bitcoin/bitcoin — pull request #1990 by robbak (2012-11-06 12:09:44+00:00)
Title: use $(MAKE) in the makefile, so FreeBSD will use the right make tool (gmake)

After the leveldb import, src/makefile.unix has the 'make' command for leveldb hard coded. When a build is run on FreeBSD, it uses the system make, which uses different syntaxes.
Using the macro $(MAKE) will cause it to run gmake, and the build will work.