bpfilter: check if $(CC) can link static libc in Kconfig (b1183b6d) · Commits · 戴 / test

On Fedora, linking static glibc requires the glibc-static RPM package, which is not part of the glibc-devel package. CONFIG_CC_CAN_LINK does not check the capability of static linking, so you can enable CONFIG_BPFILTER_UMH, then fail to build: HOSTLD net/bpfilter/bpfilter_umh /usr/bin/ld: cannot find -lc collect2: error: ld returned 1 exit status Add CONFIG_CC_CAN_LINK_STATIC, and make CONFIG_BPFILTER_UMH depend on it. Reported-by:

Valdis Kletnieks <valdis.kletnieks@vt.edu> Signed-off-by:

Masahiro Yamada <masahiroy@kernel.org> Acked-by:

Alexei Starovoitov <ast@kernel.org>

init/Kconfig

+5 −0

Original line number	Diff line number	Diff line
		@@ -49,6 +49,11 @@ config CC_CAN_LINK
		default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) $(m64-flag)) if 64BIT
		default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) $(m32-flag))

		config CC_CAN_LINK_STATIC
		bool
		default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) -static $(m64-flag)) if 64BIT
		default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) -static $(m32-flag))

		config CC_HAS_ASM_GOTO
		def_bool $(success,$(srctree)/scripts/gcc-goto.sh $(CC))

net/bpfilter/Kconfig

+1 −1

Original line number	Diff line number	Diff line
		@@ -9,7 +9,7 @@ menuconfig BPFILTER
		if BPFILTER
		config BPFILTER_UMH
		tristate "bpfilter kernel module with user mode helper"
		depends on CC_CAN_LINK
		depends on CC_CAN_LINK_STATIC
		default m
		help
		This builds bpfilter kernel module with embedded user mode helper

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