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1 | #!/bin/sh |
2 | # SPDX-License-Identifier: GPL-2.0 | |
3 | # | |
2f7ab126 | 4 | # Print the C compiler name and its version in a 5 or 6-digit form. |
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5 | # Also, perform the minimum version check. |
6 | ||
7 | set -e | |
8 | ||
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9 | # Print the C compiler name and some version components. |
10 | get_c_compiler_info() | |
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11 | { |
12 | cat <<- EOF | "$@" -E -P -x c - 2>/dev/null | |
13 | #if defined(__clang__) | |
14 | Clang __clang_major__ __clang_minor__ __clang_patchlevel__ | |
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15 | #elif defined(__GNUC__) |
16 | GCC __GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__ | |
17 | #else | |
18 | unknown | |
19 | #endif | |
20 | EOF | |
21 | } | |
22 | ||
23 | # Convert the version string x.y.z to a canonical 5 or 6-digit form. | |
24 | get_canonical_version() | |
25 | { | |
26 | IFS=. | |
27 | set -- $1 | |
28 | echo $((10000 * $1 + 100 * $2 + $3)) | |
29 | } | |
30 | ||
31 | # $@ instead of $1 because multiple words might be given, e.g. CC="ccache gcc". | |
32 | orig_args="$@" | |
2f7ab126 | 33 | set -- $(get_c_compiler_info "$@") |
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34 | |
35 | name=$1 | |
36 | ||
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37 | min_tool_version=$(dirname $0)/min-tool-version.sh |
38 | ||
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39 | case "$name" in |
40 | GCC) | |
41 | version=$2.$3.$4 | |
e24b3ffc | 42 | min_version=$($min_tool_version gcc) |
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43 | ;; |
44 | Clang) | |
45 | version=$2.$3.$4 | |
e24b3ffc | 46 | min_version=$($min_tool_version llvm) |
aec6c60a | 47 | ;; |
aec6c60a | 48 | *) |
2f7ab126 | 49 | echo "$orig_args: unknown C compiler" >&2 |
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50 | exit 1 |
51 | ;; | |
52 | esac | |
53 | ||
54 | cversion=$(get_canonical_version $version) | |
55 | min_cversion=$(get_canonical_version $min_version) | |
56 | ||
57 | if [ "$cversion" -lt "$min_cversion" ]; then | |
58 | echo >&2 "***" | |
2f7ab126 | 59 | echo >&2 "*** C compiler is too old." |
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60 | echo >&2 "*** Your $name version: $version" |
61 | echo >&2 "*** Minimum $name version: $min_version" | |
62 | echo >&2 "***" | |
63 | exit 1 | |
64 | fi | |
65 | ||
66 | echo $name $cversion |