On Sun, Jul 17, 2016 at 11:08 AM, Sourabh Chadha <[email protected]> wrote: > Thanks for the reply. -Wl,--export-dynamic was already defined. > > After a lot of back and forth if i removed > -Wl,--no-whole-archive > /nfs/punlinuxvault1/fcdata5/data9/schadha/julia-0.4.6/usr/lib/libunwind-generic.a > /nfs/punlinuxvault1/fcdata5/data9/schadha/julia-0.4.6/usr/lib/libunwind.a > and added -Wl,-E it worked. Cant figure out what i was doing wrong though
FWIW `-Wl,-E` is `-Wl,--export-dynamic` > and why the default settings dont work. > > Anyway thank you for helping me with this. > > > On Saturday, 16 July 2016 19:37:44 UTC+5:30, Tony Kelman wrote: >> >> See also https://github.com/JuliaLang/julia/issues/17451, >> -Wl,--export-dynamic might help (thanks to Yichao Yu for that one). >> >> >> On Sunday, July 10, 2016 at 11:38:11 PM UTC-7, Sourabh Chadha wrote: >>> >>> Thanks for the reply. After changing the compiler flags etc. the symbols >>> now seem to be exported but i get the same error. Here is the nm output >>> >>> nm ../usr/bin/embedding | grep my >>> 0000000000601da0 t __frame_dummy_init_array_entry >>> 0000000000400f10 t frame_dummy >>> 0000000000400f40 T my_c_sqrt >>> >>> >>> On Saturday, 9 July 2016 17:38:23 UTC+5:30, Isaiah wrote: >>>> >>>> The symbol exists but is not exported (t vs T). Try adding DLLEXPORT in >>>> front of the function declaration. On 0.4 it appears to have had a >>>> Windows-only export declaration. >>>> >>>> On Saturday, July 9, 2016, Sourabh Chadha <[email protected]> wrote: >>>>> >>>>> I am new to Julia and have been trying to use ccall to call C functions >>>>> in embedded mode but i am unable to even successfully run the example >>>>> embedding.c that is in package. The example file define a function >>>>> my_c_sqrt >>>>> and then tries to call it using jl_eval_string("println( ccall( >>>>> :my_c_sqrt, >>>>> Float64, (Float64,), 2.0 ) )");. This doesnt work and if i trace the issue >>>>> by printing errors i get ErrorException("ccall: could not find function >>>>> my_c_sqrt"). >>>>> >>>>> I have tried checking eveything. nm on the executble gives this. >>>>> nm ../usr/bin/embedding | grep my >>>>> 0000000000601d80 t __frame_dummy_init_array_entry >>>>> 0000000000400f60 t frame_dummy >>>>> 0000000000400f90 t my_c_sqrt >>>>> >>>>> so the symbol is available. >>>>> >>>>> I am running Red Hat Enterprise Linux Workstation release 7.0 (Maipo) >>>>> nd hve compiled julia Version 0.4.6 from scratch. >>>>> >>>>> any help would be really appreciated >>>>> >
