https://sourceware.org/bugzilla/show_bug.cgi?id=30138
Bug ID: 30138
Summary: localize symbol is broken when using x64 version of
mingw
Product: binutils
Version: 2.41 (HEAD)
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: alexeysamson at yandex dot ru
Target Milestone: ---
I compile and linking my programm with mingw x64.
gcc version 12.2.0 (x86_64-win32-seh-rev2, Built by MinGW-W64 project)
I have two files:
foo_var.c:
int global_var = 1;
foo_print.c:
#include <stdio.h>
extern int global_var;
void print_foo(void)
{
printf("print_foo = %d\n", global_var);
}
that compile and link into foo.o and localize global_var:
gcc -c foo.c foo_print.c
ld -r -o foo.o foo_print.o foo_var.o
objcopy -L global_var foo.o
And two files
bar_var.c:
int global_var = 2;
bar_print.c:
#include <stdio.h>
extern int global_var;
void print_bar(void)
{
printf("print_bar = %d\n", global_var);
}
compile and link into bar.o and localize global_var too:
gcc -c bar.c bar_print.c
ld -r -o bar.o bar_print.o bar_var.o
objcopy -L global_var bar.o
also I have main, where I call print_foo and print_bar
main.c:
void print_foo(void);
void print_bar(void);
int main(int argc, char const *argv[])
{
print_foo();
print_bar();
return 0;
}
When I compile and link all together:
gcc -c main.c
gcc main.o foo.o bar.o
and run a.exe
I get this
print_foo = 1
print_bar = 1
instead of this
print_foo = 1
print_bar = 2
Seems like localize symbol is broken somehow when using x64 version of mingw.
In x32 this example works fine, but i cant fit my programm in 2 gb ram.
I managed to do this example on linux too, and its work fine even with x64.
Mb its caused dy this fix
https://gcc.gnu.org/legacy-ml/gcc-patches/2013-03/msg00858.html.
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