user/sven/linux.git/tools/build, branch v4.9.243

tools: build: Use HOSTLDFLAGS with fixdep

2018-08-24T11:12:39Z

[ Upstream commit 8b247a92ebd0cda7dec49a6f771d9c4950f3d3ad ] The final link of fixdep uses LDFLAGS but not the existing HOSTLDFLAGS. Fix this. Signed-off-by: Laura Abbott Acked-by: Jiri Olsa Signed-off-by: Masahiro Yamada Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

tools build: fix # escaping in .cmd files for future Make

2018-07-17T09:37:53Z

commit 9feeb638cde083c737e295c0547f1b4f28e99583 upstream. In 2016 GNU Make made a backwards incompatible change to the way '#' characters were handled in Makefiles when used inside functions or macros: http://git.savannah.gnu.org/cgit/make.git/commit/?id=c6966b323811c37acedff05b57 Due to this change, when attempting to run `make prepare' I get a spurious make syntax error: /home/earnest/linux/tools/objtool/.fixdep.o.cmd:1: *** missing separator. Stop. When inspecting `.fixdep.o.cmd' it includes two lines which use unescaped comment characters at the top: \# cannot find fixdep (/home/earnest/linux/tools/objtool//fixdep) \# using basic dep data This is because `tools/build/Build.include' prints these '\#' characters: printf '\# cannot find fixdep (%s)\n' $(fixdep) > $(dot-target).cmd; \ printf '\# using basic dep data\n\n' >> $(dot-target).cmd; \ This completes commit 9564a8cf422d ("Kbuild: fix # escaping in .cmd files for future Make"). Link: https://bugzilla.kernel.org/show_bug.cgi?id=197847 Cc: Randy Dunlap Cc: Rasmus Villemoes Cc: stable@vger.kernel.org Signed-off-by: Paul Menzel Signed-off-by: Masahiro Yamada Signed-off-by: Greg Kroah-Hartman

Kbuild: fix # escaping in .cmd files for future Make

2018-07-11T14:26:45Z

commit 9564a8cf422d7b58f6e857e3546d346fa970191e upstream. I tried building using a freshly built Make (4.2.1-69-g8a731d1), but already the objtool build broke with orc_dump.c: In function ‘orc_dump’: orc_dump.c:106:2: error: ‘elf_getshnum’ is deprecated [-Werror=deprecated-declarations] if (elf_getshdrnum(elf, &nr_sections)) { Turns out that with that new Make, the backslash was not removed, so cpp didn't see a #include directive, grep found nothing, and -DLIBELF_USE_DEPRECATED was wrongly put in CFLAGS. Now, that new Make behaviour is documented in their NEWS file: * WARNING: Backward-incompatibility! Number signs (#) appearing inside a macro reference or function invocation no longer introduce comments and should not be escaped with backslashes: thus a call such as: foo := $(shell echo '#') is legal. Previously the number sign needed to be escaped, for example: foo := $(shell echo '\#') Now this latter will resolve to "\#". If you want to write makefiles portable to both versions, assign the number sign to a variable: C := \# foo := $(shell echo '$C') This was claimed to be fixed in 3.81, but wasn't, for some reason. To detect this change search for 'nocomment' in the .FEATURES variable. This also fixes up the two make-cmd instances to replace # with $(pound) rather than with \#. There might very well be other places that need similar fixup in preparation for whatever future Make release contains the above change, but at least this builds an x86_64 defconfig with the new make. Link: https://bugzilla.kernel.org/show_bug.cgi?id=197847 Cc: Randy Dunlap Signed-off-by: Rasmus Villemoes Signed-off-by: Masahiro Yamada Signed-off-by: Greg Kroah-Hartman

tools build: Add tools tree support for 'make -s'

