Hello Dimitry;
----- Messaggio originale ----- > Da: Dimitry Andric > I had a bit more in-depth look at our current libstdc++ configuration. > > I took the original gcc 4.2.1 release tarball, modified a few autoconf > related scripts to cope with "freebsd10.0" being the current version, > and did a full three-stage build, though only targeting C and C++. > > The libstdc++ configure script in 4.2.1 does detect a few new features > that are not in our shipping config.h, but is does not detect any > different settings regarding C99. > Not sure if libstdc++ from gcc42 sets --enable-c99 by default. > The reason it does not turn on _GLIBCXX_USE_C99, is that not all of the > C99 requirements are met, specifically <complex.h> checks fail: > > checking for ISO C99 support in <math.h>... yes > checking for ISO C99 support in <complex.h>... no > checking for ISO C99 support in <stdio.h>... yes > checking for ISO C99 support in <stdlib.h>... yes > checking for ISO C99 support in <wchar.h>... yes > checking for fully enabled ISO C99 support... no > > The exact failure testcase goes like this: > > configure:7435: checking for ISO C99 support in <complex.h> > configure:7492: /home/dim/obj/gcc-4.2.1/./gcc/xgcc -shared-libgcc > -B/home/dim/obj/gcc-4.2.1/./gcc -nostdinc++ > -L/home/dim/obj/gcc-4.2.1/i386-unknown-freebsd10.0/libstdc++-v3/src > -L/home/dim/obj/gcc-4.2.1/i386-unknown-freebsd10.0/libstdc++-v3/src/.libs > -B/home/dim/ins/gcc-4.2.1/i386-unknown-freebsd10.0/bin/ > -B/home/dim/ins/gcc-4.2.1/i386-unknown-freebsd10.0/lib/ -isystem > /home/dim/ins/gcc-4.2.1/i386-unknown-freebsd10.0/include -isystem > /home/dim/ins/gcc-4.2.1/i386-unknown-freebsd10.0/sys-include -c -g -O2 > conftest.cc >&5 > conftest.cc: In function 'int main()': > conftest.cc:41: error: 'clogf' was not declared in this scope > conftest.cc:47: error: 'cpowf' was not declared in this scope > conftest.cc:54: error: 'clog' was not declared in this scope > conftest.cc:60: error: 'cpow' was not declared in this scope > conftest.cc:64: error: 'ccosl' was not declared in this scope > conftest.cc:65: error: 'ccoshl' was not declared in this scope > conftest.cc:66: error: 'cexpl' was not declared in this scope > conftest.cc:67: error: 'clogl' was not declared in this scope > conftest.cc:68: error: 'csinl' was not declared in this scope > conftest.cc:69: error: 'csinhl' was not declared in this scope > conftest.cc:71: error: 'ctanl' was not declared in this scope > conftest.cc:72: error: 'ctanhl' was not declared in this scope > conftest.cc:73: error: 'cpowl' was not declared in this scope > configure:7498: $? = 1 > Those are surely in this list: https://wiki.freebsd.org/MissingMathStuff I think we are using stubs for libc++. > So until we actually implement and declare those functions, we should > probably not enable _GLIBCXX_USE_C99_COMPLEX and _GLIBCXX_USE_C99. > > I have attached a diff of the other changes that can be applied on our > current libstdc++ config file, as detected by the configure script. I > will probably commit that soonish, if there are no objections. > Thanks, that looks useful. Of course if GLIBCXX_USE_C99 didn't necessarily imply _GLIBCXX_USE_C99_COMPLEX it would be useful too. > As to the missing complex functions, I am not sure. Maybe these can be > imported from somewhere else, e.g. NetBSD? This is probably something > to ask the lib/msun specialists... > There is a freebsd-numerics list for people working on it. I am using the C++ complex stuff from boost and there were recent fixes done by Stephen Montgomery-Smith (CC'd) and it looks like he has a FreeBSD implementation in the works. I will open a PR as a reminder ;). cheers, Pedro. _______________________________________________ freebsd-toolchain@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-toolchain To unsubscribe, send any mail to "freebsd-toolchain-unsubscr...@freebsd.org"
