[Bug target/46770] Replace .ctors/.dtors with .init_array/.fini_array on targets supporting them

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46770

--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> 2010-12-09 17:55:41 UTC ---
Another test:

[hjl@gnu-6 pr46770]$ cat foo.c
#include <stdio.h>

int
main ()
{
  printf ("main\n");
  return 0;
}
[hjl@gnu-6 pr46770]$ cat foo1.c
#include <stdio.h>
static void
init ()
{
  printf ("init_array\n");
}
static void (*const init_array []) ()
  __attribute__ ((used, section (".init_array"), aligned (sizeof (void *))))
  = { init };
static void
fini ()
{
  printf ("fini_array\n");
}
static void (*const fini_array []) ()
  __attribute__ ((used, section (".fini_array"), aligned (sizeof (void *))))
  = { fini };
[hjl@gnu-6 pr46770]$ cat foo2.c
#include <stdio.h>
static void
ctor ()
{
  printf ("ctor\n");
}
static void (*const ctors []) ()
  __attribute__ ((used, section (".ctors"), aligned (sizeof (void *))))
  = { ctor };
static void
dtor ()
{
  printf ("dtor\n");
}
static void (*const dtors []) ()
  __attribute__ ((used, section (".dtors"), aligned (sizeof (void *))))
  = { dtor };
[hjl@gnu-6 pr46770]$ make
gcc -O -fPIC   -c -o foo.o foo.c
gcc -O -fPIC   -c -o foo1.o foo1.c
gcc -O -fPIC   -c -o foo2.o foo2.c
gcc -shared -o libfoo2.so foo2.o 
gcc -o foo1 foo.o foo1.o libfoo2.so -Wl,-R,.
gcc -shared -o libfoo1.so foo1.o 
gcc -o foo2 foo.o libfoo1.so foo2.o -Wl,-R,.
gcc -o foo3 foo.o foo1.o foo2.o
./foo1
ctor
init_array
main
fini_array
dtor
./foo2
init_array
ctor
main
dtor
fini_array
./foo3
ctor
init_array
main
fini_array
dtor
[hjl@gnu-6 pr46770]$