check if kvm is available and warn if not
parent
34c0c2c86b
commit
fee4a94e39
@ -0,0 +1,39 @@
|
||||
# The Problem
|
||||
|
||||
gcc sometimes generates slightly different code with the same semantics.
|
||||
|
||||
## Optimizations
|
||||
|
||||
The following optimizer flags reduce non-determinism when compiling wxWidgets:
|
||||
|
||||
-fno-tree-loop-optimize
|
||||
-fno-trapping-math
|
||||
-fno-tree-reassoc
|
||||
|
||||
## Left Over
|
||||
|
||||
Even with the above flags, the compiler still generates this difference in one out of 100 builds of wxWidgets:
|
||||
|
||||
monolib_property.o: elf64-elf_x86_64
|
||||
|
||||
aef7: 00
|
||||
aef8: 45 31 f6 xor %r14d,%r14d
|
||||
aefb: 48 8d 84 24 50 06 00 00 lea 0x650(%rsp),%rax
|
||||
- af03: c6 44 24 67 00 movb $0x0,0x67(%rsp)
|
||||
- af08: 48 83 c2 10 add $0x10,%rdx
|
||||
- af0c: 48 83 c1 10 add $0x10,%rcx
|
||||
- af10: 48 81 7c 24 08 ff ff ff cmpq $0xffffff,0x8(%rsp)
|
||||
- af18: 00
|
||||
- af19: c6 44 24 47 00 movb $0x0,0x47(%rsp)
|
||||
- af1e: c7 44 24 24 00 00 00 00 movl $0x0,0x24(%rsp)
|
||||
+ af03: c7 44 24 24 00 00 00 00 movl $0x0,0x24(%rsp)
|
||||
+ af0b: 48 83 c2 10 add $0x10,%rdx
|
||||
+ af0f: 48 83 c1 10 add $0x10,%rcx
|
||||
+ af13: 48 81 7c 24 08 ff ff ff cmpq $0xffffff,0x8(%rsp)
|
||||
+ af1b: 00
|
||||
+ af1c: c6 44 24 47 00 movb $0x0,0x47(%rsp)
|
||||
+ af21: c6 44 24 67 00 movb $0x0,0x67(%rsp)
|
||||
af26: 4c 8d bc 24 28 03 00 00 lea 0x328(%rsp),%r15
|
||||
af2e: 48 89 44 24 10 mov %rax,0x10(%rsp)
|
||||
af33: 48 89 54 24 78 mov %rdx,0x78(%rsp)
|
||||
|
Loading…
Reference in New Issue