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ANDROID: kbuild: speed up ksym_dep_filter

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This commit reduces the input that tr and sed need to consider to a
few lines and so makes the extraction of ksyms faster.

On my machine at least, builds are greatly slowed down by tr.

A single invocation of sed might be fast too but seems non-trivial.

Bug: 174773617
Change-Id: I98698ff8603d816c55d4922ccb5936364b5fd906
Signed-off-by: Giuliano Procida <gprocida@google.com>
This commit is contained in:
Giuliano Procida 2020-11-23 16:16:11 +00:00
parent 1309a09163
commit 6a2d28f7ba
1 changed files with 1 additions and 1 deletions
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scripts/Kbuild.include
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@ -290,7 +290,7 @@ ksym_dep_filter = \
$(CPP) $(call flags_nodeps,a_flags) -D__KSYM_DEPS__ $< ;; \
boot*|build*|cpp_its_S|*cpp_lds_S|dtc|host*|vdso*) : ;; \
*) echo "Don't know how to preprocess $(1)" >&2; false ;; \
esac | tr ";" "\n" | sed -n 's/^.*=== __KSYM_\(.*\) ===.*$$/_\1/p'
esac | fgrep '=== __KSYM_' | tr ";" "\n" | sed -n 's/^.*=== __KSYM_\(.*\) ===.*$$/_\1/p'
cmd_and_fixdep = \
$(echo-cmd) $(cmd_$(1)); \