configure: problems with 128 bit integer detection.

* configure: we can't assume that we can just edit "int" to
"uint" in forming the superulong_t type. Let's consolidate
the detection of the signed and unsigned superlong. Only
if both are available, then emit material into config.h,
along with a single constant: HAVE_SUPERLONG_T.

* mpi/mpi-types.h: Don't refer to removed HAVE_USUPERLONG_T.
Change superulong_t to usuperlong_t.

2 files changed, 13 insertions, 12 deletions

diff --git a/configure b/configure
index 02c3f55c..d9bf1e80 100755
--- a/configure
+++ b/configure
@@ -1100,19 +1100,16 @@ fi
 
 if [ -n "$superlong" ] ; then
   printf '"%s"\n' "$superlong"
-  printf "#define HAVE_SUPERLONG_T 1\n" >> config.h
-  printf "typedef $superlong superlong_t;\n" >> config.h
-  printf "typedef $(echo $superlong | sed -e s/int/uint/) superulong_t;\n" >> config.h
 else
   printf "none\n"
 fi
 
 printf "Checking what C type we have for u. integers wider than \"long long\" ... "
 
-usuperlong=
+superulong=
 
 if [ -z "$broken128" ] ; then
-  for try_type in uint128 uint128_t __uint128 __uint128_t ; do
+  for try_type in uint128 uint128_t __uint128 __uint128_t 'unsigned int128'; do
     cat > conftest.c <<!
 #include "config.h"
 int main(void)
@@ -1124,20 +1121,24 @@ int main(void)
 longlong_t a, b;
 !
     if conftest_o ; then
-      usuperlong=$try_type
+      superulong=$try_type
       break
     fi
   done
 fi
 
-if [ -n "$usuperlong" ] ; then
-  printf '"%s"\n' "$usuperlong"
-  printf "#define HAVE_USUPERLONG_T 1\n" >> config.h
-  printf "typedef $usuperlong usuperlong_t;\n" >> config.h
+if [ -n "$superulong" ] ; then
+  printf '"%s"\n' "$superulong"
 else
   printf "none\n"
 fi
 
+if [ -n "$superlong" -a -n "$superulong" ] ; then
+  printf "#define HAVE_SUPERLONG_T 1\n" >> config.h
+  printf "typedef $superlong superlong_t;\n" >> config.h
+  printf "typedef $superulong superulong_t;\n" >> config.h
+fi
+
 printf "Checking what C integer type can hold a pointer ... "
 
 read_syms()
diff --git a/mpi/mpi-types.h b/mpi/mpi-types.h
index a55174fb..098efe15 100644
--- a/mpi/mpi-types.h
+++ b/mpi/mpi-types.h
@@ -11,11 +11,11 @@ typedef unsigned mp_size;
  */
 typedef int mp_err;
 
-#if HAVE_USUPERLONG_T && HAVE_ULONGLONG_T && \
+#if HAVE_SUPERLONG_T && HAVE_ULONGLONG_T && \
     SIZEOF_SUPERLONG_T / 2 == SIZEOF_LONGLONG_T && \
     SIZEOF_PTR >= SIZEOF_LONGLONG_T
   typedef ulonglong_t mp_digit;
-  typedef usuperlong_t mp_word;
+  typedef superulong_t mp_word;
   #define MP_DIGIT_SIZE SIZEOF_LONGLONG_T
   #define DIGIT_FMT "%" #SIZEOF_SUPERLONG_T "llx"
 #elif HAVE_ULONGLONG_T && SIZEOF_LONGLONG_T / 2 == SIZEOF_LONG && \