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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 $host
--cc=cc C compiler [cc]
--ld=ld Linker [ld]
--prefix=PREFIX Installation path [/usr/local]
--sysroot=/path System root []
--includedir="/a/b",... System include dirs
EOF
}
sysroot=
prefix=/usr/local
host=
linker=
for arg ; do
case "$arg" in
--host=*) host=${arg#*=} ;;
--sysroot=*) sysroot=${arg#*=} ;;
--includedir=*) host_include_dirs=${arg#*=} ;;
CC=*) CC=${arg#*=} ;;
--cc=*) CC=${arg#*=} ;;
--ld=*) linker=${arg#*=} ;;
CFLAGS=*) CFLAGS=${arg#*=} ;;
--cflags=*) CFLAGS=${arg#*=} ;;
--prefix=*) prefix=$(sh -c "echo ${arg#*=}") ;;
--help) prihelp ; exit ;;
*) die "$0: unknown option '$arg'"
esac
done
: ${CC:=cc}
if ! test -n "$host"; then
host=$($CC -dumpmachine)
else
# try target-triple-ld (cross compiling)
if ! test -n "$linker" && command -v "$host"-ld >/dev/null; then
linker="$host"-ld
sysroot=$( ($host-cc -print-sysroot || $host-gcc -print-sysroot) 2>/dev/null)
fi
fi
: ${linker:=ld}
test -n "$host" || die "cannot determine host"
host_arch=
host_os=unknown
host_abi=none
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 ;;
*) die "unsupported target '$host'"
esac
linkflags=
findgcclibdir () {
: ${GCCLIBDIR:=$(dirname $( ("$host"-gcc -print-file-name=crtbegin.o || $CC -print-file-name=crtbegin.o) 2>/dev/null) )}
if ! test -n $GCCLIBDIR; then
die "cannot determine gcclibdir"
fi
}
link_with_cc=0
case "$host" in
*-linux-*gnu*)
host_os=linux
host_abi=gnu
case $host_arch in
x86_64) DYNAMIC_LINKER=$sysroot/lib64/ld-linux-x86-64.so.2 ;;
aarch64) DYNAMIC_LINKER=$sysroot/lib/ld-linux-aarch64.so.1
esac
ldstartfiles='"-l:crt1.o", "-l:crti.o", "-l:crtbegin.o"'
ldendfiles='"-lc", "-l:crtend.o", "-l:crtn.o"'
ldstartfiles_pie='"-l:Scrt1.o", "-l:crti.o", "-l:crtbeginS.o"'
ldendfiles_pie='"-lc", "-l:crtendS.o", "-l:crtn.o"'
findgcclibdir
linkflags='"-L", "'$GCCLIBDIR'",'
host_predefs=''
;;
*-linux-*musl*)
host_os=linux
host_abi=musl
case $host_arch in
x86_64) DYNAMIC_LINKER=$sysroot/lib/ld-musl-x86_64.so.1 ;;
aarch64) DYNAMIC_LINKER=$sysroot/lib/ld-linux-aarch64.so.1 ;;
esac
if test -d $sysroot/usr/lib/musl/lib; then
# musl cross compiler in glibc system (probably)
findgcclibdir
linkflags='"-nostdlib", "-L", "'$sysroot'/usr/lib/musl/lib", "-L", "'$GCCLIBDIR'",'
ldstartfiles='"'$sysroot'/usr/lib/musl/lib/crt1.o","'$sysroot'/usr/lib/musl/lib/crti.o", "-l:crtbeginS.o"'
ldendfiles='"-lc", "-l:crtendS.o", "'$sysroot'/usr/lib/musl/lib/crtn.o"'
ldstartfiles_pie='"'$sysroot'/usr/lib/musl/lib/Scrt1.o", "'$sysroot'/usr/lib/musl/lib/crti.o", "-l:crtbeginS.o"'
ldendfiles_pie="$ldendfiles"
else
ldstartfiles='"-l:crt1.o", "-l:crti.o"'
ldendfiles='"-lc", "-l:crtn.o"'
ldstartfiles_pie='"-l:Scrt1.o", "-l:crti.o"'
ldendfiles_pie="$ldendfiles"
fi
;;
*-openbsd*)
host_os=openbsd
DYNAMIC_LINKER=$sysroot/usr/libexec/ld.so
ldstartfiles='"-l:crt0.o", "-l:crtbegin.o"'
ldendfiles='"-lc", "-l:crtend.o"'
ldstartfiles_pie="$ldstartfiles"
ldendfiles_pie="$ldendfiles"
linkflags='"-L'$sysroot'/usr/lib"'
host_predefs='
"_ANSI_LIBRARY", /* works around __only_inline functions in libc headers */
'
;;
*)
link_with_cc=1
echo "warning: unknown/unsupported target '$host'" >&2
esac
echo dynamic linker: $DYNAMIC_LINKER
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
for sfx in cc gcc; do
if command -v "$host"-$sfx > /dev/null; then
cc="$host"-$sfx
fi
done
: ${cc:=$CC}
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 "$sysroot/usr/local/include/$host"
tryincldir "$sysroot/usr/local/include"
tryincldir "$sysroot/usr/include/$host"
tryincldir "$sysroot/usr/include"
fi
fi
set -e
echo using linker: "$linker"
echo using arch: "$host_arch"
echo using os: "$host_os"
echo using abi: "$host_abi"
echo host include paths: "$host_include_dirs"
if test -n "$DYNAMIC_LINKER"; then
linkflags="\"--dynamic-linker=$DYNAMIC_LINKER\", $linkflags"
fi
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 $host_include_dirs
#define HOST_LD \"$linker\"
#define HOST_CC \"$CC\"
static const char *const host_predefs[] = {$host_predefs 0
};
#define HOST_LINK_WITH_CC $link_with_cc
static const char *const host_linkcmd[] = {${linkflags:=0}};
static const char *const host_ldstartfiles[] = {${ldstartfiles:=0}};
static const char *const host_ldendfiles[] = {${ldendfiles:=0}};
static const char *const host_ldstartfiles_pie[] = {${ldstartfiles_pie:=0}};
static const char *const host_ldendfiles_pie[] = {${ldendfiles_pie:=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
|
