Linking to libc problem

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vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid 01 Mar 2007, 23:43

How the hell should i link to libc?

Hi, i have problem with linking to libc on linux. I make object file, link it this way:

Code:

ld -e main -lc file.o fasmlib.o -o file

but then when i try to run it:

Code:

./file

i get:

Code:

-bash: ./file: No such file or directory

I found out that this is some kind of problem with finding dynamic library. Using "readelf -l" i found out that "Requesting program interpreter: /usr/lib/libc.so.1". I don't have "lib/libc.so.1" on my system.

Same interpreter is set when i link directly to "lib/libc.so.6" instead of using "-lc".

Anyone knows solution?

01 Mar 2007, 23:43

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid 01 Mar 2007, 23:46

by the way, this is last thing i need to solve before releasing FASMLIB 0.5, so please help Wink

01 Mar 2007, 23:46

LocoDelAssembly
Your code has a bug

Joined: 06 May 2005
Posts: 4624
Location: Argentina

LocoDelAssembly 02 Mar 2007, 00:25

Follow http://board.flatassembler.net/topic.php?t=4964&postdays=0&postorder=asc&start=20 maybe it helps

02 Mar 2007, 00:25

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid 02 Mar 2007, 08:37

allright, it works. For someone who will hit this thread with searching:

needed switches for "ld":

Code:

-dynamic-linker lib/ld-linux.so.2   ;set program loader
-lc    ;link C runtime
-e entry ;entry point symbol
-o output ;output file name
file1.o
file2.o
...

thanks.

by the way i found last problem, it was not bug in FASMLIB, but in example file using it. I was comparing speed of FASMLIB and libc, and mixed up their memory managers, which both use brk() Smile

02 Mar 2007, 08:37

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