configure.ac uses wrong triple information.

GHC's configure script seems to normalize the values returned from config.guess.

So for Windows it turns x86_64-pc-mingw64 into x86_64-unknown-mingw32.

These mangled names are stored in the values $BuildPlatform, $HostPlatform and $TargetPlatform.

However further down the file when the comparison is done between the stage0 compiler and the host the normalized versions are not used.

So when normalization actually changes the triple this check will fail.

Not sure why it's worked for all this time..

Trac metadata

Trac field	Value
Version	8.0.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Build System
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture

changed weight to 5

added Tbug Trac import labels

assigned to @Phyx

Trac metadata

Trac field	Value
Differential revisions	- → D2452

mentioned in commit 18f06878

closed

Trac metadata

Trac field	Value
Resolution	Unresolved → ResolvedFixed

mentioned in commit 0cc3931b

reopened

changed milestone to %8.0.2

These need to be merged.

added 1 deleted label

closed

These were merged as 682518d4 and b2050299.

removed 1 deleted label

mentioned in issue #12840 (closed)

mentioned in issue #12841

The new Hadrian build system has been merged. Relabeling the tickets concerning the legacy make build system to prevent confusion.

Trac metadata

Trac field	Value
Component	Build System → Build System (make)

added ghc build failure label

added Pnormal label