I installed the EclipseFP 2.6.4 plugin under Eclipse Luna, then restarted. When it started to attempt to install the executables for the first time, nothing was installed successfully. I went through all of the log files that were generated and found two that contained errors: ansi-terminal-0.6.2.1 and unix-compat-0.4.1.4.
The log for unix-compat-0.4.1.4:
Configuring unix-compat-0.4.1.4...
setup-Cabal-1.18.1.3-x86_64-windows-ghc-7.8.3.exe: Missing dependency on a
foreign library:
* Missing C library: msvcrt
This problem can usually be solved by installing the system package that
provides this library (you may need the "-dev" version). If the library is
already installed but in a non-standard location then you can use the flags
--extra-include-dirs= and --extra-lib-dirs= to specify where it is.
The log for ansi-terminal-0.6.2.1:
Configuring ansi-terminal-0.6.2.1...
setup-Cabal-1.18.1.3-x86_64-windows-ghc-7.8.3.exe: Missing dependency on a
foreign library:
* Missing C library: kernel32
This problem can usually be solved by installing the system package that
provides this library (you may need the "-dev" version). If the library is
already installed but in a non-standard location then you can use the flags
--extra-include-dirs= and --extra-lib-dirs= to specify where it is.
I installed the Haskell Platform 2014.2.0.0 for Windows 64-bit. It is on my path. I read someplace about MinGW being necessary, and MinGW and MSYS are both installed and up-to-date as well and the bin and lib folders for them are on my path. I checked the locations on my path and found a libmsvctr.a and libkernel32.a in C:\MinGW\mingw32\lib (which is on my path).
I think I'm missing something, but I'm not seeing anything in the FAQ or on the support forum.
I'm not exactly sure why this works. I'm guessing it has to do with dependencies (perhaps down to a version), but the issue was in my PATH environment variables. Haskell Platform comes with MinGW. When I moved Haskell Platform's directories above my MinGW directories in my PATH environment variable, things started to work.
My MinGW is fully installed and up-to-date (at least as far as I can tell), so it may be the Haskell Platform has a dependency that's not a standard part of MinGW or has a dependency on specific versions of tools. Either way, moving the Haskell Platform directories (including the MinGW that comes with Haskell Platform) up first in my PATH variables resolved the issues.