+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+ gl_cv_host_cpu_c_abi=x86_64-x32
+else
+ gl_cv_host_cpu_c_abi=x86_64
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+else
+ gl_cv_host_cpu_c_abi=i386
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ ;;
+
+ alphaev[4-8] | alphaev56 | alphapca5[67] | alphaev6[78] )
+ gl_cv_host_cpu_c_abi=alpha
+ ;;
+
+ arm* | aarch64 )
+ # Assume arm with EABI.
+ # On arm64 systems, the C compiler may be generating code in one of
+ # these ABIs:
+ # - aarch64 instruction set, 64-bit pointers, 64-bit 'long': arm64.
+ # - aarch64 instruction set, 32-bit pointers, 32-bit 'long': arm64-ilp32.
+ # - 32-bit instruction set, 32-bit pointers, 32-bit 'long': arm or armhf.
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#ifdef __aarch64__
+ int ok;
+ #else
+ error fail
+ #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#if defined __ILP32__ || defined _ILP32
+ int ok;
+ #else
+ error fail
+ #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+ gl_cv_host_cpu_c_abi=arm64-ilp32
+else
+ gl_cv_host_cpu_c_abi=arm64
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+else
+ # Don't distinguish little-endian and big-endian arm, since they
+ # don't require different machine code for simple operations and
+ # since the user can distinguish them through the preprocessor
+ # defines __ARMEL__ vs. __ARMEB__.
+ # But distinguish arm which passes floating-point arguments and
+ # return values in integer registers (r0, r1, ...) - this is
+ # gcc -mfloat-abi=soft or gcc -mfloat-abi=softfp - from arm which
+ # passes them in float registers (s0, s1, ...) and double registers
+ # (d0, d1, ...) - this is gcc -mfloat-abi=hard. GCC 4.6 or newer
+ # sets the preprocessor defines __ARM_PCS (for the first case) and
+ # __ARM_PCS_VFP (for the second case), but older GCC does not.
+ echo 'double ddd; void func (double dd) { ddd = dd; }' > conftest.c
+ # Look for a reference to the register d0 in the .s file.
+ { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $gl_c_asm_opt conftest.c'
+ { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }; } >/dev/null 2>&1
+ if LC_ALL=C grep -E 'd0,' conftest.$gl_asmext >/dev/null; then
+ gl_cv_host_cpu_c_abi=armhf
+ else
+ gl_cv_host_cpu_c_abi=arm
+ fi
+ rm -f conftest*
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ ;;
+
+ hppa1.0 | hppa1.1 | hppa2.0* | hppa64 )
+ # On hppa, the C compiler may be generating 32-bit code or 64-bit
+ # code. In the latter case, it defines _LP64 and __LP64__.
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#ifdef __LP64__
+ int ok;
+ #else
+ error fail
+ #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+ gl_cv_host_cpu_c_abi=hppa64
+else
+ gl_cv_host_cpu_c_abi=hppa
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ ;;
+
+ ia64* )
+ # On ia64 on HP-UX, the C compiler may be generating 64-bit code or
+ # 32-bit code. In the latter case, it defines _ILP32.
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#ifdef _ILP32
+ int ok;
+ #else
+ error fail
+ #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+ gl_cv_host_cpu_c_abi=ia64-ilp32
+else
+ gl_cv_host_cpu_c_abi=ia64
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ ;;
+
+ mips* )
+ # We should also check for (_MIPS_SZPTR == 64), but gcc keeps this
+ # at 32.
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#if defined _MIPS_SZLONG && (_MIPS_SZLONG == 64)
+ int ok;
+ #else
+ error fail
+ #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+ gl_cv_host_cpu_c_abi=mips64
+else
+ # In the n32 ABI, _ABIN32 is defined, _ABIO32 is not defined (but
+ # may later get defined by <sgidefs.h>), and _MIPS_SIM == _ABIN32.
+ # In the 32 ABI, _ABIO32 is defined, _ABIN32 is not defined (but
+ # may later get defined by <sgidefs.h>), and _MIPS_SIM == _ABIO32.
