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7996fb80 JH |
1 | ?RCS: $Id$ |
2 | ?RCS: | |
3 | ?RCS: Copyright (c) 1999, Jarkko Hietaniemi | |
41322e17 | 4 | ?RCS: |
7996fb80 JH |
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 3.0. | |
10 | ?RCS: | |
11 | ?MAKE:d_ldbl_dig: Myread contains cat rm Setvar i_limits i_float \ | |
12 | cppstdin cppflags cppminus | |
13 | ?MAKE: -pick add $@ %< | |
14 | ?S:d_ldbl_dig: | |
15 | ?S: This variable conditionally defines d_ldbl_dig if this system's | |
16 | ?S: header files provide LDBL_DIG, which is the number of significant | |
17 | ?S: digits in a long double precision number. | |
18 | ?S:. | |
19 | ?C:HAS_LDBL_DIG: | |
20 | ?C: This symbol, if defined, indicates that this system's <float.h> | |
21 | ?C: or <limits.h> defines the symbol LDBL_DIG, which is the number | |
22 | ?C: of significant digits in a long double precision number. Unlike | |
23 | ?C: for DBL_DIG, there's no good guess for LDBL_DIG if it is undefined. | |
24 | ?C:. | |
25 | ?H:#$d_ldbl_dig HAS_LDBL_DIG /* */ | |
26 | ?H:. | |
41322e17 | 27 | ?F:!ldbl_dig.c |
7996fb80 JH |
28 | ?LINT:set d_ldbl_dig |
29 | : See if number of significant digits in a double precision number is known | |
30 | echo " " | |
31 | $cat >ldbl_dig.c <<EOM | |
32 | #$i_limits I_LIMITS | |
33 | #$i_float I_FLOAT | |
34 | #ifdef I_LIMITS | |
35 | #include <limits.h> | |
36 | #endif | |
37 | #ifdef I_FLOAT | |
38 | #include <float.h> | |
39 | #endif | |
40 | #ifdef LDBL_DIG | |
41 | printf("Contains LDBL_DIG"); | |
42 | #endif | |
43 | EOM | |
44 | $cppstdin $cppflags $cppminus < ldbl_dig.c >ldbl_dig.E 2>/dev/null | |
45 | if $contains 'LDBL_DIG' ldbl_dig.E >/dev/null 2>&1; then | |
46 | echo "LDBL_DIG found." >&4 | |
47 | val="$define" | |
48 | else | |
49 | echo "LDBL_DIG NOT found." >&4 | |
50 | val="$undef" | |
51 | fi | |
52 | $rm -f ldbl_dig.? | |
53 | set d_ldbl_dig | |
54 | eval $setvar | |
55 |