Need to specify a file in a GNUmakefile that starts with ~?
Like on macOS Catalina where you can't have directories outside your
home directory any more, so need to refer to the directory you
manually installed some software to? You can't just include the raw
~/where/ever in that PATH in the GNUmakefile because the
~ prefix won't be translated into the user's home directory.
That substitution is done by the shell when a command is executed, but
the shells expect that tilde to have been expanded in the command that
sets the path. It doesn't do “Tilde Expansion” on each part of the
PATH when it goes looking things up in the path. So, you have to get
that expansion done manually if you set it in a GNUmakefile.
Anyway, This ugly hack works:
export PATH := $(shell eval dir='~/sw/versions/heirloom-doctools/git/ucb';\ echo $$dir):$(PATH) export TROFFFONTS := $(shell eval dir='~/Library/Fonts';\ echo $$dir):/Library/Fonts all: @echo PATH=${PATH} @echo @echo TROFFFONTS=${TROFFFONTS} @echo @echo -n '"type troff" returns ' @type troff
Put this in a file somewhere and invoke GNU make on it and it prints:
PATH=/Users/tkb/sw/versions/heirloom-doctools/git/ucb:/Users/tkb/local/rndbin:/Users/tkb/.cargo/bin:/Users/tkb/.nimble/bin:/usr/local/opt/libxslt/bin:/usr/local/opt/libxml2/bin:/Users/tkb/sw/versions/mew/git/bin:/Users/tkb/sw/versions/groff-git/bin:/Users/tkb/sw/versions/chibi-scheme/git/bin:/usr/local/opt/tcl-tk/bin:/usr/local/opt/expat/bin:/Users/tkb/.opam/default/bin:/usr/local/opt/texinfo/bin:/usr/local/opt/gnu-sed/libexec/gnubin:/usr/local/opt/findutils/libexec/gnubin:/usr/local/opt/curl/bin:/usr/local/opt/coreutils/libexec/gnubin:/Users/tkb/.local/bin:/Users/tkb/context-osx-64/tex/texmf-osx-64/bin:/Applications/Emacs.app/Contents/MacOS/bin:/Users/tkb/local/unix/bin:/Users/tkb/local/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/TeX/texbin:/opt/X11/bin:/Users/tkb/local/unix/rndbin:/Applications/Racket v7.5/bin:/Users/tkb/go/bin:/Applications/Emacs.app/Contents/MacOS/bin-x86_64-10_14:/Applications/Emacs.app/Contents/MacOS/libexec-x86_64-10_14 TROFFFONTS=/Users/tkb/Library/Fonts:/Library/Fonts "type troff" returns troff is /Users/tkb/sw/versions/heirloom-doctools/git/ucb/troff
(Yes, my path may be a little excessive.)
Unfortunately I haven't figured out how to do this with the BSD makes.
Last edited: 2020-08-03 16:03:19 EDT
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