GHC should be able to warn on unsafe CPP usage
GCC has a warning -Wundef that catches unsafe CPP usage like:
#if variable_does_not_exist
// something
#endifThe GCC man page says about -Wundef:
-Wundef
Warn if an undefined identifier is evaluated in an "#if" directive.Following GCC's lead, GHC should have a similar warning flag to detect and warn about this problem in Haskell code that uses CPP.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.1 |
| Type | FeatureRequest |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |
Edited by erikd