Handle location.hh, position.hh, and stack.hh

[nicmcd]

rules_bison/bison/bison.bzl

Line 70 in 85e9bab

out_src = ctx.actions.declare_file("{}.{}".format(ctx.attr.name, out_src_ext))

I have a bison ypp that uses both %defines and %locations, thus these files should be generated per https://www.gnu.org/software/bison/manual/html_node/C_002b_002b-Bison-Interface.html. Have you thought about how to handle these files? Otherwise, the compilation process won't work because the output source file contains # include "location.hh"

[jmillikin]

Definitions are handled by setting the --defines flag, and the resulting generated header file is available to dependent targets.

The GNU Bison flag --locations doesn't support passing in the path to the locations header output, so it's difficult to use that functionality from within Bazel. If a future version of Bison supports argv-specified location.hh paths, then rules_bison could support it.