build: Bump minimum supported GCC to g++-9

Also, update the code to use constexpr, which does not work in g++-8.

Also, drop the no longer needed build-aux/m4/l_filesystem.m4.
This commit is contained in:
MarcoFalke
2023-05-15 15:03:30 +02:00
parent fa69955e74
commit fa953f15bf
6 changed files with 5 additions and 47 deletions

View File

@ -115,9 +115,6 @@ else
AX_CXX_COMPILE_STDCXX([20], [noext], [mandatory])
fi
dnl check if additional link flags are required for std::filesystem
CHECK_FILESYSTEM
dnl Unless the user specified OBJCXX, force it to be the same as CXX. This ensures
dnl that we get the same -std flags for both.
m4_ifdef([AC_PROG_OBJCXX],[