kepka/cotire/Patches/README.md

This directory contains patch files to enable cotire for some popular open sources packages that use CMake as a build system.

For example, to apply Cotire to LLVM 3.0, first copy cotire.cmake to a directory on the CMake module search path (e.g., llvm-3.0.src/cmake/modules).

Then apply the corresponding patch:

$ cd /path/to/llvm-3.0.src
$ patch -p1 < /path/to/llvm-3.0.src.patch

Then proceed with an out-of-source CMake build:

$ mkdir build; cd build
$ cmake ..
-- The C compiler identification is GNU 4.2.1
-- The CXX compiler identification is Clang 3.1.0
...
$ make
[  0%] Generating C unity source lib/Support/cotire/LLVMSupport_C_unity.c
[  0%] Generating CXX unity source lib/Support/cotire/LLVMSupport_CXX_unity.cxx
[  0%] Generating CXX prefix header lib/Support/cotire/LLVMSupport_CXX_prefix.hxx
[  0%] Building CXX precompiled header lib/Support/cotire/LLVMSupport_CXX_prefix.hxx.gch
...