Fix LTO support for cross-compilation. #14
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When cross-compiling, the ar and ranlib to be used for LTO are prefixed by the cross-tuple. gcc-ar and gcc-ranlib may not exist. Cfr. http://autobuild.buildroot.net/results/f3c/f3c48da3a9706cd366c0e0a96c3cd0ff959f2a78/ Therefore, search for an appropriate lto-ar and lto-ranlib before enabling LTO. Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
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When cross-compiling, the ar and ranlib to be used for LTO are prefixed
by the cross-tuple. gcc-ar and gcc-ranlib may not exist. Cfr.
http://autobuild.buildroot.net/results/f3c/f3c48da3a9706cd366c0e0a96c3cd0ff959f2a78/
Therefore, search for an appropriate lto-ar and lto-ranlib before
enabling LTO.