On 09/20/2012 02:26 AM, Whitequill Riclo wrote:
On Wed, Sep 19, 2012 at 9:11 PM, Bruce Dubbs <[email protected] <mailto:[email protected]>> wrote:Whitequill Riclo wrote: > On Wed, Sep 19, 2012 at 9:35 AM, Feuerbacher, Alan < > [email protected] <mailto:[email protected]>> wrote: > >> William Harrington wrote: >> >>> Sometimes you can't build mpfr mpc and gmp within the gcc source tree >>> for some targets. We found that out in CLFS. That's we we don't build >>> gmp mpc and mpfr within the tree. Works okay for x86 and x86_64, >>> however, when you start building for other targets, it becomes hairy. >>> You may want to try to build gmp mpfr and mpc separately. >> >> I've been mostly quietly keeping up with this question on several lists: >> is it better to build those programs in the source tree or separately? >> There's a discussion somewhere (on a gcc list?) that comes down strongly on >> the side of building them in the source tree. It even asks why anyone would >> want to do it differently. Yet the programs contain instructions for >> tuning, which requires them to be built separately. >> >> During the 1 1/2 years I've been playing around with compiling gcc and all >> of the LFS programs, I've experimented with building separately many times. >> No problem building them, but gcc usually fails to find at least one of >> them. >> >> Now, I'm a real newbie when it comes to all this, but if anyone knows why >> gcc can't seem to find the programs, I'd sure like to know. I'm trying to >> understand all the ins and outs of everything covered by LFS and a lot more >> besides. >> >> Alan >> > I've already succeeded at building gmp, and mpc with in the gcc build > directory, I need to make mpfr, what do you suggest I do? > > Is there a way to just build the following code block; Needs #include <mpfr.h> > 1. | int > 2. | main () > 3. | { > 4. | mpfr_t x; mpfr_init(x) ; mpfr_clear(x); > 5. | > 6. | ; > 7. | return 0; > 8. | } > > and then re-run make? After lfs is completed, there are the files /usr/lib/libmpfr.{a,so). How about: gcc -o xyz xyz.c -lmpfr Works for me. $ ldd xyz linux-gate.so.1 (0xffffe000) libmpfr.so.4 => /usr/lib/libmpfr.so.4 (0xb7735000) libc.so.6 => /lib/libc.so.6 (0xb7584000) libgmp.so.10 => /usr/lib/libgmp.so.10 (0xb751f000) /lib/ld-linux.so.2 (0xb77a7000) -- Bruce I think I know what I'm doing wrong finally, all the command flags I'm using to find mpfr are to find the mpfr library/header file, rather then find the source to build the library.What is the appropriate flag to tell gcc the source path rather then the library path?-- http://linuxfromscratch.org/mailman/listinfo/lfs-support FAQ: http://www.linuxfromscratch.org/lfs/faq.html Unsubscribe: See the above information page
export LDFLAGS='-L/some/path'
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