On Dec 2, 2010, at 4:06 PM, H.J. Lu wrote:
> On Thu, Dec 2, 2010 at 1:01 PM, Paul Koning <paul_kon...@dell.com> wrote:
>>
>> On Dec 2, 2010, at 3:55 PM, H.J. Lu wrote:
>>
>>> On Thu, Dec 2, 2010 at 12:42 PM, Paul Koning <paul_kon...@dell.com> wrote:
>>>>
>>>> On Dec 2, 2010, at 3:05 PM, Ian Lance Taylor wrote:
>>>>
>>>>> Paul Koning <paul_kon...@dell.com> writes:
>>>>>
>>>>>> On Dec 2, 2010, at 2:55 PM, Ian Lance Taylor wrote:
>>>>>>
>>>>>>> Paul Koning <paul_kon...@dell.com> writes:
>>>>>>>
>>>>>>>> I'm trying to do a cross-build of gcc 4.5.1. It works fine until I
>>>>>>>> get to libstdc++v3, where configure blows up with a message saying
>>>>>>>> "Link tests are not allowed after GCC_NO_EXECUTABLES". This happens
>>>>>>>> on the "checking for shl_load" step (line 11221 in configure).
>>>>>>>>
>>>>>>>> I looked at configure.ac to see if there were any clues. I can't tell
>>>>>>>> which line in configure.ac produces the offending line in configure
>>>>>>>> (not enough autoconf skills). In an earlier gcc (3.3.3) there was a
>>>>>>>> similar issue, and in that case I worked around it by removing
>>>>>>>> "GLIBCPP_CHECK_COMPILER_VERSION" from the configure.in file. But that
>>>>>>>> line doesn't exist in configure.ac and attempts to find something
>>>>>>>> analogous didn't get me anywhere.
>>>>>>>
>>>>>>> GCC_NO_EXECUTABLES, in config/no-executables.m4, redefines
>>>>>>> AC_LINK_IFELSE to produce that error message.
>>>>>>
>>>>>> Thanks. But why does the released configure fail like this? Any idea
>>>>>> how to fix this bug?
>>>>>
>>>>> You need to tell us precisely what you tried to do and precisely what
>>>>> happened.
>>>>>
>>>>> The TARGET/libstdc++-v3/config.log file may contain a clue.
>>>>
>>>> It's configured --target=mips64el-netbsdelf --enable-languages=c,c++, on
>>>> an i686-pc-linux-gnu host.
>>>>
>>>
>>> Can you try sysroot with full mips64el-netbsdelf C library and header
>>> files?
>>
>> I have newlib and a full set of headers.
>>
>
> Please DO use sysroot.
That doesn't help.
No real surprise; --with-sysroot doesn't change the fact that I'm building a
cross-compiler, and that fact is what disables link tests. So the thing that
appears to be needed is to avoid the link tests.
The two patches I mentioned cure this issue and seem to make sense; I'll
propose them.
paul
