[OE-core] [PATCH v2] u-boot.inc: Add host compiler flags and openssl-native dependency

[Nathan Rossi]

U-Boot will compile its own tools during the build, with specific
configurations (aka when CONFIG_FIT_SIGNATURE is enabled) the host tools
require openssl. This patch adds 'openssl' as a PACKAGECONFIG that
enables the use of openssl-native as a dependency and also adds the
HOSTCC flags that U-Boot uses when compiling the host tools.

Signed-off-by: Nathan Rossi <nathan at nathanrossi.com>
---
Changes in v2:
* Changed from using an unconditional DEPEND +=, to using PACKAGECONFIG with
  the "openssl" config and defaulting PACKAGECONFIG to enable the "openssl"
  config.
* Reworded the commit message and comments.
---
 meta/recipes-bsp/u-boot/u-boot.inc | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/meta/recipes-bsp/u-boot/u-boot.inc b/meta/recipes-bsp/u-boot/u-boot.inc
index 990ddb1..3d00b14 100644
--- a/meta/recipes-bsp/u-boot/u-boot.inc
+++ b/meta/recipes-bsp/u-boot/u-boot.inc
@@ -15,6 +15,13 @@ PACKAGE_ARCH = "${MACHINE_ARCH}"
 inherit uboot-config deploy
 
 EXTRA_OEMAKE = 'CROSS_COMPILE=${TARGET_PREFIX} CC="${TARGET_PREFIX}gcc ${TOOLCHAIN_OPTIONS}" V=1'
+EXTRA_OEMAKE += 'HOSTCC="${BUILD_CC} ${BUILD_CFLAGS} ${BUILD_LDFLAGS}"'
+
+PACKAGECONFIG ??= "openssl"
+# u-boot will compile its own tools during the build, with specific
+# configurations (aka when CONFIG_FIT_SIGNATURE is enabled) openssl is needed as
+# a host build dependency.
+PACKAGECONFIG[openssl] = ",,openssl-native"
 
 # Allow setting an additional version string that will be picked up by the
 # u-boot build system and appended to the u-boot version.  If the .scmversion
-- 
2.5.1