stderror-override and disable-shared

[lhunath]

First of all, .travis.yml suggests we should pass --enable-stderror-override to ./configure but I don't think that does anything:

configure: WARNING: unrecognized options: --enable-strerror-override

Furthermore, when configuring with --disable-shared (I don't want a .dylib, only a .a), the test build fails:

  CCLD     test1
  CCLD     test2
ld: reference to symbol (which has not been assigned an address) __json_c_strerror in '_json_c_get_random_seed' from /tmp/lto.o for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [test1] Error 1
make[2]: *** Waiting for unfinished jobs....
ld: reference to symbol (which has not been assigned an address) __json_c_strerror in '_main' from /tmp/lto.o for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [test_util_file] Error 1
ld: reference to symbol (which has not been assigned an address) __json_c_strerror in '_json_c_get_random_seed' from /tmp/lto.o for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [test2] Error 1
make[1]: *** [check-am] Error 2
make: *** [check-recursive] Error 1

[hawicz]

The travis problem should have been fixed in commit d8fbfc7.

[hawicz]

The rest was fixed by commit e0e34f0