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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