diff options
Diffstat (limited to 'configure')
| -rwxr-xr-x | configure | 220 |
1 files changed, 219 insertions, 1 deletions
@@ -1,5 +1,5 @@ #! /bin/sh -# From configure.ac Id: configure.ac 27757 2015-09-11 04:35:01Z derobins . +# From configure.ac Id: configure.ac 27759 2015-09-11 05:37:17Z derobins . # Guess values for system-dependent variables and create Makefiles. # Generated by GNU Autoconf 2.69 for HDF5 1.8.16-snap16. # @@ -911,6 +911,7 @@ with_mpe enable_direct_vfd with_default_plugindir enable_dconv_exception +enable_dconv_accuracy enable_build_all enable_deprecated_symbols with_default_api_version @@ -1607,6 +1608,8 @@ Optional Features: --enable-dconv-exception if exception handling functions is checked during data conversions [default=yes] + --enable-dconv-accuracy if data accuracy is guaranteed during data + conversions [default=yes] --enable-build-all Build helper programs that only developers should need [default=no] --enable-deprecated-symbols @@ -27247,6 +27250,33 @@ $as_echo "no" >&6; } fi ## ---------------------------------------------------------------------- +## Decide whether the data accuracy has higher priority during data +## conversions. If not, some hard conversions will still be prefered even +## though the data may be wrong (for example, some compilers don't +## support denormalized floating values) to maximize speed. +## +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether data accuracy is guaranteed during data conversions" >&5 +$as_echo_n "checking whether data accuracy is guaranteed during data conversions... " >&6; } +# Check whether --enable-dconv-accuracy was given. +if test "${enable_dconv_accuracy+set}" = set; then : + enableval=$enable_dconv_accuracy; DATA_ACCURACY=$enableval +else + DATA_ACCURACY=yes +fi + + +if test "$DATA_ACCURACY" = "yes"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5 +$as_echo "yes" >&6; } + +$as_echo "#define WANT_DATA_ACCURACY 1" >>confdefs.h + +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + +## ---------------------------------------------------------------------- ## Set the flag to indicate that the machine has window style pathname, ## that is, "drive-letter:\" (e.g. "C:") or "drive-letter:/" (e.g. "C:/"). ## (This flag should be _unset_ for all machines, except for Windows, where @@ -27510,6 +27540,194 @@ $as_echo "no" >&6; } fi ## ---------------------------------------------------------------------- +## Set the flag to indicate that the machine can accurately convert +## 'long double' to '(unsigned) long long' values. This flag should +## be set for all machines, except for IBM XL C compilers. Historically, +## this has also been a problem with OS X (version 10.4) but not current +## versions of that OS. +## +## When the bit sequence of long double is 0x4351ccf385ebc8a0bfcc2a3c..., +## the values of (unsigned)long long start to go wrong on these +## two machines. Adjusting it higher to 0x4351ccf385ebc8a0dfcc... or +## 0x4351ccf385ebc8a0ffcc... will make the converted values wildly wrong. +## This test detects this wrong behavior and disable the test. +## +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if correctly converting long double to (unsigned) long long values" >&5 +$as_echo_n "checking if correctly converting long double to (unsigned) long long values... " >&6; } + +if test ${ac_cv_sizeof_long_double} = 0; then + hdf5_cv_ldouble_to_llong_accurate=${hdf5_cv_ldouble_to_llong_accurate=no} +else + if ${hdf5_cv_ldouble_to_llong_accurate+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test "$cross_compiling" = yes; then : + { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5 +$as_echo "$as_me: error: in \`$ac_pwd':" >&2;} +as_fn_error $? "cannot run test program while cross compiling +See \`config.log' for more details" "$LINENO" 5; } +else + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + + int main(void) + { + long double ld = 20041683600089727.779961L; + long long ll; + unsigned long long ull; + unsigned char s[16]; + int ret = 0; + + if(sizeof(long double) == 16) { + /*make sure the long double type is the same as the failing type + *which has 16 bytes in size and 11 bits of exponent. If it is, + *the bit sequence should be like below. It's not + *a decent way to check but this info isn't available. */ + memcpy(s, &ld, 16); + if(s[0]==0x43 && s[1]==0x51 && s[2]==0xcc && s[3]==0xf3 && + s[4]==0x85 && s[5]==0xeb && s[6]==0xc8 && s[7]==0xa0 && + s[8]==0xbf && s[9]==0xcc && s[10]==0x2a && s[11]==0x3c) { + + /*slightly adjust the bit sequence (s[8]=0xdf). The converted + *values will go wild on Mac OS 10.4 and IRIX64 6.5.