81 lines
1.5 KiB
Bash
81 lines
1.5 KiB
Bash
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#!/usr/bin/env bash
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set -e
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function err()
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{
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echo "$@" >&2
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}
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function usage()
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{
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err "Detect compiler and linker versions, generate mk/cc.mk"
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err ""
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err "Usage: ./detect_cc.sh [OPTION]..."
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err ""
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err "Defaults for the options are specified in brackets."
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err ""
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err "General:"
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err " -h, --help Display this help and exit"
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err " --cc=path C compiler to use"
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err " --cxx=path C++ compiler to use"
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err " --lto=[y|n] Attempt to configure for LTO"
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}
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CC=cc
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CXX=c++
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LTO=n
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for i in "$@"; do
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case "$i" in
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-h|--help)
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usage
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exit 0
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;;
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--cc=*)
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CC="${i#*=}"
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;;
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--cxx=*)
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CXX="${i#*=}"
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;;
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--lto=*)
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LTO="${i#*=}"
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;;
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--)
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break
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;;
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*)
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err "Unrecognized option $i"
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usage
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exit 1
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esac
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done
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CC_TYPE=$($CC -v 2>&1 | grep version | awk '{print $1}')
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CXX_TYPE=$($CXX -v 2>&1 | grep version | awk '{print $1}')
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LD_TYPE=$(ld -v 2>&1 | awk '{print $2}')
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if [ "$CC_TYPE" != "$CXX_TYPE" ]; then
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err "C compiler is $CC_TYPE but C++ compiler is $CXX_TYPE"
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err "This may result in errors"
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exit 1
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fi
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CCAR="ar"
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if [ "$LTO" = "y" ]; then
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if [ "$CC_TYPE" = "clang" ]; then
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if [ "$LD_TYPE" != "gold" ]; then
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err "Using LTO with clang requires the gold linker."
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exit 1
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fi
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CCAR="llvm-ar"
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else
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CCAR="gcc-ar"
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fi
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fi
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echo "CC=$CC"
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echo "CXX=$CXX"
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echo "CCAR=$CCAR"
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