#4063: target "is not a module name or a source file"
---------------------------------+------------------------------------------
Reporter: beroal | Owner:
Type: feature request | Status: new
Priority: normal | Component: Compiler
Version: 6.12.2 | Keywords: target,module name,source
file,flag
Os: Unknown/Multiple | Testcase:
Architecture: Unknown/Multiple | Failure: None/Unknown
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Create a standalone Haskell program "/tmp/delme.hs". Then do
{{{
$ cd /tmp
{- 0 -}$ ghc --make -o delme.exe /tmp/delme.hs
[1 of 1] Compiling Main ( /tmp/delme.hs, /tmp/delme.o )
Linking delme.exe ...
$ rm delme.o
{- 1 -}$ ghc --make -o delme.exe /tmp/delme
[1 of 1] Compiling Main ( /tmp/delme.hs, /tmp/delme.o )
Linking delme.exe ...
$ rm delme.o
$ mv delme.hs delme
{- 2 -}$ ghc --make -o delme.exe /tmp/delme
target `/tmp/delme' is not a module name or a source file
}}}
We see that:[[BR]]
- in "1" GHC compiles "/tmp/delme.hs" though I say "/tmp/delme";[[BR]]
- in "2" GHC can not see file "/tmp/delme".
The problem is that a target (the last argument) may be a module name or a
source file. GHC uses heuristics to determine this. Though heuristics may
seem neat and clever, they draw GHC more '''intricate and unpredictable'''
(see also [http://en.wikipedia.org/wiki/KISS_principle KISS]).
I encountered this intricacy when ran "ghc" on a shell script. Shell
scripts in Unix commonly do not have extensions, because interpreter name
is included in a shell script. And "runghc" runs them fine. "ghc" in
theory also does not require a file to have an extension because it
clearly contains Haskell source code — what else?
I propose to introduce a GHC flag which says explicitly which type a
target is of.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4063>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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