* Michael Biebl <biebl@debian.org>, 2010-12-19, 23:18:
When you say that setting the custom LDFLAGS doesn't work, have you actually exported them? :) If you just do LDFLAGS=... or LDFLAGS != ... or LDFLAGS := ..., make(1) will only use the new value *within the Makefile itself*, it won't be passed to child processes such as the configure script.This is all true, but I don't think this is the culprit here. dpkg-buildpackage puts LDFLAGS into environment, so it would be exported even if you didn't use the "export" keyword.Erm, yes, but dpkg-buildpackage doesn't see the LDFLAGS modified in the rules file either, does it? If you put into the rules file a line saying "LDFLAGS=-Wl,--as-needed" without the export keyword, it would still not work - that was the point of my explanation, just as you say below :)Nah, it would work just fine: $ printf 'LDFLAGS=foo\nall:\n\t@echo LDFLAGS=\\"$$LDFLAGS\\"' > MakefileYou missed the point here: the env vars are *not* passed to sub shells. As configure is a shell script your example will not work. Try substituting echo with a shell script and run the echo from within the shell script, if you want.
This echo *is* a subshell. You'll get the very same results when you substitute it with a shell script.
Here's the relevent piece of documentation: http://www.gnu.org/software/autoconf/manual/make/Variables_002fRecursion.html -- Jakub Wilk
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