cmake: expand DTC version regex

DTC can be built with both traditional Makefiles or Meson. When built
with Makefiles the --version output looks like 'Version: DTC
1.6.1-dirty' but when built with Meson the output is 'Version: DTC
v1.6.1+.

This fails to match the version regex and the cmake then fails:

CMake Error at cmake/host-tools.cmake:28 (if):
  if given arguments:
    "VERSION_GREATER" "1.4.6"
  Unknown arguments specified

Expanding the regex with an optional 'v' covers both cases and the build
succeeds.

Signed-off-by: Ross Burton <ross.burton@arm.com>
This commit is contained in:
Ross Burton 2021-11-15 14:01:47 +00:00 committed by Christopher Friedt
commit a4da64033d

View file

@ -20,7 +20,7 @@ if(DTC)
)
if(${dtc_status} EQUAL 0)
string(REGEX MATCH "Version: DTC ([0-9]+[.][0-9]+[.][0-9]+).*" out_var ${dtc_version_output})
string(REGEX MATCH "Version: DTC v?([0-9]+[.][0-9]+[.][0-9]+).*" out_var ${dtc_version_output})
# Since it is optional, an outdated version is not an error. If an
# outdated version is discovered, print a warning and proceed as if