Trying to install psqlodbc-08.03.0300 on Mac gets me this while I configure:
client-6X-XXX-17-X14:~ brent1a$ cd /psqlodbc-08.03.0300 client-6X-XXX-17-X14:psqlodbc-08.03.0300 brent1a$ sudo ./configure checking for a BSD-compatible install... /usr/bin/install -c checking whether build environment is sane... yes checking for gawk... gawk checking whether make sets $(MAKE)... yes checking whether to enable maintainer-specific portions of Makefiles... no checking for pg_config... no configure: error: pg_config not found (set PG_CONFIG environment variable) client-6X-XXX-17-X14:psqlodbc-08.03.0300 brent1a$