#1559: make -j doesn't work in libraries/ on Cygwin
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Reporter: simonmar | Owner:
Type: bug | Status: new
Priority: high | Milestone: 6.8
Component: Build System | Version: 6.6.1
Severity: normal | Resolution:
Keywords: | Difficulty: Unknown
Os: Windows | Testcase:
Architecture: Unknown |
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Changes (by igloo):
* owner: igloo =>
Comment:
I suspect this is something to do with FDs getting closed somewhere or
similar. Using the name Makefile rather than GNUmakefile seems to behave
differently, as demonstrated below. Anyone got any ideas?
{{{
$ cat rundir.hs
import System.Cmd
import System.Directory
import System.Environment
import System.Exit
main = do (dir : prog : args) <- getArgs
setCurrentDirectory dir
rawSystem prog args >>= exitWith
$ ghc --make rundir
[1 of 1] Compiling Main ( rundir.hs, rundir.o )
Linking rundir.exe ...
$ cat Makefile
yes:
./rundir works $(MAKE)
no:
./rundir fails $(MAKE)
$ cat fails/GNUmakefile
all: foo bar
foo:
echo $@
bar:
echo $@
$ cat works/Makefile
all: foo bar
foo:
echo $@
bar:
echo $@
$ diff -u fails/GNUmakefile works/Makefile
$ make no -j2
./rundir fails make
make[1]: Entering directory
`/home/ian/ghc/darcs/build/libraries/bug/fails'
echo foo
make[1]: *** read jobs pipe: Is a directory. Stop.
make[1]: *** Waiting for unfinished jobs....
foo
make[1]: Leaving directory `/home/ian/ghc/darcs/build/libraries/bug/fails'
make: *** [no] Error 2
$ make yes -j2
./rundir works make
make[1]: Entering directory
`/home/ian/ghc/darcs/build/libraries/bug/works'
make[1]: warning: jobserver unavailable: using -j1. Add `+' to parent
make rule.
echo foo
foo
echo bar
bar
make[1]: Leaving directory `/home/ian/ghc/darcs/build/libraries/bug/works'
$
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1559>
GHC <http://www.haskell.org/ghc/>
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