[Bug libstdc++/40974] cannot build gcc-4.4.1: fenv_t has not been declared

[armand dot potter at free dot fr]

------- Comment #13 from armand dot potter at free dot fr  2009-12-15 20:48 -------
I'm using about the same configuration (cross-LFS build but with gcc 4.4.2) and
got the same error. I did some investigations and the problem is that fenv.h
file from build tree is first included (and defines _GLIBCXX_FENV_H to 1) and
then include_next includes fenv.h from host (installed in
/usr/TARGET/include/c++/VERSION/fenv.h) and this time as _GLIBCXX_FENV_H is
already defined, does nothing so fenv.h from glibc is never included.

For a native build, just compiled c++ compiler is used with the -nostdinc++
flag so that /usr/TARGET/include/c++/VERSION/fenv.h is not seen and
include_next works as expected including glibc header.

I don't know what is the correct solution but at least you know what the real
problem is. 
~                                                                               


-- 

armand dot potter at free dot fr changed:

           What    |Removed                     |Added
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                 CC|                            |armand dot potter at free
                   |                            |dot fr


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40974