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060e6f4d21
The logic in this script was *intended* to use the system's default compiler if it was sufficiently new, and only start searching for the latest installed if the default was not suitable. However, the `cxx` program does not exist on Unixes, so the version check always failed. We should be using the standard `c++` program name instead. After this change, the `CC` and `CXX` environment variables will have to be used if someone wants to force a newer compiler version.
78 lines
2.3 KiB
Bash
78 lines
2.3 KiB
Bash
# shellcheck shell=bash
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HOST_COMPILER=""
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is_supported_compiler() {
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local COMPILER="$1"
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if [ -z "$COMPILER" ]; then
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return 1
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fi
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local VERSION=""
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VERSION="$($COMPILER -dumpversion 2> /dev/null)" || return 1
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local MAJOR_VERSION=""
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MAJOR_VERSION="${VERSION%%.*}"
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if $COMPILER --version 2>&1 | grep "Apple clang" >/dev/null; then
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# Apple Clang version check
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BUILD_VERSION=$(echo | $COMPILER -dM -E - | grep __apple_build_version__ | cut -d ' ' -f3)
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# Xcode 14.3, based on upstream LLVM 15
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[ "$BUILD_VERSION" -ge 14030022 ] && return 0
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elif $COMPILER --version 2>&1 | grep "clang" >/dev/null; then
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# Clang version check
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[ "$MAJOR_VERSION" -ge 17 ] && return 0
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else
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# GCC version check
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[ "$MAJOR_VERSION" -ge 13 ] && return 0
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fi
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return 1
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}
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find_newest_compiler() {
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local BEST_VERSION=0
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local BEST_CANDIDATE=""
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for CANDIDATE in "$@"; do
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if ! command -v "$CANDIDATE" >/dev/null 2>&1; then
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continue
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fi
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if ! $CANDIDATE -dumpversion >/dev/null 2>&1; then
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continue
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fi
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local VERSION=""
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VERSION="$($CANDIDATE -dumpversion)"
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local MAJOR_VERSION="${VERSION%%.*}"
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if [ "$MAJOR_VERSION" -gt "$BEST_VERSION" ]; then
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BEST_VERSION=$MAJOR_VERSION
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BEST_CANDIDATE="$CANDIDATE"
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fi
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done
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HOST_COMPILER=$BEST_CANDIDATE
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}
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pick_host_compiler() {
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CC=${CC:-"cc"}
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CXX=${CXX:-"c++"}
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if is_supported_compiler "$CC" && is_supported_compiler "$CXX"; then
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return
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fi
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find_newest_compiler clang clang-17 clang-18 /opt/homebrew/opt/llvm/bin/clang
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if is_supported_compiler "$HOST_COMPILER"; then
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export CC="${HOST_COMPILER}"
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export CXX="${HOST_COMPILER/clang/clang++}"
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return
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fi
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find_newest_compiler egcc gcc gcc-13 gcc-14 /usr/local/bin/gcc-{13,14} /opt/homebrew/bin/gcc-{13,14}
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if is_supported_compiler "$HOST_COMPILER"; then
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export CC="${HOST_COMPILER}"
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export CXX="${HOST_COMPILER/gcc/g++}"
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return
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fi
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if [ "$(uname -s)" = "Darwin" ]; then
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die "Please make sure that Xcode 14.3, Homebrew Clang 17, or higher is installed."
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else
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die "Please make sure that GCC version 13, Clang version 17, or higher is installed."
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fi
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}
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