2018-08-07 22:30:17 +08:00
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README
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======
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This directory provides support for the two-pass build. Its primary
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purpose is to incorporate source logic generated by applications into the
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kernel phase of the build.
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In the two pass build, the application logic is built during the first
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phase, pass 1. In that phase, the application may generate and install
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2019-03-18 03:42:44 +08:00
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source files into the pass1/ directory.
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2018-08-07 22:30:17 +08:00
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The operating system is built during phase 2 of the build. At that time,
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those source files in the pass1/ directory will be built and incorporated
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into the kernel address space.
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The primary purpose of the pass1/ directory is to such application-
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generated kernel symbol tables. For an example of the use of this
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feature, look at apps/examples/module/drivers/Makefile. Kernel symbol
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tables are needed to support kernel modules.
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Of course, addition board-specific logic in, say, configs/<board>/src
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would have to be included to make use of the application-installed symbol
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tables.
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