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Diffstat (limited to 'user/migration/v5-to-v6.rst')
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diff --git a/user/migration/v5-to-v6.rst b/user/migration/v5-to-v6.rst new file mode 100644 index 0000000..5997057 --- /dev/null +++ b/user/migration/v5-to-v6.rst @@ -0,0 +1,20 @@ +.. SPDX-License-Identifier: CC-BY-SA-4.0 + +.. Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de) + +.. _Migration_5_to_6: + +RTEMS 5 to RTEMS 6 +================== + +This section provides helpful information when migrating from RTEMS 5 to +RTEMS 6. + +Update to GCC 10 +---------------- + +The tool suite for RTEMS 6 uses GCC 10. GCC 10 enables ``-fno-common`` by +default. Code bases which never used this option before may observe now +multiple definition linker errors. For example, if global variables are +declared and defined in header files (usually a missing ``extern`` in the header +file). |