{bb} Fix: compiling BB on OpenBSD

["Russ Starr" <russ.starr@gmail.com>]

I found that someone else in the archives had the same problem as I did.

http://support.bb4.com/archive/200511/msg00023.html

cc1: error: trampoline code generation is not allowed without -ftrampolines

You need to add the -ftrampolines to the CFLAGS when compiling. I just
patched my src/minimake/genmake file like this:

$ diff src/minimake/genmake.old src/minimake/genmake
41c41
<               freebsd|bsdi*|darwin|netbsd|openbsd) echo "Making
$BBOS makefile"
---
>               freebsd|bsdi*|darwin|netbsd) echo "Making $BBOS makefile"
43a44,46
>               openbsd) echo "Making $BBOS makefile"
>                         CFLAGS="${CFLAGS} -DZOMBIE -D${BBOS} -DGETTIMEOFDAY -DREGEXEC -O -ftrampolines"
>                 ;;

I believe this only affects OpenBSD 3.7 and higher.  It might affect
other BSD's, but OpenBSD now disables the use of trampolines by
default in it's stock GCC for security.  To enable this, you must add
-ftrampolines to your $CFLAGS.  My GCC version is:

gcc (GCC) 3.3.5 (propolice) on OpenBSD 3.8 i386

After fixing your genmake file, you can continue to make, make install, etc.

Hope that helps,

-Russ

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