I suspect because it is an unusual case and doesn't get as much attention as the native gcc code. That is compounded by the need to "compute like an ARM" for the constants, leading to some emulation.
But the worst part is those damned autoconf scripts. They very cleverly probe the attributes of your x86 by compiling and running code during the build process and then make decisions about how the code should run on your ARM. They are a never ending sink of human effort. Best to just build on a machine where they will get the right answer without you fiddling with them.
But the worst part is those damned autoconf scripts. They very cleverly probe the attributes of your x86 by compiling and running code during the build process and then make decisions about how the code should run on your ARM. They are a never ending sink of human effort. Best to just build on a machine where they will get the right answer without you fiddling with them.