CSSC @1.4.0 does not build: #error "Please include config.h first."

[ryandesign (Ryan Carsten Schmidt)]

René J.V. Bertin reported on the mailing list that CSSC @1.4.0 does not build on Snow Leopard:

:info:build In file included from /usr/include/c++/4.2.1/i686-apple-darwin10/x86_64/bits/os_defines.h:61,
:info:build                  from /usr/include/c++/4.2.1/i686-apple-darwin10/x86_64/bits/c++config.h:41,
:info:build                  from /usr/include/c++/4.2.1/cstdio:50,
:info:build                  from bodyio.h:26,
:info:build                  from bodyio.cc:26:
:info:build ../gl/lib/unistd.h:135:3: error: #error "Please include config.h first."

I am able to reproduce this issue on Snow Leopard with gcc 4.2.1, but it builds fine on later versions of OS X with clang. The problem may be specific to older versions of GCC. It was also ​reported to the developers by someone using GCC 4.4.7 on Linux. I am not able to reproduce it with GCC 4.8.3 on OS X 10.10 beta.

The problem seems to be that the project provides a wrapper around the system header unistd.h, which requires that the project-specific file config.h first be included, but this is not being done in every instance.

The developers ​provided ​a patch. The patch did not apply cleanly to the 1.4.0 sources (in the portion targeting the file file.cc). After fixing that, the build still failed with a similar error, this time in version.cc. version.cc does not include unistd.h, but it includes another system header, stdio.h. Perhaps stdio.h or one of the files it eventually includes includes unistd.h.

[ryandesign (Ryan Carsten Schmidt)]

I just realized some of the file being patched are autotools files, so I should be running autoreconf. I'll try that later.

[ryandesign (Ryan Carsten Schmidt)]

Running autoreconf didn't help, but just making a similar change in version.cc seems to be all that was still needed. Committed in r126199.

[cooljeanius (Eric Gallager)]

Cc Me!