[Bug build/18294] New: gdb compilation fails on 32-bit Solaris: largefile vs. procfs

["ro at TechFak dot Uni-Bielefeld.DE" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=18294

            Bug ID: 18294
           Summary: gdb compilation fails on 32-bit Solaris: largefile vs.
                    procfs
           Product: gdb
           Version: 7.9
            Status: NEW
          Severity: normal
          Priority: P2
         Component: build
          Assignee: unassigned at sourceware dot org
          Reporter: ro at TechFak dot Uni-Bielefeld.DE
              Host: i?86-*-solaris2*, sparc-sun-solaris2*
            Target: i?86-*-solaris2*, sparc-sun-solaris2*

Contrary to gdb 7.8, 7.9 fails to compile on 32-bit Solaris:

gcc -g -O2   -I. -I/vol/src/gnu/gdb/gdb-7.9/gdb
-I/vol/src/gnu/gdb/gdb-7.9/gdb/common -I/vol/src/gnu/gdb/gdb-7.9/gdb/config
-DLOCALEDIR="\"/vol/gcc/share/locale\"" -DHAVE_CONFIG_H
-I/vol/src/gnu/gdb/gdb-7.9/gdb/../include/opcode
-I/vol/src/gnu/gdb/gdb-7.9/gdb/../opcodes/..
-I/vol/src/gnu/gdb/gdb-7.9/gdb/../readline/.. -I../bfd
-I/vol/src/gnu/gdb/gdb-7.9/gdb/../bfd -I/vol/src/gnu/gdb/gdb-7.9/gdb/../include
-I../libdecnumber -I/vol/src/gnu/gdb/gdb-7.9/gdb/../libdecnumber 
-I/vol/src/gnu/gdb/gdb-7.9/gdb/gnulib/import -Ibuild-gnulib/import   -DTUI=1 
-I/usr/include/python2.6 -I/usr/include/python2.6 -Wall
-Wdeclaration-after-statement -Wpointer-arith -Wpointer-sign -Wno-unused
-Wunused-value -Wunused-function -Wno-switch -Wno-char-subscripts
-Wmissing-prototypes -Wdeclaration-after-statement -Wempty-body
-Wmissing-parameter-type -Wold-style-declaration -Wold-style-definition
-Wformat-nonliteral  -c -o i386-sol2-nat.o -MT i386-sol2-nat.o -MMD -MP -MF
.deps/i386-sol2-nat.Tpo /vol/src/gnu/gdb/gdb-7.9/gdb/i386-sol2-nat.c
In file included from /vol/src/gnu/gdb/gdb-7.9/gdb/i386-sol2-nat.c:23:0:
/usr/include/sys/procfs.h:24:2: error: #error "Cannot use procfs in the large
file compilation environment"
make: *** [i386-sol2-nat.o] Error 1

I could track this down as follows:

* before, gdb/config.h didn't define _FILE_OFFSET_BITS, now it has

#define _FILE_OFFSET_BITS 64

* in gdb 7.8, the `checking for special C compiler options needed for large  
files' 
  tests in gdb/configure weren't run at all since they were guarded by 

  test "$enable_largefile" != no

* enable_largefile was set to no in config/largefile.m4

* in gdb 7.9, the default for $plugins changed from its previous no, so
suddenly
  the largefile support gets enabled again, breaking the gdb build

  Rainer

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