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gcc: Fix cross-canadian builds wih GCC11

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With this we may finally build Windows and "native" toolchains
if host tools are also GCC11 based. For example:

1. You build cross toolchain with all the recent components by CT-NG
2. You build cross-canadian toolchain for Windows or ARC, ARMm whatever board

See upstream bug report [1] for more details.

Basically when we do cross-canadian build with
use of the same GCC11 as a "host" compiler we're seeing
an error like that:
------------------->8-------------------
mingw-w64-cross/gcc/x86_64-w64-mingw32/libstdc++-v3/include/fenv.h:58:11: error: 'fenv_t' has not been declared in '::'
   58 |   using ::fenv_t;
------------------->8-------------------

This is a solution proposed by Yujie Yang in [2]
Note, though it's not the final fix merged upstream, that's just
an attempt to fix this by casual GCC users. There's a hope it
will be fixed anyways a bit later, maybe by the time of GCC 11.3...

[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100017
[2] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100017#c20

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
This commit is contained in:
Alexey Brodkin 2021-09-15 01:17:15 -07:00
parent 24a1f120d7
commit 9ddd4b7883
1 changed files with 47 additions and 0 deletions
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47
packages/gcc/11.2.0/0005-Fix-cross-native-cross-caandian-builds.patch vendored Normal file
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@ -0,0 +1,47 @@
From 7f13ba28a4aac454ada29552acdf9a44697ad5a8 Mon Sep 17 00:00:00 2001
From: Alexey Brodkin <abrodkin@synopsys.com>
Date: Wed, 15 Sep 2021 01:08:06 -0700
Subject: [PATCH] Fix cross-native/cross-caandian builds
See upstream bug report [1] for more details.
Basically when we do cross-canadian build with
use of the same GCC11 as a "host" compiler we're seeing
an error like that:
------------------->8-------------------
mingw-w64-cross/gcc/x86_64-w64-mingw32/libstdc++-v3/include/fenv.h:58:11: error: 'fenv_t' has not been declared in '::'
58 | using ::fenv_t;
------------------->8-------------------
This is a solution proposed by Yujie Yang in [2]
[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100017
[2] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100017#c20
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
---
configure | 2 +-
configure.ac | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
--- a/configure
+++ b/configure
@@ -16478,7 +16478,7 @@
fi
-RAW_CXX_FOR_TARGET="$CXX_FOR_TARGET"
+RAW_CXX_FOR_TARGET="$CXX_FOR_TARGET -nostdinc++"
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking where to find the target ar" >&5
$as_echo_n "checking where to find the target ar... " >&6; }
--- a/configure.ac
+++ b/configure.ac
@@ -3520,7 +3520,7 @@
ACX_CHECK_INSTALLED_TARGET_TOOL(WINDRES_FOR_TARGET, windres)
ACX_CHECK_INSTALLED_TARGET_TOOL(WINDMC_FOR_TARGET, windmc)
-RAW_CXX_FOR_TARGET="$CXX_FOR_TARGET"
+RAW_CXX_FOR_TARGET="$CXX_FOR_TARGET -nostdinc++"
GCC_TARGET_TOOL(ar, AR_FOR_TARGET, AR, [binutils/ar])
GCC_TARGET_TOOL(as, AS_FOR_TARGET, AS, [gas/as-new])