r186738 - in /branches/google/gcc-4_7: ./ gcc/C...

[aaw at gcc dot gnu dot org]

Author: aaw
Date: Tue Apr 24 02:10:49 2012
New Revision: 186738

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=186738
Log:
Merged revision 186736 from google/main.

Add new option, -Wliteral-suffix.

This option, which is enabled by default, causes the preprocessor to warn
when a string or character literal is followed by a ud-suffix which does
not begin with an underscore.  According to [lex.ext]p10, this is
ill-formed.

Also modifies the preprocessor to treat such ill-formed suffixes as separate
preprocessing tokens.  This is consistent with the Clang front end (see
http://llvm.org/viewvc/llvm-project?view=rev&revision=152287), and enables
backwards compatibility with code that uses formatting macros from
<inttypes.h>, as in the following code block:

  int main() {
    int64_t i64 = 123;
    printf("My int64: %"PRId64"\n", i64);
  }

Google ref b/6377711.

2012-04-23   Ollie Wild  <aaw@google.com>

	* gcc/c-family/c-common.c: Add CPP_W_LITERAL_SUFFIX mapping.
	* gcc/c-family/c-opts.c (c_common_handle_option): Handle
	OPT_Wliteral_suffix.
	* gcc/c-family/c.opt: Add Wliteral-suffix.
	* gcc/doc/invoke.texi (Wliteral-suffix): Document new option.
	* gcc/testsuite/g++.dg/cpp0x/Wliteral-suffix.c: New test.
	* libcpp/include/cpplib.h (struct cpp_options): Add new field,
	warn_literal_suffix.
	(CPP_W_LITERAL_SUFFIX): New enum.
	* libcpp/init.c (cpp_create_reader): Default initialization of
	warn_literal_suffix.
	* libcpp/lex.c (lex_raw_string): Treat user-defined literals which
	don't begin with '_' as separate tokens and produce a warning.
	(lex_string): Ditto.

Added:
    branches/google/gcc-4_7/gcc/testsuite/g++.dg/cpp0x/Wliteral-suffix.C
      - copied unchanged from r186736, branches/google/main/gcc/testsuite/g++.dg/cpp0x/Wliteral-suffix.C
    branches/google/gcc-4_7/libcpp/ChangeLog.google-integration
      - copied unchanged from r186736, branches/google/main/libcpp/ChangeLog.google-integration
Modified:
    branches/google/gcc-4_7/   (props changed)
    branches/google/gcc-4_7/gcc/ChangeLog.google-integration
    branches/google/gcc-4_7/gcc/c-family/c-common.c
    branches/google/gcc-4_7/gcc/c-family/c-opts.c
    branches/google/gcc-4_7/gcc/c-family/c.opt
    branches/google/gcc-4_7/gcc/doc/invoke.texi
    branches/google/gcc-4_7/gcc/testsuite/gcc.target/powerpc/ppc-round.c   (props changed)
    branches/google/gcc-4_7/libcpp/include/cpplib.h
    branches/google/gcc-4_7/libcpp/init.c
    branches/google/gcc-4_7/libcpp/lex.c
    branches/google/gcc-4_7/libjava/classpath/   (props changed)

Propchange: branches/google/gcc-4_7/
            ('svn:mergeinfo' modified)

Propchange: branches/google/gcc-4_7/gcc/testsuite/gcc.target/powerpc/ppc-round.c
            ('svn:mergeinfo' modified)

Propchange: branches/google/gcc-4_7/libjava/classpath/
            ('svn:mergeinfo' modified)