--tag=LD added r23745 prevents successful compilation of GDAL trunk in OSX 10.6

[dustymugs]

The addition of --tag=LD in r23745 prevents GDAL trunk from compiling to completion. If --tag=LD is removed, GDAL trunk compiles successfully.

In the compile output, libtool outputs the following

libtool: link: ignoring unknown tag LD

The above message is also present in the output on Linux 64-bit but Linux compiles successfully with or without --tag=LD

[jorgearevalo]

I confirm the problem. The addition of --tag=LD breaks my build in Mac OS X 10.6.8. It compiles fine if removed.

[warmerdam]

Lets try to address this in the original ticket that led to this addition (#4436).