[Bug c/66457] New: gcc generates an extra "mov ??, %edx" before "call mcount" when "-pg" is enabled in cross compilation

[leedypku at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66457

            Bug ID: 66457
           Summary: gcc generates an extra "mov ??, %edx" before "call
                    mcount" when "-pg" is enabled in cross compilation
           Product: gcc
           Version: 4.9.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: leedypku at gmail dot com
  Target Milestone: ---

# On Darwin, with cross compilation, some code omitted
$ echo 'int main(){}' | i386-jos-elf-gcc -pg -m32 -S -x c -o - -
main:
        pushl   %ebp
        movl    %esp, %ebp
.LP0:
        movl    $.LP0,%edx  # this line
        call    _mcount
        popl    %ebp
        ret
        .ident  "GCC: (GNU) 4.9.2"

# On Linux, some code omitted
$ echo 'int main(){}' | gcc -pg -S -m32 -x c -o - -
main:
        pushl   %ebp
        movl    %esp, %ebp
        call    mcount
        popl    %ebp
        ret
        .ident  "GCC: (Ubuntu 4.8.2-19ubuntu1) 4.8.2"


1. It happens only in cross compilation.
2. The target is i386-jos-elf and the host is Darwin.
3. I've tested with GCC version 4.6.1, 4.6.4 and 4.9.2.
4. How can I disable it?