Messages in this thread | | | Date | Thu, 14 Jan 2021 13:32:45 -0800 | From | jjohnson@codeauro ... | Subject | Re: [PATCH 2/2] kbuild: handle excessively long argument lists |
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On 2021-01-14 13:07, Nick Desaulniers wrote: >> From: Mahesh Kumar Kalikot Veetil <mkalikot@codeaurora.org> >> >> Modules with a large number of compilation units may be >> exceeding AR and LD command argument list. Handle this gracefully by >> writing the long argument list in a file. The command line options >> read from file are inserted in place of the original @file option. >> >> The usage is well documented at >> https://www.gnu.org/software/make/manual/html_node/File-Function.html >> >> Signed-off-by: Mahesh Kumar Kalikot Veetil <mkalikot@codeaurora.org> >> Signed-off-by: Jeff Johnson <jjohnson@codeaurora.org> >> --- >> scripts/Makefile.build | 6 +++++- >> 1 file changed, 5 insertions(+), 1 deletion(-) >> >> diff --git a/scripts/Makefile.build b/scripts/Makefile.build >> index 252b7d2..d5ef345 100644 >> --- a/scripts/Makefile.build >> +++ b/scripts/Makefile.build >> @@ -425,7 +425,11 @@ $(obj)/lib.a: $(lib-y) FORCE >> # module is turned into a multi object module, $^ will contain header >> file >> # dependencies recorded in the .*.cmd file. >> quiet_cmd_link_multi-m = LD [M] $@ >> - cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ $(filter %.o,$^) >> + cmd_link_multi-m = \ >> + $(file >$@.in,$(filter %.o,$^)) \ >> + $(LD) $(ld_flags) -r -o $@ @$@.in; \ >> + rm -f $@.in >> +endif > > Was this build tested? > > $ make LLVM=1 LLVM_IAS=1 -j72 defconfig > scripts/Makefile.build:432: *** extraneous 'endif'. Stop. > make: *** [Makefile:535: scripts_basic] Error 2 > > (Please cc me on v2)
blush
It was tested on a workspace that also contains the Clang LTO series https://patchwork.kernel.org/project/linux-kbuild/patch/20201211184633.3213045-3-samitolvanen@google.com/
I messed up when trimming, will update in v2
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