http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49258
licheng.1...@gmail.com <licheng.1212 at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |blocker
--- Comment #2 from licheng.1212 at gmail dot com <licheng.1212 at gmail dot
com> 2012-04-07 07:53:34 UTC ---
[licheng@rda ~]$ cat hello.java
class hello{
public void notused()
{
System.out.println("not used");
}
public static void main(String argv[])
{
System.out.println("Hello");
}
}
[licheng@rda ~]$ gcj --main=hello hello.java -o hello -ffunction-sections
-Wl,--gc-sections,--print-gc-sections
/usr/bin/ld: Removing unused section '.rodata' in file
'/usr/lib/gcc/i686-redhat-linux/4.6.3/../../../crt1.o'
/usr/bin/ld: Removing unused section '.rodata' in file
'/usr/lib/gcc/i686-redhat-linux/4.6.3/crtbegin.o'
[licheng@rda ~]$ ./hello
Hello
[licheng@rda ~]$ objdump -d hello > hello.asm
[licheng@rda ~]$ cat hello.asm | grep notused -C 5
8048866: e8 a5 fe ff ff call 8048710
<_ZN4java4lang6ObjectC1Ev@plt>
804886b: c9 leave
804886c: c3 ret
804886d: 90 nop
0804886e <_ZN5hello7notusedEJvv>:
804886e: 55 push %ebp
804886f: 89 e5 mov %esp,%ebp
8048871: 53 push %ebx
8048872: 83 ec 24 sub $0x24,%esp
8048875: bb 00 00 00 00 mov $0x0,%ebx
804887a: 84 db test %bl,%bl
804887c: 75 0c jne 804888a
<_ZN5hello7notusedEJvv+0x1c>
804887e: c7 04 24 c0 9e 04 08 movl $0x8049ec0,(%esp)
8048885: e8 46 fe ff ff call 80486d0 <_Jv_InitClass@plt>
804888a: a1 a0 9e 04 08 mov 0x8049ea0,%eax
804888f: 89 45 f4 mov %eax,-0xc(%ebp)
8048892: 8b 45 f4 mov -0xc(%ebp),%eax
[licheng@rda ~]$
my gcj version is gcj (GCC) 4.6.3 20120306 (Red Hat 4.6.3-2)
