Very Computer

Thanks in advance,
Damien

I'm not sure if this is easily achievable, since compilation is only one
step when building a binary. Linking is another issue. Linuces are usually
based on glibc, *BSDs not.

DB> 2) installing linux gcc (with linux emulation) under FreeBSD

Does this make any difference from using a "native" compiler? This does
not solve the linking problem. And unless you build statically linked
binaries, you still have trouble with supporting various distro's based on
different glibc versions. It's probably not worth the hassle...

Shipping the source has a long tradition in the *nix world. :-) If you
cannot ship the source for any reasons, it is probably better to have a
Linux development environment built up with the distro you'd like to
support.

BTW: Is ELF the same on BSD and Linux?

Cheers,
Tom
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Quote:> I want to build linux binaries from sources with gcc under FreeBSD.
> AFAIK, there are two solutions to solve this problem:
> 1) doing some kind of cross compilation with native gcc under FreeBSD
> 2) installing linux gcc (with linux emulation) under FreeBSD
> Does anyone here experienced one or both of these solutions ?

--
Steve
http://troutmask.apl.washington.edu/~kargl/

(I myself would like to know more about this subject, so if anybody has more
insight, please follow up on this).

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Do not meddle in the affairs of sysadmins, for they can make your life
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DB> I want to build linux binaries from sources with gcc under FreeBSD.
DB> AFAIK, there are two solutions to solve this problem:
DB> 1) doing some kind of cross compilation with native gcc under FreeBSD
DB> 2) installing linux gcc (with linux emulation) under FreeBSD
DB> Does anyone here experienced one or both of these solutions ?

        Look into /usr/ports/devel/linux-devtools(-7).

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Quote:> and it was not originaly designed to support more then one "subsystem" or
> ABI on a single OS.

Quote:> There is some special magic involved in recognizing which type (FreeBSD or
> Linux) the executable is.

Quote:> IMO if you must build Linux executables under FreeBSD, you sould use the
> whole Linux toolchain (compiler, linker & libraries) running under Linux
> emulation.

Quote:> Even so, you will probably have to fiddle with separating the FreeBSD
> environment (includes, libraries) from the Linux one while building.

Quote:> (I myself would like to know more about this subject, so if anybody has
> more insight, please follow up on this).

  Gunther

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Quote:>>> BTW: Is ELF the same on BSD and Linux?
>AFAIK, in there lies most of the problems involved: ELF is exactly the same
>for Linux and FreeBSD binaries, and it was not originaly designed to support
>more then one "subsystem" or ABI on a single OS. There is some special magic
>involved in recognizing which type (FreeBSD or Linux) the executable is. So,
>it would be very confusing for compiler & linker to understand the subtle
>differences. I am not an expert, but IMO if you must build Linux executables
>under FreeBSD, you sould use the whole Linux toolchain (compiler, linker &
>libraries) running under Linux emulation. Even so, you will probably have to
>fiddle with separating the FreeBSD environment (includes, libraries) from
>the Linux one while building.

http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/linuxemu.html

on how it was configured.

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./configure --build=i386-freebsd --host=i386-freebsd
--target=i386-linux --prefix=/usr/local/cross-tools --languages=c,c++

for each of binutils, gcc, gdb (and newlib if you want to avoid
license issues).

"build" is place you are making the cross-compiler, "host"
is where to cross-compiler will live, and "target" is what
type of stuff the cross-compiler will spit out.

I made a freebsd-to-arm cross-compiler this way.

http://www.objsw.com/CrossGCC

Also, just look around google with "gcc+cross+compiler+build" etc.

Matt