[OE-core] [PATCH] bitbake.conf: require conf/multiconfig/${BB_CURRENT_MC}.conf

[Juro Bystricky]

Presently there is no check to verify the existence of configuration
files as listed in BBMULTICONFIG.
For example, BBMULTICONFIG = "foobar" in local.conf does not trigger
an error or even a warning when there is no conf/multiconfig/foobar.conf.
The missing file is silently ignored.

This patch changes the inclusion of all multiconfig configuration files as
a non-optional requirement. If the file is missing, we get an error such as:

ERROR: ParseError at /data/master-multi/poky/meta/conf/bitbake.conf:704: Could not include required file conf/multiconfig/foobar.conf

Although the "default" configuration is not listed in BBMULTICONFIG,
this change also requires the file multiconfig/default.conf to exist.
The "default" (non-multiconfig) configuration is normally configured via local.conf,
so although this file is required, it can/should be empty. This patch creates
an empty file default.conf in meta/conf/multiconfig.

[YOCTO#10917]

Signed-off-by: Juro Bystricky <juro.bystricky at intel.com>
---
 meta/conf/bitbake.conf             | 2 +-
 meta/conf/multiconfig/default.conf | 0
 2 files changed, 1 insertion(+), 1 deletion(-)
 create mode 100644 meta/conf/multiconfig/default.conf

diff --git a/meta/conf/bitbake.conf b/meta/conf/bitbake.conf
index 40efb95..c8516a8 100644
--- a/meta/conf/bitbake.conf
+++ b/meta/conf/bitbake.conf
@@ -701,7 +701,7 @@ require conf/abi_version.conf
 include conf/site.conf
 include conf/auto.conf
 include conf/local.conf
-include conf/multiconfig/${BB_CURRENT_MC}.conf
+require conf/multiconfig/${BB_CURRENT_MC}.conf
 include conf/build/${BUILD_SYS}.conf
 include conf/target/${TARGET_SYS}.conf
 include conf/machine/${MACHINE}.conf
diff --git a/meta/conf/multiconfig/default.conf b/meta/conf/multiconfig/default.conf
new file mode 100644
index 0000000..e69de29
-- 
2.7.4