Re: [RFC] Change configure.in so -W arnings match reality

[David Whedon <davidw at gordian dot com>]

I'm building the gdb 5.0 branch on our sgi and it has a problem with the
warning flags.

This error, I believe, is caused by this patch.
(http://sourceware.cygnus.com/ml/gdb-patches/2000-q1/msg00276.html)
My problem would be fixed if -Wreturn-type is removed from gdb/configure.in 
(see the patch for more info)

I think it is because I am using an old gcc (October '99)

This error went away after I removed '-Wreturn-type' from the gdb/Makefile 
WARN_CFLAGS line.

Here is the error:

gmake[1]: Entering directory `/n/delphi2/irix_52/usr/local/src/gdb-build/68k/gdb'
gcc -c -O2    -I. -I/usr/local/src/rib/gdb-5.0/src//gdb -I/usr/local/src/rib/gdb-5.0/src//gdb/config -DHAVE_CONFIG_H -I/usr/local/src/rib/gdb-5.0/src//gdb/../include/opcode -I/usr/local/src/rib/gdb-5.0/src//gdb/../readline/.. -I../bfd -I/usr/local/src/rib/gdb-5.0/src//gdb/../bfd  -I/usr/local/src/rib/gdb-5.0/src//gdb/../include -I../intl -I/usr/local/src/rib/gdb-5.0/src//gdb/../intl -I/usr/local/src/rib/gdb-5.0/src//gdb/tui  -DUSE_INCLUDED_REGEX -Wimplicit -Wreturn-type -Wcomment -Wtrigraphs -Wformat -Wparentheses -Wpointer-arith  /usr/local/src/rib/gdb-5.0/src//gdb/main.c
cc1: Invalid option `-Wreturn-type'
gmake[1]: *** [main.o] Error 1
gmake[1]: Leaving directory `/n/delphi2/irix_52/usr/local/src/gdb-build/68k/gdb'
gmake: *** [all-gdb] Error 2

Other info:

# gcc -v
Reading specs from /usr/local/lib/gcc-lib/mips-sgi-irix5.3/2.95.2/specs
gcc version 2.95.2 19991024 (release)

# /usr/local/lib/gcc-lib/mips-sgi-irix5.3/2.95.2/cc1 --help | grep "\-W"
  -W                      Enable extra warnings
  -Winline                Warn when an inlined function cannot be inlined
  -Wuninitialized         Warn about unitialized automatic variables
  -Wcast-align            Warn about pointer casts which increase alignment
  -Waggregate-return      Warn about returning structures, unions or arrays
  -Wswitch                Warn about enumerated switches missing a specific ce
  -Wshadow                Warn when one local variable shadows another
snip . . . . snip

I'll spare you the whole list, but -Wreturn-type isn't in there.


I'm not sure what else it could be, and I figure others could be bitten by this too, unless my gcc install is somehow non-standard.

-David