Use via Inline::C with compiler flags is broken

[johannessen]

An Alien that sets cflags to something like -Ifoo -Dbar breaks when used via use Inline with.

The reason is that Alien::Base’s Inline() method puts all these flags into INC, while Inline::C quotes spaces in INC when flags other than -I appear inside it. The INC value that Inline::C passes on to EU:MM becomes "-Ifoo -Dbar". Consequently the compiler doesn’t look for a directory named foo, it looks for a directory named foo -Dbar instead.

A somewhat hacky workaround might be to include at least one double quote in cflags, which would currently prevent Inline::C from adding further quotes in its quote_spaces() function.

But I think the proper solution for Alien::Base would rather be to revert #109, putting the -D and other flags into CCFLAGSEX instead.

[johannessen]

By the way, looking at the relevant code in the Inline() method:

Alien-Build/lib/Alien/Base.pm

Lines 922 to 928 in 832cf9b

	my $config = {
	# INC should arguably be for -I flags only, but
	# this improves compat with ExtUtils::Depends.
	# see gh#107, gh#108
	INC => $class->cflags,
	LIBS => $class->libs,
	};

Why are cflags() and libs() being used here, and not cflags_static() and libs_static()?

Reading the git history, I see this was written way back before the *_static variants were introduced. Is this just an oversight, or is there a particular reason behind it?

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… never mind this question. I was looking at a share-install-only Alien and got confused. Sorry.