Terry D. Dontje | Principal Software Engineer
Developer Tools Engineering | +1.781.442.2631
Oracle - Performance Technologies
95 Network Drive, Burlington, MA 01803
Email terry.dontje@oracle.com
Dear OpenMPI developers,Did you try to link in the math library -lm? When I did this your test program worked for me and that actually is the first test that the configure does.
We tried to build OpenMPI 1.5.3 including Support for Platform LSF using the Sun Studio (=Oracle Solaris Studio now) /12.2 and the configure stage failed.
1. Used flags:
./configure --with-lsf --with-openib --with-devel-headers --enable-contrib-no-build=vt --enable-mpi-threads CFLAGS="-fast -xtarget=nehalem -m64" CXXFLAGS="-fast -xtarget=nehalem -m64" FFLAGS="-fast -xtarget=nehalem" -m64 FCFLAGS="-fast -xtarget=nehalem -m64" F77=f95 LDFLAGS="-fast -xtarget=nehalem -m64" --prefix=/..../openmpi-1.5.3mt/linux64/studio
(note the Support for LSF enabled by --with-lsf). The compiler envvars are set as following:
$ echo $CC $FC $CXX
cc f95 CC
The compiler info: (cc -V, CC -V)
cc: Sun C 5.11 Linux_i386 2010/08/13
CC: Sun C++ 5.11 Linux_i386 2010/08/13
2. The configure error was:
##############################################
checking for lsb_launch in -lbat... no
configure: WARNING: LSF support requested (via --with-lsf) but not found.
configure: error: Aborting.
##############################################
3. In the config.log (see the config.log.error) there is more info about the problem. crucial info is:
##############################################
/opt/lsf/8.0/linux2.6-glibc2.3-x86_64/lib/libbat.so: undefined reference to `ceil'
##############################################
4. Googling vor `ceil' results e.g. in http://www.cplusplus.com/reference/clibrary/cmath/ceil/
so, the attached ceil.c example file *can* be compiled by "CC" (the Studio C++ compiler), but *cannot* be compiled using "cc" (the Studio C compiler).
$ CC ceil.c
$ cc ceil.c
See above, it actually is right when you link in the math lib.
5. Looking into configure.log and searching on `ceil' results: there was a check for the availability of `ceil' for the C compiler (see config.log.ceil). This check says `ceil' is *available* for the "cc" Compiler, which is *wrong*, cf. (4).
It looks to me like the lbat configure test is not linking in the math lib.
So, is there an error in the configure stage? Or either the checks in config.log.ceil does not rely on the avilability of the `ceil' funcion in the C compiler?
Best wishes,
Paul Kapinos
P.S. Note in in the past we build many older versions of OpenMPI with no support for LSF and no such problems
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