Appending to variables

Heime <[email protected]> Mon, 22 Jun 2026 20:04:07 +0000

Newsgroups	gmane.comp.gnu.make.general
Message-ID	<fqNMPo6RuebtALq_ERBIQ3hoEYrB5ZMxat9ih7zg8Uwg42HT6hCyN3uCMPbmFS0lLxY7iHZIWKCbLLyrq0IDbe1Wu7PhpuB7ly5XE_qmTo0=@protonmail.com>

How can I have targets that append values to variables?
Doing as follows produces error on hopc. =20

.PHONY: trlfn ndf

trlfn: hopc +=3D --transliterate-file-names
ndf: hopc +=3D --node-files

What I want is that calling=20

make -f myfile.mk trlfn

will append --transliterate-file-names to hopc