Merge pull request #27 from vpetrigo/arm-gcc-cleanup

Update arm-gcc-toolchain.cmake

arm-gcc-toolchain.cmake

@@ -1,26 +1,8 @@
-set(CMAKE_SYSTEM_NAME Linux)
+set(CMAKE_SYSTEM_NAME Generic)
 set(CMAKE_SYSTEM_PROCESSOR ARM)
 
-if (MINGW OR CYGWIN OR WIN32)
- set(UTIL_SEARCH_CMD where)
-elseif (UNIX OR APPLE)
- set(UTIL_SEARCH_CMD which)
-endif ()
-
 set(TOOLCHAIN_PREFIX arm-none-eabi-)
-
-execute_process(
- COMMAND ${UTIL_SEARCH_CMD} ${TOOLCHAIN_PREFIX}gcc
- OUTPUT_VARIABLE BINUTILS_PATH
- OUTPUT_STRIP_TRAILING_WHITESPACE
-)
-
-if (MINGW OR CYGWIN OR WIN32)
- if (BINUTILS_PATH)
- string(REPLACE "\n" ";" BINUTILS_PATH "${BINUTILS_PATH}")
- list(GET BINUTILS_PATH 0 BINUTILS_PATH)
- endif ()
-endif ()
+find_program(BINUTILS_PATH ${TOOLCHAIN_PREFIX}gcc NO_CACHE)
 
 if (NOT BINUTILS_PATH)
  message(FATAL_ERROR "ARM GCC toolchain not found")
@@ -40,6 +22,9 @@ set(CMAKE_CXX_COMPILER ${TOOLCHAIN_PREFIX}g++)
 set(CMAKE_AR ${TOOLCHAIN_PREFIX}gcc-ar)
 set(CMAKE_RANLIB ${TOOLCHAIN_PREFIX}gcc-ranlib)
 
+execute_process(COMMAND ${CMAKE_C_COMPILER} -print-sysroot
+ OUTPUT_VARIABLE ARM_GCC_SYSROOT OUTPUT_STRIP_TRAILING_WHITESPACE)
+
 # Default C compiler flags
 set(CMAKE_C_FLAGS_DEBUG_INIT "-g3 -Og -Wall -pedantic -DDEBUG")
 set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG_INIT}" CACHE STRING "" FORCE)
@@ -62,7 +47,7 @@ set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO_INIT}" CACH
 set(CMAKE_OBJCOPY ${ARM_TOOLCHAIN_DIR}/${TOOLCHAIN_PREFIX}objcopy CACHE INTERNAL "objcopy tool")
 set(CMAKE_SIZE_UTIL ${ARM_TOOLCHAIN_DIR}/${TOOLCHAIN_PREFIX}size CACHE INTERNAL "size tool")
 
-set(CMAKE_SYSROOT ${ARM_TOOLCHAIN_DIR}/../arm-none-eabi)
+set(CMAKE_SYSROOT ${ARM_GCC_SYSROOT})
 set(CMAKE_FIND_ROOT_PATH ${BINUTILS_PATH})
 set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
 set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)