--- configure.orig 2018-04-01 16:42:52.206302000 +0200 +++ configure 2018-04-01 16:45:42.802072000 +0200 @@ -23534,7 +23534,6 @@ - p # When compiling with GCC, prefer -isystem to -I when including system # include files, to avoid generating useless diagnostics for the files. ISYSTEM='-isystem '