# make sure that a predefined CFLAGS variable does not disturb packages
export CFLAGS=
+unexport TAR_OPTIONS
+
ifneq ($(shell $(HOSTCC) 2>&1 | grep clang),)
export HOSTCC_REAL?=$(HOSTCC)
export HOSTCC_WRAPPER:=$(TOPDIR)/scripts/clang-gcc-wrapper
kernel_nconfig: prepare_kernel_conf
$(_SINGLE)$(NO_TRACE_MAKE) -C target/linux nconfig
-tmp/.prereq-build: include/prereq-build.mk
+tmp/.prereq-build: $(if $(SDK),.git/config) include/prereq-build.mk
mkdir -p tmp
rm -f tmp/.host.mk
@$(_SINGLE)$(NO_TRACE_MAKE) -j1 -r -s -f $(TOPDIR)/include/prereq-build.mk prereq 2>/dev/null || { \