[PATCH] D46472: [HIP] Support offloading by linker script

[Peter Collingbourne via Phabricator via cfe-commits]

pcc added inline comments.


================
Comment at: cfe/trunk/lib/Driver/ToolChains/CommonArgs.cpp:1371-1388
+  // machines.
+  LksStream << "/*\n";
+  LksStream << "       HIP Offload Linker Script\n";
+  LksStream << " *** Automatically generated by Clang ***\n";
+  LksStream << "*/\n";
+  LksStream << "TARGET(binary)\n";
+  LksStream << "INPUT(" << BundleFileName << ")\n";
----------------
tra wrote:
> Using this linker script may present a problem.
> 
> INSERT BEFORE is not going to work with ld.gold.
> https://sourceware.org/bugzilla/show_bug.cgi?id=15373
> 
> LLD also does not handle it particularly well -- INSERT BEFORE can only be used to override explicitly specified external linker script and virtually nobody uses linker scripts with LLD.
> See tests in https://reviews.llvm.org/D44380
> 
If you're just trying to embed a file it may be better to use MC to write an ELF with something like:
```
.section .hip_fatbin
.align 16
.globl __hip_fatbin
__hip_fatbin:
.incbin "BundleFileName"
```
and add that to the link.


Repository:
  rL LLVM

https://reviews.llvm.org/D46472