refactor(make): Use awk to extract target names #1069
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scop
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Solaris awk lacks many POSIX features as listed below. When any of them is used, we use XPG4 awk at /usr/xpg4/bin/awk instead of Solaris awk at /usr/bin/awk. - Solaris awk does not support ENVIRON. - Solaris awk does not support the function `tolower`. - Solaris awk does not support user-defined functions. - Solaris awk does not support `-F ERE' but only supports -F<char>. - Solaris awk does not accept an option argument for `-F` in a separate word. The option argument needs to be specified in the same command-line word as `-F<char>`. - Solaris awk does not support the command-line option `-v var=value` Co-authored-by: Ville Skyttä <ville.skytta@iki.fi>
The condition `$NF=2` in the awk script actually assigns a value `2` to the last field instead of comparing it to `2` and always evaluates to true. I suspect it to be `NF >= 2`. This could possibly be intended as `NF == 2` or `$NF == 2`, but neither seems to work correctly. The input contains the names of man entries of the form ` perlxx <description>`, but the description is usually given by more than one words, so restricting them by `NF == 2` would be unreasonable. On the other hand, there are no entries ending with the word `2` so `$NF == 2` would produce no results. This condition was introduced from the beginning when the related code was introduced in commit 4254f3a. There does not seem to be any hints on the background of `$NF=2`.
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This is the last piece of
#TODO:API.This is also the refactoring mentioned in #546 (comment). As mentioned there, we might separate the awk script to another file in
helpers/.