cmake: add support for sccache

CMakeLists.txt

@@ -50,12 +50,27 @@ endif()
 
 project(monero)
 
-option (USE_CCACHE "Use ccache if a usable instance is found" ON)
-if (USE_CCACHE)
-	include(FindCcache) # Has to be included after the project() macro, to be able to read the CXX variable.
+option (USE_COMPILER_CACHE "Use compiler cache if a usable instance is found (sccache/ccache)" ON)
+if (USE_COMPILER_CACHE)
+    find_program(SCCACHE sccache)
+    find_program(CCACHE ccache)
+    if (SCCACHE)
+        message(STATUS "Using sccache: ${SCCACHE}")
+        set(CMAKE_C_COMPILER_LAUNCHER   "${SCCACHE}")
+        set(CMAKE_CXX_COMPILER_LAUNCHER "${SCCACHE}")
+        # Remove this line and uncomment the one below when FCMP++ Rust libraries are merged.
+        # set(ENV{RUSTC_WRAPPER} "${SCCACHE}")
+    elseif (CCACHE)
+        message(STATUS "Using ccache: ${CCACHE}")
+        set(CMAKE_C_COMPILER_LAUNCHER   "${CCACHE}")
+        set(CMAKE_CXX_COMPILER_LAUNCHER "${CCACHE}")
+    else()
+        message(STATUS "No compiler cache found")
+    endif()
 else()
-	message(STATUS "ccache deselected")
+    message(STATUS "Compiler cache deselected")
 endif()
+
 option (USE_COMPILATION_TIME_PROFILER "Use compilation time profiler (for CLang >= 9 only)" OFF)
 if (USE_COMPILATION_TIME_PROFILER)
 	if (NOT "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")

cmake/FindCcache.cmake

@@ -1,67 +0,0 @@
-# Copyright (c) 2014-2024, The Monero Project
-#
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without modification, are
-# permitted provided that the following conditions are met:
-#
-# 1. Redistributions of source code must retain the above copyright notice, this list of
-#    conditions and the following disclaimer.
-#
-# 2. Redistributions in binary form must reproduce the above copyright notice, this list
-#    of conditions and the following disclaimer in the documentation and/or other
-#    materials provided with the distribution.
-#
-# 3. Neither the name of the copyright holder nor the names of its contributors may be
-#    used to endorse or promote products derived from this software without specific
-#    prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
-# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
-# THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
-# THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-# - Try to find readline include dirs and libraries 
-#
-# Automatically finds ccache build accelerator, if it's found in PATH.
-#
-# Usage of this module as follows:
-#
-#     project(monero)
-#     include(FindCcache) # Include AFTER the project() macro to be able to reach the CMAKE_CXX_COMPILER variable
-#
-# Properties modified by this module:
-#
-#  GLOBAL PROPERTY RULE_LAUNCH_COMPILE     set to ccache, when ccache found
-#  GLOBAL PROPERTY RULE_LAUNCH_LINK        set to ccache, when ccache found
-
-find_program(CCACHE_FOUND ccache)
-if (CCACHE_FOUND)
-	# Try to compile a test program with ccache, in order to verify if it really works. (needed on exotic setups)
-	set(TEST_PROJECT "${CMAKE_BINARY_DIR}/${CMAKE_FILES_DIRECTORY}/CMakeTmp")
-	file(WRITE "${TEST_PROJECT}/CMakeLists.txt" [=[
-cmake_minimum_required(VERSION 3.10)
-project(test)
-option (CCACHE "")
-file(WRITE "${CMAKE_SOURCE_DIR}/test.cpp" "int main() { return 0; }")
-set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${CCACHE}")
-set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK    "${CCACHE}")
-add_executable(main test.cpp)
-]=])
-	try_compile(RET "${TEST_PROJECT}/build" "${TEST_PROJECT}" "test" CMAKE_FLAGS -DCCACHE="${CCACHE_FOUND}")
-	unset(TEST_PROJECT)
-	if (${RET})
-		# Success
-		message(STATUS "Found usable ccache: ${CCACHE_FOUND}")
-		set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${CCACHE_FOUND}")
-		set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK    "${CCACHE_FOUND}")
-	else()
-		message(STATUS "Found ccache ${CCACHE_FOUND}, but is UNUSABLE! Return code: ${RET}")
-	endif()
-else()
-	message(STATUS "ccache NOT found! Please install it for faster rebuilds.")
-endif()

contrib/guix/libexec/build.sh

@@ -336,7 +336,7 @@ mkdir -p "$DISTSRC"
     esac
 
     # Turn off unused default options
-    CMAKEFLAGS+=" -DUSE_CCACHE=OFF -DBUILD_DOCUMENTATION=OFF"
+    CMAKEFLAGS+=" -DUSE_COMPILER_CACHE=OFF -DBUILD_DOCUMENTATION=OFF"
 
     # Configure this DISTSRC for $HOST
     # shellcheck disable=SC2086

utils/health/clang-build-time-analyzer-run.sh

@@ -56,7 +56,7 @@ mkdir -p "$DIR_BUILD" && cd "$DIR_BUILD"
 cmake ../.. \
 -DCMAKE_C_COMPILER=clang \
 -DCMAKE_CXX_COMPILER=clang++ \
--DUSE_CCACHE=OFF \
+-DUSE_COMPILER_CACHE=OFF \
 -DUSE_COMPILATION_TIME_PROFILER=ON \
 -DBUILD_SHARED_LIBS=ON \
 -DBUILD_TESTS=ON

utils/health/clang-include-what-you-use-run.sh

@@ -56,7 +56,7 @@ UWYU_COMMAND="$PROG;-Xiwyu;any;-Xiwyu;iwyu;-Xiwyu;args" # Copy-pasted from the u
 cmake ../.. \
 -DCMAKE_C_COMPILER=clang \
 -DCMAKE_CXX_COMPILER=clang++ \
--DUSE_CCACHE=ON \
+-DUSE_COMPILER_CACHE=ON \
 -DCMAKE_C_INCLUDE_WHAT_YOU_USE="$UWYU_COMMAND" \
 -DCMAKE_CXX_INCLUDE_WHAT_YOU_USE="$UWYU_COMMAND" \
 -DBUILD_SHARED_LIBS=ON \

utils/health/clang-tidy-run-common.sh

@@ -45,7 +45,7 @@ function tidy_for_language() {
 	cmake ../.. \
 	-DCMAKE_C_COMPILER=clang \
 	-DCMAKE_CXX_COMPILER=clang++ \
-	-DUSE_CCACHE=ON \
+	-DUSE_COMPILER_CACHE=ON \
 	-DUSE_CLANG_TIDY_${LANG}=ON \
 	-DBUILD_SHARED_LIBS=ON \
 	-DBUILD_TESTS=ON