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[Bug c++/23139] [3.4/4.0/4.1 Regression] -pedantic -ffast-math breaks working code
- From: "mmitchel at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 6 Sep 2005 15:29:36 -0000
- Subject: [Bug c++/23139] [3.4/4.0/4.1 Regression] -pedantic -ffast-math breaks working code
- References: <20050729205340.23139.thor@math.tu-berlin.de>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From mmitchel at gcc dot gnu dot org 2005-09-06 15:29 -------
The problem behind both diagnostics fact that the C++ front-end pre-lexes the
entire source file. As a result, the lexing routines, which depends on the
setting of pedantic to determine whether or not to issue errors, are called when
pedantic is set, even though we are within an __extension__ block. Because the
parsing of __extension__ blocks is complex, we need to either (a) eliminate the
up-front lexing, or (b) defer issuing diagnostics until we are actually in
position to know the correct value of pedantic.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23139