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| author | Masahiro Yamada <masahiroy@kernel.org> | 2022-04-06 18:30:20 +0300 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2022-05-07 21:16:59 +0300 |
| commit | 9413e7640564fe70b24ea1a9ff3fb92c5bb52fcb (patch) | |
| tree | efb106529373b6c24577df146c8e3afc90fe0e8e /scripts/Makefile.build | |
| parent | b3591e061919c837c14680c1ceff8f009ed0afb4 (diff) | |
| download | linux-9413e7640564fe70b24ea1a9ff3fb92c5bb52fcb.tar.xz | |
kbuild: split the second line of *.mod into *.usyms
The *.mod files have two lines; the first line lists the member objects
of the module, and the second line, if CONFIG_TRIM_UNUSED_KSYMS=y, lists
the undefined symbols.
Currently, we generate *.mod after constructing composite modules,
otherwise, we cannot compute the second line. No prerequisite is
required to print the first line.
They are orthogonal. Splitting them into separate commands will ease
further cleanups.
This commit splits the list of undefined symbols out to *.usyms files.
Previously, the list of undefined symbols ended up with a very long
line, but now it has one symbol per line.
Use sed like we did before commit 7d32358be8ac ("kbuild: avoid split
lines in .mod files").
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
Diffstat (limited to 'scripts/Makefile.build')
| -rw-r--r-- | scripts/Makefile.build | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/scripts/Makefile.build b/scripts/Makefile.build index 857329844789..6ae92d119dfa 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -85,7 +85,8 @@ ifdef need-builtin targets-for-builtin += $(obj)/built-in.a endif -targets-for-modules := $(patsubst %.o, %.mod, $(filter %.o, $(obj-m))) +targets-for-modules := $(foreach x, mod $(if $(CONFIG_TRIM_UNUSED_KSYMS), usyms), \ + $(patsubst %.o, %.$x, $(filter %.o, $(obj-m)))) ifneq ($(CONFIG_LTO_CLANG)$(CONFIG_X86_KERNEL_IBT),) targets-for-modules += $(patsubst %.o, %.prelink.o, $(filter %.o, $(obj-m))) @@ -256,9 +257,6 @@ endif ifdef CONFIG_TRIM_UNUSED_KSYMS cmd_gen_ksymdeps = \ $(CONFIG_SHELL) $(srctree)/scripts/gen_ksymdeps.sh $@ >> $(dot-target).cmd - -# List module undefined symbols -undefined_syms = $(NM) $< | $(AWK) '$$1 == "U" { printf("%s%s", x++ ? " " : "", $$2) }'; endif define rule_cc_o_c @@ -305,14 +303,17 @@ $(obj)/%.prelink.o: $(obj)/%.o FORCE $(call if_changed,cc_prelink_modules) endif -cmd_mod = { \ - echo $(addprefix $(obj)/, $(call real-search, $*.o, .o, -objs -y -m)); \ - $(undefined_syms) echo; \ - } > $@ +cmd_mod = echo $(addprefix $(obj)/, $(call real-search, $*.o, .o, -objs -y -m)) > $@ $(obj)/%.mod: $(obj)/%$(mod-prelink-ext).o FORCE $(call if_changed,mod) +# List module undefined symbols +cmd_undefined_syms = $(NM) $< | sed -n 's/^ *U //p' > $@ + +$(obj)/%.usyms: $(obj)/%$(mod-prelink-ext).o FORCE + $(call if_changed,undefined_syms) + quiet_cmd_cc_lst_c = MKLST $@ cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \ $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \ |