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61 lines
2.1 KiB
Diff
61 lines
2.1 KiB
Diff
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From ef327a7c2a36b63e8a372bef88e3700460b51c34 Mon Sep 17 00:00:00 2001
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From: Keith Packard <keithp@keithp.com>
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Date: Sat, 11 Feb 2023 23:07:08 -0800
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Subject: [PATCH] gcc: Allow g++ to work differently from gcc
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Compile gcc.cc with -DIN_GPP defined when building g++ so that the
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code can respond appropriately for the default target language. This
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allows the driver to customize the specs used, selecting different
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linker scripts, adjusting the use of crtbegin.o/crtend.o etc.
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By default, this change has no effect; targets need to explicitly
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check for IN_GPP to have alternate behavior.
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Signed-off-by: Keith Packard <keithp@keithp.com>
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---
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gcc/cp/Make-lang.in | 7 ++++++-
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gcc/gpp.cc | 21 +++++++++++++++++++++
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2 files changed, 27 insertions(+), 1 deletion(-)
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create mode 100644 gcc/gpp.cc
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--- a/gcc/cp/Make-lang.in
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+++ b/gcc/cp/Make-lang.in
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@@ -77,7 +77,12 @@
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endif
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# Create the compiler driver for g++.
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-GXX_OBJS = $(GCC_OBJS) cp/g++spec.o
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+GXX_OBJS = $(GCC_OBJS:gcc.o=gpp.o) cp/g++spec.o
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+
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+CFLAGS-gpp.o = $(CFLAGS-gcc.o)
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+gpp.o: $(BASEVER)
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+gpp.o: gcc.o
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+
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xg++$(exeext): $(GXX_OBJS) $(EXTRA_GCC_OBJS) libcommon-target.a $(LIBDEPS)
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+$(LINKER) $(ALL_LINKERFLAGS) $(LDFLAGS) -o $@ \
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$(GXX_OBJS) $(EXTRA_GCC_OBJS) libcommon-target.a \
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--- /dev/null
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+++ b/gcc/gpp.cc
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@@ -0,0 +1,21 @@
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+/* Compiler driver program that can handle many languages.
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+ Copyright (C) 1987-2022 Free Software Foundation, Inc.
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+
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+This file is part of GCC.
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+
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+GCC is free software; you can redistribute it and/or modify it under
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+the terms of the GNU General Public License as published by the Free
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+Software Foundation; either version 3, or (at your option) any later
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+version.
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+
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+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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+WARRANTY; without even the implied warranty of MERCHANTABILITY or
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+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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+for more details.
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+
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+You should have received a copy of the GNU General Public License
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+along with GCC; see the file COPYING3. If not see
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+<http://www.gnu.org/licenses/>. */
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+
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+#define IN_GPP
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+#include "gcc.cc"
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