[Bug math/13741] New: Compilation fail with g++ 3.3.6 with option -ffast-math due to undefined macros __extern_always_inline

[Bug math/13741] New: Compilation fail with g++ 3.3.6 with option -ffast-math due to undefined macros __extern_always_inline

[uleysky at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13741

             Bug #: 13741
           Summary: Compilation fail with g++ 3.3.6 with option
                    -ffast-math due to undefined macros
                    __extern_always_inline
           Product: glibc
           Version: 2.15
            Status: NEW
          Severity: minor
          Priority: P2
         Component: math
        AssignedTo: unassigned@sourceware.org
        ReportedBy: uleysky@gmail.com
                CC: aj@suse.de
    Classification: Unclassified


Very simple testcase test.cpp
#include <math.h>
int main() { return 0; }

g++-3.3.6 -o t -ffast-math test.cpp
In file included from /usr/include/math.h:424,
                 from test.cpp:1:
/usr/include/bits/math-finite.h:177: error: syntax error before `double'
/usr/include/bits/math-finite.h:186: error: syntax error before `float'
/usr/include/bits/math-finite.h:196: error: syntax error before `long'
/usr/include/bits/math-finite.h:210: error: syntax error before `double'
/usr/include/bits/math-finite.h:219: error: syntax error before `float'
/usr/include/bits/math-finite.h:229: error: syntax error before `long'
/usr/include/bits/math-finite.h:307: error: syntax error before `double'
/usr/include/bits/math-finite.h:310: error: `__d' was not declared in this 
   scope
/usr/include/bits/math-finite.h:310: error: `__local_signgam' was not declared 
   in this scope
/usr/include/bits/math-finite.h:311: error: syntax error before `return'
/usr/include/bits/math-finite.h:314: error: syntax error before `float'
/usr/include/bits/math-finite.h:317: error: conflicting types for `float __res'
/usr/include/bits/math-finite.h:310: error: previous declaration as `double 
   __res'
/usr/include/bits/math-finite.h:317: error: `__d' was not declared in this 
   scope
/usr/include/bits/math-finite.h:317: error: `__local_signgam' was not declared 
   in this scope
/usr/include/bits/math-finite.h:318: error: syntax error before `return'
/usr/include/bits/math-finite.h:322: error: syntax error before `long'
/usr/include/bits/math-finite.h:325: error: conflicting types for `long double 
   __res'
/usr/include/bits/math-finite.h:317: error: previous declaration as `float 
   __res'
/usr/include/bits/math-finite.h:325: error: `__d' was not declared in this 
   scope
/usr/include/bits/math-finite.h:325: error: `__local_signgam' was not declared 
   in this scope
/usr/include/bits/math-finite.h:326: error: syntax error before `return'

The root of problem is simple: in this case macros __extern_always_inline not
defined. Also, the problem is observed only with g++, not gcc.

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[Bug math/13741] Compilation fail with g++ 3.3.6 with option -ffast-math due to undefined macros __extern_always_inline

[polacek at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13741

Marek Polacek <polacek at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |polacek at redhat dot com
         Resolution|                            |INVALID

--- Comment #1 from Marek Polacek <polacek at redhat dot com> 2012-02-24 09:44:18 UTC ---
Please use newer version of g++.  The 3.3.6 version is now deprecated.

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[Bug math/13741] Compilation fail with g++ 3.3.6 with option -ffast-math due to undefined macros __extern_always_inline

[jakub at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13741

Jakub Jelinek <jakub at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
                 CC|                            |jakub at redhat dot com
         Resolution|INVALID                     |

--- Comment #2 from Jakub Jelinek <jakub at redhat dot com> 2012-02-24 09:52:23 UTC ---
Actually that is not the case.  GCC 3.3.6 isn't supported for building of glibc
itself, still, compiling with GCC 3.3.6 your own programs against glibc headers
and linking against it is supported.

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[Bug math/13741] Compilation fail with g++ 3.3.6 with option -ffast-math due to undefined macros __extern_always_inline

[jsm28 at gcc dot gnu.org]

http://sourceware.org/bugzilla/show_bug.cgi?id=13741

--- Comment #3 from Joseph Myers <jsm28 at gcc dot gnu.org> 2012-03-02 01:03:50 UTC ---
Conditioning these definitions on __extern_always_inline being defined is
probably the appropriate fix.

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[Bug math/13741] Compilation fail with g++ 3.3.6 with option -ffast-math due to undefined macros __extern_always_inline

[polacek at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13741

Marek Polacek <polacek at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |ASSIGNED
         AssignedTo|unassigned at sourceware    |polacek at redhat dot com
                   |dot org                     |

--- Comment #4 from Marek Polacek <polacek at redhat dot com> 2012-08-31 10:47:02 UTC ---
Mine.

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[Bug math/13741] Compilation fail with g++ 3.3.6 with option -ffast-math due to undefined macros __extern_always_inline

[polacek at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13741

Marek Polacek <polacek at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED

--- Comment #5 from Marek Polacek <polacek at redhat dot com> 2012-09-26 11:01:53 UTC ---
Should be fixed by b7bfe116.

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[Bug math/13741] Compilation fail with g++ 3.3.6 with option -ffast-math due to undefined macros __extern_always_inline

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=13741

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|                            |security-

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