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kbuild: fix ksym_dep_filter when multiple EXPORT_SYMBOL() on the same line 

In kernel/cgroup.c there is:

    #define SUBSYS(_x)                                             \
        DEFINE_STATIC_KEY_TRUE(_x ## _cgrp_subsys_enabled_key);    \
        DEFINE_STATIC_KEY_TRUE(_x ## _cgrp_subsys_on_dfl_key);     \
        EXPORT_SYMBOL_GPL(_x ## _cgrp_subsys_enabled_key);         \
        EXPORT_SYMBOL_GPL(_x ## _cgrp_subsys_on_dfl_key);

The expansion of this macro causes multiple EXPORT_SYMBOL_GPL() instances
to appear on the same preprocessor line output, confusing the sed script
expecting only one of them per line.  Unfortunately this can't be fixed
nicely in the sed script as sed's regexp can't do non greedy matching.

Fix this by turning any semicolon into a line break before filtering.

Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Michal Marek <mmarek@suse.com>
This commit is contained in:
Nicolas Pitre 2016-04-28 17:29:42 -04:00 committed by Michal Marek
parent e72e2dfe7c
commit f110e0fec8
1 changed files with 1 additions and 1 deletions
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2
scripts/Kbuild.include
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@ -281,7 +281,7 @@ ksym_dep_filter = \
$(CPP) $(call flags_nodeps,a_flags) -D__KSYM_DEPS__ $< ;; \
boot*|build*|*cpp_lds_S|dtc|host*|vdso*) : ;; \
*) echo "Don't know how to preprocess $(1)" >&2; false ;; \
esac | sed -rn 's/^.*=== __KSYM_(.*) ===.*$$/KSYM_\1/p'
esac | tr ";" "\n" | sed -rn 's/^.*=== __KSYM_(.*) ===.*$$/KSYM_\1/p'
cmd_and_fixdep = \
$(echo-cmd) $(cmd_$(1)); \