[gnome-continuous-yocto/gnomeostree-3.28-rocko: 7414/8267] systemd-boot: Make EFI_CC overridable

[Emmanuele Bassi <ebassi src gnome org>]

commit 5ad6333911c8dfb399a94dea37a5188fbf35a2d4
Author: Khem Raj <raj khem gmail com>
Date:   Thu Aug 24 12:17:41 2017 -0700

    systemd-boot: Make EFI_CC overridable
    
    Some layers may be setting their own EFI_CC
    keep that possibility open
    
    (From OE-Core rev: 4898d1883ae300ade52633109fa7dc3f6e208e14)
    
    Signed-off-by: Khem Raj <raj khem gmail com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 meta/recipes-core/systemd/systemd-boot_234.bb |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/meta/recipes-core/systemd/systemd-boot_234.bb b/meta/recipes-core/systemd/systemd-boot_234.bb
index ed55e53..655797f 100644
--- a/meta/recipes-core/systemd/systemd-boot_234.bb
+++ b/meta/recipes-core/systemd/systemd-boot_234.bb
@@ -8,13 +8,14 @@ SRC_URI += "file://0007-use-lnr-wrapper-instead-of-looking-for-relative-opti.pat
 inherit autotools pkgconfig gettext
 inherit deploy
 
-export EFI_CC="${CC}"
+EFI_CC ?= "${CC}"
 # Man pages are packaged through the main systemd recipe
 EXTRA_OECONF = " --enable-gnuefi \
                  --with-efi-includedir=${STAGING_INCDIR} \
                  --with-efi-ldsdir=${STAGING_LIBDIR} \
                  --with-efi-libdir=${STAGING_LIBDIR} \
                  --disable-manpages \
+                 EFI_CC='${EFI_CC}' \
                "
 
 # Imported from the old gummiboot recipe