Re: [MinGW-dvlpr] Problem xcompiling mingw-runtime-3.10

[Keith M. <kei...@us...>]

Hi Michael,

On Monday 28 August 2006 6:49 am, Michael Gerdau wrote:
> However as far as I understand the problem I'm facing with generating
> the runtime libs during build the xcompiler it is that I need a way
> to omit the two checks I currently do patch out of runtime's configure.
> Both require a fully working xgcc and that one needs a few libs/objs
> that aren't there until after runtime has been build (a typical
> bootstrap issue :)

Yes.  The the two checks which are failing are, as you note:--
  'checking for C compiler default output file name' (lines 1696-1742)
  'checking for suffix of executables' (lines 1790-1815)

Both of these tests are embedded within autoconf's `AC_PROG_CC' macro, so 
there is no easy way to disable them, at the autoconf level.  As you have 
discovered, you can patch them out of `configure' itself, but that's not 
really a satisfactory solution--your patch could too easily be rendered 
invalid, just by the simple action of running autoconf, regenerating 
`configure' to incorporate some minor (and maybe unrelated) change, or 
even simply if a different autoconf version is deployed.

Furthermore, both of these tests require that the C compiler, xgcc in our 
case, be able to successfully link a minimal test program--it doesn't 
need to be able to run it, if cross-compiling, but the link must succeed. 
In our case, that link step is failing, because xgcc implicitly tries to 
link in runtime objects which haven't yet been built.  Perhaps passing 
`LDFLAGS=-nostdlib' as a `configure' parameter could help, or maybe we 
need to prebuild a minimal subset of the runtime objects, before 
configuring for the complete build.  I'll have a play with it, when I can 
find some spare time.

Regards,
Keith.