Commit r255468 broke compilation on Arm when in-line assembly is used to switch architectures:
asm(" .arch armv5te\n");
__asm__ __volatile__ (
"mcrr p0, 0, %2, %3, c0\n"
: "=r" (lo), "=r" (hi)
: "r" (0), "r" (0x100));
used to work and now doesn't. This breaks the Linux kernel compilation.
Using the new approach instead of in-line assembly
#pragma GCC target("arch=armv5te")
results in a cpp warning being emitted when the architecture is changed.
validating patch to submit upstream.
This is programmer error. Why should the compiler have to understand it being lied to?