hadrian/ci: run testsuite against a freshly produced and installed bindist

.gitlab-ci.yml

@@ -198,8 +198,10 @@ lint-release-changelogs:
     - ./boot
     - ./configure $CONFIGURE_ARGS
     - hadrian/build.cabal.sh --flavour=$FLAVOUR -j`mk/detect-cpu-count.sh` --docs=no-sphinx binary-dist
-    - hadrian/build.cabal.sh --flavour=$FLAVOUR -j`mk/detect-cpu-count.sh` --docs=no-sphinx test --summary-junit=./junit.xml
     - mv _build/bindist/ghc*.tar.xz ghc.tar.xz
+    - export TOP=$(pwd)
+    - cd _build/bindist/ghc-*/ && ./configure --prefix=$TOP/_build/install && make install && cd ../../../
+    - hadrian/build.cabal.sh --flavour=$FLAVOUR -j`mk/detect-cpu-count.sh` --docs=no-sphinx test --summary-junit=./junit.xml --test-compiler=$TOP/_build/install/bin/ghc
   cache:
     key: hadrian
     paths:
@@ -365,8 +367,10 @@ validate-x86_64-darwin:
     - ./boot
     - ./configure $CONFIGURE_ARGS
     - hadrian/build.cabal.sh --flavour=$FLAVOUR -j`mk/detect-cpu-count.sh` --docs=no-sphinx binary-dist
-    - hadrian/build.cabal.sh --flavour=$FLAVOUR -j`mk/detect-cpu-count.sh` --docs=no-sphinx test --summary-junit=./junit.xml
     - mv _build/bindist/ghc*.tar.xz ghc.tar.xz
+    - export TOP=$(pwd)
+    - cd _build/bindist/ghc-*/ && ./configure --prefix=$TOP/_build/install && make install && cd ../../../
+    - hadrian/build.cabal.sh --flavour=$FLAVOUR -j`mk/detect-cpu-count.sh` --docs=no-sphinx test --summary-junit=./junit.xml --test-compiler=$TOP/_build/install/bin/ghc
   after_script:
     - cp -Rf $HOME/.cabal cabal-cache
   artifacts:
@@ -722,7 +726,9 @@ validate-x86_64-linux-fedora27:
       bash -c './configure --enable-tarballs-autodownload GHC=`pwd`/toolchain/bin/ghc HAPPY=`pwd`/toolchain/bin/happy ALEX=`pwd`/toolchain/bin/alex'
     - bash -c "PATH=`pwd`/toolchain/bin:$PATH hadrian/build.cabal.sh --flavour=$FLAVOUR -j`mk/detect-cpu-count.sh` --flavour=Quick --docs=no-sphinx binary-dist"
     - mv _build/bindist/ghc*.tar.xz ghc.tar.xz
-    - bash -c "PATH=`pwd`/toolchain/bin:$PATH hadrian/build.cabal.sh --flavour=$FLAVOUR -j`mk/detect-cpu-count.sh` --flavour=quick test --summary-junit=./junit.xml --skip-perf"
+    - export TOP=$(pwd)
+    - bash -c "cd _build/bindist/ghc-*/ && PATH=`pwd`/toolchain/bin:$PATH ./configure --prefix=$TOP/_build/install && make install && cd ../../../"
+    - bash -c "PATH=`pwd`/toolchain/bin:$PATH hadrian/build.cabal.sh --flavour=$FLAVOUR -j`mk/detect-cpu-count.sh` --flavour=quick test --summary-junit=./junit.xml --skip-perf --test-compiler=$TOP/_build/install/bin/ghc"
     # skipping perf tests for now since we build a quick-flavoured GHC,
     # which might result in some broken perf tests?
   tags: