Merge _stub.o files back in to the .o file (#3687) · Issues · Glasgow Haskell Compiler / GHC

Merge _stub.o files back in to the .o file

GHC sometimes generates _stub.o files. When it does, ghci doesn't work with compiled files (it forgets to include the _stub.o in the files to link against), and it complicates many building rules (including those inside GHC's makefile).

It would be far better if the _stub.o files were merged back in with the original. This is actually reasonably easy:

b <- doesFileExist stub
when b $ do
    let tmp = res <.> "tmp.o"
    mv obj tmp
    exec ["ld","-r","-o",obj,tmp,stub]
    rm stub
    rm tmp

While being mainly a feature request, this enhancement also fixes a bug with GHCi loading files with _stub's, so includes a bug fix for free.

Trac metadata

Trac field	Value
Version	6.10.4
Type	FeatureRequest
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture

It would be far better if the _stub.o files were merged back in with the original. This is actually reasonably easy:

```
b <- doesFileExist stub
when b $ do
    let tmp = res <.> "tmp.o"
    mv obj tmp
    exec ["ld","-r","-o",obj,tmp,stub]
    rm stub
    rm tmp
```

While being mainly a feature request, this enhancement also fixes a bug with GHCi loading files with _stub's, so includes a bug fix for free.

<details><summary>Trac metadata</summary>

| Trac field             | Value          |
| ---------------------- | -------------- |
| Version                | 6.10.4         |
| Type                   | FeatureRequest |
| TypeOfFailure          | OtherFailure   |
| Priority               | normal         |
| Resolution             | Unresolved     |
| Component              | Compiler       |
| Test case              |                |
| Differential revisions |                |
| BlockedBy              |                |
| Related                |                |
| Blocking               |                |
| CC                     |                |
| Operating system       |                |
| Architecture           |                |

</details>