Flag for omitting generated files for libswiftnav?

[mookerji]

Somehow it seems that a plover file gets deleted/removed during the make process. This then causes build problems that I don't really know how to solve. Can we have a default build option that doesn't rely on it to get built?

Found Haskell tools. Adding code generation step (to be run if Haskell subproject is modified).

-- Configuring done
CMake Warning (dev):
  Policy CMP0042 is not set: MACOSX_RPATH is enabled by default.  Run "cmake
  --help-policy CMP0042" for policy details.  Use the cmake_policy command to
  set the policy and suppress this warning.

  MACOSX_RPATH is not specified for the following targets:

   swiftnav

This warning is for project developers.  Use -Wno-dev to suppress it.

-- Generating done
-- Build files have been written to: /Users/mookerji/Dropbox/Documents/swift/libswiftnav/cmake
[  0%] Built target arithchk
[  0%] Generating arith.h
Scanning dependencies of target f2c
[  1%] Building C object clapack-3.2.1-CMAKE/F2CLIBS/libf2c/CMakeFiles/f2c.dir/uninit.c.o
Linking C static library libf2c.a
[ 13%] Built target f2c
[ 19%] Built target blas
[ 86%] Built target lapack
[ 92%] Built target cblas
Scanning dependencies of target generate
[ 93%] Generating ../../src/plover/ambiguity_test.c, ../../include/libswiftnav/plover/ambiguity_test.h
Package has never been configured. Configuring with default flags. If this
fails, please run configure manually.
Warning: The package list for 'hackage.haskell.org' is 126 days old.
Run 'cabal update' to get the latest list of available packages.
Resolving dependencies...
Configuring libswiftnav-generate-0.1.0.0...
cabal: At least the following dependencies are missing:
plover -any
make[2]: *** [../src/plover/ambiguity_test.c] Error 1
make[1]: *** [plover/CMakeFiles/generate.dir/all] Error 2
make: *** [all] Error 2

@fnoble @kovach