I have a standard Linux/ppc64 system with gcc-4.8.3 I have configured the 2.0.2rc3 tarball with
--prefix=... --enable-builtin-atomics \ CFLAGS=-m32 --with-wrapper-cflags=-m32 \ CXXFLAGS=-m32 --with-wrapper-cxxflags=-m32 \ FCFLAGS=-m32 --with-wrapper-fcflags=-m32 --disable-mpi-fortran (Yes, I know the FCFLAGS are unnecessary). I get a "make check" failure: make[3]: Entering directory `/home/phargrov/OMPI/openmpi-2.0.2rc3-linux-ppc32-gcc/BLD/test/asm' CC atomic_barrier.o CCLD atomic_barrier CC atomic_barrier_noinline-atomic_barrier_noinline.o CCLD atomic_barrier_noinline CC atomic_spinlock.o CCLD atomic_spinlock CC atomic_spinlock_noinline-atomic_spinlock_noinline.o CCLD atomic_spinlock_noinline CC atomic_math.o CCLD atomic_math atomic_math.o: In function `atomic_math_test': atomic_math.c:(.text+0x78): undefined reference to `__sync_add_and_fetch_8' collect2: error: ld returned 1 exit status make[3]: *** [atomic_math] Error 1 It looks like there is an (incorrect) assumption that 8-byte atomics are available. Removing --enable-builtin-atomics resolves this issue. -Paul -- Paul H. Hargrove phhargr...@lbl.gov Computer Languages & Systems Software (CLaSS) Group Computer Science Department Tel: +1-510-495-2352 Lawrence Berkeley National Laboratory Fax: +1-510-486-6900
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