Page History

...

See PR-1396, git commit #d32e9c38dfb0659a7f3c0cf586ba1584cd7eb3d6 in the main NuttX repository. See also the preceding commit, 6abd03d53ff9164fb17ea4aca701a49fbbf751c0.

Custom Boards Don't Need HOSTCC and HOSTCFLAGS Definitions

The NuttX build system uses several binary utilities that it compiles and runs on the host computer. To build these binaries, it needs to know the host C compiler and C flags. Previously, every board's scripts/Make.defs file had to provide this information via HOSTCC and HOSTCFLAGS Definitions. As part of an effort to simplify the build system, these definitions are now automatically provided by logic in tools/Config.mk. Boards included in the NuttX repository have been updated, but if you are building NuttX for a custom board, you may want to make the following changes:

...

See PR-1398, git commit #ee875b2a260cb4cc532b8ca303c2515e24c39b4e in the main NuttX repository.

Removal of Unused ARCHCCVERSION and ARCHCCMAJOR

The ARCHCCVERSION and ARCHCCMAJOR variables are unused. Historically they were defined in many boards' scripts/Make.defs. These were removed from all boards in the NuttX repository, but if you are building NuttX for a custom board, you may want to remove this unnecessary boilerplate.

...

Custom Boards May Not Need EXTRA_LIBS and EXTRA and EXTRA_LIBPATHS Definitions

The EXTRAThe EXTRA_LIBS and EXTRA and EXTRA_LIBPATHS make variables were previously defined in many boards' scripts/Make.defs files. These are now defined in a more central location: arch/*/src/*/Toolchain.defs. Your board's scripts/Make.defs usually includes this file. Boards included in NuttX have been updated, but if you are building NuttX for a custom board, you may need to update your board's scripts/Make.defs file to ensure you build with the correct definitions.

...

• If they are redundant to the definitions provided in the included arch/*/src/*/Toolchain.defs, remove these lines, or
• If they contain additional needed libraries and paths not present in arch/*/src/*/Toolchain.defs, remove any redundant definitions and change the assignment '=' to '+='.

See PR-1404, git commit #4910d43ab0fc360dbddb1f8a31db2a3ee383b46d in the main NuttX repository.

...