[project @ 2003-02-19 11:51:35 by simonmar]

If -no-hs-main is specified in --make mode, attempt linking even when
there's no Main module.

Fixes bug #686620

MERGE TO STABLE

diff --git a/ghc/compiler/compMan/CompManager.lhs b/ghc/compiler/compMan/CompManager.lhs
index 1f5aa9a..84ff5ae 100644 (file)
--- a/ghc/compiler/compMan/CompManager.lhs
+++ b/ghc/compiler/compMan/CompManager.lhs
@@ -57,7 +57,7 @@ where
 #include "HsVersions.h"
 
 import DriverPipeline  ( CompResult(..), preprocess, compile, link )
-import DriverState     ( v_Output_file )
+import DriverState     ( v_Output_file, v_NoHsMain )
 import DriverPhases
 import DriverUtil
 import Finder
@@ -638,15 +638,22 @@ cmLoadModules cmstate1 dflags mg2unsorted
              -- clean up after ourselves
              cleanTempFilesExcept verb (ppFilesFromSummaries modsDone)
 
-             -- issue a warning for the confusing case where the user said '-o foo'
-             -- but we're not going to do any linking.
              ofile <- readIORef v_Output_file
-             when (ghci_mode == Batch && isJust ofile && not a_root_is_Main
+             no_hs_main <- readIORef v_NoHsMain
+
+             -- Issue a warning for the confusing case where the user
+             -- said '-o foo' but we're not going to do any linking.
+             -- We attempt linking if either (a) one of the modules is
+             -- called Main, or (b) the user said -no-hs-main, indicating
+             -- that main() is going to come from somewhere else.
+             --
+             let do_linking = a_root_is_Main || no_hs_main
+             when (ghci_mode == Batch && isJust ofile && not do_linking
                     && verb > 0) $
                 hPutStrLn stderr "Warning: output was redirected with -o, but no output will be generated\nbecause there is no Main module."
 
              -- link everything together
-              linkresult <- link ghci_mode dflags a_root_is_Main hpt3 
+              linkresult <- link ghci_mode dflags do_linking hpt3 
 
              cmLoadFinish Succeeded linkresult 
                           hpt3 modsDone ghci_mode pcs3