diff options
Diffstat (limited to 'configure')
| -rwxr-xr-x | configure | 297 |
1 files changed, 293 insertions, 4 deletions
@@ -1,5 +1,5 @@ #! /bin/sh -# From configure.in Revision: 67461 . +# From configure.in Revision: 68245 . # Guess values for system-dependent variables and create Makefiles. # Generated by GNU Autoconf 2.61 for python 3.1. # @@ -21214,6 +21214,94 @@ fi LIBS_SAVE=$LIBS LIBS="$LIBS $LIBM" +# Detect whether system arithmetic is subject to x87-style double +# rounding issues. The result of this test has little meaning on non +# IEEE 754 platforms. On IEEE 754, test should return 1 if rounding +# mode is round-to-nearest and double rounding issues are present, and +# 0 otherwise. See http://bugs.python.org/issue2937 for more info. +{ echo "$as_me:$LINENO: checking for x87-style double rounding" >&5 +echo $ECHO_N "checking for x87-style double rounding... $ECHO_C" >&6; } +if test "${ac_cv_x87_double_rounding+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + +if test "$cross_compiling" = yes; then + ac_cv_x87_double_rounding=no +else + cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ + +#include <stdlib.h> +#include <math.h> +int main() { + volatile double x, y, z; + /* 1./(1-2**-53) -> 1+2**-52 (correct), 1.0 (double rounding) */ + x = 0.99999999999999989; /* 1-2**-53 */ + y = 1./x; + if (y != 1.) + exit(0); + /* 1e16+2.99999 -> 1e16+2. (correct), 1e16+4. (double rounding) */ + x = 1e16; + y = 2.99999; + z = x + y; + if (z != 1e16+4.) + exit(0); + /* both tests show evidence of double rounding */ + exit(1); +} + +_ACEOF +rm -f conftest$ac_exeext +if { (ac_try="$ac_link" +case "(($ac_try" in + *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; + *) ac_try_echo=$ac_try;; +esac +eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5 + (eval "$ac_link") 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } && { ac_try='./conftest$ac_exeext' + { (case "(($ac_try" in + *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; + *) ac_try_echo=$ac_try;; +esac +eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5 + (eval "$ac_try") 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; }; then + ac_cv_x87_double_rounding=no +else + echo "$as_me: program exited with status $ac_status" >&5 +echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + +( exit $ac_status ) +ac_cv_x87_double_rounding=yes +fi +rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext +fi + + +fi + +{ echo "$as_me:$LINENO: result: $ac_cv_x87_double_rounding" >&5 +echo "${ECHO_T}$ac_cv_x87_double_rounding" >&6; } +if test "$ac_cv_x87_double_rounding" = yes +then + +cat >>confdefs.h <<\_ACEOF +#define X87_DOUBLE_ROUNDING 1 +_ACEOF + +fi + + # On FreeBSD 6.2, it appears that tanh(-0.) returns 0. instead of # -0. on some architectures. { echo "$as_me:$LINENO: checking whether tanh preserves the sign of zero" >&5 @@ -21400,9 +21488,7 @@ done - - -for ac_func in acosh asinh atanh copysign expm1 finite isinf isnan log1p +for ac_func in acosh asinh atanh copysign expm1 finite log1p do as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh` { echo "$as_me:$LINENO: checking for $ac_func" >&5 @@ -21495,6 +21581,209 @@ _ACEOF fi done +{ echo "$as_me:$LINENO: checking whether isinf is declared" >&5 +echo $ECHO_N "checking whether isinf is declared... $ECHO_C" >&6; } +if test "${ac_cv_have_decl_isinf+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ +#include <math.h> + +int +main () +{ +#ifndef isinf + (void) isinf; +#endif + + ; + return 0; +} +_ACEOF +rm -f conftest.