Small CMake setup improvements (#229)

This commit includes two kinds of changes:
1. It makes various tools (binaryen, wasm-tools, wasmtime, weval, and wizer) that are installed during configuration available to embeddings by moving the variables into the CMake variables cache
2. It changes the OpenSSL configuration to ignore patches that are applied multiple times, making the configuration more robust

The latter change is needed in situations where an embedding moves to a different version of StarlingMonkey without deleting the build dir. That causes the OpenSSL config to be reapplied, while the old, already patched, files are kept around.

Author: tschneidereit

cmake/binaryen.cmake

@@ -8,7 +8,7 @@ endif()
 set(BINARYEN_URL https://github.com/WebAssembly/binaryen/releases/download/version_${BINARYEN_VERSION}/binaryen-version_${BINARYEN_VERSION}-${BINARYEN_ARCH}-${HOST_OS}.tar.gz)
 CPMAddPackage(NAME binaryen URL ${BINARYEN_URL} DOWNLOAD_ONLY TRUE)
 set(BINARYEN_DIR ${CPM_PACKAGE_binaryen_SOURCE_DIR}/bin)
-set(WASM_OPT ${BINARYEN_DIR}/wasm-opt)
+set(WASM_OPT ${BINARYEN_DIR}/wasm-opt CACHE FILEPATH "Path to wasm-opt binary")
 
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/scripts/cxx-wrapper.in ${CMAKE_BINARY_DIR}/cxx-wrapper)
 set(CMAKE_CXX_COMPILER "${CMAKE_BINARY_DIR}/cxx-wrapper")

cmake/openssl.cmake

@@ -18,8 +18,8 @@ ExternalProject_Add(
         URL_HASH SHA256=83049d042a260e696f62406ac5c08bf706fd84383f945cf21bd61e9ed95c396e
         USES_TERMINAL_DOWNLOAD TRUE
         PATCH_COMMAND
-        patch -d ${OPENSSL_SOURCE_DIR} -p1 < ${CMAKE_CURRENT_SOURCE_DIR}/deps/patches/getuid.patch &&
-        patch -d ${OPENSSL_SOURCE_DIR} -p1 < ${CMAKE_CURRENT_SOURCE_DIR}/deps/patches/rand.patch
+        patch -d ${OPENSSL_SOURCE_DIR} -t -p1 < ${CMAKE_CURRENT_SOURCE_DIR}/deps/patches/getuid.patch &&
+        patch -d ${OPENSSL_SOURCE_DIR} -t -p1 < ${CMAKE_CURRENT_SOURCE_DIR}/deps/patches/rand.patch
         CONFIGURE_COMMAND
         CC="clang" CFLAGS="--sysroot=${WASI_SDK_PREFIX}/share/wasi-sysroot" ${OPENSSL_SOURCE_DIR}/config
         --prefix=${OPENSSL_INSTALL_DIR}

cmake/wasm-tools.cmake

@@ -3,4 +3,4 @@ set(WASM_TOOLS_VERSION 1.0.54)
 set(WASM_TOOLS_URL https://github.com/bytecodealliance/wasm-tools/releases/download/wasm-tools-${WASM_TOOLS_VERSION}/wasm-tools-${WASM_TOOLS_VERSION}-${HOST_ARCH}-${HOST_OS}.tar.gz)
 CPMAddPackage(NAME wasm-tools URL ${WASM_TOOLS_URL} DOWNLOAD_ONLY TRUE)
 set(WASM_TOOLS_DIR ${CPM_PACKAGE_wasm-tools_SOURCE_DIR})
-set(WASM_TOOLS_BIN ${WASM_TOOLS_DIR}/wasm-tools)
+set(WASM_TOOLS_BIN ${WASM_TOOLS_DIR}/wasm-tools CACHE FILEPATH "Path to wasm-tools binary")

cmake/wasmtime.cmake

@@ -2,4 +2,4 @@ set(WASMTIME_VERSION v29.0.0)
 set(WASMTIME_URL https://github.com/bytecodealliance/wasmtime/releases/download/${WASMTIME_VERSION}/wasmtime-${WASMTIME_VERSION}-${HOST_ARCH}-${HOST_OS}.tar.xz)
 CPMAddPackage(NAME wasmtime URL ${WASMTIME_URL} DOWNLOAD_ONLY TRUE)
 set(WASMTIME_DIR ${CPM_PACKAGE_wasmtime_SOURCE_DIR})
-set(WASMTIME ${WASMTIME_DIR}/wasmtime)
+set(WASMTIME ${WASMTIME_DIR}/wasmtime CACHE FILEPATH "Path to wasmtime binary")

cmake/weval.cmake

@@ -3,4 +3,4 @@ set(WEVAL_VERSION v0.3.2)
 set(WEVAL_URL https://github.com/bytecodealliance/weval/releases/download/${WEVAL_VERSION}/weval-${WEVAL_VERSION}-${HOST_ARCH}-${HOST_OS}.tar.xz)
 CPMAddPackage(NAME weval URL ${WEVAL_URL} DOWNLOAD_ONLY TRUE)
 set(WEVAL_DIR ${CPM_PACKAGE_weval_SOURCE_DIR})
-set(WEVAL_BIN ${WEVAL_DIR}/weval)
+set(WEVAL_BIN ${WEVAL_DIR}/weval CACHE FILEPATH "Path to weval binary")

cmake/wizer.cmake

@@ -3,3 +3,4 @@ set(WIZER_VERSION v3.0.1 CACHE STRING "Version of wizer to use")
 set(WIZER_URL https://github.com/bytecodealliance/wizer/releases/download/${WIZER_VERSION}/wizer-${WIZER_VERSION}-${HOST_ARCH}-${HOST_OS}.tar.xz)
 CPMAddPackage(NAME wizer URL ${WIZER_URL} DOWNLOAD_ONLY TRUE)
 set(WIZER_DIR ${CPM_PACKAGE_wizer_SOURCE_DIR})
+set(WIZER_BIN ${WIZER_DIR}/wizer CACHE FILEPATH "Path to wizer binary")