Update Wiki URLs to point to GitLab

This moves all URL references to Trac Wiki to their corresponding
GitLab counterparts.

This substitution is classified as follows:

1. Automated substitution using sed with Ben's mapping rule [1]
    Old: ghc.haskell.org/trac/ghc/wiki/XxxYyy...
    New: gitlab.haskell.org/ghc/ghc/wikis/xxx-yyy...

2. Manual substitution for URLs containing `#` index
    Old: ghc.haskell.org/trac/ghc/wiki/XxxYyy...#Zzz
    New: gitlab.haskell.org/ghc/ghc/wikis/xxx-yyy...#zzz

3. Manual substitution for strings starting with `Commentary`
    Old: Commentary/XxxYyy...
    New: commentary/xxx-yyy...

See also !539

[1]: https://gitlab.haskell.org/bgamari/gitlab-migration/blob/master/wiki-mapping.json

5 files changed, 6 insertions, 6 deletions

diff --git a/mk/build.mk.sample b/mk/build.mk.sample
index 0f5bc222f2..80457b6a47 100644
--- a/mk/build.mk.sample
+++ b/mk/build.mk.sample
@@ -96,7 +96,7 @@ endif
 #GhcRtsHcOpts += -g3
 
 # Build the "extra" packages (see ./packages). This enables more tests. See:
-# https://ghc.haskell.org/trac/ghc/wiki/Building/RunningTests/Running#AdditionalPackages
+# https://gitlab.haskell.org/ghc/ghc/wikis/building/running-tests/running#additional-packages
 #BUILD_EXTRA_PKGS=YES
 
 # Uncomment the following to force `integer-gmp` to use the in-tree GMP 6.1.2
diff --git a/mk/compiler-ghc.mk b/mk/compiler-ghc.mk
index f936cc6c5c..739f6157d5 100644
--- a/mk/compiler-ghc.mk
+++ b/mk/compiler-ghc.mk
@@ -5,8 +5,8 @@
 # This file is part of the GHC build system.
 #
 # To understand how the build system works and how to modify it, see
-#      http://ghc.haskell.org/trac/ghc/wiki/Building/Architecture
-#      http://ghc.haskell.org/trac/ghc/wiki/Building/Modifying
+#      https://gitlab.haskell.org/ghc/ghc/wikis/building/architecture
+#      https://gitlab.haskell.org/ghc/ghc/wikis/building/modifying
 #
 # -----------------------------------------------------------------------------
 
diff --git a/mk/config.mk.in b/mk/config.mk.in
index 0fc6d4dd16..79191af52e 100644
--- a/mk/config.mk.in
+++ b/mk/config.mk.in
@@ -556,7 +556,7 @@ INSTALL_GHC_STAGE= $(if $(filter YES,$(Stage1Only)),1,2)
 # 4 CrossCompiling=YES Stage1Only=NO
 #   Cross-compiling GHC itself. See [1].
 #
-# [1] https://ghc.haskell.org/trac/ghc/wiki/Building/CrossCompiling
+# [1] https://gitlab.haskell.org/ghc/ghc/wikis/building/cross-compiling
 
 # Note [Stage1Only vs stage=1]
 #
diff --git a/mk/project.mk.in b/mk/project.mk.in
index d620ed5a61..5cc2e4aeb1 100644
--- a/mk/project.mk.in
+++ b/mk/project.mk.in
@@ -73,7 +73,7 @@ ProjectGitCommitId = @ProjectGitCommitId@
 #  - In the compiler itself, we should test HOST or TARGET depending
 #    on whether the conditional relates to the code being generated, or
 #    the platform on which the compiler is running.  See the section
-#    on "Coding Style" in the commentary for more details.
+#    on "coding-style" in the commentary for more details.
 #
 #  - In all other code, we should be testing HOST only.
 #
diff --git a/mk/warnings.mk b/mk/warnings.mk
index 9775df7093..323ea75898 100644
--- a/mk/warnings.mk
+++ b/mk/warnings.mk
@@ -5,7 +5,7 @@ SRC_HC_OPTS     += -Wall
 # validate may unnecessarily fail when booting with an older compiler.
 # It would be better to only exclude certain warnings from becoming errors
 # (e.g. '-Werror -Wno-error=unused-imports -Wno-error=...'), but -Wno-error
-# isn't supported yet (https://ghc.haskell.org/trac/ghc/wiki/Design/Warnings).
+# isn't supported yet (https://gitlab.haskell.org/ghc/ghc/wikis/design/warnings).
 #
 # See Note [Stage number in build variables] in mk/config.mk.in.
 SRC_HC_OPTS_STAGE1 += $(WERROR)