It all started with hdevtools.
I installed the SublimeHaskell package for Sublime 3 on my Windows 7 machine and got an warning saying that hdevtools couldn't be found, or something along those lines. So I thought I might try to install that package using Cabal.
I have Cygwin installed and in my Path working fine. I try a cabal install hdevtools I get some scary things:
Resolving dependencies...
Configuring unix-2.7.0.1...
Warning: Unknown extensions: CApiFFI, InterruptibleFFI
configure: WARNING: unrecognized options: --with-compiler, --with-gcc
cygwin warning:
MS-DOS style path detected: C:\Users\Stas\AppData\Roaming\cabal/share/config.site
Preferred POSIX equivalent is: /cygdrive/c/Users/Stas/AppData/Roaming/cabal/share/config.site
CYGWIN environment variable option "nodosfilewarning" turns off this warning.
Consult the user's guide for more details about POSIX paths:
http://cygwin.com/cygwin-ug-net/using.html#using-pathnames
checking for gcc... gcc
checking whether the C compiler works... yes
... (many checks that seem okay)
checking build system type... x86_64-unknown-cygwin
checking host system type... x86_64-unknown-cygwin
checking target system type... x86_64-unknown-cygwin
checking for library containing sem_close... no
configure: Not found
configure: creating ./config.status
config.status: creating unix.buildinfo
config.status: creating include/HsUnixConfig.h
configure: WARNING: unrecognized options: --with-compiler, --with-gcc
cabal: Package unix-2.7.0.1 can't be built on this system.
Failed to install unix-2.7.0.1
cabal: Error: some packages failed to install:
hdevtools-0.1.0.5 depends on unix-2.7.0.1 which failed to install.
unix-2.7.0.1 failed during the building phase. The exception was:
ExitFailure 1
So I think, maybe I should install the unix-2.7.0.1 package. Here goes a cabal install unix-2.7.0.1. I actually end up with what seems to be the exact same output, with cabal telling me that unix-2.7.0.1 simply cannot be built on my system. I get the same result when I try to build it manually through downloading the .tar file and configure/building it with runhaskell Setup build in the unpacked directory after a seemingly successful runhaskell Setup configure.
Can anyone illuminate me as to why I cannot build unix-2.7.0.1 on my Windows 7 machine?
As per http://hackage.haskell.org/package/unix, the unix package, which provides bindings to unix system libraries, is not supported under windows.