Build uses wrong libreadline when using homebrew

[frankcarey]

I'm using boxen on OSX 10.9 and (for some stupid reason) it puts homebrew in /opt/boxen/homebrew/ instead of the default /usr/local

When I use the torch7 easyinstall script at https://github.com/torch/ezinstall/blob/master/install-luajit%2Btorch I get the following error:

... // See https://github.com/torch/ezinstall/issues/27 for full output
[ 73%] Building ASM object luajit/CMakeFiles/luajit.dir/lj_vm.s.o
Linking C executable luajit
Undefined symbols for architecture x86_64:
  "_rl_completion_suppress_append", referenced from:
      _lua_rl_complete in luajit.c.o
ld: symbol(s) not found for architecture x86_64

I grepped the ./build/CMakeCache.txt file and found it was trying to use the OSX default /usr/lib/libreadline.dylib (which symlinks to libedit) instead of the one I installed and linked with homebrew.

READLINE_readline_LIBRARY:FILEPATH=/usr/lib/libreadline.dylib

To finally fix it, I just symlinked the homebrew lib folder into the place where it usually is (/usr/local/lib) deleted the whole gitfolder and reran the script. Then, all was well and it completed successfully.

My question is how to better handle this use-case? Is there a way to specify the location of the proper file?

[soumith]

we could put a version check on getting the proper readline.

[jcrosby]

I just ran into this same bug on OSX 10.10.3, also with the boxen-configured homebrew using /opt/boxen/homebrew.