Patch to fix build on sparc
|Target version:||Candidate for next bugfix release|
With the untangled circular dependencies preventing GDAL updates, the GMT build dependencies became installable on the Debian sparc64 port.
The attached patch support both the old 32bit sparc and new 64bit sparc64 ports. The 32bit support is unlikely to be used because the sparc port has been discontinued in Debian, but the sparc64 port is being developed to take its place and is the primary reason for this patch. The patch may also benefit OpenBSD which does still support 32bit sparc IIRC.