Correct detection of the installed arm-none-eabi-gcc version during the first cmake run.

Author: Lebensgefahr

cmake/arm-none-eabi-checks.cmake

@@ -125,12 +125,23 @@ function(arm_none_eabi_gcc_check)
     if(NOT version)
         message("-- could not find ${prog}")
         arm_none_eabi_gcc_install()
+        gcc_get_version(version
+            TRIPLET ${arm_none_eabi_triplet}
+            PROGRAM_NAME prog
+            PROGRAM_PATH prog_path
+        )
         return()
     endif()
     message("-- found ${prog} ${version} at ${prog_path}")
     if(COMPILER_VERSION_CHECK AND NOT arm_none_eabi_gcc_version STREQUAL version)
         message("-- expecting ${prog} version ${arm_none_eabi_gcc_version}, but got version ${version} instead")
 	arm_none_eabi_gcc_install()
+        unset(gcc CACHE)
+        gcc_get_version(version
+            TRIPLET ${arm_none_eabi_triplet}
+            PROGRAM_NAME prog
+            PROGRAM_PATH prog_path
+        )
         return()
     endif()
 endfunction()