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Re: [patch] Default to --enable-libstdcxx-time=auto
- From: Benjamin De Kosnik <bkoz at redhat dot com>
- To: Rainer Orth <ro at CeBiTec dot Uni-Bielefeld dot DE>
- Cc: Jonathan Wakely <jwakely dot gcc at gmail dot com>, "libstdc++" <libstdc++ at gcc dot gnu dot org>, gcc-patches <gcc-patches at gcc dot gnu dot org>
- Date: Fri, 24 May 2013 13:23:04 -0700
- Subject: Re: [patch] Default to --enable-libstdcxx-time=auto
- References: <CAH6eHdTgTspzbfHhD3uDwDVD3uXAapb_NMZ0jAZ-4-UjfD4H4g at mail dot gmail dot com> <yddip2brtxf dot fsf at lokon dot CeBiTec dot Uni-Bielefeld dot DE> <yddwqqqqaei dot fsf at lokon dot CeBiTec dot Uni-Bielefeld dot DE>
>> I get the
> > following testsuite regressions on Solaris 10/x86:
> > FAIL: 30_threads/async/54297.cc (test for excess errors)
> > WARNING: 30_threads/async/54297.cc compilation failed to produce
> > executable FAIL: 30_threads/condition_variable_any/53830.cc (test
> > for excess errors) WARNING:
> > 30_threads/condition_variable_any/53830.cc compilation failed to
> > produ e executable FAIL: 30_threads/this_thread/3.cc (test for
> > excess errors) WARNING: 30_threads/this_thread/3.cc compilation
> > failed to produce executable FAIL: 30_threads/this_thread/4.cc
> > (test for excess errors) WARNING: 30_threads/this_thread/4.cc
> > compilation failed to produce executable FAIL:
> > 30_threads/thread/native_handle/cancel.cc (test for excess errors)
> > WARNING: 30_threads/thread/native_handle/cancel.cc compilation
> > failed to produc e executable
> > All of them have the same root cause:
> > Excess errors:
> > Undefined first referenced
> > symbol in file
> > nanosleep /var/tmp//ccQhmiwd.o (symbol
> > belongs to implicit dependency /lib/librt.so.1) ld: fatal: symbol
> > referencing errors. No output written to ./54297.exe collect2:
> > error: ld returned 1 exit status
> > It seems that now every single C++ program needs to be linked with
> > -lrt, not only libstdc++.so. This will also happen on Solaris 9
> > (bootstrap still running), while on Solaris 11 nanosleep and the
> > others were integrated into libc.so.1.
So you'll need conditional LDFLAGS for solaris 9 and 10 only?
> > Speaking of Solaris 9, there's another caveat: unlike Solaris 10
> > and up, CLOCK_MONOTONIC isn't defined, while the equivalent
> > non-standard CLOCK_HIGHRES is. Instead of handling this in
> > libstdc++-v3/src/c++11/chrono.cc directly, I've chosen the following
> > route which allows libstdc++ to build on Solaris 9:
> > 2013-05-22 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
> > * config/os/solaris/solaris2.9/os_defines.h
> > [!CLOCK_MONOTONIC] (CLOCK_MONOTONIC): Define.
> The Solaris 9 (i386-pc-solaris2.9) bootstrap has now completed
> successfully, so the patch above seems to be sound. Ok for mainline?
This is ok.Thanks!