license.bbclass: canonicalise licenses when dealing with INCOMPATIBLE_LICENSE

If INCOMPATIBLE_LICENSE=GPL-3.0 but the recipe sets LICENSE=GPLv3, the current
code won't trigger because they're different strings.

Fix this by attempting to canonicalise every license name to a SPDX name, so
both names in this example become GPL-3.0.

[ YOCTO #5622 ]

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 11 insertions, 3 deletions

diff --git a/meta/classes/license.bbclass b/meta/classes/license.bbclass
index 2a6e869736..601f5611cc 100644
--- a/meta/classes/license.bbclass
+++ b/meta/classes/license.bbclass
@@ -264,10 +264,18 @@ def return_spdx(d, license):
      """
     return d.getVarFlag('SPDXLICENSEMAP', license, True)
 
+def canonical_license(d, license):
+    """
+    Return the canonical (SPDX) form of the license if available (so GPLv3
+    becomes GPL-3.0), or the passed license if there is no canonical form.
+    """
+    return d.getVarFlag('SPDXLICENSEMAP', license, True) or license
+
 def incompatible_license(d, dont_want_licenses, package=None):
     """
-    This function checks if a recipe has only incompatible licenses. It also take into consideration 'or'
-    operand.
+    This function checks if a recipe has only incompatible licenses. It also
+    take into consideration 'or' operand.  dont_want_licenses should be passed
+    as canonical (SPDX) names.
     """
     import re
     import oe.license
@@ -298,7 +306,7 @@ def incompatible_license(d, dont_want_licenses, package=None):
         licenses = oe.license.flattened_licenses(license, choose_lic_set)
     except oe.license.LicenseError as exc:
         bb.fatal('%s: %s' % (d.getVar('P', True), exc))
-    return any(not license_ok(l) for l in licenses)
+    return any(not license_ok(canonical_license(d, l)) for l in licenses)
 
 def check_license_flags(d):
     """