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,→forcing compile as 32bit, i386 on os x
* replace occurrences of x86_64 with i386:
<code> grep -l -r0 -e"x86_64" * | xargs sed -i "" 's/x86_64/i386/g' </code>
=== finding things with ls and grep ===
* find this filename in a recursive search and show previous 30 lines of result:
<code>ls -laR . | grep -b30 "scale_signal.o" </code>
