Get cmake and home-brew to work together

Question

When I install libraries with homebrew cmake can't seem to find them. Is there a simple way to fix this for an arbitrary library installed with brew.

Accepted Answer

Default

By default brew's libraries installed to `/usr/local/lib` folder:

```
> ls /usr/local/lib/liblzma.dylib 
/usr/local/lib/liblzma.dylib@
```

Check that this path exists in CMAKE_SYSTEM_PREFIX_PATH variable. In this case find is trivial:

```
message("system: ${CMAKE_SYSTEM_PREFIX_PATH}")
find_library(LZMA_LIBRARY lzma)
message("lzma: ${LZMA_LIBRARY}")
```

Result:

```
system: /usr/local;/usr;/;...
lzma: /usr/local/lib/liblzma.dylib
```

Otherwise

If it is not you need to modify CMAKE_PREFIX_PATH or CMAKE_LIBRARY_PATH before find_library command:

```
list(APPEND CMAKE_PREFIX_PATH /usr/local)
```

Solution