Bug#345587: cpp-4.0: x86/powerpc inconsistency for the __linux macro

[Vincent Lefevre]

Control: tags -1 + wontfix

On 2016-01-25 17:10:59 +0100, Matthias Klose wrote:
> Control: tags -1 + wontfix

Retagging wontfix (FYI, "Control:" pseudo-headers do not work with
-done: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=746206).

I don't know the reason of this wontfix, but anyway, neither __linux
nor __linux__ is mentioned in the GCC manual (at least for the recent
versions), so that I assume that the developers should not rely on it.

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Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)

Bug#345587: cpp-4.0: x86/powerpc inconsistency for the __linux macro

[Vincent Lefevre]

Package: cpp-4.0
Version: 4.0.2-5
Severity: normal

As shown below, the __linux macro is no longer defined when using
the C99 mode on a PowerPC machine. An x86 machine does not have
this behavior. This is normal for the linux macro to be no longer
defined (as it is not reserved), but I do not see why it should
be the case for the __linux macro. So, IMHO, the PPC should do
the same as x86.

On an x86 machine:

dixsept:~ gcc -v
Using built-in specs.
Target: i486-linux-gnu
Configured with: ../src/configure -v 
--enable-languages=c,c++,java,f95,objc,ada,treelang --prefix=/usr 
--enable-shared --with-system-zlib --libexecdir=/usr/lib 
--without-included-gettext --enable-threads=posix --enable-nls 
--program-suffix=-4.0 --enable-__cxa_atexit --enable-clocale=gnu 
--enable-libstdcxx-debug --enable-java-awt=gtk-default --enable-gtk-cairo 
--with-java-home=/usr/lib/jvm/java-1.4.2-gcj-4.0-1.4.2.0/jre --enable-mpfr 
--disable-werror --enable-checking=release i486-linux-gnu
Thread model: posix
gcc version 4.0.3 20051201 (prerelease) (Debian 4.0.2-5)

dixsept:~ gcc -dM -E -xc /dev/null | grep linux
#define __linux 1
#define __linux__ 1
#define __gnu_linux__ 1
#define linux 1

dixsept:~ gcc -std=c99 -dM -E -xc /dev/null | grep linux
#define __linux 1
#define __linux__ 1
#define __gnu_linux__ 1

On a PowerPC machine:

ay:~ gcc -v
Using built-in specs.
Target: powerpc-linux-gnu
Configured with: ../src/configure -v 
--enable-languages=c,c++,java,f95,objc,ada,treelang --prefix=/usr 
--enable-shared --with-system-zlib --libexecdir=/usr/lib 
--without-included-gettext --enable-threads=posix --enable-nls 
--program-suffix=-4.0 --enable-__cxa_atexit --enable-clocale=gnu 
--enable-libstdcxx-debug --enable-java-awt=gtk-default --enable-gtk-cairo 
--with-java-home=/usr/lib/jvm/java-1.4.2-gcj-4.0-1.4.2.0/jre --enable-mpfr 
--disable-softfloat --enable-targets=powerpc-linux,powerpc64-linux 
--with-cpu=default32 --disable-werror --enable-checking=release 
powerpc-linux-gnu
Thread model: posix
gcc version 4.0.3 20051201 (prerelease) (Debian 4.0.2-5)

ay:~ gcc -dM -E -xc /dev/null | grep linux
#define __linux 1
#define __linux__ 1
#define __gnu_linux__ 1
#define linux 1

ay:~ gcc -std=c99 -dM -E -xc /dev/null | grep linux
#define __linux__ 1
#define __gnu_linux__ 1

-- System Information:
Debian Release: testing/unstable
  APT prefers testing
  APT policy: (900, 'testing'), (900, 'stable'), (200, 'unstable')
Architecture: powerpc (ppc)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.12-20050829
Locale: LANG=POSIX, LC_CTYPE=en_US.ISO8859-1 (charmap=ISO-8859-1)

Versions of packages cpp-4.0 depends on:
ii  gcc-4.0-base  4.0.2-5The GNU Compiler Collection (base 
ii  libc6 2.3.5-8GNU C Library: Shared libraries an

cpp-4.0 recommends no packages.

-- no debconf information


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