Build rust bindings against header files under current source dir

Without this, it was using the headers from /usr/include, and on my
machine it failed with the following:
```
$ cmake .. -DRUST_BINDINGS=$(gcc -dumpmachine) && make
/boringssl/rust/rust_wrapper.c: In function
‘ERR_GET_FUNC_RUST’:
/usr/local/google/home/yukl/boringssl/rust/rust_wrapper.c:27:10: error:
implicit declaration of function ‘ERR_GET_FUNC’; did you mean
‘ERR_GET_LIB’? [-Werror=implicit-function-declaration]
   27 |   return ERR_GET_FUNC(packed_error);
      |          ^~~~~~~~~~~~
      |          ERR_GET_LIB
```

Change-Id: Ia34830c939f32a8807e1c8be03d962c21dfc1635
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/55932
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: Matthew Maurer <mmaurer@google.com>
Reviewed-by: Adam Langley <agl@google.com>
1 file changed
tree: 9d176f92b9517eb2f07129d0926b22021f497dee
  1. .github/
  2. crypto/
  3. decrepit/
  4. fuzz/
  5. include/
  6. rust/
  7. ssl/
  8. third_party/
  9. tool/
  10. util/
  11. .clang-format
  12. .gitignore
  13. API-CONVENTIONS.md
  14. BREAKING-CHANGES.md
  15. BUILDING.md
  16. CMakeLists.txt
  17. codereview.settings
  18. CONTRIBUTING.md
  19. FUZZING.md
  20. go.mod
  21. go.sum
  22. INCORPORATING.md
  23. LICENSE
  24. OpenSSLConfig.cmake
  25. PORTING.md
  26. README.md
  27. SANDBOXING.md
  28. sources.cmake
  29. STYLE.md
README.md

BoringSSL

BoringSSL is a fork of OpenSSL that is designed to meet Google's needs.

Although BoringSSL is an open source project, it is not intended for general use, as OpenSSL is. We don't recommend that third parties depend upon it. Doing so is likely to be frustrating because there are no guarantees of API or ABI stability.

Programs ship their own copies of BoringSSL when they use it and we update everything as needed when deciding to make API changes. This allows us to mostly avoid compromises in the name of compatibility. It works for us, but it may not work for you.

BoringSSL arose because Google used OpenSSL for many years in various ways and, over time, built up a large number of patches that were maintained while tracking upstream OpenSSL. As Google's product portfolio became more complex, more copies of OpenSSL sprung up and the effort involved in maintaining all these patches in multiple places was growing steadily.

Currently BoringSSL is the SSL library in Chrome/Chromium, Android (but it's not part of the NDK) and a number of other apps/programs.

Project links:

There are other files in this directory which might be helpful: