FreeBSD can't run a SVR4 elf executable ?

[zero]

Hi,

I'm just asking why freebsd can't run a SVR4 elf executable ?
I tried to write "my own" header (with some tricks in assembler),
but when I exec my application, it return an error:

ELF binary type "0" not known.

So I must run brandelf before execute it.
Is'nt weird ? Normally, the type 0 is the System V ABI, It's a common
standard file format ? no ?

[zero]

Hmm ok, the System V 4 ABI support is'nt compiled by default, we need to add:

options COMPAT_SVR4

in the kernel configuration file.
It should be better to add this option by default as well we can easily code a portable executable.

[DutchDaemon]

But ~99,996591% of FreeBSD users don't need that option.

[MG]

Why not just kldload svr4? It's compiled with the GENERIC kernel.