From cf6c53db9525a7f6c5052ccd84a0638128f14632 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Fri, 8 Aug 2014 17:23:09 +0200 Subject: Documentation: kbuild: Remove obsolete dtc_cpp section 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 Signed-off-by: Michal Marek --- Documentation/kbuild/makefiles.txt | 23 ----------------------- 1 file changed, 23 deletions(-) (limited to 'Documentation/kbuild') diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt index 520b2c75bc56..eda00a1073a7 100644 --- a/Documentation/kbuild/makefiles.txt +++ b/Documentation/kbuild/makefiles.txt @@ -1163,29 +1163,6 @@ 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 -- cgit v1.2.3-58-ga151