Recent versions of Qt have apparently added sufficient numbers of
headers that the command lines used to spawn a custom header-
parsing tool, started overflowing Windows' maximum command-line
length.
This change restructures the mechanism to use a GCC-style command-
line arguments file rather than passing filenames all directly
in the argv[] vector.
Although QNX is the usual ELF target whose cross-build is supported
on Windows, the mechanics introduced in this patch happen to affect
all other ELF Unix systems' builds too.
Change-Id: I5a7383cf9f2ebf9dffde8dbfdcdeca888265e085
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
6f1b78c980