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kbuild: Fix running modpost with musl libc

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commit 3d57e1b7b1 ("kbuild: refactor the prerequisites of the modpost
rule") moved 'vmlinux.o' inside modpost-args, possibly before some of
the other options. However, getopt() in musl libc follows POSIX and
stops looking for options upon reaching the first non-option argument.
As a result, the '-T' option is misinterpreted as a positional argument,
and the build fails:

  make -f ./scripts/Makefile.modpost
     scripts/mod/modpost   -E   -o Module.symvers vmlinux.o -T modules.order
  -T: No such file or directory
  make[1]: *** [scripts/Makefile.modpost:137: Module.symvers] Error 1
  make: *** [Makefile:1960: modpost] Error 2

The fix is to move all options before 'vmlinux.o' in modpost-args.

Fixes: 3d57e1b7b1 ("kbuild: refactor the prerequisites of the modpost rule")
Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Samuel Holland 2022-12-27 15:48:21 -06:00 committed by Masahiro Yamada
parent 9c9b55a594
commit 63ffe00d8c
1 changed files with 11 additions and 11 deletions
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22
scripts/Makefile.modpost
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@ -55,6 +55,17 @@ ifneq ($(findstring i,$(filter-out --%,$(MAKEFLAGS))),)
modpost-args += -n
endif
ifneq ($(KBUILD_MODPOST_WARN)$(missing-input),)
modpost-args += -w
endif
# Read out modules.order to pass in modpost.
# Otherwise, allmodconfig would fail with "Argument list too long".
ifdef KBUILD_MODULES
modpost-args += -T $(MODORDER)
modpost-deps += $(MODORDER)
endif
ifeq ($(KBUILD_EXTMOD),)
# Generate the list of in-tree objects in vmlinux
@ -113,17 +124,6 @@ modpost-args += -e $(addprefix -i , $(KBUILD_EXTRA_SYMBOLS))
endif # ($(KBUILD_EXTMOD),)
ifneq ($(KBUILD_MODPOST_WARN)$(missing-input),)
modpost-args += -w
endif
ifdef KBUILD_MODULES
modpost-args += -T $(MODORDER)
modpost-deps += $(MODORDER)
endif
# Read out modules.order to pass in modpost.
# Otherwise, allmodconfig would fail with "Argument list too long".
quiet_cmd_modpost = MODPOST $@
cmd_modpost = \
$(if $(missing-input), \