I had to work on the core-updates branch, or in the past on the wip-gcc7
branch. I mentioned this some month ago. The current branch has an
outdated gcc version.
On 03/12/2019 03:10 PM, Ludovic Courtès wrote:
Hi!
Efraim Flashner <efr...@flashner.co.il> skribis:
On Sun, Mar 10, 2019 at 09:20:04PM +0100, Tobias Platen wrote:
I ran configure on my Talos II, and got the following error message.
checking for the Guix system type... powerpc64le-linux
Sure but that’s the next step. My question was about the triplet you
passed to ‘--target’ when cross-compiling from your Intel(?) machine,
but I think I can derive the answer now:
guix build --target=powerpc64le-linux-gnu …
Guix already knows about this architecture, but building glibc will fail if
gcc does not have the float128 datatype. Once I saw this link[1] on the guix
mailing list, I knew how to solve the build error.
For the second question I could not find an answer.
[1] http://lists.busybox.net/pipermail/buildroot/2017-September/201379.html
Alright.
Thanks for the info.
In the off chance we ever wish to support powerpc64 big endian, I
suggest instead using (string-prefix? "powerpc64*-" target)
Yes.
Unfortunately, with just this extra --with-long-double-128, this:
guix build sed --target=powerpc64le-linux-gnu
eventually leads to a glibc build failure:
--8<---------------cut here---------------start------------->8---
running configure fragment for sysdeps/unix/sysv/linux/powerpc
checking whether powerpc64le-linux-gnu-gcc -g -O2 -mlong-double-128 uses IBM
extended format... yes
running configure fragment for sysdeps/unix/sysv/linux
checking installed Linux kernel header files... 3.2.0 or later
configure: WARNING: minimum kernel version reset to 3.10.0
checking for kernel header at least 3.10.0... ok
running configure fragment for sysdeps/gnu
running configure fragment for sysdeps/powerpc/powerpc64/le
checking if powerpc64le-linux-gnu-gcc supports binary128 floating point type...
no
checking if the target machine is at least POWER8... yes
configure: error: *** binary128 floating point type (GCC >= 6.2) is required
on powerpc64le.
--8<---------------cut here---------------end--------------->8---
See ‘config.log’ excerpt below. Do you happen to have an additional
change needed?
Thanks,
Ludo’.
--8<---------------cut here---------------start------------->8---
configure:6698: result: running configure fragment for
sysdeps/powerpc/powerpc64/le
configure:5: checking if powerpc64le-linux-gnu-gcc supports binary128 floating
point type
configure:31: powerpc64le-linux-gnu-gcc -c -g -O2 -Werror -mfloat128 conftest.c
>&5
powerpc64le-linux-gnu-gcc: error: unrecognized command line option '-mfloat128'
configure:31: $? = 1
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME "GNU C Library"
| #define PACKAGE_TARNAME "glibc"
| #define PACKAGE_VERSION "(see version.h)"
| #define PACKAGE_STRING "GNU C Library (see version.h)"
| #define PACKAGE_BUGREPORT "https://sourceware.org/bugzilla/";
| #define PACKAGE_URL "http://www.gnu.org/software/glibc/";
| #define PKGVERSION "(GNU libc) "
| #define REPORT_BUGS_TO "<http://www.gnu.org/software/libc/bugs.html>"
| #define HAVE_TUNABLES 1
| #define HAVE_CC_NO_STACK_PROTECTOR 1
| #define STACK_PROTECTOR_LEVEL 0
| #define USE_MULTIARCH 1
| #define HAVE_ASM_SET_DIRECTIVE 1
| #define HAVE_SDATA_SECTION 1
| #define NO_CTORS_DTORS_SECTIONS 1
| #define HAVE_Z_COMBRELOC 1
| #define HAVE_CC_INHIBIT_LOOP_TO_LIBCALL 1
| #define HAVE_EHDR_START 1
| #define HAVE_BUILTIN_TRAP 1
| #define HAVE_ELFV2_ABI 1
| #define __LINUX_KERNEL_VERSION (3 * 65536 + 10 * 256 + 0)
| #define __ABI_TAG_VERSION 2,6,32
| #define HAVE_INLINED_SYSCALLS 1
| /* end confdefs.h. */
|
| __float128 a, b, c, d, e;
| int i;
|
| __float128
| foobar (__float128 x)
| {
| a = __builtin_nansq ("0");
| b = __builtin_huge_valq ();
| c = __builtin_infq ();
| d = __builtin_fabsq (x);
| e = __builtin_nanq ("0");
| i = __builtin_signbit (x);
| return __builtin_copysignq (x, x);
| }
|
configure:39: result: no
configure:47: checking if the target machine is at least POWER8
configure:61: powerpc64le-linux-gnu-gcc -c -g -O2 conftest.c >&5
configure:61: $? = 0
configure:68: result: yes
configure:75: error: *** binary128 floating point type (GCC >= 6.2) is
required on powerpc64le.
--8<---------------cut here---------------end--------------->8---