*/ + s[0]=0x43; s[1]=0x51; s[2]=0xcc; s[3]=0xf3; + s[4]=0x85; s[5]=0xeb; s[6]=0xc8; s[7]=0xa0; + s[8]=0xdf; s[9]=0xcc; s[10]=0x2a; s[11]=0x3c; + s[12]=0x3d; s[13]=0x85; s[14]=0x56; s[15]=0x20; + + memcpy(&ld, s, 16); + ll = (long long)ld; + ull = (unsigned long long)ld; + + if(ll != 20041683600089728 || ull != 20041683600089728) + ret = 1; + } + } + done: + exit(ret); + } + +_ACEOF +if ac_fn_c_try_run "$LINENO"; then : + hdf5_cv_ldouble_to_llong_accurate=yes +else + hdf5_cv_ldouble_to_llong_accurate=no +fi +rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \ + conftest.$ac_objext conftest.beam conftest.$ac_ext +fi + +fi + +fi + +if test ${hdf5_cv_ldouble_to_llong_accurate} = "yes"; then + +$as_echo "#define LDOUBLE_TO_LLONG_ACCURATE 1" >>confdefs.h + + { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5 +$as_echo "yes" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + +## ---------------------------------------------------------------------- +## Set the flag to indicate that the machine can accurately convert +## '(unsigned) long long' to 'long double' values. This flag should +## be set for all machines, except for IBM XL C compilers. Historically, +## this has also been a problem with OS X (version 10.4) but not current +## versions of that OS. +## +## When the bit sequences are 003fff..., 007fff..., 00ffff..., 01ffff..., +## ..., 7fffff..., the converted values are twice as big as they should be. +## +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if correctly converting (unsigned) long long to long double values" >&5 +$as_echo_n "checking if correctly converting (unsigned) long long to long double values... " >&6; } + +if test ${ac_cv_sizeof_long_double} = 0; then + hdf5_cv_llong_to_ldouble_correct=${hdf5_cv_llong_to_ldouble_correct=no} +else + if ${hdf5_cv_llong_to_ldouble_correct+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test "$cross_compiling" = yes; then : + { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5 +$as_echo "$as_me: error: in \`$ac_pwd':" >&2;} +as_fn_error $? "cannot run test program while cross compiling +See \`config.log' for more details" "$LINENO" 5; } +else + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + + int main(void) + { + long double ld; + long long ll; + unsigned long long ull; + unsigned char s[16]; + int flag=0, ret=0; + + /*Determine if long double has 16 byte in size, 11 bit exponent, and + *the bias is 0x3ff */ + if(sizeof(long double) == 16) { + ld = 1.0L; + memcpy(s, &ld, 16); + if(s[0]==0x3f && s[1]==0xf0 && s[2]==0x00 && s[3]==0x00 && + s[4]==0x00 && s[5]==0x00 && s[6]==0x00 && s[7]==0x00) + flag = 1; + } + + if(flag==1 && sizeof(long long)==8) { + ll = 0x01ffffffffffffffLL; + ld = (long double)ll; + memcpy(s, &ld, 16); + /*Check if the bit sequence is as supposed to be*/ + if(s[0]!=0x43 || s[1]!=0x7f || s[2]!=0xff || s[3]!=0xff || + s[4]!=0xff || s[5]!=0xff || s[6]!=0xff || s[7]!=0xff || + s[8]!=0xf0 || s[9]!=0x00 || s[10]!=0x00 || s[11]!=0x00) + ret = 1; + } + if(flag==1 && sizeof(unsigned long long)==8) { + ull = 0x01ffffffffffffffULL; + ld = (long double)ull; + memcpy(s, &ld, 16); + if(s[0]!=0x43 || s[1]!=0x7f || s[2]!=0xff || s[3]!=0xff || + s[4]!=0xff || s[5]!=0xff || s[6]!=0xff || s[7]!=0xff || + s[8]!=0xf0 || s[9]!=0x00 || s[10]!=0x00 || s[11]!=0x00) + ret = 1; + } + done: + exit(ret); + } + +_ACEOF +if ac_fn_c_try_run "$LINENO"; then : + hdf5_cv_llong_to_ldouble_correct=yes +else + hdf5_cv_llong_to_ldouble_correct=no +fi +rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \ + conftest.$ac_objext conftest.beam conftest.$ac_ext +fi + +fi + +fi + +if test ${hdf5_cv_llong_to_ldouble_correct} = "yes"; then + +$as_echo "#define LLONG_TO_LDOUBLE_CORRECT 1" >>confdefs.h + + { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5 +$as_echo "yes" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + +## ---------------------------------------------------------------------- ## Set some variables for general configuration information to be saved ## and installed with the libraries (used to generate libhdf5.settings). ## |