Cheesy kconfig stuff:
- silent/quiet/verbose build:
- ct-ng by default only prints quit messages, such as "CC xxx",
- if using V=0, nothing is printed,
- if using V=1, the full command lines are printed,
- other values are indeterminate,
- should help in debugging the kconfig stuff;
- complete kconfig/{,m}conf generation:
- fully dynamic dependencies on source files,
- compilation of .c into .o, then linking (instead of direct linking),
- VPATH usage when not --local;
Typo + a coment moved.

/trunk/kconfig/kconfig.mk | 140 87 53 0 +++++++++++++++++++++++++++++++++--------------------
/trunk/tools/tools.mk | 12 6 6 0 ++--
/trunk/steps.mk | 6 3 3 0 +-
/trunk/samples/samples.mk | 30 15 15 0 +++++-----
/trunk/ct-ng.in | 40 28 12 0 +++++++++++----
5 files changed, 139 insertions(+), 89 deletions(-)

See http://gcc.gnu.org/PR3106

Backported from gcc-3.0.x

Fixes error

  .../binutils-2.11.2/libiberty/strerror.c:468: error: conflicting types for `sys_nerr'

  /usr/include/stdio.h:258: error: previous declaration of `sys_nerr'

  make[1]: *** [strerror.o] Error 1

  make: *** [all-libiberty] Error 2

on Mac OS X.

--- gcc-2.95.3/libiberty/strerror.c.old	2004-03-24 16:23:19.000000000 -0800

+++ gcc-2.95.3/libiberty/strerror.c	2004-03-24 16:23:48.000000000 -0800

@@ -13,6 +13,7 @@

    incompatible with our later declaration, perhaps by using const

    attributes.  So we hide the declaration in errno.h (if any) using a

    macro. */

+#define sys_nerr sys_nerr__

 #define sys_errlist sys_errlist__

 #endif

@@ -20,6 +21,7 @@

 #include <errno.h>

 #ifdef HAVE_SYS_ERRLIST

+#undef sys_nerr

 #undef sys_errlist

 #endif