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1 | ## | |
2 | ## This file is part of the PulseView project. | |
3 | ## | |
4 | ## Copyright (C) 2014 Marcus Comstedt <marcus@mc.pp.se> | |
5 | ## | |
6 | ## This program is free software: you can redistribute it and/or modify | |
7 | ## it under the terms of the GNU General Public License as published by | |
8 | ## the Free Software Foundation, either version 2 of the License, or | |
9 | ## (at your option) any later version. | |
10 | ## | |
11 | ## This program is distributed in the hope that it will be useful, | |
12 | ## but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | ## GNU General Public License for more details. | |
15 | ## | |
16 | ## You should have received a copy of the GNU General Public License | |
17 | ## along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | ## | |
19 | ||
20 | include(CheckCSourceRuns) | |
21 | ||
22 | function(memaccess_check_unaligned_le _var) | |
23 | if(NOT CMAKE_CROSSCOMPILING) | |
24 | CHECK_C_SOURCE_RUNS(" | |
25 | #include <stdint.h> | |
26 | int main() { | |
27 | int i; | |
28 | union { uint64_t u64; uint8_t u8[16]; } d; | |
29 | uint64_t v; | |
30 | for (i=0; i<16; i++) | |
31 | d.u8[i] = i; | |
32 | v = *(uint64_t *)(d.u8+1); | |
33 | if (v != 0x0807060504030201ULL) | |
34 | return 1; | |
35 | return 0; | |
36 | }" ${_var}) | |
37 | endif() | |
38 | if(CMAKE_CROSSCOMPILING) | |
39 | message(STATUS "Cross compiling - using portable code for memory access") | |
40 | endif() | |
41 | endfunction() |