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How can I keep CXXFLAGS in sync in all the directories in a shallow paca
How can I keep CXXFLAGS in sync in all the directories in a shallow pacakge?
14 Oct 2001 13:14:11 -0700
Gnus/5.09 (Gnus v5.9.0) Emacs/21.0.106
I like to pass certain flags, such as `-Wall', to the C++ compiler in
all the directories of my package. Originally I had `CXXFLAGS=-Wall'
in each of the Makefile.ams, but that duplication seemed wrong, and I
sought a cleaner way to do it. I haven't yet found one.
Here's how I'm now doing it, which is also unsatisfying:
I'm not setting CXXFLAGS at all, and instead have the top-level
Makefile.am look like this:
This seems to work, but the automake manual says
Using [GNU make] extensions in a `Makefile.am' will lead to
errors or confusing behavior.
... and I *think* that `export' is a GNU make extension. So I'm still
looking for a better solution. (Right now I'm using an autoconf hack
to require GNU make, but that's ugly.)
Even if it turns out to be safe to use `export', I'm still wondering
if this is the best way to keep CXXFLAGS the same in all directories.
Please respond directly to me, as I don't read this list.
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