what is the difference between the two command?
Ian Lance Taylor
iant at google.com
Sun Jan 20 12:07:15 EST 2013
On Sat, Jan 19, 2013 at 1:30 PM, horseriver <horserivers at gmail.com> wrote:
> On Sat, Jan 19, 2013 at 09:47:53PM -0800, Ian Lance Taylor wrote:
>> On Fri, Jan 18, 2013 at 10:19 PM, horseriver <horserivers at gmail.com> wrote:
>> > hi:
>> > Here are two command for producting one .so file :
>> > 1. gcc -nostdlib -Wl,-T,vsyscall.lds vsyscall-int80.o -o vsyscall-int80.so
>> > 2. ld -T vsyscall.lds vsyscall-int80.o -o vsyscall-int80.so
>> There is no substantive difference between these commands. There are
>> various minor differences that probably don't matter. Use the -v
>> option when invoking gcc to see precisely how it invokes the linker.
>> In particular, invoking the linker via the gcc driver will cause some
>> C++-specific operations to occur when needed, but since you aren't
>> using C++ in this case they won't happen.
> I have a weird problem here!
> When I type the 1 to make vsyscall-int80.so ,ld report error: Not enough room for program headers, try linking with -N
> But,When I type 2 to make vsyscall-int80.so,it works successfully.
> What is the reason?
I don't know. Run the complete gcc command with the -v option and you
will see precisely how it invokes the linker.
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