Thanks So, first, I thought - as I had seen examples that I had to put these flags etc. in the configuration function but it appears that was a wrong thing. Now my recipe looks like: SUMMARY = "mylib" DESCRIPTION = "Fetch and build mylibi" LICENSE = "CLOSED" LIC_FILES_CHKSUM = ""
##EXTRA_OECMAKE = "all" inherit cmake python do_display_banner() { bb.plain("***********************************************"); bb.plain("* *"); bb.plain("* mylibrecipe created by mei *"); bb.plain("* *"); bb.plain("***********************************************"); } addtask display_banner before do_build # where and how to get source ## this is via git SRC_URI = "git://git@correct git - this works;" # where to source is stored S = "${WORKDIR}/git" ## was using target flags but Mikko suggested EXTRA_OECMAKE which at least doesnt complain ##TARGET_CFLAGS += "-DBUILD_PYTHON_BINDINGS=ON -DBUILD_SHARED=ON -DBUILD_TOOLS=ON" ##TARGET_CXXFLAGS += "-DBUILD_PYTHON_BINDINGS=ON -DBUILD_SHARED=ON -DBUILD_TOOLS=ON" EXTRA_OECMAKE += "-DBUILD_PYTHON_BINDINGS=ON -DBUILD_SHARED=ON -DBUILD_TOOLS=ON" ## this I think is needed to ensure the correct compilers are used... I think anyway. export CXX="/usr/bin/arm-none-gnueabi-g++" export CMAKE_CXX_COMPILER="/usr/bin/arm-none-gnueabi-g++" However: | DEBUG: Python function extend_recipe_sysroot finished | DEBUG: Executing shell function do_configure | -- The CXX compiler identification is GNU 9.4.0 | -- The C compiler identification is GNU 9.4.0 | -- Detecting CXX compiler ABI info | -- Detecting CXX compiler ABI info - failed | -- Check for working CXX compiler: /usr/bin/g++ | -- Check for working CXX compiler: /usr/bin/g++ - broken | CMake Error at /home/dave/Documents/Kymati/yocto/build/tmp/work/cortexa53-crypto-phytec-linux/libkymati/1.0-r0/recipe-sysroot-native/usr/share/cmake-3.19/Modules/CMakeTestCXXCompiler.cmake:59 (message): | The C++ compiler | | "/usr/bin/g++" | | is not able to compile a simple test program. | suggesting it is not using the c++ I thought it should be. ________________________________ From: Mikko Rapeli <mikko.rap...@linaro.org> Sent: 17 October 2023 11:52 To: Dave Hitchman <dave.hitch...@kymati.com> Cc: yocto@lists.yoctoproject.org <yocto@lists.yoctoproject.org> Subject: Re: [yocto] Using cmake... how? Hi, On Tue, Oct 17, 2023 at 09:21:27AM +0000, Dave Hitchman wrote: > Oh I dont know. This is getting to be a bit annoying. > I had already included the inherit cmake line but now it seems maybe that you > dont need to put any cmake commands in... not 100% sure, no one seems to > explain this, I am not convinced. > However I want some extra flags and I have read that you should be able to: > TARGET_CFLAGS += "-DBUILD_PYTHON_BINDINGS=ON -DBUILD_SHARED=ON > -DBUILD_TOOLS=ON" Don't put these into CFLAGS. I presume you want to give these to CMake via EXTRA_OECMAKE variable to be used at do_configure time. Check poky tree for documentation and examples, docs are also here: https://docs.yoctoproject.org/dev/singleindex.html#cmake > but building that gives me > + cd > /home/dave/Documents/Kymati/yocto/build/tmp/work/cortexa53-crypto-phytec-linux/libkymati/1.0-r0/build > + do_configure > + cd > /home/dave/Documents/Kymati/yocto/build/tmp/work/cortexa53-crypto-phytec-linux/libkymati/1.0-r0/git > + TARGET_CFLAGS:=-DBUILD_PYTHON_BINDINGS=ON -DBUILD_SHARED=ON -DBUILD_TOOLS=ON > > /home/dave/Documents/Kymati/yocto/build/tmp/work/cortexa53-crypto-phytec-linux/libkymati/1.0-r0/temp/run.do_configure.991537: > 159: TARGET_CFLAGS:=-DBUILD_PYTHON_BINDINGS=ON -DBUILD_SHARED=ON > -DBUILD_TOOLS=ON: not found > > Is there a good, really works, actually sets extra flags, really shows and > explains with comments and everything example I can look at? This bitbake is > clearly clever, so is cmake, but in honesty I really gave up trying to > understand any of it and just want it to work, writing the code is one thing > but these build systems are a fight all of their own that takes longer than > the code to solve the universe Build systems are hard. I'm sure someone will invent another one to solve all issues and resurrect all old ones. :) Cheers, -Mikko
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