Le 23/02/2020 à 00:33, Tadeus Prastowo via lfs-dev a écrit : > On Sat, Feb 22, 2020 at 11:10 PM Pierre Labastie via lfs-dev > <lfs-dev@lists.linuxfromscratch.org> wrote: >> >> Le 22/02/2020 à 18:33, Tadeus Prastowo via lfs-dev a écrit : >>> On Sat, Feb 22, 2020 at 6:17 PM Douglas R. Reno via lfs-dev >>> <lfs-dev@lists.linuxfromscratch.org> wrote: >>>> If we're going off an 'svn blame', it was done at r10226. That would've >>>> been GCC-4.8.0: >>>> >>>> http://wiki.linuxfromscratch.org/lfs/browser/trunk/BOOK/chapter05/libstdc%2B%2B.xml?annotate=blame >>> >>> Thank you very much for the pointer. I see that the change was >>> committed by Pierre. >> >> I'm almost sure the option was needed at the time. gcc-4.8.0 was the first >> gcc >> to be written in C++, hence the need for adding C++ support in pass1. > > I think the `--disable-libstdcxx-threads' option was not needed even > at that time. In other words, I am sure that the option was included > in the book without a failing build to support the use of the option > (perhaps the option was included just because its name includes the > word `threads').
I'm sure I included that because the build was failing. But I remember I've been working with svn versions of gcc before 4.8 was released. So it is possible I have not tested that it was still needed for 4.8. In any case, there is now code in libstdc++ configure script to test whether threads are available, and it automatically disables threads if they are not available. I think we could completely remove the option: this libstdc++ is only used for building gcc-pass2, so possibly changing it has no relevance to other parts of the book, if gcc-pass2 builds successfully. BUt Since lfs is frozen, I'll only change the text. Pierre -- http://lists.linuxfromscratch.org/listinfo/lfs-dev FAQ: http://www.linuxfromscratch.org/faq/ Unsubscribe: See the above information page
