warp is an open-source preprocessor for the C and C++ programming
languages. We use it at Facebook as a faster replacement of cpp,
GNU's preprocessor.
The companion program warpdrive drives warp in conjunction with
the predefined macros of a few of today's crop of compilers (gcc
4.7.1, gcc 4.8.1, clang 3.2, and clang 3.4).
Currently warp's build has only been tested on CentOS 6. More
officially supported OSs to follow.
You need a D compiler installation, which can be downloaded from here. For maximum speed we recommend using the gdc compiler.
warp by itself is agnostic of the C or C++ dialect implemented by a
particular compiler. It is common for compilers to implicitly define a
number of macros that affect the precompilation process. To help with
that, warp is accompanied by warpdrive, a simple driver program that
invokes warp with the appropriate #defines for a few popular
compilers.
To build warp, use the simple Makefile that's part of the distribution:
make -j
This will produce warp (the core program) and also the drivers
warpdrive_gcc4_7_1, warpdrive_gcc4_8_1, warpdrive_clang3_2,
warpdrive_clang3_4, and warpdrive_clangdev, each packaged for the
respective compiler and version.
To invoke warp, simply use
warpdrive <flags> filename
In all likelihood you'll need to use -I for adding paths to included
library files (warpdrive doesn't bake those in.)