[PPL-devel] ppl-0.11.2 install problems with GCC

[Andre Nicolle]

Hi All

I have recently been compiling GCC 4.6.2 on a newly installed centos 5.6 
computer and come across several strange problems when compiling PPL. 
GCC is being compiled to a new directory for distribution on a cluster 
so I install gmp-5.0.2 with configuration command ./configure 
--prefix=/share/apps/gcc/4.6.2 --enable-cxx this I compile using GCC 4.4 
which was installed from the repositories. When compiling ppl-0.11.2 
with configuration command ./configure --prefix=/share/apps/gcc/4.6.2 
--with-gmp-build=/share/apps/gcc/4.6.2 and GCC 4.4 I get the following 
error message:

checking how to link with libgmp... /share/apps/gcc/4.6.2/lib/libgmp.so 
-Wl,-rpath -Wl,/share/apps/gcc/4.6.2/lib
checking how to link with libgmpxx... 
/share/apps/gcc/4.6.2/lib/libgmpxx.so 
/share/apps/gcc/4.6.2/lib/libgmp.so -Wl,-rpath 
-Wl,/share/apps/gcc/4.6.2/lib -Wl,-rpath -Wl,/share/apps/gcc/4.6.2/lib
checking for the GMP library version 4.1.3 or above... no
configure: error: Cannot find GMP version 4.1.3 or higher.
GMP is the GNU Multi-Precision library:

This is similar to the discussion at this link:

http://www.cs.unipr.it/pipermail/ppl-devel/2011-March/017387.html

Switching back to GCC 4.1 solves this problem and I successfully compile 
and test gmp and ppl-0.11.2. Is this a problem with the configure script?

I then decided to compile ppl-0.11.2 again but this time using my newly 
compiled GCC 4.6.2 which does not encounter the previous error and 
configures correctly. However during the build I get the following error:

/share/apps/gcc/4.6.2/lib../lib/libstdc++.so: could not read symbols: 
File in wrong format

The environmental variables are set with the following command to use 
the newly installed GCC 4.6.2.

export PATH=/share/apps/gcc/4.6.2/bin:$PATH
export 
LD_LIBRARY_PATH=/share/apps/gcc/4.6.2/lib:/share/apps/gcc/4.6.2/lib64:$LD_LIBRARY_PATH

This I discover is due to the compiler trying to link to the non-64bit 
version of libstdc++.so similar to the discussion here:

http://www.cs.unipr.it/pipermail/ppl-devel/2009-April/014677.html

By linking:

ln -s /share/apps/gcc/4.6.2/lib64/libstdc++.so 
/share/apps/gcc/4.6.2/lib/libstdc++.so

the 64bit version of the file into the requested location, I am able to 
compile and test ppl. This does not seem correct behaviour, could 
somebody tell me what is going wrong and how to fix this.

Thanks

Andre