch/strnlen-evex-base.S:53:10: warning: "P2ALIGN" redefined
53 | # define P2ALIGN(...) .p2align 4,, 6
| ^~~~~~~
In file included from /usr/include/x86_64-gnu/mach/x86_64/syscall_sw.h:30,
from ../sysdeps/mach/sysdep.h:21,
from ../sysdeps/mach/x86/sysdep.h:31,
from ../sysdeps/x86_64/multiarch/strnlen-evex-base.S:24:
/usr/include/x86_64-gnu/mach/x86_64/asm.h:78:9: note: this is the location of the previous definition
78 | #define P2ALIGN(p2) .p2align p2 /* gas-specific */
| ^~~~~~~
The fix is to undefine the macro from system headers in sysdep.h so that
it can be properly defined in assembly files where its definition
depends on whether string functions are being compiled for
wide-characters or not.
Message-ID: <721cd3a1bae1a553857db1dd69761a175f611364.1750131904.git.collin.funk1@gmail.com>
78 lines
2.6 KiB
C++
78 lines
2.6 KiB
C++
/* Copyright (C) 1994-2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifdef __ASSEMBLER__
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/* Get the Mach definitions of ENTRY and kernel_trap. */
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#include <mach/machine/syscall_sw.h>
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/* This macro is defined in Mach system headers, but string functions use it
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with different definitions depending on whether being compiled for
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wide-characters or not. */
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#undef P2ALIGN
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/* The Mach definitions assume underscores should be prepended to
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symbol names. Redefine them to do so only when appropriate. */
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#undef EXT
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#undef LEXT
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#define EXT(x) C_SYMBOL_NAME(x)
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#define LEXT(x) C_SYMBOL_NAME(x##:)
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/* For ELF we need to add the `.type' directive to make shared libraries
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work right. */
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#undef ENTRY
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#undef ENTRY2
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#define ENTRY(name) \
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.globl name; \
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.align ALIGN; \
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.type name,@function; \
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name:
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#endif
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/* This is invoked by things run when there is random lossage, before they
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try to do anything else. Just to be safe, deallocate the reply port so
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bogons arriving on it don't foul up future RPCs. */
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#ifndef __ASSEMBLER__
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#define FATAL_PREPARE_INCLUDE <mach/mig_support.h>
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#define FATAL_PREPARE __mig_dealloc_reply_port (__mig_get_reply_port ())
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#endif
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/* sysdeps/mach/MACHINE/sysdep.h should define the following macros. */
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/* Produce a text assembler label for the C global symbol NAME. */
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#ifndef ENTRY
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#define ENTRY(name) .error ENTRY not defined by sysdeps/mach/MACHINE/sysdep.h
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/* This is not used on all machines. */
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#endif
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/* LOSE can be defined as the `halt' instruction or something
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similar which will cause the process to die in a characteristic
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way suggesting a bug. */
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#ifndef LOSE
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#define LOSE ({ volatile int zero = 0; zero / zero; })
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#endif
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/* One of these should be defined to specify the stack direction. */
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#if !defined (STACK_GROWTH_UP) && !defined (STACK_GROWTH_DOWN)
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#error stack direction unspecified
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#endif
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/* Used by some assembly code. */
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#define C_SYMBOL_NAME(name) name
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