#880 - Add support to build on arm.

CMakeLists.txt

@@ -116,6 +116,11 @@ target_link_libraries(cquery PRIVATE Threads::Threads)
 if(${CMAKE_SYSTEM_NAME} STREQUAL Linux)
   # loguru calls dladdr
   target_link_libraries(cquery PRIVATE ${CMAKE_DL_LIBS})
+  string(FIND ${CMAKE_HOST_SYSTEM_PROCESSOR} "armv7" result)
+
+  if(${result} GREATER -1)
+    target_link_libraries(cquery PRIVATE atomic)
+  endif()
 
 elseif(${CMAKE_SYSTEM_NAME} STREQUAL FreeBSD)
   # loguru::stacktrace_as_stdstring calls backtrace_symbols

clang_archive_hashes/clang+llvm-7.0.0-aarch64-linux-gnu.tar.xz.SHA256

@@ -0,0 +1 @@
+bd962b32818f8b07ae60e708f736eca5cd856f0d34ed9d1038cc9e0991390217

clang_archive_hashes/clang+llvm-7.0.0-armv7a-linux-gnueabihf.tar.xz.SHA256

@@ -0,0 +1 @@
+2d831636d54ff7a3225a3a52f05b8723110e71fa982de1fa55c9fed307ec8aca

cmake/DownloadAndExtractClang.cmake

@@ -27,6 +27,12 @@ if(${CMAKE_SYSTEM_NAME} STREQUAL Linux)
       set(CLANG_ARCHIVE_NAME 
           clang+llvm-${CLANG_VERSION}-x86_64-linux-gnu-ubuntu-16.04)
     endif()
+    message(STATUS "Host system processor: ${CMAKE_HOST_SYSTEM_PROCESSOR}")
+    if (${CMAKE_HOST_SYSTEM_PROCESSOR} STREQUAL "aarch64")
+      set(CLANG_ARCHIVE_NAME clang+llvm-${CLANG_VERSION}-aarch64-linux-gnu)
+    elseif (${CMAKE_HOST_SYSTEM_PROCESSOR} STREQUAL "armv7l")
+      set(CLANG_ARCHIVE_NAME clang+llvm-${CLANG_VERSION}-armv7a-linux-gnueabihf)
+    endif()
   endif()
 
 elseif(${CMAKE_SYSTEM_NAME} STREQUAL Darwin)
@@ -73,15 +79,19 @@ file an issue to get it added.")
 endif()
 
 # Download Clang archive
-message(STATUS "Downloading Clang ${CLANG_VERSION} (${CLANG_ARCHIVE_URL}) ...")
-file(DOWNLOAD ${CLANG_ARCHIVE_URL} ${CLANG_ARCHIVE_FILE}
-     STATUS CLANG_ARCHIVE_DOWNLOAD_RESULT)
-
-# Abort if download failed
-list(GET ${CLANG_ARCHIVE_DOWNLOAD_RESULT} 0 ERROR_CODE)
-if(${ERROR_CODE})
-  list(GET ${CLANG_ARCHIVE_DOWNLOAD_RESULT} 1 ERROR_STRING)
-  message(FATAL_ERROR ${ERROR_STRING})
+if (EXISTS ${CLANG_ARCHIVE_FILE})
+  message (STATUS "file exists, skipping download: ${CLANG_ARCHIVE_FILE}")
+else()
+  message(STATUS "Downloading Clang ${CLANG_VERSION} (${CLANG_ARCHIVE_URL}) ...")
+  file(DOWNLOAD ${CLANG_ARCHIVE_URL} ${CLANG_ARCHIVE_FILE}
+    STATUS CLANG_ARCHIVE_DOWNLOAD_RESULT)
+
+  # Abort if download failed
+  list(GET ${CLANG_ARCHIVE_DOWNLOAD_RESULT} 0 ERROR_CODE)
+  if(${ERROR_CODE})
+    list(GET ${CLANG_ARCHIVE_DOWNLOAD_RESULT} 1 ERROR_STRING)
+    message(FATAL_ERROR ${ERROR_STRING})
+  endif()
 endif()
 
 # Retrieve expected hash from file and strip newline

cquery.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+# with clang90
+# cmake .. -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX=debug -DCLANG_ROOT=$HOME/toolchains/clang90 -DSYSTEM_CLANG=ON  
+# export LD_LIBRARY_PATH=$HOME/toolchains/clang90/lib:$LD_LIBRARY_PATH
+# $HOME/SRC_jetson/cquery-kuba/build_clang90/debug/bin/cquery $@
+
+$HOME/SRC_jetson/cquery-kuba/build/cquery $@
+