On 6/25/06, Dimitris Lampridis <[EMAIL PROTECTED]> wrote:
Hi everybody,
Hi
I was wondering if anyone can inform me of the default compilation flags for AMD64 when compiling and installing debian source packages. I suppose there is such a thing (there should be an -march=k8 or -mtune by default, no? ), on top of which every package possibly adds its own?
when compiling pcre for example, the compiler is invoked as: x86_64-linux-gnu-gcc -c -Wall -g -O2 -I. -I. -DSUPPORT_UTF8 -DSUPPORT_UCP -DPOSIX_MALLOC_THRESHOLD=10 ./pcre_try_flipped.c -fPIC -DPIC -o .libs/pcre_try_flipped.o But since we are compiling on amd64, the default should be k8, I mean the default for gcc, right? Have a look at the head of the asm output from: x86_64-linux-gnu-gcc -Wall -g -O2 -I. -I. -DSUPPORT_UTF8 -DSUPPORT_UCP -DPOSIX_MALLOC_THRESHOLD=10 -S ./pcre_version.c -fverbose-asm # options passed: -I. -I. -DSUPPORT_UTF8 -DSUPPORT_UCP # -DPOSIX_MALLOC_THRESHOLD=10 -mtune=k8 -auxbase -g -O2 -Wall -fverbose-asm Also further down the line, there is a -m64.
IIRC I compiled once a program with -march=k8, and without it, and they were identical. I wonder what the default -march is. However since we are generating 64-bit code, it can't be anything lower than a k8, right? If I am wrong, please somebody tell me :)
PS: My gentoo alter-ego has taken control over me, shoot me before its too late :)
Take a look at sf.net/projects/debtoo Cheers, Edwin -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