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#if (_MIPS_SIM == _ABIN32)
+ int ok;
+ #else
+ error fail
+ #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+ gl_cv_host_cpu_c_abi=mipsn32
+else
+ gl_cv_host_cpu_c_abi=mips
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ ;;
+
+ powerpc* )
+ # Different ABIs are in use on AIX vs. Mac OS X vs. Linux,*BSD.
+ # No need to distinguish them here; the caller may distinguish
+ # them based on the OS.
+ # On powerpc64 systems, the C compiler may still be generating
+ # 32-bit code. And on powerpc-ibm-aix systems, the C compiler may
+ # be generating 64-bit code.
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#if defined __powerpc64__ || defined _ARCH_PPC64
+ int ok;
+ #else
+ error fail
+ #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+ # On powerpc64, there are two ABIs on Linux: The AIX compatible
+ # one and the ELFv2 one. The latter defines _CALL_ELF=2.
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#if defined _CALL_ELF && _CALL_ELF == 2
+ int ok;
+ #else
+ error fail
+ #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+ gl_cv_host_cpu_c_abi=powerpc64-elfv2
+else
+ gl_cv_host_cpu_c_abi=powerpc64
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
+else
+ gl_cv_host_cpu_c_abi=powerpc
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ ;;
+
+ rs6000 )
+ gl_cv_host_cpu_c_abi=powerpc
+ ;;
+
+ s390* )
+ # On s390x, the C compiler may be generating 64-bit (= s390x) code
+ # or 31-bit (= s390) code.
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#if defined __LP64__ || defined __s390x__
+ int ok;
+ #else
+ error fail
+ #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+ gl_cv_host_cpu_c_abi=s390x
+else
+ gl_cv_host_cpu_c_abi=s390
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ ;;
+
+ sparc | sparc64 )
+ # UltraSPARCs running Linux have `uname -m` = "sparc64", but the
+ # C compiler still generates 32-bit code.
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#if defined __sparcv9 || defined __arch64__
+ int ok;
+ #else
+ error fail
+ #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+ gl_cv_host_cpu_c_abi=sparc64
+else
+ gl_cv_host_cpu_c_abi=sparc
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ ;;
+
+ *)
+ gl_cv_host_cpu_c_abi="$host_cpu"
+ ;;
+ esac
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_host_cpu_c_abi" >&5
+printf "%s\n" "$gl_cv_host_cpu_c_abi" >&6; }
+
+ HOST_CPU=`echo "$gl_cv_host_cpu_c_abi" | sed -e 's/-.*//'`
+ HOST_CPU_C_ABI="$gl_cv_host_cpu_c_abi"
+
+
+
+ # This was
+ # AC_DEFINE_UNQUOTED([__${HOST_CPU}__])
+ # AC_DEFINE_UNQUOTED([__${HOST_CPU_C_ABI}__])
+ # earlier, but KAI C++ 3.2d doesn't like this.
+ sed -e 's/-/_/g' >> confdefs.h <<EOF
+#ifndef __${HOST_CPU}__
+#define __${HOST_CPU}__ 1
+#endif
+#ifndef __${HOST_CPU_C_ABI}__
+#define __${HOST_CPU_C_ABI}__ 1
+#endif
+EOF
+
+
+
+
+ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking where to find the exponent in a 'float'" >&5
+printf %s "checking where to find the exponent in a 'float'... " >&6; }
+if test ${gl_cv_cc_float_expbit0+y}
+then :
+ printf %s "(cached) " >&6
+else
+
+ if test "$cross_compiling" = yes
+then :
+ gl_cv_cc_float_expbit0="word 0 bit 23"
+else
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+#include <float.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+#define NWORDS \
+ ((sizeof (float) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
+typedef union { float value; unsigned int word[NWORDS]; } memory_float;
+static unsigned int ored_words[NWORDS];
+static unsigned int anded_words[NWORDS];
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