$ac_objext +if { (ac_try="$ac_compile" +case "(($ac_try" in + *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; + *) ac_try_echo=$ac_try;; +esac +eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5 + (eval "$ac_compile") 2>conftest.er1 + ac_status=$? + grep -v '^ *+' conftest.er1 >conftest.err + rm -f conftest.er1 + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } && { + test -z "$ac_c_werror_flag" || + test ! -s conftest.err + } && test -s conftest.$ac_objext; then + ac_cv_have_decl_isinf=yes +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + + ac_cv_have_decl_isinf=no +fi + +rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext +fi +{ echo "$as_me:$LINENO: result: $ac_cv_have_decl_isinf" >&5 +echo "${ECHO_T}$ac_cv_have_decl_isinf" >&6; } +if test $ac_cv_have_decl_isinf = yes; then + +cat >>confdefs.h <<_ACEOF +#define HAVE_DECL_ISINF 1 +_ACEOF + + +else + cat >>confdefs.h <<_ACEOF +#define HAVE_DECL_ISINF 0 +_ACEOF + + +fi +{ echo "$as_me:$LINENO: checking whether isnan is declared" >&5 +echo $ECHO_N "checking whether isnan is declared... $ECHO_C" >&6; } +if test "${ac_cv_have_decl_isnan+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ +#include <math.h> + +int +main () +{ +#ifndef isnan + (void) isnan; +#endif + + ; + return 0; +} +_ACEOF +rm -f conftest.$ac_objext +if { (ac_try="$ac_compile" +case "(($ac_try" in + *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; + *) ac_try_echo=$ac_try;; +esac +eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5 + (eval "$ac_compile") 2>conftest.er1 + ac_status=$? + grep -v '^ *+' conftest.er1 >conftest.err + rm -f conftest.er1 + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } && { + test -z "$ac_c_werror_flag" || + test ! -s conftest.err + } && test -s conftest.$ac_objext; then + ac_cv_have_decl_isnan=yes +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + + ac_cv_have_decl_isnan=no +fi + +rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext +fi +{ echo "$as_me:$LINENO: result: $ac_cv_have_decl_isnan" >&5 +echo "${ECHO_T}$ac_cv_have_decl_isnan" >&6; } +if test $ac_cv_have_decl_isnan = yes; then + +cat >>confdefs.h <<_ACEOF +#define HAVE_DECL_ISNAN 1 +_ACEOF + + +else + cat >>confdefs.h <<_ACEOF +#define HAVE_DECL_ISNAN 0 +_ACEOF + + +fi +{ echo "$as_me:$LINENO: checking whether isfinite is declared" >&5 +echo $ECHO_N "checking whether isfinite is declared... $ECHO_C" >&6; } +if test "${ac_cv_have_decl_isfinite+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ +#include <math.h> + +int +main () +{ +#ifndef isfinite + (void) isfinite; +#endif + + ; + return 0; +} +_ACEOF +rm -f conftest.$ac_objext +if { (ac_try="$ac_compile" +case "(($ac_try" in + *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; + *) ac_try_echo=$ac_try;; +esac +eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5 + (eval "$ac_compile") 2>conftest.er1 + ac_status=$? + grep -v '^ *+' conftest.er1 >conftest.err + rm -f conftest.er1 + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } && { + test -z "$ac_c_werror_flag" || + test ! -s conftest.err + } && test -s conftest.$ac_objext; then + ac_cv_have_decl_isfinite=yes +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + + ac_cv_have_decl_isfinite=no +fi + +rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext +fi +{ echo "$as_me:$LINENO: result: $ac_cv_have_decl_isfinite" >&5 +echo "${ECHO_T}$ac_cv_have_decl_isfinite" >&6; } +if test $ac_cv_have_decl_isfinite = yes; then + +cat >>confdefs.h <<_ACEOF +#define HAVE_DECL_ISFINITE 1 +_ACEOF + + +else + cat >>confdefs.h <<_ACEOF +#define HAVE_DECL_ISFINITE 0 +_ACEOF + + +fi + + LIBS=$LIBS_SAVE |