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Re: Bug#748361: m4: build tests are failing on ppc64el


From: Eric Blake
Subject: Re: Bug#748361: m4: build tests are failing on ppc64el
Date: Fri, 16 May 2014 10:00:18 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0

adding gnulib, as m4 merely borrows the content from gnulib.

On 05/16/2014 09:52 AM, Santiago Vila wrote:
> Hello.
> 
> I received the following report from the Debian bug system.
> [ Please keep the Cc: lines when replying. Thanks ].
> 
> ----- Forwarded message from Erwan Prioul <address@hidden> -----
> 
> Date: Fri, 16 May 2014 16:56:11 +0200
> From: Erwan Prioul <address@hidden>
> To: Debian Bug Tracking System <address@hidden>
> Subject: Bug#748361: m4: build tests are failing on ppc64el
> 
> Package: m4
> Version: 1.4.17-2
> Severity: normal
> Tags: upstream patch
> 
> Dear Maintainer,
> 
> I've noticed build tests are failing on ppc64el.
> 
> In Ubuntu, the attached patch was applied to fix the issue (Fix
> detection of floating point endianness).
> 
> Thanks for considering the patch.
> 
> Erwan Prioul.
> 
> -- System Information:
> Debian Release: jessie/sid
>   APT prefers unstable
>   APT policy: (500, 'unstable')
> Architecture: ppc64el (ppc64le)
> 
> Kernel: Linux 3.13-1-powerpc64le (SMP w/1 CPU core)
> Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
> Shell: /bin/sh linked to /bin/dash
> 
> -- no debconf information
> 
> 
> Description: Fix detection of floating point endianness
>  See https://lists.gnu.org/archive/html/bug-gnulib/2013-12/msg00104.html
> Author: Alan Modra <address@hidden>
> Author: Colin Watson <address@hidden>
> Forwarded: no
> Last-Update: 2013-12-18
> 
> Index: b/tests/test-isnanl.h
> ===================================================================
> --- a/tests/test-isnanl.h
> +++ b/tests/test-isnanl.h
> @@ -24,6 +24,12 @@
>  #include "nan.h"
>  #include "macros.h"
>  
> +#ifdef __FLOAT_WORD_ORDER__
> +# define FLOAT_BIG_ENDIAN (__FLOAT_WORD_ORDER__ != __ORDER_LITTLE_ENDIAN__)
> +#else
> +# define FLOAT_BIG_ENDIAN (LDBL_EXPBIT0_WORD < NWORDS / 2)
> +#endif
> +
>  int
>  main ()
>  {
> @@ -56,10 +62,10 @@
>  # if LDBL_EXPBIT0_BIT > 0
>      m.word[LDBL_EXPBIT0_WORD] ^= (unsigned int) 1 << (LDBL_EXPBIT0_BIT - 1);
>  # else
> -    m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)]
> +    m.word[LDBL_EXPBIT0_WORD + (FLOAT_BIG_ENDIAN ? 1 : - 1)]
>        ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
>  # endif
> -    m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)]
> +    m.word[LDBL_EXPBIT0_WORD + (FLOAT_BIG_ENDIAN ? 1 : - 1)]
>        |= (unsigned int) 1 << LDBL_EXPBIT0_BIT;
>      ASSERT (isnanl (m.value));
>    }
> Index: b/tests/test-signbit.c
> ===================================================================
> --- a/tests/test-signbit.c
> +++ b/tests/test-signbit.c
> @@ -36,6 +36,12 @@
>  double zerod = 0.0;
>  long double zerol = 0.0L;
>  
> +#ifdef __FLOAT_WORD_ORDER__
> +# define FLOAT_BIG_ENDIAN (__FLOAT_WORD_ORDER__ != __ORDER_LITTLE_ENDIAN__)
> +#else
> +# define FLOAT_BIG_ENDIAN (LDBL_EXPBIT0_WORD < NWORDS / 2)
> +#endif
> +
>  static void
>  test_signbitf ()
>  {
> @@ -156,10 +162,10 @@
>  # if LDBL_EXPBIT0_BIT > 0
>      m.word[LDBL_EXPBIT0_WORD] ^= (unsigned int) 1 << (LDBL_EXPBIT0_BIT - 1);
>  # else
> -    m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)]
> +    m.word[LDBL_EXPBIT0_WORD + (FLOAT_BIG_ENDIAN ? 1 : - 1)]
>        ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
>  # endif
> -    m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)]
> +    m.word[LDBL_EXPBIT0_WORD + (FLOAT_BIG_ENDIAN ? 1 : - 1)]
>        |= (unsigned int) 1 << LDBL_EXPBIT0_BIT;
>      (void) signbit (m.value);
>      #undef NWORDS
> 
> 
> 
> ----- End forwarded message -----
> 
> 
> 

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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