mirror of
https://github.com/torvalds/linux.git
synced 2024-12-29 14:21:47 +00:00
a9468f30b5
Some versions of ARM GCC which do support asm goto, do not support the %c specifier. Since we need the %c to support jump labels on ARM, detect that too in the asm goto detection script to avoid build errors with these versions. http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48637 Acked-by: Jason Baron <jbaron@redhat.com> Signed-off-by: Rabin Vincent <rabin@rab.in> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
22 lines
465 B
Bash
22 lines
465 B
Bash
#!/bin/sh
|
|
# Test for gcc 'asm goto' support
|
|
# Copyright (C) 2010, Jason Baron <jbaron@redhat.com>
|
|
|
|
cat << "END" | $@ -x c - -c -o /dev/null >/dev/null 2>&1 && echo "y"
|
|
int main(void)
|
|
{
|
|
#ifdef __arm__
|
|
/*
|
|
* Not related to asm goto, but used by jump label
|
|
* and broken on some ARM GCC versions (see GCC Bug 48637).
|
|
*/
|
|
static struct { int dummy; int state; } tp;
|
|
asm (".long %c0" :: "i" (&tp.state));
|
|
#endif
|
|
|
|
entry:
|
|
asm goto ("" :::: entry);
|
|
return 0;
|
|
}
|
|
END
|