Hi
I have not built master for a while, and now find GNU specific extensions
that are not portable. Since it is not the first time I address them,
I would like to send a reminder about it:
1) bash-specific syntax
Do not write:
test $foo == "bar"
But instead write:
test $foo = "bar"
The = operator is POSIX compliant. The == operator works in bash end ksh.
2) GNU sed specific flag
Do not write:
sed -i 's/foo/bar/' buz
But instead write:
sed 's/foo/bar/' buz > buz.new && mv buz.new buz
The -i flags is a GNU extension that is not implemented in BSD sed.
3) GNU make specific syntax
Do not write:
foo.c: foo.x foo.h
${RPCGEN} $<
But instead write:
foo.c: foo.x foo.h
${RPCGEN} foo.x
Or even:
foo.c: foo.x foo.h
${RPCGEN} ${@:.c=.c}
$< does not work everywhere in non GNU make. If I understand
autoconf doc correctly, it does not work outside of generic rules (.c.o:)
--
Emmanuel Dreyfus
m...@netbsd.org
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