From the build log: cc -o src/bcon.os -c -std=c99 -pedantic -O2 -pipe -O3 -Wall -ggdb D_POSIX_SOURCE -DMONGO_HAVE_STDINT -fPIC -DMONGO_DLL_BUILD src/bcon.c cc -o src/bson.os -c -std=c99 -pedantic -O2 -pipe -O3 -Wall -ggdb D_POSIX_SOURCE -DMONGO_HAVE_STDINT -fPIC -DMONGO_DLL_BUILD src/bson.c
@ultrabug: Do we want to fix this or only focus on newer versions? These might stay around for a while since there's a lot of abi stuff for people implementing it.
Thanks Chema, it's fixed in tree