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Re: [libvirt] PATCH: configure.in should use 'ld' from $PATH for checking version-script syntax, not hardcode /usr/bin/ld



On Mon, Nov 16, 2009 at 05:15:04PM +0100, Paolo Bonzini wrote:
> On 11/16/2009 03:01 PM, Daniel Veillard wrote:
>>    The only thing I could gather is using -Wl,-debug option of gcc on a
>> compile + link simple test and then parse stderr to find 'ld '
>> But that's still completely gcc specific, so ACK for current patch,
>
> The right one is to use "`gcc --print-prog-name=ld`".

  That gives the program name but not the path used:

paphio:~/libvirt -> gcc -Wl,-debug -o tst ../tst.c 2> res
paphio:~/libvirt -> grep "ld " res
/usr/bin/ld --eh-frame-hdr --build-id -m elf_x86_64 --hash-style=gnu
-dynamic-linker /lib64/ld-linux-x86-64.so.2 -o tst
[...]
/usr/lib/gcc/x86_64-redhat-linux/4.4.1/../../../../lib64/crtn.o
paphio:~/libvirt -> gcc --print-prog-name=ld
ld
paphio:~/libvirt ->

  so that won't differentiate ld in $PATH from /usr/bin/ld which
is the actual command launched by gcc (or rather collect2) ... so
unfortunately that's still gcc only and even then incomplete :-)

Daniel

-- 
Daniel Veillard      | libxml Gnome XML XSLT toolkit  http://xmlsoft.org/
daniel veillard com  | Rpmfind RPM search engine http://rpmfind.net/
http://veillard.com/ | virtualization library  http://libvirt.org/


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