All of the source code for fossil is contained in the src/ subdirectory.
But there is a lot of generated code, so you will probably want to
use the Makefile.  To do a complete build, just type:
use the Makefile.  To do a complete build on unix, just type:

   make

That should work out-of-the-box on Macs and Linux systems. If you are
building on a Windows box, install MinGW as well as MinGW's make (or
On a windows box, use one of the Makefiles in the win/ subdirectory,
MSYS). You can then type:
according to your compiler and environment.  For example:

   make -f Makefile.w32
   make -f win/Makefile.w32

If you have trouble, or you want to do something fancy, just look at
top level makefile. There are 6 configuration options that are all well
commented. Instead of editing the Makefile, consider copying the Makefile
to an alternative name such as "GNUMakefile", "BSDMakefile", or "makefile"
and editing the copy.

Out of source builds?

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BUILDING OUTSIDE THE SOURCE TREE

An out of source build is pretty easy:

  1. Make a new directory to do the builds in.
  2. Copy "Makefile" from the source into the build directory and
  modify the SRCDIR macro along the lines of: