[Bug libmudflap/14588] New: -fmudflap doesn't define MREMAP_MAYMOVE

[Bug libmudflap/14588] New: -fmudflap doesn't define MREMAP_MAYMOVE

[wcohen at redhat dot com]

Have the following example code:

/* replicate problem observed in
   oprofiles libdb/db_manage.c
   gcc-ssa  -fmudflap -c mudflapx.c
*/
 
#define _GNU_SOURCE
 
#include <unistd.h>
#include <sys/mman.h>
 
 
void *odb_hash_add_node(void *old_address, size_t old_file_size,
                        size_t new_file_size)
{
        void *new_map;
 
        new_map = mremap(old_address, old_file_size, new_file_size, MREMAP_MAYMOVE);
        return new_map;
}


On Red Hat Linux 9 and RHEL 3 the current FSF tree-ssa compiler
(tree-ssa-20020619-branch checked out 2004-03-15) it compiles successfully
without the "-fmudflap", but it fails when compiled with the the "-lmudflap" option:

/home/wcohen/gcc/tree-ssa-20020619-branch/inst/bin/gcc mudflapx.c -fmudflap -c
mudflapx.c: In function `odb_hash_add_node':
mudflapx.c:17: error: `MREMAP_MAYMOVE' undeclared (first use in this function)
mudflapx.c:17: error: (Each undeclared identifier is reported only once
mudflapx.c:17: error: for each function it appears in.)

-- 
           Summary: -fmudflap doesn't define MREMAP_MAYMOVE
           Product: gcc
           Version: tree-ssa
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libmudflap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: wcohen at redhat dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14588

[Bug libmudflap/14588] -fmudflap doesn't define MREMAP_MAYMOVE

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |minor
   Target Milestone|---                         |tree-ssa


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14588

[Bug libmudflap/14588] -fmudflap doesn't define MREMAP_MAYMOVE

[fche at redhat dot com]

------- Additional Comments From fche at redhat dot com  2004-03-16 21:29 -------
mudflap does not intend to interfere with the definition of macro constants
such as this linux-specific one that comes from */mman.h.  Could you
provide a preprocessed version of your source file?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14588

[Bug libmudflap/14588] -fmudflap doesn't define MREMAP_MAYMOVE

[wcohen at redhat dot com]

------- Additional Comments From wcohen at redhat dot com  2004-03-23 16:23 -------
Created an attachment (id=5980)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=5980&action=view)
preprocessed version of problem file.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14588

[Bug libmudflap/14588] -fmudflap doesn't define MREMAP_MAYMOVE

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-04-04 07:30 -------
The problem is that -fmudflap includes some header files before the main source, to do 
the right thing, use the -D option like so -D_GNU_SOURCE and that will fix the issue. 

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14588