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959f3c4c JH |
1 | ?RCS: $Id$ |
2 | ?RCS: | |
3 | ?RCS: Copyright (c) 1999, Jarkko Hietaniemi | |
4c42341b | 4 | ?RCS: |
959f3c4c 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_mmap mmaptype: Inlibc i_sysmman cat cc ccflags | |
12 | ?MAKE: -pick add $@ %< | |
13 | ?S:d_mmap: | |
14 | ?S: This variable conditionally defines HAS_MMAP if mmap() is | |
15 | ?S: available to map a file into memory. | |
16 | ?S:. | |
17 | ?S:mmaptype: | |
18 | ?S: This symbol contains the type of pointer returned by mmap() | |
19 | ?S: (and simultaneously the type of the first argument). | |
20 | ?S: It can be 'void *' or 'caddr_t'. | |
21 | ?S:. | |
22 | ?C:HAS_MMAP: | |
23 | ?C: This symbol, if defined, indicates that the mmap system call is | |
24 | ?C: available to map a file into memory. | |
25 | ?C:. | |
26 | ?C:Mmap_t: | |
27 | ?C: This symbol holds the return type of the mmap() system call | |
28 | ?C: (and simultaneously the type of the first argument). | |
98232925 | 29 | ?C: Usually set to 'void *' or 'caddr_t'. |
959f3c4c JH |
30 | ?C:. |
31 | ?H:#$d_mmap HAS_MMAP /**/ | |
32 | ?H:#define Mmap_t $mmaptype /**/ | |
33 | ?H:. | |
34 | ?LINT:set d_mmap | |
959f3c4c JH |
35 | : see if mmap exists |
36 | set mmap d_mmap | |
37 | eval $inlibc | |
38 | : see what shmat returns | |
39 | : default to something harmless | |
40 | mmaptype='void *' | |
41 | case "$i_sysmman$d_mmap" in | |
42 | "$define$define") | |
43 | $cat >mmap.c <<'END' | |
44 | #include <sys/mman.h> | |
45 | void *mmap(); | |
46 | END | |
47 | if $cc $ccflags -c mmap.c >/dev/null 2>&1; then | |
48 | mmaptype='void *' | |
49 | else | |
50 | mmaptype='caddr_t' | |
51 | fi | |
52 | echo "and it returns ($mmaptype)." >&4 | |
53 | ;; | |
54 | esac | |
55 | ||
56 | ||
57 |