https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65387
Bug ID: 65387
Summary: cpp -C emits extraneous comment header on every file
Product: gcc
Version: 4.9.2
Status: UNCONFIRMED
Severity: trivial
Priority: P3
Component: preprocessor
Assignee: unassigned at gcc dot gnu.org
Reporter: bugs at stellardeath dot org
cpp is often (mis)used for non-C files, many Fortran projects for example
prefer to run a separate preprocessor step by invoking cpp by hand instead of
relying on the built-in preprocessing of the fortran compiler (don't ask why -
I don't understand it either).
In order not to mess up anything in the non-C file, cpp is usually invoked as
cpp -C -P -traditional
The "-C" flag started to make problems in recent versions(?), as this now emits
a large comment header on every file:
#> echo "asd" | cpp -C -P
/* Copyright (C) 1991-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
/* This header is separate from features.h so that the compiler can
include it implicitly at the start of every compilation. It must
not itself include <features.h> or any other header that includes
<features.h> because the implicit include comes before any feature
test macros that may be defined in a source file before it first
explicitly includes a system header. GCC knows the name of this
header in order to preinclude it. */
/* glibc's intent is to support the IEC 559 math functionality, real
and complex. If the GCC (4.9 and later) predefined macros
specifying compiler intent are available, use them to determine
whether the overall intent is to support these features; otherwise,
presume an older compiler has intent to support these features and
define these macros by default. */
/* wchar_t uses ISO/IEC 10646 (2nd ed., published 2011-03-15) /
Unicode 6.0. */
/* We do not support C11 <threads.h>. */
asd
Would it be too much trouble to not include this extraneous header?
Kind regards,
Lorenz
