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|
#!/bin/sh
die() {
echo "$0: Error: $@" >&2
exit 1
}
prihelp() {
host="[$(cc -dumpmachine)]"
: ${host:=""}
cat << EOF
Usage: $0 [options]
Options:
--help Print this help mesage
--host=target-triple $host
--cc=cc C compiler [cc]
--prefix=PREFIX Installation path [/usr/local]
--sysroot=/path System root [/usr]
--includedir="/a/b",... System include dirs
EOF
}
sysroot=/usr
prefix=/usr/local
host=
for arg ; do
case "$arg" in
--host=*) host=${arg#*=} ;;
--sysroot=*) sysroot=${arg#*=} ;;
--includedir=*) host_include_dirs=${arg#*=} ;;
CC=*) CC=${arg#*=} ;;
--cc=*) CC=${arg#*=} ;;
CFLAGS=*) CFLAGS=${arg#*=} ;;
--cflags=*) CFLAGS=${arg#*=} ;;
--prefix=*) prefix=$(sh -c "echo ${arg#*=}") ;;
--help) prihelp ; exit ;;
*) die "$0: unknown option '$arg'"
esac
done
: ${CC:=cc}
: ${host:=$($CC -dumpmachine)}
test -n "$host" || die "cannot determine host"
host_arch=
host_os=
host_abi=
host_predefs=
echo "host: $host"
case "$host" in
x86_64-*) host_arch=x86_64 ;;
amd64-*) host_arch=x86_64 ;;
aarch64-*) host_arch=aarch64 ;;
arm64-*) host_arch=aarch64 ;;
*) host_arch=unk ;;
esac
case "$host" in
*-linux-*)
host_os=linux ;;
*-openbsd*)
host_os=openbsd
host_predefs='
"_ANSI_LIBRARY", /* works around __only_inline functions in libc headers */
'
;;
*) host_os=unknown ;;
esac
case "$host" in
*-gnu) host_abi=gnu ;;
*-musl) host_abi=musl ;;
*) host_abi=none ;;
esac
tryincldir() {
if stat "$1"/ >/dev/null 2>/dev/null; then
host_include_dirs="$host_include_dirs\"$1\","
fi
}
if ! test -n "$host_include_dirs"; then
# try to query host toolchain first
if hostccdirs=$($CC -E -v -xc /dev/null 2>&1 | sed -n '/#include <...> search starts here:/,/End of search list./{
s/^[[:space:]]*//
/^\/.*/p
}') && test -n "$hostccdirs"; then
echo "Using $CC's system include paths:"
for d in $hostccdirs; do
dir=$(realpath "$d")
case "$dir" in
#exclude internal compiler headers, we have our own
*/gcc/*) ;; */clang/*) ;;
*) echo " $dir"
tryincldir "$dir" ;;
esac
done
else
echo "Falling back to generic system include paths"
tryincldir "$sysroot/local/include/$host"
tryincldir "$sysroot/local/include"
tryincldir "$sysroot/include/$host"
tryincldir "$sysroot/include"
fi
fi
set -e
echo using arch: "$host_arch"
echo using os: "$host_os"
echo using abi: "$host_abi"
echo host include paths: "$host_include_dirs"
echo "/** GENERATED WITH $0 $@ **/
#define HOST_TRIPLE \"$host\"
#define HOST_ARCH IS$host_arch
#define HOST_OS OS$host_os
#define HOST_ABI ABI$host_abi
#define HOST_INCLUDE_DIRS $host_include_dirs
#define HOST_CC \"$CC\"
static const char *const host_predefs[] = {$host_predefs 0
};
" > src/hostconfig.h
echo "# GENERATED WITH $0 $@
PREFIX = $prefix
CC = $CC
CFLAGS = ${CFLAGS:--Wall -std=c11 -pedantic}" > config.mk
echo config written to src/hostconfig.h, config.mk
|
