gdb build failures

[Ralf Corsepius]

On Sun, 2008-04-13 at 10:54 -0600, Daron Chabot wrote:
> All,
> 
> FYI: "Out of the box", gdb-6.7.1 (and gdb-6.8 as well) do not build  
> on mac os x (Tiger). The failure is due to the addition of "-Werror"  
> to the gdb's build CFLAGS (and maybe also due to the use of  
> gcc-4.x.x ?).
> 
> Once the build gets to gdb-6.x.x/gdb, it trips over warnings like these:
> ../../gdb-6.7.1/gdb/i386-tdep.c: In function 'i386_collect_fpregset':
> ../../gdb-6.7.1/gdb/i386-tdep.c:2035: warning: format not a string  
> literal, argument types not checked
> ../../gdb-6.7.1/gdb/i386-tdep.c: In function 'i386_print_insn':
> ../../gdb-6.7.1/gdb/i386-tdep.c:2139: warning: format not a string  
> literal, argument types not checked
> 
> which, of course, cause the build to bail because of the -Werror flag...
> 
> In each warning case, the culprit code is one form or another of  
> error-reporting or gdb-assert( ) statements. These functions may not  
> be dangerous in any way, but gcc seems to think that they *could* be...
> 
> Simply removing the "-Werror" addition from the appropriate Makefile  
> allows the build(s) to complete successfully, albeit with much noise...

cf. below. You seem to have a typo in your configure options.

> Should the gdb and gcc lists be notified ?
--enable-werror and using -Werror during gcc/gdb builts are band-aids
for developing gdb/gcc themselves. You normally don't want to use them
when wanting to build gdb/gcc when wanting to install gdb/gdb.

That said, you will want to not pass --enable-werror to configure when
building gdb/gcc, rsp. you might even want to pass --disable-werror.

I.e. the gdb/gcc list might be interested in seeing these
warnings/errors. 

You, as a user/system-integrator/installer are not really interested in
them.

> Info:
> ------------------------------------------------------------------------ 
> ------------------------------
> djc at toolbox--> ../gdb-6.7.1/configure --target=i386-rtems --prefix=/ 
> opt/rtems
> 
> djc at toolbox--> uname -a
> Darwin toolbox 8.11.1 Darwin Kernel Version 8.11.1: Wed Oct 10  
> 18:23:28 PDT 2007; root:xnu-792.25.20~1/RELEASE_I386 i386 i386
> 
> djc at toolbox--> gcc -v
> Using built-in specs.
> Target: i686-apple-darwin8
> Configured with: /private/var/tmp/gcc/gcc-5367.obj~1/src/configure -- 
> disable-checking -enable-werror --prefix=/usr --mandir=/share/man -- 
> enable-languages=c,objc,c++,obj-c++ --program-transform-name=/^[cg] 
> [^.-]*$/s/$/-4.0/ --with-gxx-include-dir=/include/c++/4.0.0 --with- 
> slibdir=/usr/lib --build=powerpc-apple-darwin8 --with-arch=nocona -- 
> with-tune=generic --program-prefix= --host=i686-apple-darwin8 -- 
> target=i686-apple-darwin8
> Thread model: posix
> gcc version 4.0.1 (Apple Computer, Inc. build 5367)
Check your options:

./configure --help | grep werror
  --enable-werror         enable -Werror in bootstrap stage2 and later

I see -enable-werror above ("-" vs "--")

Ralf