Commits on Jul 10, 2018

1. flang: libflangrti.so should depend on libompstub.so instead of libom… …

   …p.so
   
   This commit is a clang part of a change that drops unfortunate
   dependency of libflangrti.so on libomp.so.
   
   For non-OpenMP programs (built without -fopenmp flag) frontend
   driver instructs the linker to link against libompstub.so library,
   which exports stubs for all OpenMP runtime library symbols. This is
   because Flang runtime library contains calls to those symbols
   (for OpenMP programs, final binary is linked against libomp.so
   instead).
   
   Apart form above, all of the Fortran programs are linked against
   libflang.so and libflangrti.so. Unfortunately, before this change
   libflangrti.so was depending on full blown OpenMP runtime library
   (libomp.so).
   
   This change creates two sets of Flang runtime shared objects with
   following chains of dependencies:
   
   1. libflang.so -> libflangrti.so -> libompstub.so
   2. libflang-omp.so -> libflangrti-omp.so -> libomp.so
   
   Note that before this commit is applied, relevant commit must be
   applied on flang repository first. Otherwise all OpenMP Fortran programs
   will fail to build at link time.
   
   Signed-off-by: Paul Osmialowski <[email protected]>

   

   pawosm-arm committed Jul 10, 2018
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