fix: try to set cargo target for CI

CMakeLists.txt

@@ -4,6 +4,45 @@ set(CORROSION_VERBOSE_OUTPUT ON)
 set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED 1)
 
+
+
+# Propagate arch to rust build for CI
+set(Rust_CARGO_TARGET "")
+if("${OS_NAME}" STREQUAL "linux")
+    if ("${OS_ARCH}" STREQUAL "arm64")
+        set(Rust_CARGO_TARGET "aarch64-unknown-linux-gnu")
+    elseif("${CMAKE_CXX_COMPILER}" MATCHES "aarch64")
+        set(Rust_CARGO_TARGET ${RUST_ENV_VARS} CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=aarch64-linux-gnu-gcc)
+        set(Rust_CARGO_TARGET "aarch64-unknown-linux-gnu")
+    else()
+        set(Rust_CARGO_TARGET "x86_64-unknown-linux-gnu")
+    endif()
+elseif("${OS_NAME}" STREQUAL "osx")
+    if ("${OSX_BUILD_ARCH}" STREQUAL "arm64")
+        set(Rust_CARGO_TARGET "aarch64-apple-darwin")
+    elseif ("${OSX_BUILD_ARCH}" STREQUAL "x86_64")
+        set(Rust_CARGO_TARGET "x86_64-apple-darwin")
+    elseif ("${OS_ARCH}" STREQUAL "arm64")
+        set(Rust_CARGO_TARGET "aarch64-apple-darwin")
+    endif()
+elseif(WIN32)
+    if (MINGW AND "${OS_ARCH}" STREQUAL "arm64")
+        set(Rust_CARGO_TARGET "aarch64-pc-windows-gnu")
+    elseif (MINGW AND "${OS_ARCH}" STREQUAL "amd64")
+        set(Rust_CARGO_TARGET "x86_64-pc-windows-gnu")
+    elseif (MSVC AND "${OS_ARCH}" STREQUAL "arm64")
+        set(Rust_CARGO_TARGET "aarch64-pc-windows-msvc")
+    elseif (MSVC AND "${OS_ARCH}" STREQUAL "amd64")
+        set(Rust_CARGO_TARGET "x86_64-pc-windows-msvc")
+    endif()
+endif()
+
+# We currently only support the predefined targets.
+if ("${Rust_CARGO_TARGET}" STREQUAL "")
+    message(FATAL_ERROR "Failed to detect the correct platform")
+endif()
+
+
 include(FetchContent)
 
 FetchContent_Declare(