pkg-config --cflags behaves different than freedesktops pkg-config
I am not sure if this is a bug really, but I am reporting it here for the record as it has influence on how some packages are built.
With freedesktop's pkg-config there is a single space returned:
$ echo "flags='$(pkg-config --cflags lua)'"
With pkgconf that space is missing.
rrdtool has a pretty stupid configure script:
if test "$LUA_CFLAGS" = ""; then ...
which will result in a different result than freedesktop's pkg-config.
I am not sure how close you want follow freedesktops pkg-config.
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