Date: Thu, 6 Feb 2014 14:04:10 -0500 From: Rich Felker <dalias@...ifal.cx> To: musl@...ts.openwall.com Subject: Re: Out-of-tree builds On Thu, Feb 06, 2014 at 06:39:32PM +0100, Szabolcs Nagy wrote: > * Oliver Schneider <musl-mailinglist@...rot.com> [2014-02-06 17:15:21 +0000]: > > however, then I switch to an empty directory and run this: > > > > ../musl/configure --disable-shared > > > > I get: > > > > using compiler runtime libraries: -lgcc -lgcc_eh > > checking whether compiler's long double definition matches float.h... no > > ../musl/configure: error: unsupported long double type > > > > Are out-of-tree builds generally not supported, or am I doing something > > wrong? > > not supported (yet) > > it probably wouldn't be hard to add though > > (eg the paths in the makefile can be prefixed with the build path > and the generated config.mak can set that prefix up, but i'm not > sure what's the best way to detect the path and there might be > issues around the generated alltypes.h and include/bits) It's not as easy as it sounds because of the way implicit % rules work. I don't know how to get them to work when adding a leading path. If someone can figure out how to do this without doing anything horribly ugly/bloated/slow in the makefile, I'm open to adding support for out-of-tree builds this way. Rich
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