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由 Joe Lawrence 提交于
CC_FLAGS_FTRACE may contain trailing whitespace that interferes with findstring. For example, commit 6977f95e ("powerpc: avoid -mno-sched-epilog on GCC 4.9 and newer") introduced a change such that on my ppc64le box, CC_FLAGS_FTRACE="-pg -mprofile-kernel ". (Note the trailing space.) When cmd_record_mcount is now invoked, findstring fails as the ftrace flags were found at very end of _c_flags, without the trailing space. _c_flags=" ... -pg -mprofile-kernel" CC_FLAGS_FTRACE="-pg -mprofile-kernel " ^ findstring is looking for this extra space Remove the redundant whitespaces from CC_FLAGS_FTRACE in cmd_record_mcount to avoid this problem. [masahiro.yamada: This issue only happens in the released versions of GNU Make. CC_FLAGS_FTRACE will not contain the trailing space if you use the latest GNU Make, which contains commit b90fabc8d6f3 ("* NEWS: Do not insert a space during '+=' if the value is empty.") ] Suggested-by: Masahiro Yamada <yamada.masahiro@socionext.com> (refactoring) Fixes: 6977f95e ("powerpc: avoid -mno-sched-epilog on GCC 4.9 and newer"). Signed-off-by: NJoe Lawrence <joe.lawrence@redhat.com> Acked-by: NSteven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
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