diff options
| -rw-r--r-- | Makefile | 5 | ||||
| -rw-r--r-- | net/Makefile | 4 | ||||
| -rw-r--r-- | net/bpfilter/Makefile | 2 | ||||
| -rwxr-xr-x | scripts/cc-can-link.sh | 11 |
4 files changed, 22 insertions, 0 deletions
@@ -510,6 +510,11 @@ ifeq ($(call shell-cached,$(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $ KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO endif +ifeq ($(call shell-cached,$(CONFIG_SHELL) $(srctree)/scripts/cc-can-link.sh $(CC)), y) + CC_CAN_LINK := y + export CC_CAN_LINK +endif + ifeq ($(config-targets),1) # =========================================================================== # *config targets only - make sure prerequisites are updated, and descend diff --git a/net/Makefile b/net/Makefile index bdaf53925acd..13ec0d5415c7 100644 --- a/net/Makefile +++ b/net/Makefile @@ -20,7 +20,11 @@ obj-$(CONFIG_TLS) += tls/ obj-$(CONFIG_XFRM) += xfrm/ obj-$(CONFIG_UNIX) += unix/ obj-$(CONFIG_NET) += ipv6/ +ifneq ($(CC_CAN_LINK),y) +$(warning CC cannot link executables. Skipping bpfilter.) +else obj-$(CONFIG_BPFILTER) += bpfilter/ +endif obj-$(CONFIG_PACKET) += packet/ obj-$(CONFIG_NET_KEY) += key/ obj-$(CONFIG_BRIDGE) += bridge/ diff --git a/net/bpfilter/Makefile b/net/bpfilter/Makefile index 3f3cb87c668f..aafa72001fcd 100644 --- a/net/bpfilter/Makefile +++ b/net/bpfilter/Makefile @@ -6,6 +6,8 @@ hostprogs-y := bpfilter_umh bpfilter_umh-objs := main.o HOSTCFLAGS += -I. -Itools/include/ -Itools/include/uapi +HOSTCC := $(CC) + ifeq ($(CONFIG_BPFILTER_UMH), y) # builtin bpfilter_umh should be compiled with -static # since rootfs isn't mounted at the time of __init diff --git a/scripts/cc-can-link.sh b/scripts/cc-can-link.sh new file mode 100755 index 000000000000..208eb2825dab --- /dev/null +++ b/scripts/cc-can-link.sh @@ -0,0 +1,11 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 + +cat << "END" | $@ -x c - -o /dev/null >/dev/null 2>&1 && echo "y" +#include <stdio.h> +int main(void) +{ + printf(""); + return 0; +} +END |