Date: Mon, 16 Feb 2004 16:18:36 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: "Juan Tumani" <jtumani55@hotmail.com>, des@des.no, freebsd-hackers@freebsd.org Subject: Re: FreeBSD 5.2 v/s FreeBSD 4.9 MFLOPS performance (gcc3.3.3v/sgcc2.9.5) Message-ID: <200402170018.i1H0IaWd088314@apollo.backplane.com> References: <BAY12-F541stYkcOj3i00018525@hotmail.com> <200402162358.i1GNwkkm088106@apollo.backplane.com>
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One last note... if you guys are trying to compile flops.c with the
GCC2.95 port it is probably being linked against FreeBSD-5's lib/csu's
crt1.o, which does not have the stack alignment.
Original 4.9-compiled binaries will have been linked against 4.9's
crt1.o, which DOES have the stack alignment.
Modifying kern_exec.c is not the right solution, I don't think.
Adding some basic alignment back into crt1.o (like 4.9 has) would be
a reasonable solution.
In DragonFly I kept 4.9's alignment code in lib/csu's crt1.c, and I
will be keeping it in there even when we wholely switch to gcc3 at
some future date. It doesn't hurt anything and I don't like 'assuming'
that GCC will always be used for C compiling.
-Matt
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