A netbsd-7 kernel build from today's sources with -Os errors out with
# compile P3B-F/drmfb_pci.o
/u/netbsd-builds/7/i386/tools/bin/i486--netbsdelf-gcc -msoft-float
-mno-mmx -mno-sse -mno-avx -ffreestanding -fno-zero-initialized-in-bss
-pipe -Os -march=pentium3 -fstack-protector
On Mon, 04 May 2015 16:18:42 +0200, Hauke Fath wrote:
A netbsd-7 kernel build from today's sources with -Os errors out with [...]
... and a few more.
Looks like '-Os' applies slightly different criteria than '-O2' to what
gcc perceives as an unused variable. The question is - should we care?
On Mon, May 04, 2015 at 05:30:17PM +0200, Hauke Fath wrote:
Looks like '-Os' applies slightly different criteria than '-O2' to what
gcc perceives as an unused variable.
Congratulation, you discovered one of the biggest bugs in GCC's unused
variable warning.
Joerg
