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user: Clarify -fno-common changes

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Sebastian Huber 2022-09-12 09:01:12 +02:00
parent 13be9a2b28
commit 283acbbfdd
1 changed files with 7 additions and 7 deletions
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user/migration/v5-to-v6.rst
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@ -10,14 +10,14 @@ RTEMS 5 to RTEMS 6
This section provides helpful information when migrating from RTEMS 5 to This section provides helpful information when migrating from RTEMS 5 to
RTEMS 6. RTEMS 6.
Update to GCC 10 Update to GCC 10 and Later
---------------- --------------------------
The tool suite for RTEMS 6 uses GCC 10. GCC 10 enables ``-fno-common`` by The tool suite for RTEMS 6 uses at least GCC 10. GCC 10 and later enable
default. Code bases which never used this option before may observe now ``-fno-common`` by default. Code bases which never used this option before may
multiple definition linker errors. For example, if global variables are observe now multiple definition linker errors. For example, if global
declared and defined in header files (usually a missing ``extern`` in the header variables are declared and defined in header files (usually a missing
file). ``extern`` in the header file).
Replacements for Removed APIs Replacements for Removed APIs
----------------------------- -----------------------------