Add basic test for installing libraries.

test/corrosion_install/CMakeLists.txt

@@ -9,3 +9,19 @@ if(NOT (CMAKE_CROSSCOMPILING AND MSVC))
                          "Hello World! I'm generated code"
     )
 endif()
+
+# Todo: Fix and re-enable tests on Windows
+if(NOT CMAKE_CROSSCOMPILING AND NOT WIN32)
+    corrosion_tests_add_test(install_lib "main-static;main-shared")
+
+    set_tests_properties("install_lib_run_main-static" "install_lib_run_main-shared"
+                         PROPERTIES PASS_REGULAR_EXPRESSION
+                         "The sum is 11"
+    )
+endif()
+
+# Further tests we should add:
+# - Test installing a Rust executable, that requires a (C/C++) shared library at runtime.
+#   Note: We should delete the build directory of the subproject
+#         before running the installed rust executable, to insure the shared library is loaded from the
+#         installed location and not from the build dir.

test/corrosion_install/install_lib/CMakeLists.txt

@@ -0,0 +1,44 @@
+cmake_minimum_required(VERSION 3.15)
+project(test_project VERSION 0.1.0)
+include(ExternalProject)
+
+add_library(static_lib STATIC IMPORTED)
+add_library(shared_lib SHARED IMPORTED)
+set(install_prefix "${CMAKE_CURRENT_BINARY_DIR}/rust_lib")
+set(static_lib_install_path "${install_prefix}/lib/${CMAKE_STATIC_LIBRARY_PREFIX}rust_lib${CMAKE_STATIC_LIBRARY_SUFFIX}")
+set(shared_lib_install_path "${install_prefix}/lib/${CMAKE_SHARED_LIBRARY_PREFIX}rust_lib${CMAKE_SHARED_LIBRARY_SUFFIX}")
+
+
+set_target_properties(static_lib PROPERTIES
+                      IMPORTED_LOCATION
+                      "${static_lib_install_path}")
+
+set_target_properties(shared_lib PROPERTIES
+                      IMPORTED_LOCATION
+                      "${shared_lib_install_path}")
+
+add_executable(main-static main.cpp)
+target_link_libraries(main-static PRIVATE static_lib)
+
+ExternalProject_Add(
+        rust_lib
+        PREFIX "${CMAKE_CURRENT_BINARY_DIR}/rust_lib"
+        SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/rust_lib"
+        CMAKE_ARGS "-DCMAKE_INSTALL_PREFIX=${install_prefix}"
+        # INSTALL_BYPRODUCTS "${static_lib_install_path}"
+)
+
+# Dummy target since INSTALL_BYPRODUCTS requires CMake 3.26
+add_custom_target(build_rust_project_dummy
+                  COMMAND echo dummy
+                  BYPRODUCTS "${static_lib_install_path}" "${shared_lib_install_path}"
+                  DEPENDS rust_lib)
+
+add_dependencies(main-static build_rust_project_dummy)
+
+set(CMAKE_BUILD_RPATH ${install_prefix}/lib)
+add_executable(main-shared main.cpp)
+target_link_libraries(main-shared
+        PUBLIC shared_lib)
+
+add_dependencies(main-shared build_rust_project_dummy)

test/corrosion_install/install_lib/main.cpp

@@ -0,0 +1,11 @@
+#include <stdint.h>
+#include <assert.h>
+#include <iostream>
+
+extern "C" uint64_t add(uint64_t a, uint64_t b);
+
+int main(int argc, char **argv) {
+    uint64_t sum = add(5, 6);
+    assert(sum == 11);
+    std::cout << "The sum is " << sum << std::endl;
+}

test/corrosion_install/install_lib/rust_lib/CMakeLists.txt

@@ -0,0 +1,17 @@
+cmake_minimum_required(VERSION 3.15)
+project(test_project VERSION 0.1.0)
+include(../../../test_header.cmake)
+
+corrosion_import_crate(MANIFEST_PATH Cargo.toml)
+
+if("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux")
+    corrosion_add_target_local_rustflags(rust_lib "-Clink-arg=-Wl,-soname,librust_lib.so")
+    set_target_properties(rust_lib-shared PROPERTIES IMPORTED_SONAME librust_lib.so)
+elseif("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
+    corrosion_add_target_local_rustflags(rust_lib -Clink-arg=-Wl,-install_name,@rpath/librust_lib.dylib,-current_version,1.0,-compatibility_version,1.0)
+    set_target_properties(rust_lib-shared PROPERTIES IMPORTED_NO_SONAME 0)
+    set_target_properties(rust_lib-shared PROPERTIES IMPORTED_SONAME librust_lib.dylib)
+endif()
+
+
+corrosion_install(TARGETS rust_lib)

test/corrosion_install/install_lib/rust_lib/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "rust_lib"
+version = "0.1.0"
+edition = "2018"
+
+[dependencies]
+
+[lib]
+crate-type = ["staticlib", "cdylib"]

test/corrosion_install/install_lib/rust_lib/src/lib.rs

@@ -0,0 +1,5 @@
+
+#[no_mangle]
+pub extern "C" fn add(left: u64, right: u64) -> u64 {
+    left + right
+}