Makefile.am is GNU Make specific

The shell command

$(SED) -e 's,[@]PYTHON[@],$(PYTHON),' < $< > $@

expands to

    /usr/bin/sed -e 's,[@]PYTHON[@],/usr/local/bin/python,' <  > tester.py

when using BSD make.

The simple solution would be to name the single source in the shell command, like so

tester_py_SOURCES = src/test/tester.py.in tester.py: $(tester_py_SOURCES) Makefile (SED) -e 's,[@]PYTHON[@],(PYTHON),' < $(tester_py_SOURCES) > $@ chmod +x $@

This isn't very nice though since it'll break when more files are added to tester_py_SOURCES.

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