Fix CI cache (#411)

Signed-off-by: Neil Shen <overvenus@gmail.com>

.travis.yml

@@ -5,6 +5,9 @@ cache:
   directories:
     - $HOME/.cargo
     - $HOME/.cache
+    - $TRAVIS_BUILD_DIR/target
+before_cache:
+  - find $TRAVIS_BUILD_DIR/target/debug -maxdepth 1 -type f -delete
 
 env:
   global:
@@ -26,12 +29,13 @@ before_script:
   - export PATH="$PATH:$HOME/.cache/bin:$HOME/.cargo/bin"
   - GRPC_HEADER="$HOME/.cache/include/grpc/grpc.h"
   - if [[ $TRAVIS_OS_NAME == "osx" ]] && [[ ! -f $GRPC_HEADER ]]; then
-      export CC=clang;
       brew update && brew install autoconf libtool shtool;
     fi
   - if [[ $TRAVIS_OS_NAME == "osx" ]]; then
       brew update && brew install openssl -f;
       export OPENSSL_ROOT_DIR=$(brew --prefix openssl);
+      export LIBRARY_PATH="$(brew --prefix openssl)/lib";
+      export CC=clang;
     else
       sudo apt-get update && sudo apt-get -y install libssl-dev;
     fi
@@ -46,7 +50,7 @@ before_script:
   - export CPLUS_INCLUDE_PATH="$HOME/.cache/include"
   - export LD_LIBRARY_PATH="$HOME/.cache/lib"
   - export DYLD_LIBRARY_PATH="$HOME/.cache/lib"
-  - export LIBRARY_PATH="$HOME/.cache/lib"
+  - export LIBRARY_PATH="$HOME/.cache/lib":$LIBRARY_PATH
   - export PKG_CONFIG_PATH="$HOME/.cache/lib/pkgconfig"
 
 script:

grpc-sys/build.rs

@@ -143,7 +143,6 @@ fn build_grpc(cc: &mut Build, library: &str) {
         config.define("gRPC_BENCHMARK_PROVIDER", "none");
         if cfg!(feature = "openssl") {
             config.define("gRPC_SSL_PROVIDER", "package");
-            config.define("EMBED_OPENSSL", "false");
             // Problem is: Ubuntu Trusty shipped with openssl 1.0.1f. Which doesn't
             // support alpn. And Google's gRPC checks for support of ALPN in plane
             // old Makefile, but not in CMake.
@@ -222,8 +221,10 @@ fn figure_ssl_path(build_dir: &str) {
     }
     if cnt != 2 {
         panic!(
-            "CMake cache invalid, file {} contains {} ssl keys!",
-            path, cnt
+            "CMake cache invalid, file {} contains {} ssl keys!\nCMakeCache.txt:\n{}",
+            path,
+            cnt,
+            std::fs::read_to_string(&path).unwrap()
         );
     }
     println!("cargo:rustc-link-lib=ssl");