We should probably take care of files that begin with a byte order mark (BOM;
see http://en.wikipedia.org/wiki/Byte_Order_Mark) because some editors (like
windows notepad) use them. We currently say:
$ xxd bom.f
0000000: fffe 2020 2020 2020 7072 696e 7420 2a2c .. print *,
0000010: 2022 4865 6c6c 6f20 776f 726c 6422 0a20 "Hello world".
0000020: 2020 2020 2065 6e64 end
$ gfortran bom.f
bom.f:1.1:
\xFF\xFE print *, "Hello world"
1
Error: Non-numeric character in statement label at (1)
bom.f:1.2:
\xFF\xFE print *, "Hello world"
1
Error: Invalid character in name at (1)
--
Summary: Error on reading Byte Order Mark
Product: gcc
Version: 4.3.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: fxcoudert at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31645
