[Bug c/39456] Functions of a file in different named sections

[etienne_lorrain at yahoo dot fr]

------- Comment #1 from etienne_lorrain at yahoo dot fr  2009-03-19 16:33 -------
 Also, you cannot put function in another section and then
 use -ffunction-sections, i.e.:

etienne@gujin:~$ gcc --version
gcc (Debian 4.3.3-3) 4.3.3
Copyright (C) 2008 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

etienne@gujin:~$ cat tmp.c
__attribute__((section(".extracode"))) int fct1 (void) {
        return 1;
}
__attribute__((section(".extracode"))) int fct2 (void) {
        return 2;
}

etienne@gujin:~$ gcc -Os -fomit-frame-pointer -ffunction-sections -S tmp.c -o
tmp.s
etienne@gujin:~$ cat tmp.s
        .file   "tmp.c"
        .section        .extracode,"ax",@progbits
.globl fct1
        .type   fct1, @function
fct1:
        movl    $1, %eax
        ret
        .size   fct1, .-fct1
.globl fct2
        .type   fct2, @function
fct2:
        movl    $2, %eax
        ret
        .size   fct2, .-fct2
        .ident  "GCC: (Debian 4.3.3-3) 4.3.3"
        .section        .note.GNU-stack,"",@progbits
etienne@gujin:~$

 So you cannot use garbage collection in the linker...


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39456