I do have ldd (Cygwin) and it can show what DLLs the .exe will load.
That's determined by the PATH, and with the PATH corrected it is
choosing the right version. My understanding is that Windows does not
delay loading the DLL unless the app is linked with /DELAYLOAD, which is
not the case here.
--Jon
On 7/23/2020 11:55 AM, Brice Goglin wrote:
Good to know. Now I don't understand why it occurs. My testing seems to
show that we don't even enter hwloc_topology_init(). If Windows lazily
loads DLLs, it could mean that libhwloc-15.dll is only loaded when the
first hwloc function is called, and that loading would fail for some
reason such as ABI mismatch. Do you know if that's possible on Windows?
If so, would we get an error popup in such a case? And is there a way to
debug dynamic linking issues? On Linux we have ldd and nm/objdump for
checking which libraries are used and what symbols they contain.
Brice
Le 23/07/2020 à 19:32, Jon Dart a écrit :
That was it - the older DLL was in the path. Thanks for looking into it.
--Jon
On 7/22/2020 6:02 AM, Brice Goglin wrote:
Hello Jon
Sorry the delay. I finally got some time to look at this. I can only
reproduce the issue when I am compiling against hwloc 2.0.4 and using
2.2.0 at runtime (placing libhwloc-15.dll in the current directory). If
using the same version (either 2.0.4 or 2.2.0) for both compiling at
running, the program works fine. Can you double-check if you were mixing
versions?
If so, it may look like some sort of ABI break. I am trying to find out
where hwloc_topology_init() crashes.
Brice
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