Will be fixed in 2.x (quite different).
For building OpenCOBOL 1.1 / GNU COBOL 1.1 with clang you need to apply the attached patch and should use at least the following options for configure:
./configure CC=clang CXX=clang++ CPPFLAGS="-std=gnu89 -D__NO_STRING_INLINES=1"
Simon
Discussion: Installing problem with opencobol and macports on OSX 10.8
Last edit: Simon Sobisch 2016-12-23