[Octave-bug-tracker] [bug #60413] build: sed expression problems when prefix is empty or slash

[Markus Mützel]

Follow-up Comment #8, bug #60413 (project octave):

The sed command in comment #7 wouldn't correctly match the prefix in
OCT_LINK_OPTS which looks like the following on Windows with Octave 6.2:

>> mkoctfile -p OCT_LINK_OPTS
-Wl,-rpath-link,C:\PROGRA~1\GNUOCT~1\OCTAVE~2.0\mingw64\/lib
-LC:\PROGRA~1\GNUOCT~1\OCTAVE~2.0\mingw64\/lib
-LC:\PROGRA~1\GNUOCT~1\OCTAVE~2.0\mingw64\/qt5/lib -Wl,--export-all-symbols


Maybe something like this instead?

if test -n "@prefix@"; then echo '@OCT_LINK_OPTS@' | sed -E "s%(-L|-I|
|,)@prefix@([/\\ ]|$)%\1\$\{prefix\}\2%g"; else echo '@OCT_LINK_OPTS@'; fi


Still not sure about "sed -E" or "sed -r". Neither seems to be documented for
POSIX sed:
https://www.unix.com/man-page/posix/1p/sed/


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