NetBSD port.

* arith.c (bignum_dbl_ipt): Added missing #if HAVE_DOUBLE_INTPTR_T
around function

* configure: NetBSD's shell is too pathetic to expand "$@" properly
when there are no positional arguments, so I applied the ${@+"$@"}
trick.
(make): New variable. GNU make might be known only as gmake,
so we now detect the command for our own use within the configure
script and also for giving the user advice on what command to use for
building. Put in a fix so that the attempt to run $make --version
does not bail the script under "set -e" if that command terminates
unsuccessfully.
The check for clashing names has been moved earlier, so that
the renaming #define's appear early in config.h (so config.h itself
can rely on the renames). The identifier longlong_t has been added
to the potential clash list.  NetBSD exposes this identifier in spite
of -D_POSIX_SOURCE=2, and it clashes with our longlong_t.
The tests for integers wider than long long has been modified
to actually compile a multiplication of two long-long-s into
the wider precision. On the NetBSD system, with gcc 4.1.3, I found
that the __int128 type is there, but doesn't actually work;
compilation of arith.c bails with an internal compiler error.
We now get this internal error at configure time and avoid using
the type.

1 files changed, 4 insertions, 0 deletions

diff --git a/arith.c b/arith.c
index f06e77b6..de8d782e 100644
--- a/arith.c
+++ b/arith.c
@@ -68,6 +68,8 @@ val bignum(cnum cn)
   return n;
 }
 
+#if HAVE_DOUBLE_INTPTR_T
+
 static val bignum_dbl_ipt(double_intptr_t di)
 {
   val n = make_bignum();
@@ -75,6 +77,8 @@ static val bignum_dbl_ipt(double_intptr_t di)
   return n;
 }
 
+#endif
+
 val normalize(val bignum)
 {
   if (mp_cmp_mag(mp(bignum), &NUM_MAX_MP) == MP_GT) {