tree c15605b695f68208ed9939c042135fcf1a5f3496
parent 3681ade2c7bfb2e4befee1ff6909608752f91d92
author Nathan Rossi <nathan@nathanrossi.com> 1535979003 +1000
committer Nathan Rossi <nathan@nathanrossi.com> 1535980286 +1000

icetime: Add support for searching for chipdb relative to binary

Like yosys and arachne-pnr, allow for searching for the desired chipdb
file relative to the executing binaries directory. This allows for
portable builds of icetime without needing to specify the exact path to
the needed chipdb file with the -C arg.

In order to support this icetime must be able to get the
"proc_self_dirname" path just like yosys and arachne-pnr. As such copy
the equivalent code to get this path information. To avoid cluttering
the icetime.cc file with this code, place it in a separate iceutil.cc
file.

Signed-off-by: Nathan Rossi <nathan@nathanrossi.com>