https://sourceware.org/bugzilla/show_bug.cgi?id=28106
Bug ID: 28106
Summary: Build of 2.37 fails on FreeBSD and Clang
Product: binutils
Version: 2.37
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: gold
Assignee: ccoutant at gmail dot com
Reporter: yasu at utahime dot org
CC: ian at airs dot com
Target Milestone: ---
OS: FreeBSD 13.0-RELEASE amd64
Compiler: Clang 11.0.1 (system compiler)
Build of 2.37 fails as following.
----------------------------------------------------------------------------------------------------
c++ -DHAVE_CONFIG_H -I. -I. -I./../include -I./../elfcpp
-DLOCALEDIR="\"/usr/local/share/locale\"" -DBINDIR="\"/usr/local/bin\""
-DTOOLBINDIR="\"/usr/local/x86_64-portbld-freebsd13.0/bin\""
-DTOOLLIBDIR="\"/usr/local/x86_64-portbld-freebsd13.0/lib\"" -isystem
/usr/local/include -W -Wall -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64
-frandom-seed=gc.o -pthread -O2 -pipe -fstack-protector-strong -isystem
/usr/local/include -fno-strict-aliasing -Wno-c++11-narrowing -isystem
/usr/local/include -MT gc.o -MD -MP -MF .deps/gc.Tpo -c -o gc.o gc.cc
In file included from gc.cc:26:
./gc.h:250:34: error: reinterpret_cast from 'nullptr_t' to 'gold::Relobj *' is
not allowed
(*secvec).push_back(Section_id(reinterpret_cast<Relobj*>(NULL),
0));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./gc.h:332:34: error: reinterpret_cast from 'nullptr_t' to 'gold::Relobj *' is
not allowed
(*secvec).push_back(Section_id(reinterpret_cast<Relobj*>(NULL),
0));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2 errors generated.
gmake[5]: *** [Makefile:1134: gc.o] Error 1
----------------------------------------------------------------------------------------------------
If I revert following commit in binutils-2_37-branch of git repository, then
build completes successfully.
----------------------------------------------------------------------------------------------------
commit 5d7f11f0e76
Author: Alan Modra <amo...@gmail.com>
Date: Tue May 25 14:36:49 2021
[GOLD] PR27815, gold fails to build with latest GCC
Don't use nullptr, it requires -std=c++11 on versions of gcc prior to
6.1. It would be possible to arrange to pass -std=c++11 automatically
when required (top level configure does that for gcc builds) but that
seems overkill and since we're not up-to-date on the top level config
files would mean someone would need to sync those over.
PR gold/27815
* gc.h (gc_process_relocs): Use cast in Section_id constructor.
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