[PATCH v2] kunit: fix KconfigParseError handling CC_VERSION_TEXT

[Vitor Massaru Iha]

Commit 8b59cd81dc5 ("kbuild: ensure full rebuild when the compiler
is updated") added the environment variable CC_VERSION_TEXT,
parse_from_string() doesn't expect a string in value field and this
causes the failure below:
	
[iha@bbking linux]$ tools/testing/kunit/kunit.py run --timeout=60
[00:20:12] Configuring KUnit Kernel ...
Generating .config ...
Traceback (most recent call last):
  File "tools/testing/kunit/kunit.py", line 347, in <module>
    main(sys.argv[1:])
  File "tools/testing/kunit/kunit.py", line 257, in main
    result = run_tests(linux, request)
  File "tools/testing/kunit/kunit.py", line 134, in run_tests
    config_result = config_tests(linux, config_request)
  File "tools/testing/kunit/kunit.py", line 64, in config_tests
    success = linux.build_reconfig(request.build_dir, request.make_options)
  File "/home/iha/lkmp/linux/tools/testing/kunit/kunit_kernel.py", line 161, in build_reconfig
    return self.build_config(build_dir, make_options)
  File "/home/iha/lkmp/linux/tools/testing/kunit/kunit_kernel.py", line 145, in build_config
    return self.validate_config(build_dir)
  File "/home/iha/lkmp/linux/tools/testing/kunit/kunit_kernel.py", line 124, in validate_config
    validated_kconfig.read_from_file(kconfig_path)
  File "/home/iha/lkmp/linux/tools/testing/kunit/kunit_config.py", line 89, in read_from_file
    self.parse_from_string(f.read())
  File "/home/iha/lkmp/linux/tools/testing/kunit/kunit_config.py", line 85, in parse_from_string
    raise KconfigParseError('Failed to parse: ' + line)
kunit_config.KconfigParseError: Failed to parse: CONFIG_CC_VERSION_TEXT="gcc (GCC) 10.1.1 20200507 (Red Hat 10.1.1-1)"

Signed-off-by: Vitor Massaru Iha <vitor@xxxxxxxxxxx>
---
v2: 
 - maintains CC_VERSION_TEXT in the .config file to ensure full rebuild
   when the compiler is updated.
---
 tools/testing/kunit/kunit_config.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tools/testing/kunit/kunit_config.py b/tools/testing/kunit/kunit_config.py
index e75063d603b5..c407c7c6a2b0 100644
--- a/tools/testing/kunit/kunit_config.py
+++ b/tools/testing/kunit/kunit_config.py
@@ -81,6 +81,12 @@ class Kconfig(object):
 
 			if line[0] == '#':
 				continue
+
+			if 'CONFIG_CC_VERSION_TEXT' in line:
+				name, value = line.split('=')
+				entry = KconfigEntry(name, value)
+				self.add_entry(entry)
+				continue
 			else:
 				raise KconfigParseError('Failed to parse: ' + line)
 

base-commit: 7bf200b3a4ac10b1b0376c70b8c66ed39eae7cdd
-- 
2.26.2