Add tests for unsupported builds on Windows

.gitignore

@@ -69,6 +69,7 @@ register.sh
 # listed explicitly to show which files are generated but ignored
 testdb/intree/cabal.project-test
 testdb/intree/store/**/bin/alex
+testdb/intree/store/**/bin/alex.exe
 testdb/intree/store/**/cabal-hash.txt
 testdb/intree/store/**/share/AlexTemplate.hs
 testdb/intree/store/**/share/AlexWrappers.hs

cabal-testsuite/PackageTests/NoOSSupport/DynExe/Main.hs

@@ -0,0 +1,4 @@
+module Main where
+
+main :: IO ()
+main = pure ()

cabal-testsuite/PackageTests/NoOSSupport/DynExe/a.cabal

@@ -0,0 +1,8 @@
+cabal-version: 3.0
+name: aa
+version: 0.1.0.0
+build-type: Simple
+
+executable a
+  default-language: Haskell2010
+  main-is: Main.hs

cabal-testsuite/PackageTests/NoOSSupport/DynExe/cabal.out

@@ -0,0 +1,10 @@
+# cabal build
+Resolving dependencies...
+Build profile: -w ghc-<GHCVER> -O1
+In order, the following will be built:
+ - aa-0.1.0.0 (exe:a) (first run)
+Configuring executable 'a' for aa-0.1.0.0...
+Error: [Cabal-3339]
+Operating system: windows, does not support shared executables
+Error: [Cabal-7125]
+Failed to build aa-0.1.0.0-inplace-a. The failure occurred during the configure step.

cabal-testsuite/PackageTests/NoOSSupport/DynExe/cabal.test.hs

@@ -0,0 +1,5 @@
+import Test.Cabal.Prelude
+
+main = do
+    skipUnlessWindows
+    cabalTest $ fails $ cabal "build" ["--enable-executable-dynamic"]

cabal-testsuite/PackageTests/NoOSSupport/RelocatableExe/Main.hs

@@ -0,0 +1,4 @@
+module Main where
+
+main :: IO ()
+main = pure ()

cabal-testsuite/PackageTests/NoOSSupport/RelocatableExe/a.cabal

@@ -0,0 +1,8 @@
+cabal-version: 3.0
+name: aa
+version: 0.1.0.0
+build-type: Simple
+
+executable a
+  default-language: Haskell2010
+  main-is: Main.hs

cabal-testsuite/PackageTests/NoOSSupport/RelocatableExe/cabal.out

@@ -0,0 +1,10 @@
+# cabal build
+Resolving dependencies...
+Build profile: -w ghc-<GHCVER> -O1
+In order, the following will be built:
+ - aa-0.1.0.0 (exe:a) (first run)
+Configuring executable 'a' for aa-0.1.0.0...
+Error: [Cabal-3339]
+Operating system: windows, does not support relocatable builds
+Error: [Cabal-7125]
+Failed to build aa-0.1.0.0-inplace-a. The failure occurred during the configure step.

cabal-testsuite/PackageTests/NoOSSupport/RelocatableExe/cabal.test.hs

@@ -0,0 +1,5 @@
+import Test.Cabal.Prelude
+
+main = do
+    skipUnlessWindows
+    cabalTest $ fails $ cabal "build" ["--enable-relocatable"]

cabal-testsuite/src/Test/Cabal/Prelude.hs

@@ -937,6 +937,9 @@ isJavaScript = buildArch == JavaScript
 skipIfWindows :: String -> IO ()
 skipIfWindows why = skipIfIO ("Windows " <> why) isWindows
 
+skipUnlessWindows :: IO ()
+skipUnlessWindows = skipIfIO "Only interesting in Windows" (not isWindows)
+
 getOpenFilesLimit :: TestM (Maybe Integer)
 #ifdef mingw32_HOST_OS
 -- No MS-specified limit, was determined experimentally on Windows 10 Pro x64,