#!/bin/sed -f
# Hide functions with leading underscores.
# Used for patching the pcc-libs tree.
# Since we need to patch the line before the one that matches a pattern,
# we must use the hold space.
# Method:
#  hold/delete line one
#  if this line matches, swap for last line, modify pattern space, swap back
#  swap with last line, so we print it and save this line for next
#  at the end, print the prior line, then swap it for the last line
1{h;d}
/^_.*(.*)$/{x;s/^\(.*\)$/__attribute__((__visibility__("hidden"))) \1/;x}
2,$x
${p;x}