More mmap-workaround-workarounds

There were more things that didn't like GHCRTS=-xm...
 * more packages with custom setups, hidden in the CI cache
 * packages using happy, also hidden in the CI cache
 * a call to cabal v2-test clash-cosim, only ran on "external" PRs

.ci/build.sh

@@ -21,12 +21,27 @@ if [[ "$GHC_HEAD" != "yes" ]]; then
   mv cabal.project.local.disabled cabal.project.local
   [[ ! -f cabal.project.freeze.disabled ]] || mv cabal.project.freeze.disabled cabal.project.freeze
 fi
-set -u
 
-cabal v2-build clash-prelude --write-ghc-environment-files=always
-# Undo mmap crash workaround for clash-cosim, see PR #2572.
-# It uses a custom setup, which can't be linked with -rtsopts
-GHCRTS="" cabal v2-build clash-cosim --write-ghc-environment-files=always
+# Any package with a custom setup or using happy can only be built with GHCRTS=""
+# see PR #2572.
+if [[ "$GHCRTS" != "" ]]; then
+CANT_BUILD_WITH_RTSOPTS="ghc-paths haskell-src-exts pretty-show singletons"
+cabal v2-build --only-dependencies $CANT_BUILD_WITH_RTSOPTS
+GHCRTS="" cabal v2-build $CANT_BUILD_WITH_RTSOPTS
+
+# singletons-base only used on ghc >= 9.0
+GHC_MAJOR_VERSION=$(ghc --numeric-version | awk -F . '{print $1}')
+if [[ "$GHC_MAJOR_VERSION" -gt "8" ]]; then
+cabal v2-build --only-dependencies singletons-base
+GHCRTS="" cabal v2-build singletons-base
+fi
+
+cabal v2-build clash-prelude
+
+cabal v2-build --only-dependencies clash-cosim
+GHCRTS="" cabal v2-build clash-cosim
+fi
+set -u
 
 # Build with default constraints
 cabal v2-build all --write-ghc-environment-files=always

.github/workflows/ci.yml

@@ -180,7 +180,7 @@ jobs:
           cabal v2-test clash-prelude
           cabal v2-test clash-lib
           cabal v2-test clash-cores
-          cabal v2-test clash-cosim
+          GHCRTS="" cabal v2-test clash-cosim
 
       - name: Testsuite (VHDL)
         if: github.ref != 'refs/heads/master'