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This commit extends support for the two-pass build. Its primary purpose is to incorporate source logic generated by applications into the kernel phase of the build.

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In the two pass build, the application logic is built during the first phase, pass 1.  In that phase, the application may generate and install source files in the pass1/directory.  The operating system is built during phase 2 of the build.  At that time, those source files in the pass1/ directory will be built and incorporated into the kernel address space.

The primary purpose of the pass1/ directory is to such application-generated kernel symbol tables.  For an example of the use of this feature, look at apps/examples/module/drivers/Makefile.  Kernel symbol tables are needed to support kernel modules.  Of course, addition board-specific logic in, say, configs/<board>/src would have to be included to make use of the application-installed symbol tables.
This commit is contained in:
Gregory Nutt
2018-08-07 08:31:00 -06:00
parent de5e633785
commit 4becaea8e3
10 changed files with 157 additions and 2 deletions
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tools/ProtectedLibs.mk
+8
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@@ -65,6 +65,14 @@ NUTTXLIBS += staging$(DELIM)libkmm$(LIBEXT) staging$(DELIM)libkarch$(LIBEXT)
USERLIBS += staging$(DELIM)libproxies$(LIBEXT) staging$(DELIM)libuc$(LIBEXT)
USERLIBS += staging$(DELIM)libumm$(LIBEXT) staging$(DELIM)libuarch$(LIBEXT)
# Add libraries for two pass build support. The special directory pass1
# may be populated so that application generated logic can be included into
# the kernel build
ifeq ($(CONFIG_BUILD_2PASS),y)
NUTTXLIBS += staging$(DELIM)libpass1$(LIBEXT)
endif
# Add libraries for C++ support. CXX, CXXFLAGS, and COMPILEXX must
# be defined in Make.defs for this to work!