refactor toolchain files

CMakeLists.txt

@@ -297,7 +297,7 @@ endif()
 # Just use -lz and let Xcode figure it out
 # Emscripten does provide Zlib, but it doesn't work with find_package and is handled specially
 if(NOT APPLE AND NOT EMSCRIPTEN AND NOT TARGET ZLIB::ZLIB)
-    if(WIN32 OR (CMAKE_SYSTEM_NAME STREQUAL "Linux" AND CMAKE_CROSSCOMPILING))
+    if(WIN32 OR (CMAKE_SYSTEM_NAME STREQUAL "Linux" AND REALM_LINUX_TOOLCHAIN))
         realm_acquire_dependency(zlib ${DEP_ZLIB_VERSION} ZLIB_CMAKE_INCLUDE_FILE)
         include(${ZLIB_CMAKE_INCLUDE_FILE})
     elseif(ANDROID)

Jenkinsfile

@@ -261,7 +261,7 @@ def doCheckInDocker(Map options = [:]) {
             }
 
             if (options.useToolchain) {
-                cmakeDefinitions += " -DCMAKE_TOOLCHAIN_FILE=\"${env.WORKSPACE}/tools/cmake/x86_64.toolchain.cmake\""
+                cmakeDefinitions += " -DCMAKE_TOOLCHAIN_FILE=\"${env.WORKSPACE}/tools/cmake/x86_64-linux-gnu.toolchain.cmake\""
             }
 
             def buildSteps = { String dockerArgs = "" ->
@@ -388,7 +388,7 @@ def doBuildLinux(String buildType) {
                    rm -rf build-dir
                    mkdir build-dir
                    cd build-dir
-                   cmake -DCMAKE_BUILD_TYPE=${buildType} -DCMAKE_TOOLCHAIN_FILE=../tools/cmake/x86_64.toolchain.cmake -DREALM_NO_TESTS=1 -DREALM_VERSION="${gitDescribeVersion}" -G Ninja ..
+                   cmake -DCMAKE_BUILD_TYPE=${buildType} -DCMAKE_TOOLCHAIN_FILE=../tools/cmake/x86_64-linux-gnu.toolchain.cmake -DREALM_NO_TESTS=1 -DREALM_VERSION="${gitDescribeVersion}" -G Ninja ..
                    ninja
                    cpack -G TGZ
                 """

tools/cmake/RealmConfig.cmake.in

@@ -24,7 +24,7 @@ find_dependency(Threads)
 # so for an iOS build it'll use the path from the Device plaform, which is an error on Simulator.
 # Just use -lz and let Xcode figure it out
 if(TARGET Realm::Sync AND NOT APPLE AND NOT TARGET ZLIB::ZLIB)
-    if(WIN32 OR (CMAKE_SYSTEM_NAME STREQUAL "Linux" AND CMAKE_CROSSCOMPILING))
+    if(WIN32 OR (CMAKE_SYSTEM_NAME STREQUAL "Linux" AND REALM_LINUX_TOOLCHAIN))
         realm_acquire_dependency(zlib @DEP_ZLIB_VERSION@ ZLIB_CMAKE_INCLUDE_FILE)
         include(${ZLIB_CMAKE_INCLUDE_FILE})
     elseif(ANDROID)

tools/cmake/aarch64-linux-gnu.toolchain.cmake

@@ -0,0 +1,3 @@
+set(_TRIPLET "aarch64-unknown-linux-gnu")
+set(_TOOLCHAIN_MD5 a3a14d87f98904c2558b43bbd310f337)
+include("${CMAKE_CURRENT_LIST_DIR}/linux.toolchain.base.cmake")

tools/cmake/armv7-linux-gnueabihf.toolchain.cmake

@@ -0,0 +1,3 @@
+set(_TRIPLET "armv7-unknown-linux-gnueabihf")
+set(_TOOLCHAIN_MD5 fbf817b1428bb35c93be8e6c15f73d7d)
+include("${CMAKE_CURRENT_LIST_DIR}/linux.toolchain.base.cmake")

tools/cmake/aarch64.toolchain.cmake → tools/cmake/linux.toolchain.base.cmake

@@ -4,7 +4,7 @@ endif()
 
 set(_TRIPLET "aarch64-unknown-linux-gnu")
 file(DOWNLOAD https://static.realm.io/toolchains/v3/${_TRIPLET}.tar.zst ${CMAKE_BINARY_DIR}/${_TRIPLET}.tar.zst
-     EXPECTED_HASH MD5=a3a14d87f98904c2558b43bbd310f337 STATUS _DOWNLOAD_STATUS)
+     EXPECTED_HASH MD5=${_TOOLCHAIN_MD5} STATUS _DOWNLOAD_STATUS)
 list(GET _DOWNLOAD_STATUS 0 _DOWNLOAD_STATUS_CODE)
 if(NOT ${_DOWNLOAD_STATUS_CODE} EQUAL 0)
     message(FATAL_ERROR "Error downloading ${_TRIPLET}.tar.zst: ${_DOWNLOAD_STATUS}")
@@ -16,3 +16,5 @@ include("${CMAKE_BINARY_DIR}/${_TRIPLET}/toolchain.cmake")
 set(CMAKE_EXE_LINKER_FLAGS_INIT "-Xlinker --exclude-libs=libgcc.a,libstdc++.a -static-libgcc -static-libstdc++")
 set(CMAKE_SHARED_LINKER_FLAGS_INIT "-Xlinker --exclude-libs=libgcc.a,libstdc++.a -static-libgcc -static-libstdc++")
 set(CMAKE_MODULE_LINKER_FLAGS_INIT "-Xlinker --exclude-libs=libgcc.a,libstdc++.a -static-libgcc -static-libstdc++")
+
+set(REALM_LINUX_TOOLCHAIN ON)

tools/cmake/x86_64-linux-gnu.toolchain.cmake

@@ -0,0 +1,3 @@
+set(_TRIPLET "x86_64-unknown-linux-gnu")
+set(_TOOLCHAIN_MD5 aa99fc16d85adf1bb2f8b63b83542044)
+include("${CMAKE_CURRENT_LIST_DIR}/linux.toolchain.base.cmake")