build: make outputs independent of the checkout path

CMakeLists.txt

@@ -1,6 +1,11 @@
 cmake_minimum_required(VERSION 3.10)
 project(gdk VERSION 0.77.7 LANGUAGES C CXX)
 
+# Keep the absolute checkout path out of compiled output.
+if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang|AppleClang")
+    add_compile_options("-ffile-prefix-map=${CMAKE_SOURCE_DIR}=.")
+endif()
+
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 

cmake/includes/helpers.cmake

@@ -63,7 +63,7 @@ macro(create_gdkrust_target)
     # cmake_path(GET OPENSSL_INCLUDE_DIR ROOT_DIRECTORY OPENSSL_ROOT_DIR)
     set(OPENSSL_ROOT_DIR ${CMAKE_PREFIX_PATH})
     add_custom_target(cargo-cmd
-        COMMAND ${_buildTool} "${CMAKE_BUILD_TYPE}" "${_rustTriple}" "${ANDROID_TOOLCHAIN_ROOT}" ${CMAKE_AR} ${OPENSSL_INCLUDE_DIR} ${OPENSSL_CRYPTO_LIBRARY} ${_gdkRustSrcDir} ${_gdkRustBuildDir} ${_gdkRustLibArtifact} "${CMAKE_OSX_DEPLOYMENT_TARGET}"
+        COMMAND ${_buildTool} "${CMAKE_BUILD_TYPE}" "${_rustTriple}" "${ANDROID_TOOLCHAIN_ROOT}" ${CMAKE_AR} ${OPENSSL_INCLUDE_DIR} ${OPENSSL_CRYPTO_LIBRARY} ${_gdkRustSrcDir} ${_gdkRustBuildDir} ${_gdkRustLibArtifact} "${CMAKE_OSX_DEPLOYMENT_TARGET}" "${CMAKE_SOURCE_DIR}"
         VERBATIM
         BYPRODUCTS ${_gdkRustLibArtifact}
         WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}

tools/buildgdk_rust.sh

@@ -11,6 +11,7 @@ SOURCE_DIR="$1"; shift
 OUTPUT_DIR="$1"; shift
 ARTIFACT="$1"; shift
 export MACOSX_DEPLOYMENT_TARGET=$1; shift
+GDK_ROOT="$1"; shift
 
 export CC_i686_linux_android=i686-linux-android23-clang
 export CARGO_TARGET_I686_LINUX_ANDROID_LINKER=${CC_i686_linux_android}
@@ -22,6 +23,12 @@ export CC_aarch64_linux_android=aarch64-linux-android23-clang
 export CARGO_TARGET_AARCH64_LINUX_ANDROID_LINKER=${CC_aarch64_linux_android}
 export AR=${ARCHIVER}
 
+# rustc flags this script must contribute.
+GDK_RUSTC_FLAGS=()
+if [ -n "${GDK_ROOT}" ]; then
+    GDK_RUSTC_FLAGS+=("--remap-path-prefix=${GDK_ROOT}=.")
+fi
+
 export CARGO_REGISTRIES_CRATES_IO_PROTOCOL=sparse
 
 
@@ -36,6 +43,7 @@ ARTIFACT_PATH_HINT=${OUTPUT_DIR}
 CARGO_ARGS=()
 CARGO_ARGS+=("--manifest-path=${SOURCE_DIR}/Cargo.toml")
 CARGO_ARGS+=("--target-dir=${OUTPUT_DIR}")
+CARGO_ARGS+=("--locked")
 
 if [ "$BUILDTYPE" == "Release" ]; then
     CARGO_ARGS+=("--release")
@@ -91,7 +99,7 @@ fi
 
 if [[ ${TRIPLE} == *"android"* ]];then
     export PATH=${PATH}:${ANDROID_TOOLCHAIN_ROOT}/bin
-    export RUSTFLAGS="-L${SOURCE_DIR}/libgcc"
+    GDK_RUSTC_FLAGS+=("-L${SOURCE_DIR}/libgcc")
 elif [[ ${TRIPLE} == "aarch64-apple-ios" ]]; then
     LD_ARCH="-arch arm64 -platform_version ios ${MACOSX_DEPLOYMENT_TARGET} ${MACOSX_DEPLOYMENT_TARGET}"
 elif [[ ${TRIPLE} == "x86_64-apple-ios" ]]; then
@@ -104,6 +112,25 @@ elif [[ ${TRIPLE} == "x86_64-apple-darwin" ]]; then
     LD_ARCH="-arch x86_64 -platform_version macos ${MACOSX_DEPLOYMENT_TARGET} ${MACOSX_DEPLOYMENT_TARGET}"
 fi
 
+# Cargo uses CARGO_ENCODED_RUSTFLAGS instead of RUSTFLAGS when the encoded
+# variable is set, even when it is empty. Append to the source Cargo will use.
+if [ ${#GDK_RUSTC_FLAGS[@]} -gt 0 ]; then
+    if [ -n "${CARGO_ENCODED_RUSTFLAGS+set}" ]; then
+        _gdk_us=$'\x1f'
+        for _gdk_flag in "${GDK_RUSTC_FLAGS[@]}"; do
+            CARGO_ENCODED_RUSTFLAGS="${CARGO_ENCODED_RUSTFLAGS:+${CARGO_ENCODED_RUSTFLAGS}${_gdk_us}}${_gdk_flag}"
+        done
+        export CARGO_ENCODED_RUSTFLAGS
+        unset _gdk_us _gdk_flag
+    else
+        for _gdk_flag in "${GDK_RUSTC_FLAGS[@]}"; do
+            RUSTFLAGS="${RUSTFLAGS:+${RUSTFLAGS} }${_gdk_flag}"
+        done
+        export RUSTFLAGS
+        unset _gdk_flag
+    fi
+fi
+
 # behaving correctly when no-op
 oldT=$(date +%s)