build: place executable content into the root of the build

Adjust the output location of the generated executable content to the root of
the build tree.  This is needed primarily on Windows where there is no concept
of a RPATH, and the current directory is scanned for the dependent libraries.

Author: compnerd

CMakeLists.txt

@@ -19,6 +19,12 @@ set(CMAKE_CXX_STANDARD 11)
 
 set(CMAKE_C_VISIBILITY_PRESET hidden)
 
+# NOTE(compnerd) this is a horrible workaround for Windows to ensure that the
+# tests can run as there is no rpath equivalent and `PATH` is used to lookup the
+# libraries.
+set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
+
 set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
 set(THREADS_PREFER_PTHREAD_FLAG TRUE)
 find_package(Threads REQUIRED)

src/CMakeLists.txt

@@ -124,6 +124,7 @@ if(ENABLE_SWIFT)
                       module-maps
                       DispatchStubs
                     LINK_FLAGS
+                      -L $<TARGET_LINKER_FILE_DIR:DispatchStubs>
                       -lDispatchStubs
                       -L $<TARGET_LINKER_FILE_DIR:BlocksRuntime>
                       -lBlocksRuntime