2018-02-25T10:05:52Z

commit e572d0887137acfc53f18175522964ec19d88175 upstream. When doing a kernel build with 'make -s', everything is silenced except the objtool build. That's because the tools tree support for silent builds is some combination of missing and broken. Three changes are needed to fix it: - Makefile: propagate '-s' to the sub-make's MAKEFLAGS variable so the tools Makefiles can see it. - tools/scripts/Makefile.include: fix the tools Makefiles' ability to recognize '-s'. The MAKE_VERSION and MAKEFLAGS checks are copied from the top-level Makefile. This silences the "DESCEND objtool" message. - tools/build/Makefile.build: add support to the tools Build files for recognizing '-s'. Again the MAKE_VERSION and MAKEFLAGS checks are copied from the top-level Makefile. This silences all the object compile/link messages. Reported-and-Tested-by: Peter Zijlstra Signed-off-by: Josh Poimboeuf Cc: Jiri Olsa Cc: Michal Marek Link: http://lkml.kernel.org/r/e8967562ef640c3ae9a76da4ae0f4e47df737c34.1484799200.git.jpoimboe@redhat.com Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Greg Kroah-Hartman

tools build: Add feature detection for g++

2016-10-05T22:59:35Z

Check if g++ is available. The result will be used by builtin clang and LLVM support. Since LLVM requires C++11, this feature detector checks std::move(). Signed-off-by: Wang Nan Cc: Alexei Starovoitov Cc: He Kuang Cc: Jiri Olsa Cc: Zefan Li Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1474874832-134786-3-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo

tools build: Support compiling C++ source file

2016-10-05T22:58:51Z

Add new rule to compile .cpp file to .o use g++. C++ support is required for built-in clang and LLVM support. Linker side support will be introduced by following commits. Signed-off-by: Wang Nan Cc: Alexei Starovoitov Cc: He Kuang Cc: Jiri Olsa Cc: Zefan Li Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1474874832-134786-2-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo

tools build: Make fixdep a hostprog

2016-10-03T14:40:35Z

It is used in the build process, so stop suppressing its build in tools cross builds. Signed-off-by: Jiri Olsa Tested-by: Arnaldo Carvalho de Melo Cc: Andi Kleen Cc: Madhavan Srinivasan Cc: Peter Zijlstra Cc: Sukadev Bhattiprolu Cc: linuxppc-dev@lists.ozlabs.org Link: http://lkml.kernel.org/r/20160927141846.GA6589@krava [ Use HOSTCC on the $(OUTPUT)fixdep target, it was using the x-compiler to link fixdep-in.o, that was correctly built with HOSTCC and thus failing ] Signed-off-by: Arnaldo Carvalho de Melo

tools build: Add support for host programs format

2016-10-03T14:39:09Z

In some cases, like for fixdep and shortly for jevents, we need to build a tool to run on the host that will be used in building a tool, such as perf, that is being cross compiled, so do like the kernel and provide HOSTCC, HOSTLD and HOSTAR to do that. Signed-off-by: Jiri Olsa Requested-by: Andi Kleen Requested-and-Tested-by: Arnaldo Carvalho de Melo Cc: Madhavan Srinivasan Cc: Peter Zijlstra Cc: Sukadev Bhattiprolu Cc: linuxppc-dev@lists.ozlabs.org Link: http://lkml.kernel.org/r/20160927141846.GA6589@krava Signed-off-by: Arnaldo Carvalho de Melo

perf build: Add sdt feature detection

2016-07-14T02:09:09Z

This checks whether sys/sdt.h is available or not, which is required for DTRACE_PROBE(). We can disable this feature by passing NO_SDT=1 when building. This flag will be used for SDT test case and further SDT events in perftools. Signed-off-by: Masami Hiramatsu Cc: Ananth N Mavinakayanahalli Cc: Brendan Gregg Cc: Hemant Kumar Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/146831795615.17065.17513820540591053933.stgit@devbox Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Add feature detection for gelf_getnote()

2016-07-12T18:20:41Z

That is not present on some libelf implementations, such as the one used in Alpine Linux: libelf-0.8.13. This ends up disabling the SDT code, that relies on this function. One alternative would be to provide an weak fallback implementation or the open coded variant used by the buildid sysfs notes reading code. Cc: Adrian Hunter Cc: Ananth N Mavinakayanahalli Cc: Brendan Gregg Cc: David Ahern Cc: Hemant Kumar Cc: Jiri Olsa Cc: Masami Hiramatsu Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-82lh22ybedy9b9lych8xj12g@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo