[Bug preprocessor/29612] New: gcc --save-temps does not give "multi-character character constant" error

[Bug preprocessor/29612] New: gcc --save-temps does not give "multi-character character constant" error

[ian at airs dot com]

When I compile this simple C file:

#include <stddef.h>
int main() {
  return '\1\2';
}

I get a warning:

foo.c:3:10: warning: multi-character character constant

When I compile the same file using --save-temps, I do not get a warning. 
Similarly, if I use -E to produce a preprocessed file, and compile that, I do
not get a warning.  This is a bug: options like --save-temps and -E should not
affect the set of warnings which are issued.

However ,I noticed that I do get a warning if I compile with --save-temps
-Wsystem-headers.

This appears to be a bug in libcpp: when a line directive indicates that it is
entering a system header file, it records the current state.  However, it
apparently does not restore the old state when it exits the system header file.
 The effect is that preprocessor warnings and errors are suppressed in a .i
file if a system header file is included.


-- 
           Summary: gcc --save-temps does not give "multi-character
                    character constant" error
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: preprocessor
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ian at airs dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29612

[Bug preprocessor/29612] gcc --save-temps does not give "multi-character character constant" error

[pinskia at gcc dot gnu dot org]

-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pinskia at gcc dot gnu dot
                   |                            |org
           Keywords|                            |diagnostic
      Known to work|                            |3.4.0
   Target Milestone|---                         |4.0.4


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29612

[Bug preprocessor/29612] [4.0/4.1/4.2/4.3 Regression] gcc --save-temps does not give "multi-character character constant" error

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2006-10-27 04:47 -------
Confirmed, a regression from 3.4.0 which warned:
earth:~>~/ia32_linux_gcc3_4/bin/gcc -W -Wall t.c -save-temps
t.c:3:10: warning: multi-character character constant


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
      Known to fail|                            |4.0.4 4.1.2 4.2.0 4.3.0
   Last reconfirmed|0000-00-00 00:00:00         |2006-10-27 04:47:37
               date|                            |
            Summary|gcc --save-temps does not   |[4.0/4.1/4.2/4.3 Regression]
                   |give "multi-character       |gcc --save-temps does not
                   |character constant" error   |give "multi-character
                   |                            |character constant" error


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29612

[Bug preprocessor/29612] [4.0/4.1/4.2/4.3 Regression] gcc --save-temps does not give "multi-character character constant" error

[jakub at gcc dot gnu dot org]

-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |jakub at gcc dot gnu dot org
                   |dot org                     |
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2006-10-27 04:47:37         |2006-11-08 11:02:29
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29612

[Bug preprocessor/29612] [4.0/4.1/4.2/4.3 Regression] gcc --save-temps does not give "multi-character character constant" error

[mmitchel at gcc dot gnu dot org]

-- 

mmitchel at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29612

[Bug preprocessor/29612] [4.0/4.1/4.2/4.3 Regression] gcc --save-temps does not give "multi-character character constant" error

[jakub at gcc dot gnu dot org]

------- Comment #2 from jakub at gcc dot gnu dot org  2006-12-29 08:15 -------
Subject: Bug 29612

Author: jakub
Date: Fri Dec 29 08:15:08 2006
New Revision: 120257

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=120257
Log:
        PR preprocessor/29612
        * directives.c (do_linemarker): Set pfile->buffer->sysp always, not
        only when new_sysp is non-zero.

        * gcc.dg/cpp/pr29612-1.c: New test.
        * gcc.dg/cpp/pr29612-2.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/cpp/pr29612-1.c
    trunk/gcc/testsuite/gcc.dg/cpp/pr29612-2.c
Modified:
    trunk/gcc/testsuite/ChangeLog
    trunk/libcpp/ChangeLog
    trunk/libcpp/directives.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29612

[Bug preprocessor/29612] [4.0/4.1/4.2/4.3 Regression] gcc --save-temps does not give "multi-character character constant" error

[jakub at gcc dot gnu dot org]

------- Comment #3 from jakub at gcc dot gnu dot org  2006-12-29 08:16 -------
Subject: Bug 29612

Author: jakub
Date: Fri Dec 29 08:16:32 2006
New Revision: 120258

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=120258
Log:
        PR preprocessor/29612
        * directives.c (do_linemarker): Set pfile->buffer->sysp always, not
        only when new_sysp is non-zero.

        * gcc.dg/cpp/pr29612-1.c: New test.
        * gcc.dg/cpp/pr29612-2.c: New test.

Added:
    branches/gcc-4_2-branch/gcc/testsuite/gcc.dg/cpp/pr29612-1.c
    branches/gcc-4_2-branch/gcc/testsuite/gcc.dg/cpp/pr29612-2.c
Modified:
    branches/gcc-4_2-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_2-branch/libcpp/ChangeLog
    branches/gcc-4_2-branch/libcpp/directives.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29612

[Bug preprocessor/29612] [4.0/4.1/4.2/4.3 Regression] gcc --save-temps does not give "multi-character character constant" error

[jakub at gcc dot gnu dot org]

------- Comment #4 from jakub at gcc dot gnu dot org  2006-12-29 08:17 -------
Subject: Bug 29612

Author: jakub
Date: Fri Dec 29 08:17:43 2006
New Revision: 120259

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=120259
Log:
        PR preprocessor/29612
        * directives.c (do_linemarker): Set pfile->buffer->sysp always, not
        only when new_sysp is non-zero.

        * gcc.dg/cpp/pr29612-1.c: New test.
        * gcc.dg/cpp/pr29612-2.c: New test.

Added:
    branches/gcc-4_1-branch/gcc/testsuite/gcc.dg/cpp/pr29612-1.c
    branches/gcc-4_1-branch/gcc/testsuite/gcc.dg/cpp/pr29612-2.c
Modified:
    branches/gcc-4_1-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_1-branch/libcpp/ChangeLog
    branches/gcc-4_1-branch/libcpp/directives.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29612

[Bug preprocessor/29612] [4.0 Regression] gcc --save-temps does not give "multi-character character constant" error

[jakub at gcc dot gnu dot org]

------- Comment #5 from jakub at gcc dot gnu dot org  2006-12-29 08:25 -------
Fixed in 4.3/4.2/4.1.


-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|4.0.4 4.1.2 4.2.0 4.3.0     |4.0.4 4.1.1
      Known to work|3.4.0                       |3.4.0 4.1.2 4.2.0 4.3.0
            Summary|[4.0/4.1/4.2/4.3 Regression]|[4.0 Regression] gcc --save-
                   |gcc --save-temps does not   |temps does not give "multi-
                   |give "multi-character       |character character
                   |character constant" error   |constant" error


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29612

[Bug preprocessor/29612] [4.0 Regression] gcc --save-temps does not give "multi-character character constant" error

[gdr at gcc dot gnu dot org]

------- Comment #6 from gdr at gcc dot gnu dot org  2007-02-03 20:45 -------
Fixed in GCC-4.1.2.


-- 

gdr at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|4.0.4                       |4.1.2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29612