QuadTower:ctypes brett$ sudo /usr/bin/clang -E -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_gis_grass7/grass7/work/grass-7.8.2/lib/python/ctypes -I/opt/local/include "-DLL=" "-Drestrict=" "-D__attribute__(x)="  "-D_Nullable=" "-D_Nonnull=" "-D__compar="  "-Dint8_t=char" "-DCF_INLINE=" "-Duint16_t=short"      -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_gis_grass7/grass7/work/grass-7.8.2/dist.x86_64-apple-darwin17.7.0/include -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_gis_grass7/grass7/work/grass-7.8.2/dist.x86_64-apple-darwin17.7.0/include -D__GLIBC_HAVE_LONG_LONG -U __GNUC__ -dD -U __BLOCKS__ "-Dinline=" "-D__inline__=" "-D__extension__=" "-D_Bool=uint8_t" "-D__const=const" "-D__asm__(x)=" "-D__asm(x)=" "-DCTYPESGEN=1" "-D__uint16_t=uint16_t" "-D__uint32_t=uint32_t" "-D__uint64_t=uint64_t" "/tmp/tmpt6becje8.h" &>~/k.txt

QuadTower:ctypes brett$ /usr/bin/clang --version
Apple LLVM version 10.0.0 (clang-1000.11.45.5)
Target: x86_64-apple-darwin17.7.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin