[project @ 1998-02-09 12:58:10 by sof]

New debug flag: -dshow-rn-imports, dump to stderr the paths to the interface files that are slurped.

diff --git a/ghc/compiler/main/CmdLineOpts.lhs b/ghc/compiler/main/CmdLineOpts.lhs
index c9278fe..0f12e51 100644 (file)
--- a/ghc/compiler/main/CmdLineOpts.lhs
+++ b/ghc/compiler/main/CmdLineOpts.lhs
@@ -37,6 +37,7 @@ module CmdLineOpts (
        opt_D_dump_tc,
        opt_D_show_passes,
        opt_D_show_rn_trace,
+       opt_D_show_rn_imports,
        opt_D_simplifier_stats,
        opt_D_source_stats,
        opt_D_verbose_core2core,
@@ -290,6 +291,7 @@ opt_D_dump_stranal          = lookUp  SLIT("-ddump-stranal")
 opt_D_dump_tc                  = lookUp  SLIT("-ddump-tc")
 opt_D_show_passes              = lookUp  SLIT("-dshow-passes")
 opt_D_show_rn_trace            = lookUp  SLIT("-dshow-rn-trace")
+opt_D_show_rn_imports          = lookUp  SLIT("-dshow-rn-imports")
 opt_D_simplifier_stats         = lookUp  SLIT("-dsimplifier-stats")
 opt_D_source_stats             = lookUp  SLIT("-dsource-stats")
 opt_D_verbose_core2core                = lookUp  SLIT("-dverbose-simpl")

diff --git a/ghc/compiler/rename/RnIfaces.lhs b/ghc/compiler/rename/RnIfaces.lhs
index fc92aca..d52d886 100644 (file)
--- a/ghc/compiler/rename/RnIfaces.lhs
+++ b/ghc/compiler/rename/RnIfaces.lhs
@@ -20,7 +20,7 @@ module RnIfaces (
 #include "HsVersions.h"
 
 import CmdLineOpts     ( opt_PruneTyDecls,  opt_PruneInstDecls, 
-                         opt_IgnoreIfacePragmas
+                         opt_D_show_rn_imports, opt_IgnoreIfacePragmas
                        )
 import HsSyn           ( HsDecl(..), TyDecl(..), ClassDecl(..), InstDecl(..), IfaceSig(..), 
                          HsType(..), ConDecl(..), IE(..), ConDetails(..), Sig(..),
@@ -977,22 +977,24 @@ findAndReadIface doc_str mod_name as_source
          file_path = dir ++ '/' : moduleString mod_name ++ (mod_suffix hisuf)
 \end{code}
 
-@readIface@ trys just one file.
+@readIface@ tries just the one file.
 
 \begin{code}
 readIface :: String -> RnMG (Maybe ParsedIface)        
        -- Nothing <=> file not found, or unreadable, or illegible
        -- Just x  <=> successfully found and parsed 
 readIface file_path
-  = ioToRnMG (hGetStringBuffer file_path)                       `thenRn` \ read_result ->
-    --traceRn (hcat[ptext SLIT("Opening...."), text file_path])   `thenRn_`
+  = ioToRnMG (hGetStringBuffer file_path)       `thenRn` \ read_result ->
     case read_result of
        Right contents    -> 
              case parseIface contents (mkSrcLoc (mkFastString file_path) 1) of
-                 Failed err      ->
-                    failWithRn Nothing err 
+                 Failed err      -> failWithRn Nothing err 
                  Succeeded (PIface iface) -> 
-                    returnRn (Just iface)
+                       if opt_D_show_rn_imports then
+                          putDocRn (hcat[ptext SLIT("Read "), text file_path]) `thenRn_`
+                          returnRn (Just iface)
+                       else
+                          returnRn (Just iface)
 
         Left err ->
          if isDoesNotExistError err then