GHC should not load packages for TH if they are not used
https://github.com/nh2/ghc-bug-th-loading
When you call
ghc --make -package mypackageon a module that uses TH, you will see
Loading package mypackage-1.2.3.4 ... linking ... done.even if no code uses it. This slows down builds, especially cabal ones.
GHCI does this better and only loads what is needed.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.6.3 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | mail@nh2.me |
| Operating system | |
| Architecture |