classes/license: fix handling of symlinks pointed to in LIC_FILES_CHKSUM

If you set LIC_FILES_CHKSUM to point to a relative symlink then you'll
get "Could not copy license file" warnings in copy_license_files() since
the symlink won't be valid after it's copied. If the source is a symlink
then we need to dereference it first.

I encountered this when I used recipetool on the sources for capnproto,
where the c++ directory contains a LICENSE.txt symlink to the LICENSE
file in the parent directory, and this symlink ends up being pointed to
in LIC_FILES_CHKSUM.

(From OE-Core rev: c4d3b1e9c37b920444e53d3231552da18d101882)

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

1 files changed, 2 insertions, 0 deletions

diff --git a/meta/classes/license.bbclass b/meta/classes/license.bbclass
index da4fc3e1d4..660b85f619 100644
--- a/meta/classes/license.bbclass
+++ b/meta/classes/license.bbclass
@@ -351,6 +351,8 @@ def copy_license_files(lic_files_paths, destdir):
             dst = os.path.join(destdir, basename)
             if os.path.exists(dst):
                 os.remove(dst)
+            if os.path.islink(src):
+                src = os.path.realpath(src)
             canlink = os.access(src, os.W_OK) and (os.stat(src).st_dev == os.stat(destdir).st_dev)
             if canlink:
                 try: