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Message-Id: <1610660990-18812-1-git-send-email-jjohnson@codeaurora.org>
Date: Thu, 14 Jan 2021 13:49:50 -0800
From: Jeff Johnson <jjohnson@...eaurora.org>
To: linux-kbuild@...r.kernel.org
Cc: psodagud@...cinc.com, eberman@...cinc.com, ndesaulniers@...gle.com,
Mahesh Kumar Kalikot Veetil <mkalikot@...eaurora.org>,
Jeff Johnson <jjohnson@...eaurora.org>,
Masahiro Yamada <masahiroy@...nel.org>,
Michal Marek <michal.lkml@...kovi.net>,
linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/2] kbuild: handle excessively long argument lists
From: Mahesh Kumar Kalikot Veetil <mkalikot@...eaurora.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@...eaurora.org>
Signed-off-by: Jeff Johnson <jjohnson@...eaurora.org>
---
Changes in v2:
- Remove spurious endif
scripts/Makefile.build | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 252b7d2..787dca2 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -425,7 +425,10 @@ $(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
$(multi-used-m): FORCE
$(call if_changed,link_multi-m)
--
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