[Bug 1895358] Re: [Bug] A simple code including tgmath.h cannot be compiled with icc with Ubuntu 20.04 OS

[Launchpad Bug Tracker]

This bug was fixed in the package glibc - 2.32-0ubuntu5

---------------
glibc (2.32-0ubuntu5) hirsute; urgency=medium

  * debian/gbp.conf: Set debian-tag and debian-tag-msg to follow Ubuntu format
  * Don't build libc6-prof in stage1 and stage2
  * Ship libc6-prof on riscv64, too.
    This fixes FTBFS on riscv64 due to the the flavour being built but not
    shipped in a package.
  * Detect debconf consistently in libc6.preinst and do not crash if it is not used
    (LP: #1902955)
  * Prevent rare deadlock in pthread_cond_signal (LP: #1899800)
  * debian/patches/git-updates.diff: update from upstream stable branch

glibc (2.32-0ubuntu4) hirsute; urgency=medium

  * tests: XFAIL time/tst-cpuclock1 on armel, too. (LP: #1895687)
    The armhf build builds for armel, too, thus this fixes the armhf
    autopkgtest.
  * debian/control: Only recommend libnss-nis and libnss-nisplus.
    They pull in a sizable amount of extra dependencies while they are rarely
    needed.
  * Make libc6 provide libc6-lse on arm64.
    Libc6 is now compiled with -moutline-atomics thus the separate binary
    package is dropped.
  * Ship libc variant compiled for profiling in libc6-prof
  * debian/patches/git-updates.diff: update from upstream stable branch
  * Drop obsoleted local-cudacc-float128.diff which breaks new icc
    (LP: #1895358)
  * XFAIL tst-sysvshm-linux on i386 and x32
  * Merge 2.31-4 from Debian unstable

 -- Balint Reczey <rbalint at ubuntu.com>  Fri, 13 Nov 2020 18:54:38 +0100

** Changed in: glibc (Ubuntu)
       Status: Incomplete => Fix Released

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https://bugs.launchpad.net/bugs/1895358

Title:
  [Bug] A simple code including tgmath.h cannot be compiled with icc
  with Ubuntu 20.04 OS

Status in intel:
  Incomplete
Status in glibc package in Ubuntu:
  Fix Released
Status in glibc source package in Focal:
  New
Status in glibc source package in Groovy:
  New

Bug description:
  [Summary]: A simple code including tgmath.h cannot be compiled with
  icc with Ubuntu 20.04 OS

  [Ubuntu OS version]: 20.04

  [Reproduce Steps]: Compile the following code with Intel compiler
  (icc) by running “icc -c test.c”

  $ cat test.c
  #include <tgmath.h>
   
  [Results]
  Expected: There should not be any compilation error

  Actual: The following error is produced:

  $ icc -c test.c
  In file included from /localdisk2/mkl/aakkas/20200721_rls/lnx/compiler/latest/linux/bin/intel64/../../compiler/include/icc/tgmath.h(25),
                   from test.c(1):
  /usr/include/tgmath.h(54): error: #error directive: "Unsupported combination of types for <tgmath.h>."
    #  error "Unsupported combination of types for <tgmath.h>."
       ^
   
  compilation aborted for test.c (code 2)
   

  [Additional Information on Test setup]:

  ICC compiler supports the __float128 type if the reference compiler is more recent than GNU version 4.4. Therefore, __HAVE_FLOAT128 should be set to 1 when ICC compiler is used with GNU version higher than 4.4. Based on this, I believe that the red part below in floatn.h, which comes with Ubuntu OS, should be updated/removed.
   
  #if (defined __x86_64__                                                 \
       ? __GNUC_PREREQ (4, 3)                                             \
       : (defined __GNU__ ? __GNUC_PREREQ (4, 5) : __GNUC_PREREQ (4, 4))) \
       &&  !defined(__CUDACC__) && !defined(__ICC)
  # define __HAVE_FLOAT128 1
  #else
  # define __HAVE_FLOAT128 0
  #endif

  Currently, when the tgmath.h system header file is included on Ubuntu
  20.04 OS system,  __HAVE_FLOAT128 is set to zero and __HAVE_FLOAT64X
  set to 1 for ICC. And this is not a supported combination as checked
  in the new tgmath.h system header file:

  # if ((__HAVE_FLOAT64X && !__HAVE_FLOAT128)             \
        || (__HAVE_FLOAT128 && !__HAVE_FLOAT64X))
  #  error "Unsupported combination of types for <tgmath.h>."
  # endif

  Upstream bug: Not known
  =========================================

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