Idwer Vollering ([email protected]) just uploaded a new patch set to gerrit, 
which you can find at http://review.coreboot.org/2342

-gerrit

commit 12dfd5dda09cf57edfd9ce189cb0384113da53d2
Author: Idwer Vollering <[email protected]>
Date:   Sat Feb 9 23:58:06 2013 +0100

    crossgcc: don't use libdl while building GDB on FreeBSD
    
    crossgcc: fix building GDB on FreeBSD (and possibly NetBSD/OpenBSD).
    
    Since FreeBSD doesn't have libdl, these errors are shown:
    - config.log: /usr/bin/ld: cannot find -ldl
    - crossgcc-build.log: configure: error: C compiler cannot create executables
    
    Conditionally remove -ldl from LDFLAGS.
    
    Change-Id: I79c48da7e6700a4606c9e0c1314241db8997d3f3
    Signed-off-by: Idwer Vollering <[email protected]>
---
 util/crossgcc/buildgcc | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/util/crossgcc/buildgcc b/util/crossgcc/buildgcc
index eaff24d..90e45d5 100755
--- a/util/crossgcc/buildgcc
+++ b/util/crossgcc/buildgcc
@@ -562,11 +562,19 @@ printf "Building GDB ${GDB_VERSION} ... "
        cd build-gdb
        export PYTHONHOME=$DESTDIR$TARGETDIR
        rm -f .failed
+       if [ $(uname) = "FreeBSD" -o $(uname) = "NetBSD" ] ; then
        LDFLAGS="-Wl,-rpath,\$\$ORIGIN/../lib/ -L$DESTDIR$TARGETDIR/lib \
-                -lpthread -ldl -lutil" \
+                -lpthread -lutil" \
        CC="$CC" CFLAGS="$HOSTCFLAGS -I$DESTDIR$TARGETDIR/include" \
        ../gdb-${GDB_VERSION}/configure --prefix=$TARGETDIR \
                --target=${TARGETARCH} --disable-werror --disable-nls
+       else
+       LDFLAGS="-Wl,-rpath,\$\$ORIGIN/../lib/ -L$DESTDIR$TARGETDIR/lib \
+               -lpthread -ldl -lutil" \
+       CC="$CC" CFLAGS="$HOSTCFLAGS -I$DESTDIR$TARGETDIR/include" \
+       ../gdb-${GDB_VERSION}/configure --prefix=$TARGETDIR \
+               --target=${TARGETARCH} --disable-werror --disable-nls
+       fi
        $MAKE $JOBS || touch .failed
        $MAKE install DESTDIR=$DESTDIR || touch .failed
        if [ ! -f .failed ]; then touch .success; fi

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