[lfs-dev] gcc pass 1/2 instructions re mpfr/gmp/mpc.

Bruce Dubbs bruce.dubbs at gmail.com
Sat Mar 1 15:04:38 PST 2014

Pierre Labastie wrote:
> Le 01/03/2014 23:31, Bruce Dubbs a écrit :
>> Pierre Labastie wrote:
>>> Le 01/03/2014 21:14, Bruce Dubbs a écrit :
>>>> Pierre Labastie wrote:
>>>>>> It sounds like we need to add a check for libgmp on the host.  Perhaps
>>>>>> libmpfr and libmpc also.
>>>>> It is the .la files, which fire the issue. I could reproduce the error with
>>>>> lfs-7.5-rc1 as the host, by removing libgmp.la.
>>>>> Actually, neither Debian nor Arch provide those .la files. I have not checked
>>>>> Fedora yet.
>>>>> I am not sure what should be done. If users accept to install libgmp-dev,
>>>>> libmpfr-dev, libmpc-dev on their host, the easiest would be to completely
>>>>> remove the build of those packages for gcc-pass1. I'll try that. This would
>>>>> imply that the host requirement be augmented with both libraries _and_ headers
>>>>> checks.
>>>>> Otherwise, maybe just a note telling to remove the .la files (completely
>>>>> removing them gives the cleanest build), at least for the course of the build?
>>>> Yes, on my system I have /usr/lib/libmpfr.la which contains
>>>> dependency_libs=' /usr/lib/libgmp.la'.
>>>> If we add the following to the host system requirements, would that be
>>>> enough?
>>>> [ -e /usr/lib/libmpfr.la ] && [ ! -e /usr/lib/libgmp.la ] &&
>>>>       echo "libgmp is missing"
>>>> I'm going to hold off releasing 7.5 until we get this settled.
>>>>      -- Bruce
>>> I think it is the idea of the fix, except that the libs may be in /usr/lib64
>>> (as in Slackware64). The message should be changed though, since libgmp.so
>>> might be installed without libgmp.la. Do not know exactly what to say: "please
>>> install a package with libgmp.la, or remove libmpfr.la" (too long...)
>> Hmm.  How about:
>> if [ $(ls /usr/lib*/lib{mpfr,gmp,mpc}.so|wc -l) != 3 ]; then
>>     echo one of lib{mpfr,gmp,mpc}.so is missing
>> fi
>>     -- Bruce
> We have to test .la files... What about:
> case "/usr/lib*/libmpfr.la,/usr/lib*/libgmp.la" in
>    *a,) echo libgmp.la is missing ;;
> esac

Some users delete .la files.  If the .so files are present, then it 
shouldn't matter if the .la files are there or not.

   -- Bruce

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