[PATCH] D14165: [lld] Ensure we link to the threading library used by std::thread (e.g. pthreads).
Daniel Sanders via llvm-commits
llvm-commits at lists.llvm.org
Thu Nov 5 01:54:00 PST 2015
It's the libstdc++-4.9-dev in Debian Jessie (amd64). The package version is 4.9.2-10.
From: Rafael Espíndola [rafael.espindola at gmail.com]
Sent: 04 November 2015 13:02
To: reviews+D14165+public+8a648fa84ee244b3 at reviews.llvm.org; Daniel Sanders
Cc: Rui Ueyama; llvm-commits
Subject: Re: [PATCH] D14165: [lld] Ensure we link to the threading library used by std::thread (e.g. pthreads).
Which C++ library is that? On my system (gcc 4.9) running
grep -r '&pthread_create' /usr/include/c++/
And in the preprocessed file:
$ grep pthread_create SymbolTable.ii
extern int pthread_create (pthread_t *__restrict __newthread,
static __typeof(pthread_create) __gthrw_pthread_create __attribute__
return __gthrw_pthread_create (__threadid, __null, __func, __args);
On 30 October 2015 at 03:28, Daniel Sanders via llvm-commits
<llvm-commits at lists.llvm.org> wrote:
> dsanders added a comment.
> FWIW, it seems odd that we'd need pthreads when we don't use threads. I've just had a look at the preprocessed source for COFF/SymbolTable.cpp and the pthread_create reference comes from this line:
> __asm ("" : : "r" (&pthread_create));
> which was in the <thread> that was included by <future>.
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