[Bug libstdc++/15046] New: Math functions misdetected by cross configuration

["drow at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

crossconfig.m4 is pretty incomplete.  The example I found was for GNU/Linux
targeted crosses, but I suspect many of the others have the same problem;
likewise, by inspection, I think that this problem is in 3.4 also (it worked
in 3.3, and I haven't tested 3.4 yet).

The problem is that the *-linux* case doesn't define all the C99 math functions.
This means that sqrtf is provided in libmath/stubs.o as (float) sqrt (val).  sqrt
is a call to __builtin_sqrt, which GCC expands to sqrtf, generating an infinite
loop.

-- 
           Summary: Math functions misdetected by cross configuration
           Product: gcc
           Version: 3.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libstdc++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: drow at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org
  GCC host triplet: i386-pc-linux-gnu
GCC target triplet: arm-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15046