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Rename symbol at link time
- From: DamienDaG <deusnei-div at yahoo dot fr>
- To: gcc-help at gcc dot gnu dot org
- Date: Wed, 6 Jun 2012 00:27:39 -0700 (PDT)
- Subject: Rename symbol at link time
Hi
I'm trying to build a very simple project composed of one source file and a
linker script :
file f1.c :
#include <stdio.h>
extern void fct1_wrongname();
void fct9()
{
printf("I'm fct9\n");
}
int main( int argc, char** argv)
{
fct1_wrongname();
return 0;
}
end of file f1.c
This file is compiled with command :
gcc -O0 -xc -g -Wall -c f1.c -of1.o
then build with :
ld -T'Link.cmd' -O0 -Map out.map -o rename.exe f1.o
file Link.cmd contains :
fct1_wrongname = fct9 ;
end of file Link.cmd
Function fct1_wrongname doesn't exist, and I want to replace the call of
this function by a call of fct9.
I always get this error message :
Link.cmd:4: undefined symbol `fct9' referenced in expression
I need to use a linker script (here Link.cmd) to apply this to a larger
project, and I can't use symbol definition (i.e. -D"fct1_wrongname=fct9")
because there are to many symbols.
I've been looking for a solution for a long time, but I couldn't find
anything.
Can anybody help me ?
Thanks in advance
Damien
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