[OE-core] [PATCH v2] efibootmgr: Pass correct flags to compiler from pkg-config

[Khem Raj]

efivar.h is in usr/include/efirvar directory so it should be
added to include search path via -I to compiler cmdline to fix

make[1]: *** No rule to make target 'efivar.h', needed by 'efibootmgr.o'.  Stop.
| make[1]: *** Waiting for unfinished jobs....

When running clang to generate dependencies -MM -MG -MF it still
parses the compile unit and complains if certain header is not found
where as gcc does not do that, hence the compile error is only seen
when compiling with clang.

FIx is use a weak default assignment for PKGS var which is used by
pkg-config to deduce compiler flags, this helps in getting right
-I flags even for dep step

Signed-off-by: Khem Raj <raj.khem at gmail.com>
Cc: Ross Burton <ross.burton at intel.com>
---
 ...failts-Set-PKGS-to-efivar-by-default.patch | 33 +++++++++++++++++++
 meta/recipes-bsp/efibootmgr/efibootmgr_17.bb  |  1 +
 2 files changed, 34 insertions(+)
 create mode 100644 meta/recipes-bsp/efibootmgr/efibootmgr/0001-Make.defailts-Set-PKGS-to-efivar-by-default.patch

diff --git a/meta/recipes-bsp/efibootmgr/efibootmgr/0001-Make.defailts-Set-PKGS-to-efivar-by-default.patch b/meta/recipes-bsp/efibootmgr/efibootmgr/0001-Make.defailts-Set-PKGS-to-efivar-by-default.patch
new file mode 100644
index 0000000000..415012d64c
--- /dev/null
+++ b/meta/recipes-bsp/efibootmgr/efibootmgr/0001-Make.defailts-Set-PKGS-to-efivar-by-default.patch
@@ -0,0 +1,33 @@
+From f6c3154810938506c13e22d16935ae4d07e911dc Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem at gmail.com>
+Date: Mon, 24 Jun 2019 22:27:21 -0700
+Subject: [PATCH] Make.defailts: Set PKGS to efivar by default
+
+This ensures that when make dep is run then pkg-config logic can add
+efivar related variables to cflags and ldflags
+
+Fixes
+make[1]: *** No rule to make target 'efivar.h', needed by 'efibootmgr.o'.  Stop.
+
+Upstream-Status: Pending
+Signed-off-by: Khem Raj <raj.khem at gmail.com>
+---
+ Make.defaults | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/Make.defaults b/Make.defaults
+index c4c0592..d75c6f4 100644
+--- a/Make.defaults
++++ b/Make.defaults
+@@ -32,7 +32,7 @@ AR	:= $(CROSS_COMPILE)gcc-ar
+ NM	:= $(CROSS_COMPILE)gcc-nm
+ RANLIB	:= $(CROSS_COMPILE)gcc-ranlib
+ 
+-PKGS	=
++PKGS	?= efivar
+ 
+ SUBDIR_CFLAGS ?=
+ clang_cflags =
+-- 
+2.22.0
+
diff --git a/meta/recipes-bsp/efibootmgr/efibootmgr_17.bb b/meta/recipes-bsp/efibootmgr/efibootmgr_17.bb
index 0e5a81e316..835c7b3b81 100644
--- a/meta/recipes-bsp/efibootmgr/efibootmgr_17.bb
+++ b/meta/recipes-bsp/efibootmgr/efibootmgr_17.bb
@@ -12,6 +12,7 @@ COMPATIBLE_HOST = "(i.86|x86_64|arm|aarch64).*-linux"
 
 SRC_URI = "git://github.com/rhinstaller/efibootmgr.git;protocol=https \
            file://0001-remove-extra-decl.patch \
+           file://0001-Make.defailts-Set-PKGS-to-efivar-by-default.patch \
           "
 SRCREV = "e067160ecef8208e1944002e5d50b275733211fb"
 
-- 
2.22.0