comptools: do not force build of make-3.81 unless really needed

On systems with make-3.82, we forcibly force the build and the use
of make-3.81

But some newer tools break when building with make-3.81. For example,
eglibc-3.18 breaks.

Introduce a new blind options that tools may select if they require
make-3.81. If the system does not have make-3.81, and this option is
selected, then we force the build of make-3.81. Otherwise, we leave
it to the user to decide on his own.

Note that no component selects this option for now. It will come in
later patches as we find them.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

diff -durN glibc-2.13.orig/elf/dl-lookup.c glibc-2.13/elf/dl-lookup.c

--- glibc-2.13.orig/elf/dl-lookup.c	2009-03-30 23:14:32.000000000 +0200

+++ glibc-2.13/elf/dl-lookup.c	2009-11-13 00:51:36.000000000 +0100

@@ -301,6 +301,12 @@

 	      /* FALLTHROUGH */

 	    case STB_GLOBAL:

	    success:

+#ifdef __mips__

+	      /* HACK: MIPS marks its lazy evaluation stubs with SHN_UNDEF

+		 symbols, we skip them. */

+	      if (sym->st_shndx == SHN_UNDEF)

+		break;

+#endif

 	      /* Global definition.  Just what we need.  */

 	      result->s = sym;

 	      result->m = (struct link_map *) map;