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authorLinus Torvalds <torvalds@linux-foundation.org>2023-01-21 10:56:37 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2023-01-21 10:56:37 -0800
commit83cd5fd014c0abfd3cf6d8e4189333d099630845 (patch)
tree7c1b49df8318674bd5da15eda2e7fbe26e7a9aeb /Makefile
parentf3bbac32475b27f49be201f896d98d4009de1562 (diff)
parent13e1df09284da53ae5abdd3364c36caf8f0f8916 (diff)
Merge tag 'kbuild-fixes-v6.2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild fixes from Masahiro Yamada: - Hide LDFLAGS_vmlinux from decompressor Makefiles to fix error messages when GNU Make 4.4 is used. - Fix 'make modules' build error when CONFIG_DEBUG_INFO_BTF_MODULES=y. - Fix warnings emitted by GNU Make 4.4 in scripts/kconfig/Makefile. - Support GNU Make 4.4 for scripts/jobserver-exec. - Show clearer error message when kernel/gen_kheaders.sh fails due to missing cpio. * tag 'kbuild-fixes-v6.2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: kheaders: explicitly validate existence of cpio command scripts: support GNU make 4.4 in jobserver-exec kconfig: Update all declared targets scripts: rpm: make clear that mkspec script contains 4.13 feature init/Kconfig: fix LOCALVERSION_AUTO help text kbuild: fix 'make modules' error when CONFIG_DEBUG_INFO_BTF_MODULES=y kbuild: export top-level LDFLAGS_vmlinux only to scripts/Makefile.vmlinux init/version-timestamp.c: remove unneeded #include <linux/version.h> docs: kbuild: remove mention to dropped $(objtree) feature
Diffstat (limited to 'Makefile')
-rw-r--r--Makefile15
1 files changed, 14 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index e09fe100efb2..33a4e312b66d 100644
--- a/Makefile
+++ b/Makefile
@@ -549,7 +549,7 @@ LDFLAGS_MODULE =
CFLAGS_KERNEL =
RUSTFLAGS_KERNEL =
AFLAGS_KERNEL =
-export LDFLAGS_vmlinux =
+LDFLAGS_vmlinux =
# Use USERINCLUDE when you must reference the UAPI directories only.
USERINCLUDE := \
@@ -1248,6 +1248,18 @@ vmlinux.o modules.builtin.modinfo modules.builtin: vmlinux_o
@:
PHONY += vmlinux
+# LDFLAGS_vmlinux in the top Makefile defines linker flags for the top vmlinux,
+# not for decompressors. LDFLAGS_vmlinux in arch/*/boot/compressed/Makefile is
+# unrelated; the decompressors just happen to have the same base name,
+# arch/*/boot/compressed/vmlinux.
+# Export LDFLAGS_vmlinux only to scripts/Makefile.vmlinux.
+#
+# _LDFLAGS_vmlinux is a workaround for the 'private export' bug:
+# https://savannah.gnu.org/bugs/?61463
+# For Make > 4.4, the following simple code will work:
+# vmlinux: private export LDFLAGS_vmlinux := $(LDFLAGS_vmlinux)
+vmlinux: private _LDFLAGS_vmlinux := $(LDFLAGS_vmlinux)
+vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_vmlinux)
vmlinux: vmlinux.o $(KBUILD_LDS) modpost
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux
@@ -1533,6 +1545,7 @@ endif
# *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFOBTF_MODULES
# is an exception.
ifdef CONFIG_DEBUG_INFO_BTF_MODULES
+KBUILD_BUILTIN := 1
modules: vmlinux
endif