On Tue, 1 Dec 2020 at 19:13, Michael Meissner via Libstdc++
<libstd...@gcc.gnu.org> wrote:
>
> On Tue, Dec 01, 2020 at 04:04:30PM +0000, Jonathan Wakely wrote:
> > On 01/12/20 15:10 +0000, Jonathan Wakely wrote:
> > >On 30/11/20 16:30 -0500, Michael Meissner via Libstdc++ wrote:
> > >>Jonathan, could you send a fresh set of patches (or at least
> > >>replacements)? I
> > >>tried installing the patches on a master branch I checked out this
> > >>morning, and
> > >>I got two rejects:
> > >
> > >I don't understand why those chunks failed, but I'll rebase and send a
> > >new patch ASAP.
> >
> > Here's the rebased patch, with regenerated autoconf files and a fix
> > for the <ext/numeric_limits.h> header. I'd changed it since sending
> > the previous patch, and broke the "there's more than one long double"
> > case (i.e. the _GLIBCXX_LONG_DOUBLE_ALT128_COMPAT case).
>
> Unfortunately this patch DOES NOT work at all.
>
> If I build a compiler with the configure option:
> --with-long-double-format=ieee
>
> And I compile this simple program:
>
> #include <iostream>
>
> int main(int argc, char *argv[], char *envp[])
> {
> std::cout << "Hello World!\n";
> return 0;
> }
>
> I get all of these errors:
It works fine for me (see below). I think your symptoms are due to
using a glibc that doesn't support the new long double, and so
libstdc++ support for it is also disabled. You need at least glibc
2.32 for the libstdc++ changes to be enabled.
[test@ibm-p9b-30 build-ieee128]$ rpm -q glibc
glibc-2.32-2.fc33.ppc64le
[test@ibm-p9b-30 tmp]$ cat hello.C
#include <iostream>
int main(int argc, char *argv[], char *envp[])
{
std::cout << "Hello World!\n";
return 0;
}
[test@ibm-p9b-30 tmp]$ ~/gcc/ieee128/bin/g++ hello.C
-Wl,-rpath,$HOME/gcc/ieee128/lib64 -v
Using built-in specs.
COLLECT_GCC=/home/test/gcc/ieee128/bin/g++
COLLECT_LTO_WRAPPER=/home/test/gcc/ieee128/libexec/gcc/powerpc64le-unknown-linux-gnu/11.0.0/lto-wrapper
Target: powerpc64le-unknown-linux-gnu
Configured with: ../gcc/configure --prefix=/home/test/gcc/ieee128/
--enable-libstdcxx-debug --disable-bootstrap --disable-multilib
--disable-libvtv --with-system-zlib --without-isl
--with-long-double-format=ieee --enable-languages=c,c++ :
(reconfigured) ../gcc/configure --prefix=/home/test/gcc/ieee128/
--enable-libstdcxx-debug --disable-bootstrap --disable-multilib
--disable-libvtv --with-system-zlib --without-isl
--with-long-double-format=ieee --enable-languages=c,c++ :
(reconfigured) ../gcc/configure --prefix=/home/test/gcc/ieee128/
--enable-libstdcxx-debug --disable-bootstrap --disable-multilib
--disable-libvtv --with-system-zlib --without-isl
--with-long-double-format=ieee --enable-languages=c,c++,lto
--no-create --no-recursion
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 11.0.0 20201201 (experimental) (GCC)
COLLECT_GCC_OPTIONS='-v' '-shared-libgcc' '-dumpdir' 'a-'
/home/test/gcc/ieee128/libexec/gcc/powerpc64le-unknown-linux-gnu/11.0.0/cc1plus
-quiet -v -D_GNU_SOURCE hello.C -quiet -dumpdir a- -dumpbase hello.C
-dumpbase-ext .C -version -o /tmp/cc1OWZTT.s
GNU C++17 (GCC) version 11.0.0 20201201 (experimental)
(powerpc64le-unknown-linux-gnu)
compiled by GNU C version 10.2.1 20201016 (Red Hat 10.2.1-6),
GMP version 6.2.0, MPFR version 4.1.0, MPC version 1.1.0, isl version
none
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
ignoring nonexistent directory
"/home/test/gcc/ieee128/lib/gcc/powerpc64le-unknown-linux-gnu/11.0.0/../../../../powerpc64le-unknown-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/home/test/gcc/ieee128/lib/gcc/powerpc64le-unknown-linux-gnu/11.0.0/../../../../include/c++/11.0.0
/home/test/gcc/ieee128/lib/gcc/powerpc64le-unknown-linux-gnu/11.0.0/../../../../include/c++/11.0.0/powerpc64le-unknown-linux-gnu
/home/test/gcc/ieee128/lib/gcc/powerpc64le-unknown-linux-gnu/11.0.0/../../../../include/c++/11.0.0/backward
/home/test/gcc/ieee128/lib/gcc/powerpc64le-unknown-linux-gnu/11.0.0/include
/usr/local/include
/home/test/gcc/ieee128/include
/home/test/gcc/ieee128/lib/gcc/powerpc64le-unknown-linux-gnu/11.0.0/include-fixed
/usr/include
End of search list.
