make it possible to cross-compile for iOS and Android targets (#285)

tikv · Feb 15, 2019 · 7189d27 · 7189d27
1 parent 9b27a5a
commit 7189d27
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diff --git a/cross_compile.md b/cross_compile.md
@@ -47,20 +47,6 @@ yum install mingw64-openssl-static mingw64-zlib-static mingw64-winpthreads-stati
     let mut zlib = "zlibstaticd";
 ```
 
-## Fix try_run
-
-```
-# grpc-rs/grpc-sys/grpc/third_party/benchmark/cmake/CXXFeatureCheck.cmake
-# add these code to fix try_run
-SET( RUN_HAVE_STD_REGEX
-     0
-     CACHE STRING "Result from TRY_RUN" FORCE)
-
-SET( RUN_HAVE_STEADY_CLOCK
-     0
-     CACHE STRING "Result from TRY_RUN" FORCE)
-```
-
 ## Fix WIN32 API
 
 ```

diff --git a/grpc-sys/build.rs b/grpc-sys/build.rs
@@ -81,12 +81,54 @@ fn build_grpc(cc: &mut Build, library: &str) {
         if env::var("CARGO_CFG_TARGET_ENV").unwrap_or("".to_owned()) == "musl" {
             config.define("CMAKE_CXX_COMPILER", "g++");
         }
+
+        // Cross-compile support for iOS
+        match env::var("TARGET").unwrap_or("".to_owned()).as_str() {
+            "aarch64-apple-ios" => {
+                config
+                    .define("CMAKE_OSX_SYSROOT", "iphoneos")
+                    .define("CMAKE_OSX_ARCHITECTURES", "arm64");
+            }
+            "armv7-apple-ios" => {
+                config
+                    .define("CMAKE_OSX_SYSROOT", "iphoneos")
+                    .define("CMAKE_OSX_ARCHITECTURES", "armv7");
+            }
+            "armv7s-apple-ios" => {
+                config
+                    .define("CMAKE_OSX_SYSROOT", "iphoneos")
+                    .define("CMAKE_OSX_ARCHITECTURES", "armv7s");
+            }
+            "i386-apple-ios" => {
+                config
+                    .define("CMAKE_OSX_SYSROOT", "iphonesimulator")
+                    .define("CMAKE_OSX_ARCHITECTURES", "i386");
+            }
+            "x86_64-apple-ios" => {
+                config
+                    .define("CMAKE_OSX_SYSROOT", "iphonesimulator")
+                    .define("CMAKE_OSX_ARCHITECTURES", "x86_64");
+            }
+            _ => {}
+        };
+
+        // Allow overriding of the target passed to cmake
+        // (needed for Android crosscompile)
+        match env::var("CMAKE_TARGET_OVERRIDE") {
+            Ok(val) => {
+                config.target(&val);
+            }
+            Err(_) => {}
+        };
+
         // We don't need to generate install targets.
         config.define("gRPC_INSTALL", "false");
         // We don't need to build csharp target.
         config.define("gRPC_BUILD_CSHARP_EXT", "false");
         // We don't need to build codegen target.
         config.define("gRPC_BUILD_CODEGEN", "false");
+        // We don't need to build benchmarks.
+        config.define("gRPC_BENCHMARK_PROVIDER", "none");
         if cfg!(feature = "openssl") {
             config.define("gRPC_SSL_PROVIDER", "package");
             config.define("EMBED_OPENSSL", "false");