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|
#!/bin/sh
fail() {
echo "$0: $*" >&2
exit 1
}
prefix=/usr/local
bindir='$(PREFIX)/bin'
host=
target=
gcclibdir=
for arg ; do
case "$arg" in
--prefix=*) prefix=${arg#*=} ;;
--bindir=*) bindir=${arg#*=} ;;
--host=*) host=${arg#*=} ;;
--target=*) target=${arg#*=} ;;
--with-cpp=*) DEFAULT_PREPROCESSOR=${arg#*=} ;;
--with-qbe=*) DEFAULT_QBE=${arg#*=} ;;
--with-as=*) DEFAULT_ASSEMBLER=${arg#*=} ;;
--with-ld=*) DEFAULT_LINKER=${arg#*=} ;;
--with-ldso=*) DEFAULT_DYNAMIC_LINKER=${arg#*=} ;;
--with-gcc-libdir=*) gcclibdir=${arg#*=} ;;
CC=*) CC=${arg#*=} ;;
CFLAGS=*) CFLAGS=${arg#*=} ;;
LDFLAGS=*) LDFLAGS=${arg#*=} ;;
*) fail "unknown option '$arg'"
esac
done
: ${CC:=cc}
printf 'checking host system type... '
test -n "$host" || host=$($CC -dumpmachine 2>/dev/null) || fail "could not determine host"
printf '%s\n' "$host"
printf 'checking target system type... '
test -n "$target" || target=$host
printf '%s\n' "$target"
toolprefix=
if [ "$host" != "$target" ] ; then
toolprefix=$target-
fi
startfiles=0
endfiles=0
defines=
linkflags=
case "$target" in
*-linux-*musl*)
test "${DEFAULT_DYNAMIC_LINKER+set}" || case "$target" in
x86_64*) DEFAULT_DYNAMIC_LINKER=/lib/ld-musl-x86_64.so.1 ;;
aarch64*) DEFAULT_DYNAMIC_LINKER=/lib/ld-musl-aarch64.so.1 ;;
riscv64*) DEFAULT_DYNAMIC_LINKER=/lib/ld-musl-riscv64.so.1 ;;
*) fail "unsuported target '$target'"
esac
startfiles='"-l", ":crt1.o", "-l", ":crti.o"'
endfiles='"-l", "c", "-l", ":crtn.o"'
;;
*-linux-*gnu*)
test "${DEFAULT_DYNAMIC_LINKER+set}" || case "$target" in
x86_64*) DEFAULT_DYNAMIC_LINKER=/lib64/ld-linux-x86-64.so.2 ;;
aarch64*) DEFAULT_DYNAMIC_LINKER=/lib/ld-linux-aarch64.so.1 ;;
riscv64*) DEFAULT_DYNAMIC_LINKER=/lib/ld-linux-riscv64-lp64d.so.1 ;;
*) fail "unsuported target '$target'"
esac
startfiles='"-l", ":crt1.o", "-l", ":crti.o", "-l", ":crtbegin.o"'
endfiles='"-l", "c", "-l", ":crtend.o", "-l", ":crtn.o"'
if [ -z "$gcclibdir" ] ; then
test "$host" = "$target" || fail "gcc libdir must be specified when building a cross-compiler"
crtbegin=$($CC -print-file-name=crtbegin.o 2>/dev/null)
gcclibdir=${crtbegin%/*}
fi
linkflags='"-L", "'$gcclibdir'",'
;;
*-*freebsd*)
: ${DEFAULT_DYNAMIC_LINKER:=/libexec/ld-elf.so.1}
startfiles='"-l", ":crt1.o", "-l", ":crti.o"'
endfiles='"-l", "c", "-l", ":crtn.o"'
linkflags='"-L", "/usr/lib",'
defines='
"-D", "_Pragma(x)=",
"-D", "_Nullable=",
"-D", "_Nonnull=",
"-D", "__GNUCLIKE_BUILTIN_STDARG",
"-D", "__GNUCLIKE_BUILTIN_VARARGS",
/* required to define _RuneLocale, needed by xlocale/_ctype.h */
"-D", "_USE_CTYPE_INLINE_",
/* workaround for #42 */
"-D", "_XLOCALE_INLINE=static inline",
/* used like attribute after declarator, so _Alignas will not work here */
"-D", "__aligned(x)=",
/* TLS is not yet supported (#8) */
"-D", "__NO_TLS",
/* disable warnings for redefining _Pragma */
"-Wno-builtin-macro-redefined",
'
;;
*-*openbsd*)
: ${DEFAULT_DYNAMIC_LINKER:=/usr/libexec/ld.so}
test "$host" = "$target" && : ${DEFAULT_PREPROCESSOR:=/usr/libexec/cpp}
startfiles='"-l", ":crt0.o", "-l", ":crtbegin.o"'
endfiles='"-l", "c", "-l", ":crtend.o"'
linkflags='"-L", "/usr/lib", "-nopie",'
defines='
/* required to prevent libc headers from declaring functions with conflicting linkage */
"-D", "_ANSI_LIBRARY",
/* used like attribute after declarator, so _Alignas will not work here */
"-D", "__aligned(x)=",
'
;;
*-*netbsd*)
: ${DEFAULT_DYNAMIC_LINKER:=/usr/libexec/ld.elf_so}
startfiles='"-l", ":crt0.o", "-l", ":crti.o"'
endfiles='"-l", "c", "-l", ":crtn.o"'
defines='"-D", "__builtin_stdarg_start(ap, last)=__builtin_va_start(ap, last)"'
;;
*)
fail "unknown target '$target', please create config.h manually"
esac
: ${DEFAULT_PREPROCESSOR:=${toolprefix}cpp}
: ${DEFAULT_QBE:=qbe}
: ${DEFAULT_ASSEMBLER:=${toolprefix}as}
: ${DEFAULT_LINKER:=${toolprefix}ld}
test "$DEFAULT_DYNAMIC_LINKER" && linkflags=$linkflags' "--dynamic-linker", "'$DEFAULT_DYNAMIC_LINKER'"'
printf "creating config.h... "
cat >config.h <<EOF
static const char target[] = "$target";
static const char *const startfiles[] = {$startfiles};
static const char *const endfiles[] = {$endfiles};
static const char *const preprocesscmd[] = {
"$DEFAULT_PREPROCESSOR",
/* clear preprocessor GNU C version */
"-U", "__GNUC__",
"-U", "__GNUC_MINOR__",
/* we don't yet support these optional features */
"-D", "__STDC_NO_ATOMICS__",
"-D", "__STDC_NO_COMPLEX__",
"-D", "__STDC_NO_VLA__",
"-U", "__SIZEOF_INT128__",
/* we don't generate position-independent code */
"-U", "__PIC__",
/* ignore extension markers */
"-D", "__extension__=",
$defines};
static const char *const codegencmd[] = {"$DEFAULT_QBE"};
static const char *const assemblecmd[] = {"$DEFAULT_ASSEMBLER"};
static const char *const linkcmd[] = {"$DEFAULT_LINKER", $linkflags};
EOF
echo done
printf "creating config.mk... "
cat >config.mk <<EOF
PREFIX=$prefix
BINDIR=$bindir
CC=${CC:-cc}
CFLAGS=${CFLAGS:--std=c99 -Wall -Wpedantic -Wno-parentheses -Wno-switch -g -pipe}
LDFLAGS=$LDFLAGS
EOF
echo done
|
