[Bug libstdc++/42734] trivial use of std::thread fails with "pure virtual method called"

["damien.buhl at lecbna dot org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42734

--- Comment #47 from Damien Buhl (daminetreg) <damien.buhl at lecbna dot org> ---
So our GCC with the problemÂhas been configured and built by yocto-pokyÂthe
following way :Â  

```  
Using built-in specs.  
COLLECT_GCC=arm-poky-linux-gnueabi-gcc-4.8.1  
COLLECT_LTO_WRAPPER=/home/buhldam/workspace/as521/workspace_original/product-modulo5-automation-as521/tmp/sysroots/i686-linux/usr/libexec/armv7a-vfp-neon-poky-linux-gnueabi/gcc/arm-poky-linux-gnueabi/4.8.1/lto-wrapper 
Target: arm-poky-linux-gnueabi  
Configured with:
/home/buhldam/workspace/as521/workspace_original/product-modulo5-automation-as521/tmp/work-shared/gcc-4.8.1-r0/gcc-4.8.1/configure
--build=i686-linux --host=i686-linux --target=arm-poky-linux-gnueabi
--prefix=/home/buhldam/workspace/as521/workspace_original/product-modulo5-automation-as521/tmp/sysroots/i686-linux/usr
--exec_prefix=/home/buhldam/workspace/as521/workspace_original/product-modulo5-automation-as521/tmp/sysroots/i686-linux/usr
--bindir=/home/buhldam/workspace/as521/workspace_original/product-modulo5-automation-as521/tmp/sysroots/i686-linux/usr/bin/armv7a-vfp-neon-poky-linux-gnueabi
--sbindir=/home/buhldam/workspace/as521/workspace_original/product-modulo5-automation-as521/tmp/sysroots/i686-linux/usr/bin/armv7a-vfp-neon-poky-linux-gnueabi
--libexecdir=/home/buhldam/workspace/as521/workspace_original/product-modulo5-automation-as521/tmp/sysroots/i686-linux/usr/libexec/armv7a-vfp-neon-poky-linux-gnueabi
--datadir=/home/buhldam/workspace/as521/workspace_original/product-modulo5-automation-as521/tmp/sysroots/i686-linux/usr/share
--sysconfdir=/home/buhldam/workspace/as521/workspace_original/product-modulo5-automation-as521/tmp/sysroots/i686-linux/etc
--sharedstatedir=/home/buhldam/workspace/as521/workspace_original/product-modulo5-automation-as521/tmp/sysroots/i686-linux/com
--localstatedir=/home/buhldam/workspace/as521/workspace_original/product-modulo5-automation-as521/tmp/sysroots/i686-linux/var
--libdir=/home/buhldam/workspace/as521/workspace_original/product-modulo5-automation-as521/tmp/sysroots/i686-linux/usr/lib/armv7a-vfp-neon-poky-linux-gnueabi
--includedir=/home/buhldam/workspace/as521/workspace_original/product-modulo5-automation-as521/tmp/sysroots/i686-linux/usr/include
--oldincludedir=/home/buhldam/workspace/as521/workspace_original/product-modulo5-automation-as521/tmp/sysroots/i686-linux/usr/include
--infodir=/home/buhldam/workspace/as521/workspace_original/product-modulo5-automation-as521/tmp/sysroots/i686-linux/usr/share/info
--mandir=/home/buhldam/workspace/as521/workspace_original/product-modulo5-automation-as521/tmp/sysroots/i686-linux/usr/share/man
--disable-silent-rules --disable-dependency-tracking
--with-libtool-sysroot=/home/buhldam/workspace/as521/workspace_original/product-modulo5-automation-as521/tmp/sysroots/i686-linux
--enable-clocale=generic --with-gnu-ld --enable-shared --enable-languages=c,c++
--enable-threads=posix --disable-multilib --enable-c99 --enable-long-long
--enable-symvers=gnu --enable-libstdcxx-pch
--program-prefix=arm-poky-linux-gnueabi- --without-local-prefix
--enable-target-optspace --enable-lto --enable-libssp --disable-bootstrap
--disable-libmudflap --with-system-zlib --with-linker-hash-style=gnu
--enable-linker-build-id --with-ppl=no --with-cloog=no
--enable-checking=release --enable-cheaders=c_global
--with-gxx-include-dir=/home/buhldam/workspace/as521/workspace_original/product-modulo5-automation-as521/tmp/sysroots/ksp-0500/usr/include/c++
--with-sysroot=/home/buhldam/workspace/as521/workspace_original/product-modulo5-automation-as521/tmp/sysroots/ksp-0500
--with-build-sysroot=/home/buhldam/workspace/as521/workspace_original/product-modulo5-automation-as521/tmp/sysroots/ksp-0500
--enable-poison-system-directories --disable-libunwind-exceptions
--with-mpfr=/home/buhldam/workspace/as521/workspace_original/product-modulo5-automation-as521/tmp/sysroots/i686-linux/usr
--with-system-zlib --disable-nls  
Thread model: posix  
gcc version 4.8.1 (GCC)   
```  

We have now updated to 4.9.1, I'll tell you the bug still happens with 4.9.1.  

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42734 

 --- Comment #45 from Alexander Varnin  --- 
 (In reply to Damien Buhl (daminetreg) from comment #44) 

 While given test works properly with -latomic on my installation, my 
 application doesn't. It fails with segfault in approximately half of launches. 
 Core dump points to some thread execution code. I suppose, it is still broken 
 in some way. 

 Replacing std::thread in my code with pthread_* makes it work properly. 

 So I conclude, that this std::thread and atomic things is broken on my gcc 
 4.8.2 arm freescale imx53 yocto build. 

 --  
 You are receiving this mail because: 
 You are on the CC list for the bug.