https://perl5.git.perl.org / metaconfig.git / blame
| Commit | Line | Data |
|---|---|---|
| d8875586 MBT |
1 | ?RCS: $Id: d_dbl_dig.U 1 2006-08-24 12:32:52Z rmanfredi $ |
| 2 | ?RCS: | |
| 3 | ?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi | |
| 4 | ?RCS: | |
| 5 | ?RCS: You may redistribute only under the terms of the Artistic Licence, | |
| 6 | ?RCS: as specified in the README file that comes with the distribution. | |
| 7 | ?RCS: You may reuse parts of this distribution only within the terms of | |
| 8 | ?RCS: that same Artistic Licence; a copy of which may be found at the root | |
| 9 | ?RCS: of the source tree for dist 4.0. | |
| 10 | ?RCS: | |
| 11 | ?RCS: Original Author: Andy Dougherty <doughera@lafcol.lafayette.edu> | |
| 12 | ?RCS: | |
| 13 | ?RCS: $Log: d_dbl_dig.U,v $ | |
| 14 | ?RCS: Revision 3.0.1.1 1994/08/29 16:07:28 ram | |
| 15 | ?RCS: patch32: created by ADO | |
| 16 | ?RCS: | |
| 17 | ?MAKE:d_dbl_dig: Myread contains cat rm Setvar i_limits i_float \ | |
| 18 | cppstdin cppflags cppminus | |
| 19 | ?MAKE: -pick add $@ %< | |
| 20 | ?S:d_dbl_dig: | |
| 21 | ?S: This variable conditionally defines d_dbl_dig if this system's | |
| 22 | ?S: header files provide DBL_DIG, which is the number of significant | |
| 23 | ?S: digits in a double precision number. | |
| 24 | ?S:. | |
| 25 | ?C:HAS_DBL_DIG: | |
| 26 | ?C: This symbol, if defined, indicates that this system's <float.h> | |
| 27 | ?C: or <limits.h> defines the symbol DBL_DIG, which is the number | |
| 28 | ?C: of significant digits in a double precision number. If this | |
| 29 | ?C: symbol is not defined, a guess of 15 is usually pretty good. | |
| 30 | ?C:. | |
| 31 | ?H:#$d_dbl_dig HAS_DBL_DIG /**/ | |
| 32 | ?H:. | |
| 33 | ?F:!dbl_dig.c | |
| 34 | ?LINT:set d_dbl_dig | |
| 35 | : See if number of significant digits in a double precision number is known | |
| 36 | echo " " | |
| 37 | $cat >dbl_dig.c <<EOM | |
| 38 | #$i_limits I_LIMITS | |
| 39 | #$i_float I_FLOAT | |
| 40 | #ifdef I_LIMITS | |
| 41 | #include <limits.h> | |
| 42 | #endif | |
| 43 | #ifdef I_FLOAT | |
| 44 | #include <float.h> | |
| 45 | #endif | |
| 46 | #ifdef DBL_DIG | |
| 47 | printf("Contains DBL_DIG"); | |
| 48 | #endif | |
| 49 | EOM | |
| 50 | $cppstdin $cppflags $cppminus < dbl_dig.c >dbl_dig.E 2>/dev/null | |
| 51 | if $contains 'DBL_DIG' dbl_dig.E >/dev/null 2>&1; then | |
| 52 | echo "DBL_DIG found." >&4 | |
| 53 | val="$define" | |
| 54 | else | |
| 55 | echo "DBL_DIG NOT found." >&4 | |
| 56 | val="$undef" | |
| 57 | fi | |
| 58 | $rm -f dbl_dig.? | |
| 59 | set d_dbl_dig | |
| 60 | eval $setvar | |
| 61 |