[Bug 1827523] [NEW] logf -lm ppc64el broken under qemu

[Shawn Landden]

Public bug reported:

This program does not work as expected:

#include <altivec.h>
#include <math.h>
#include <stdio.h>

int main(int argc) {
  vector float o = {4, 3, 2, 0};
  printf("%f %f %f %f\n", o[0], logf(argc), logf(4.0), logf(o[0]));
}

logf always returns -inf when it is run (gcc is analyzing the constant,
logf(4.0)).

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: libc6:ppc64el 2.29-0ubuntu2
ProcVersionSignature: Ubuntu 5.0.0-13.14-generic 5.0.6
Uname: Linux 5.0.0-13-generic x86_64
ApportVersion: 2.20.10-0ubuntu27
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri May  3 09:20:00 2019
Dependencies:
 gcc-9-base 9-20190402-1ubuntu1
 libc6 2.29-0ubuntu2
 libgcc1 1:9-20190402-1ubuntu1
 libidn2-0 2.0.5-1
 libunistring2 0.9.10-1ubuntu2
InstallationDate: Installed on 2019-02-23 (69 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Alpha amd64 (20190203)
PackageArchitecture: ppc64el
SourcePackage: glibc
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: glibc (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug disco ppc64el wayland-session

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to glibc in Ubuntu.
https://bugs.launchpad.net/bugs/1827523

Title:
  logf -lm ppc64el broken under qemu

Status in glibc package in Ubuntu:
  New

Bug description:
  This program does not work as expected:

  #include <altivec.h>
  #include <math.h>
  #include <stdio.h>

  int main(int argc) {
    vector float o = {4, 3, 2, 0};
    printf("%f %f %f %f\n", o[0], logf(argc), logf(4.0), logf(o[0]));
  }

  logf always returns -inf when it is run (gcc is analyzing the
  constant, logf(4.0)).

  ProblemType: Bug
  DistroRelease: Ubuntu 19.04
  Package: libc6:ppc64el 2.29-0ubuntu2
  ProcVersionSignature: Ubuntu 5.0.0-13.14-generic 5.0.6
  Uname: Linux 5.0.0-13-generic x86_64
  ApportVersion: 2.20.10-0ubuntu27
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Fri May  3 09:20:00 2019
  Dependencies:
   gcc-9-base 9-20190402-1ubuntu1
   libc6 2.29-0ubuntu2
   libgcc1 1:9-20190402-1ubuntu1
   libidn2-0 2.0.5-1
   libunistring2 0.9.10-1ubuntu2
  InstallationDate: Installed on 2019-02-23 (69 days ago)
  InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Alpha amd64 (20190203)
  PackageArchitecture: ppc64el
  SourcePackage: glibc
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1827523/+subscriptions