No SOURCES given to target: __CMAKE__CXX26 on ubuntu 25.04

Development
,
12

So I have to set for clang-20

if($ENV{CXX} MATCHES "clang" OR CMAKE_CXX_COMPILER MATCHES "clang")
    set(ENV{CXXFLAGS} -stdlib=libc++)
endif()

before project(...) in my CMakeLists.txt!

And for gcc-15 this workaround helps:

sudo mkdir -p /usr/lib/gcc/x86_64-linux-gnu/include/c++/15
cd /usr/lib/gcc/x86_64-linux-gnu/include/c++/15
sudo ln -s /usr/include/c++/15/bits .