crosstool-ng: patches/gcc/4.2.1/170-missing-execinfo

scripts: check for, and warn about an unset CT_PREFIX_DIR

The user shall provide a directory to install the toolchain into.
If he/she does not, this is an error, and shall be detected properly,
rather than relying on failure down the road.

Thanks to "Pedro I. Sanchez" <psanchez@colcan.ca> for pointing out
the issue:
http://sourceware.org/ml/crossgcc/2009-12/msg00011.html

     1 diff -durN gcc-4.2.1.orig/boehm-gc/include/gc.h gcc-4.2.1/boehm-gc/include/gc.h

     2 --- gcc-4.2.1.orig/boehm-gc/include/gc.h	2006-09-18 20:45:08.000000000 +0200

     3 +++ gcc-4.2.1/boehm-gc/include/gc.h	2007-08-03 20:33:00.000000000 +0200

     4 @@ -502,7 +502,7 @@

     5  #if defined(__linux__) || defined(__GLIBC__)

     6  # include <features.h>

     7  # if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1 || __GLIBC__ > 2) \

     8 -     && !defined(__ia64__)

     9 +     && !defined(__ia64__) && !defined(__UCLIBC__)

    10  #   ifndef GC_HAVE_BUILTIN_BACKTRACE

    11  #     define GC_HAVE_BUILTIN_BACKTRACE

    12  #   endif

author	"Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
	Sat Dec 19 12:44:21 2009 +0100 (2009-12-19)
changeset 1663	e94f4ffddd1d
parent 313	2f223aafc7cb
permissions	-rw-r--r--