Revert "Dockerfile.gcc: re-enable docker cache"

enabling docker cache does not work and the sbom is now created
totally different

This reverts commit cc3e98a.

Signed-off-by: Christoph Ostarek <[email protected]>

Dockerfile.gcc

@@ -1,4 +1,4 @@
-#syntax=docker/dockerfile:1.9.0-labs
+#syntax=docker/dockerfile:1.6
 ARG ALPINE_VERSION=3.16
 ARG KERNEL_CONFIG=eve_defconfig
 ARG KERNEL_BIN=arch/x86/boot/bzImage
@@ -81,9 +81,7 @@ ARG LOCALVERSION
 # ARCH and CROSS_COMPILE are inherited from builder-${TARGETARCH}-${BUILDARCH}
 # ARCH is always set to the target arch
 # CROSS_COMPILE is set to empty string for native builds
-RUN mkdir /kernel-src
-COPY --exclude=kernel-sbom-*.json . /kernel-src
-
+COPY . /kernel-src
 WORKDIR /kernel-src
 
 RUN sed -i Makefile -e 's/--build-id=sha1/--build-id=none/g'
@@ -177,7 +175,4 @@ FROM scratch
 ENTRYPOINT []
 CMD []
 WORKDIR /
-# copy SBOM files
-COPY kernel-sbom-docker.spdx.json /
-COPY kernel-sbom-gh.spdx.json /
 COPY --from=artifacts /out/* /

Makefile.eve

@@ -13,7 +13,7 @@ LINUXKIT_VERSION=58c36c9eb0c32acf66ae7877d18a9ad24d59d73e
 GOBIN=/tmp/linuxkit-$(LINUXKIT_VERSION)
 LK=$(GOBIN)/linuxkit
 
-BUILD_KIT_VERSION=v0.15.2
+BUILD_KIT_VERSION=v0.12.5
 BUILD_KIT_BUILDER=eve-kernel-builder-$(BUILD_KIT_VERSION)
 
 SOURCE_DATE_EPOCH=$(shell git log -1 --format=%ct)