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27e0d4b0 PB |
1 | #!/bin/sh |
2 | # | |
3 | # Copyright (C) 2017 Imagination Technologies | |
4 | # Author: Paul Burton <paul.burton@imgtec.com> | |
5 | # | |
6 | # This program is free software; you can redistribute it and/or modify it | |
7 | # under the terms of the GNU General Public License as published by the | |
8 | # Free Software Foundation; either version 2 of the License, or (at your | |
9 | # option) any later version. | |
10 | # | |
11 | # This script merges configuration fragments for boards supported by the | |
12 | # generic MIPS kernel. It checks each for requirements specified using | |
13 | # formatted comments, and then calls merge_config.sh to merge those | |
14 | # fragments which have no unmet requirements. | |
15 | # | |
16 | # An example of requirements in your board config fragment might be: | |
17 | # | |
18 | # # require CONFIG_CPU_MIPS32_R2=y | |
19 | # # require CONFIG_CPU_LITTLE_ENDIAN=y | |
20 | # | |
21 | # This would mean that your board is only included in kernels which are | |
22 | # configured for little endian MIPS32r2 CPUs, and not for example in kernels | |
23 | # configured for 64 bit or big endian systems. | |
24 | # | |
25 | ||
26 | srctree="$1" | |
27 | objtree="$2" | |
28 | ref_cfg="$3" | |
29 | cfg="$4" | |
30 | boards_origin="$5" | |
31 | shift 5 | |
32 | ||
33 | cd "${srctree}" | |
34 | ||
35 | # Only print Skipping... lines if the user explicitly specified BOARDS=. In the | |
36 | # general case it only serves to obscure the useful output about what actually | |
37 | # was included. | |
38 | case ${boards_origin} in | |
39 | "command line") | |
40 | print_skipped=1 | |
41 | ;; | |
42 | environment*) | |
43 | print_skipped=1 | |
44 | ;; | |
45 | *) | |
46 | print_skipped=0 | |
47 | ;; | |
48 | esac | |
49 | ||
50 | for board in $@; do | |
51 | board_cfg="arch/mips/configs/generic/board-${board}.config" | |
52 | if [ ! -f "${board_cfg}" ]; then | |
53 | echo "WARNING: Board config '${board_cfg}' not found" | |
54 | continue | |
55 | fi | |
56 | ||
57 | # For each line beginning with # require, cut out the field following | |
58 | # it & search for that in the reference config file. If the requirement | |
59 | # is not found then the subshell will exit with code 1, and we'll | |
60 | # continue on to the next board. | |
61 | grep -E '^# require ' "${board_cfg}" | \ | |
62 | cut -d' ' -f 3- | \ | |
63 | while read req; do | |
64 | case ${req} in | |
65 | *=y) | |
66 | # If we require something =y then we check that a line | |
67 | # containing it is present in the reference config. | |
68 | grep -Eq "^${req}\$" "${ref_cfg}" && continue | |
69 | ;; | |
70 | *=n) | |
71 | # If we require something =n then we just invert that | |
72 | # check, considering the requirement met if there isn't | |
73 | # a line containing the value =y in the reference | |
74 | # config. | |
75 | grep -Eq "^${req/%=n/=y}\$" "${ref_cfg}" || continue | |
76 | ;; | |
77 | *) | |
78 | echo "WARNING: Unhandled requirement '${req}'" | |
79 | ;; | |
80 | esac | |
81 | ||
82 | [ ${print_skipped} -eq 1 ] && echo "Skipping ${board_cfg}" | |
83 | exit 1 | |
84 | done || continue | |
85 | ||
86 | # Merge this board config fragment into our final config file | |
87 | ./scripts/kconfig/merge_config.sh \ | |
88 | -m -O ${objtree} ${cfg} ${board_cfg} \ | |
89 | | grep -Ev '^(#|Using)' | |
90 | done |