>>177,182
たぶん自己レス
clangはオーバーキルなのでAndroid NDKのndk-sysrootで良かった

Package: ndk-sysroot
Version: 27b
Maintainer: @termux
Installed-Size: 21.1 MB
Conflicts: libutil-dev, libgcc, libandroid-support-dev
Replaces: libutil-dev, libgcc, libandroid-support-dev, ndk-stl
Homepage: https://developer.android.com/tools/sdk/ndk/index.html
Download-Size: 1737 kB
APT-Sources: https://linux.domainesia.com/applications/termux/termux-main stable/main aarch64 Packages
Description: System header and library files from the Android NDK needed for compiling C programs