> -----Original Message----- > From: [email protected] > <[email protected]> On Behalf Of Peter Kjellerstedt > via lists.openembedded.org > Sent: den 3 februari 2026 11:05 > To: [email protected]; [email protected] > Subject: Re: [oe] [meta-oe][PATCH] abseil-cpp: Set CMAKE_CXX_STANDARD to 17 > > > -----Original Message----- > > From: [email protected] > > <[email protected]> On Behalf Of Yogesh Tyagi via > > lists.openembedded.org > > Sent: den 2 februari 2026 20:17 > > To: [email protected] > > Cc: [email protected] > > Subject: [oe] [meta-oe][PATCH] abseil-cpp: Set CMAKE_CXX_STANDARD to 17 > > > > The compiler defaults to C++ < 17 which causes build failures. > > Abseil requires C++17 or higher, so explicitly set CMAKE_CXX_STANDARD=17 > > to ensure the build uses the correct C++ standard. > > > > Error: > > CMake Error at CMake/AbseilDll.cmake:745 (message): > > The compiler defaults to or is configured for C++ < 17. C++ >= 17 is > > required and Abseil and all libraries that use Abseil must use the same > > C++ > > language standard > > > > Signed-off-by: Yogesh Tyagi <[email protected]> > > --- > > meta-oe/recipes-devtools/abseil-cpp/abseil-cpp_20260107.0.bb | 1 + > > 1 file changed, 1 insertion(+) > > > > diff --git a/meta-oe/recipes-devtools/abseil-cpp/abseil-cpp_20260107.0.bb > > b/meta-oe/recipes-devtools/abseil-cpp/abseil-cpp_20260107.0.bb > > index e2bce0be11..d4475ee73a 100644 > > --- a/meta-oe/recipes-devtools/abseil-cpp/abseil-cpp_20260107.0.bb > > +++ b/meta-oe/recipes-devtools/abseil-cpp/abseil-cpp_20260107.0.bb > > @@ -21,6 +21,7 @@ inherit cmake > > EXTRA_OECMAKE = "-DBUILD_SHARED_LIBS=ON \ > > -DBUILD_TESTING=OFF \ > > -DABSL_ENABLE_INSTALL=ON \ > > + -DCMAKE_CXX_STANDARD=17 \ > > " > > # riscv32-yoe-linux-ld.lld: error: undefined reference: __atomic_store_8 > > # >>> referenced by > > <recipe-sysroot>/usr/lib/libabsl_flags_internal.so.2505.0.0 (disallowed by > > --no-allow-shlib-undefined) > > -- > > 2.34.1 > > I am not sure this is the correct thing to do. This means that for target, > you will now downgrade the C++ standard when building abseil. However, as > it says, all libraries that use abseil must use the same C++ standard. This > will thus no longer be the case, unless all users of abseil are also > modified to use C++17. > > I believe the error you are seeing comes from building abseil-native, i.e., > the native compiler you use uses an older C++ standard by default. But also > in this case, just changing it for abseil is probably not the right thing to > do. > > The correct solution, I believe, is to use a newer native compiler. This may > mean that you will have to use a buildtools tarball unless you can upgrade > your host system. > > //Peter
I note that this was integrated without any response to my concerns. //Peter
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