Summary:
One gets very obscure errors when trying to run infer for clang when it was
compiled for Java, or vice-versa. This diff makes sure we crash early with the
appropriate error message. For instance:
```
$ ./build-infer java
$ infer -- clang -c hello.c
Uncaught exception:
(Failure
"Unsupported build mode: make/cc\
\nInfer was built with clang analyzers disabled.\
\nPlease rebuild infer with clang enabled.\
\n")
Raised at file "pervasives.ml", line 30, characters 22-33
Called from file "backend/infer.ml", line 398, characters 6-48
Called from file "backend/infer.ml", line 449, characters 20-38
$ infer --clang-compilation-db-files foo.json
Uncaught exception:
(Failure
"Unsupported build mode: clang compilation database\
\nInfer was built with clang analyzers disabled.\
\nPlease rebuild infer with clang enabled.\
\n")
Raised at file "pervasives.ml", line 30, characters 22-33
Called from file "backend/infer.ml", line 392, characters 8-65
Called from file "backend/infer.ml", line 449, characters 20-38
```
Reviewed By: sblackshear
Differential Revision: D4566641
fbshipit-source-id: d9a118f
Jules Villard
f796ba6bb8