diff options
| author | Andrew Morton <akpm@osdl.org> | 2007-05-22 23:50:21 +0200 |
|---|---|---|
| committer | Adrian Bunk <bunk@stusta.de> | 2007-05-22 23:50:21 +0200 |
| commit | 4eedb20374aadf2e4c8781a47a349b8897a43074 (patch) | |
| tree | a9728c77c2812a62fd6ad10b51d1a3a28cd7bcc7 | |
| parent | fae1f6d365ea6ca7b736291970a1aaf56f8e3ed7 (diff) | |
gcc-4.1.0 is bust
Keith says
Compiling 2.6.19-rc6 with gcc version 4.1.0 (SUSE Linux), wait_hpet_tick is
optimized away to a never ending loop and the kernel hangs on boot in timer
setup.
0000001a <wait_hpet_tick>:
1a: 55 push %ebp
1b: 89 e5 mov %esp,%ebp
1d: eb fe jmp 1d <wait_hpet_tick+0x3>
This is not a problem with gcc 3.3.5. Adding barrier() calls to
wait_hpet_tick does not help, making the variables volatile does.
And the consensus is that gcc-4.1.0 is busted.
Adrian Bunk:
Changed from a #warning to an #error for 2.6.16.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
| -rw-r--r-- | init/main.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/init/main.c b/init/main.c index 5edd3013d810..847397be23a6 100644 --- a/init/main.c +++ b/init/main.c @@ -71,6 +71,10 @@ #error Sorry, your GCC is too old. It builds incorrect kernels. #endif +#if __GNUC__ == 4 && __GNUC_MINOR__ == 1 && __GNUC_PATCHLEVEL__ == 0 +#error gcc-4.1.0 is known to miscompile the kernel. A different compiler version is recommended. +#endif + static int init(void *); extern void init_IRQ(void); |