Try fixing LLVM issues on OSX

(Also, get a decent grep)

.travis.yml

@@ -18,10 +18,11 @@ install:
 - 'if [[ -f ".travis/${TRAVIS_OS_NAME}_install.sh" ]]; then . .travis/${TRAVIS_OS_NAME}_install.sh; fi'
 script:
 - 'if [[ -f ".travis/${TRAVIS_OS_NAME}_script.sh" ]]; then . .travis/${TRAVIS_OS_NAME}_script.sh; fi'
-- export DEFAULT_TARGET=$(rustup show | grep default | grep -Po "^[^-]+-\K\S+")
+- [ "$TRAVIS_OS_NAME" = linux ] && export GREP=grep || export GREP=ggrep
+- export DEFAULT_TARGET=$(rustup show | grep default | $GREP -Po "^[^-]+-\K\S+")
 - pushd tcod_sys; cargo build --features generate_bindings; popd
 - 'export BINDINGS_FILE=${DEFAULT_TARGET}_bindings.rs; echo "$BINDINGS_FILE download:"'
-- curl -F "file=@./tcod_sys/${BINDINGS_FILE}" https://file.io/ | grep -Po '"link":"\K[^"]+'
+- curl -F "file=@./tcod_sys/${BINDINGS_FILE}" https://file.io/ | $GREP -Po '"link":"\K[^"]+'
 - cargo build --verbose
 - cargo test --verbose
 - cargo test --features "rustc-serialize serde" --verbose

.travis/osx_script.sh

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
 
-export PATH="/usr/local/opt/llvm/bin:$PATH"
-export LIBCLANG_PATH="/usr/local/opt/llvm/bin"
+export PATH="$(brew --prefix llvm)/bin:$PATH"
+export LIBCLANG_PATH="$(brew --prefix llvm)/lib"
+

tcod_sys/lib.rs

@@ -1,4 +1,5 @@
 #![allow(non_camel_case_types, non_snake_case, non_upper_case_globals)]
 #![allow(clippy::missing_safety_doc, clippy::redundant_static_lifetimes)]
+#![allow(improper_ctypes)]
 
 include!(concat!("./", env!("BINDINGS_TARGET"), "_bindings.rs"));