GNU C++17 (GCC) version 11.0.0 20201201 (experimental)
(powerpc64le-unknown-linux-gnu)
compiled by GNU C version 10.2.1 20201016 (Red Hat 10.2.1-6),
GMP version 6.2.0, MPFR version 4.1.0, MPC version 1.1.0, isl version
none
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 868967e3eb6523a59f0ddd7cc415f672
COLLECT_GCC_OPTIONS='-v' '-shared-libgcc' '-dumpdir' 'a-'
as -v -a64 -mpower8 -mlittle -o /tmp/ccpF549Q.o /tmp/cc1OWZTT.s
GNU assembler version 2.35 (ppc64le-redhat-linux) using BFD version
version 2.35-14.fc33
COMPILER_PATH=/home/test/gcc/ieee128/libexec/gcc/powerpc64le-unknown-linux-gnu/11.0.0/:/home/test/gcc/ieee128/libexec/gcc/powerpc64le-unknown-linux-gnu/11.0.0/:/home/test/gcc/ieee128/libexec/gcc/powerpc64le-unknown-linux-gnu/:/home/test/gcc/ieee128/lib/gcc/powerpc64le-unknown-linux-gnu/11.0.0/:/home/test/gcc/ieee128
/lib/gcc/powerpc64le-unknown-linux-gnu/
LIBRARY_PATH=/home/test/gcc/ieee128/lib/gcc/powerpc64le-unknown-linux-gnu/11.0.0/:/home/test/gcc/ieee128/lib/gcc/powerpc64le-unknown-linux-gnu/11.0.0/../../../../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/home/test/gcc/ieee128/lib/gcc/powerpc64le-unknown-linux-gnu/11.0.0/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-shared-libgcc' '-dumpdir' 'a.'
/home/test/gcc/ieee128/libexec/gcc/powerpc64le-unknown-linux-gnu/11.0.0/collect2
-plugin
/home/test/gcc/ieee128/libexec/gcc/powerpc64le-unknown-linux-gnu/11.0.0/liblto_plugin.so
-plugin-opt=/home/test/gcc/ieee128/libexec/gcc/powerpc64le-unknown-linux-gnu/11.0.0/lto-wrapper
-plugin-opt=-fresolution=/tmp/cc69gZwR.res
-plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lgcc
-plugin-opt=-pass-through=-lc -plugin-opt=-pass-through=-lgcc_s
-plugin-opt=-pass-through=-lgcc --eh-frame-hdr -V -m elf64lppc
-dynamic-linker /lib64/ld64.so.2 /lib/../lib64/crt1.o
/lib/../lib64/crti.o /home/test/gcc/ieee128/lib/gcc/powerpc64le-unkno
wn-linux-gnu/11.0.0/crtbegin.o
-L/home/test/gcc/ieee128/lib/gcc/powerpc64le-unknown-linux-gnu/11.0.0
-L/home/test/gcc/ieee128/lib/gcc/powerpc64le-unknown-linux-gnu/11.0.0/../../../../lib64
-L/lib/../lib64 -L/usr/lib/../lib64
-L/home/test/gcc/ieee128/lib/gcc/powerpc64le-unknown-linux-gnu/11.0.0/../../..
/tmp/ccpF549Q
.o -rpath /home/test/gcc/ieee128/lib64 -lstdc++ -lm -lgcc_s -lgcc -lc
-lgcc_s -lgcc
/home/test/gcc/ieee128/lib/gcc/powerpc64le-unknown-linux-gnu/11.0.0/crtend.o
/lib/../lib64/crtn.o
GNU ld version 2.35-14.fc33
Supported emulations:
elf64lppc
elf32lppc
elf32lppclinux
elf32lppcsim
elf64ppc
elf32ppc
elf32ppclinux
elf32ppcsim
elf64bpf
COLLECT_GCC_OPTIONS='-v' '-shared-libgcc' '-dumpdir' 'a.'
[test@ibm-p9b-30 tmp]$ ldd a.out
linux-vdso64.so.1 (0x00007fff8c890000)
libstdc++.so.6 => /home/test/gcc/ieee128/lib64/libstdc++.so.6
(0x00007fff8c5b0000)
libm.so.6 => /lib64/libm.so.6 (0x00007fff8c470000)
libgcc_s.so.1 => /home/test/gcc/ieee128/lib64/libgcc_s.so.1
(0x00007fff8c430000)
libc.so.6 => /lib64/libc.so.6 (0x00007fff8c210000)
/lib64/ld64.so.2 (0x00007fff8c8b0000)
[test@ibm-p9b-30 tmp]$ ./a.out
Hello World!
