id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc	difficulty	ghcversion	platform
793	On OS X, warn about filenames that only differ in case	tibbe		"I managed to make Cabal fail to build a project by having

{{{
Name:                hamt
Version:             0.1
License:             BSD3
License-file:        LICENSE
Author:              Johan Tibell
Maintainer:          johan.tibell@gmail.com
Category:            Data
Build-type:          Simple
Cabal-version:       >=1.2

Library
  Exposed-modules: HAMT
  Other-modules: PopCount
  Build-depends: base, vector
  C-sources: popcount.c
}}}

The result was:

{{{
Building hamt-0.1...
[1 of 2] Compiling PopCount         ( PopCount.hs, dist/build/PopCount.o )
ld: duplicate symbol _popcount in dist/build/popcount.o and dist/build/PopCount.o for inferred architecture i386
}}}

`_popcount` is only defined in `popcount.c`. Looking in `dist/` showed that there was only a popcount.o there (from the C file). Renaming `popcount.c` to `popc.c` solved the problem.

Cabal ought to warn in this case.
"	defect	new	normal		Cabal library	1.8.0.6	normal				unknown