[PATCH 3/4] Documentation: kbuild: Remove obsolete dtc_cpp section

Geert Uytterhoeven
2014-08-08T15:23:33Z

Commit b40b25fff8205dd18124d8fc87b2c9c57f269b5f ("kbuild: always
run gcc -E on *.dts, remove cmd_dtc_cpp") improved the functionality of
cmd_dtc_cpp and merged it back into cmd_dtc.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
---
Documentation/kbuild/makefiles.txt | 23 -----------------------
1 file changed, 23 deletions(-)

diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
index 1c6056f1b95f..4275a719f45f 100644
--- a/Documentation/kbuild/makefiles.txt
+++ b/Documentation/kbuild/makefiles.txt
@@ -1186,29 +1186,6 @@ When kbuild executes, the following steps are followed (roughly):
clean-files += *.dtb
DTC_FLAGS ?= -p 1024

- dtc_cpp
- This is just like dtc as describe above, except that the C pre-
- processor is invoked upon the .dtsp file before compiling the result
- with dtc.
-
- In order for build dependencies to work, all files compiled using
- dtc_cpp must use the C pre-processor's #include functionality and not
- dtc's /include/ functionality.
-
- Using the C pre-processor allows use of #define to create named
- constants. In turn, the #defines will typically appear in a header
- file, which may be shared with regular C code. Since the dtc language
- represents a data structure rather than code in C syntax, similar
- restrictions are placed on a header file included by a device tree
- file as for a header file included by an assembly language file.
- In particular, the C pre-processor is passed -x assembler-with-cpp,
- which sets macro __ASSEMBLY__. __DTS__ is also set. These allow header
- files to restrict their content to that compatible with device tree
- source.
-
- A central rule exists to create $(obj)/%.dtb from $(src)/%.dtsp;
- architecture Makefiles do no need to explicitly write out that rule.
-
--- 6.8 Custom kbuild commands

When kbuild is executing with KBUILD_VERBOSE=0, then only a shorthand
--
1.9.1