configure, meson: detect Rust toolchain
Include the correct path and arguments to rustc in the native
and cross files (native compilation is needed for procedural
macros).
Based on the host architecture and OS, the compiler and optionally the argument
to --cpu, the Rust target triple can be detected automatically for either a
native or a cross compiler.
In general, it is only a matter of translating the architecture and OS, and
adding a machine to form the triple, but there are some special cases (e.g.
detecting soft vs. hard floating point on ARM) and some inconsistencies.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Link: https://lore.kernel.org/r/207d2640b32d511e9c27478ce3192f5bb0bf3169.1727961605.git.manos.pitsidianakis@linaro.org
[Leave disabled by default until CI covers the Rust code on supported
distros. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/configure b/configure
index aa7aae7..e832f21 100755
--- a/configure
+++ b/configure
@@ -207,6 +207,8 @@
;;
--objcc=*) objcc="$optarg"
;;
+ --rustc=*) RUSTC="$optarg"
+ ;;
--cpu=*) cpu="$optarg"
;;
--extra-cflags=*)
@@ -252,6 +254,8 @@
download="enabled"
skip_meson=no
use_containers="yes"
+rust="disabled"
+rust_target_triple=""
gdb_bin=$(command -v "gdb-multiarch" || command -v "gdb")
gdb_arches=""
@@ -310,6 +314,7 @@
ld="${LD-${cross_prefix}ld}"
ranlib="${RANLIB-${cross_prefix}ranlib}"
nm="${NM-${cross_prefix}nm}"
+readelf="${READELF-${cross_prefix}readelf}"
strip="${STRIP-${cross_prefix}strip}"
widl="${WIDL-${cross_prefix}widl}"
windres="${WINDRES-${cross_prefix}windres}"
@@ -317,6 +322,8 @@
pkg_config="${PKG_CONFIG-${cross_prefix}pkg-config}"
sdl2_config="${SDL2_CONFIG-${cross_prefix}sdl2-config}"
+rustc="${RUSTC-rustc}"
+
check_define() {
cat > $TMPC <<EOF
#if !defined($1)
@@ -425,6 +432,7 @@
# Please keep it sorted and synchronized with meson.build's host_arch.
host_arch=
linux_arch=
+raw_cpu=$cpu
case "$cpu" in
aarch64)
host_arch=aarch64
@@ -658,6 +666,8 @@
;;
--objcc=*)
;;
+ --rustc=*)
+ ;;
--make=*)
;;
--install=*)
@@ -777,8 +787,14 @@
;;
--container-engine=*) container_engine="$optarg"
;;
+ --rust-target-triple=*) rust_target_triple="$optarg"
+ ;;
--gdb=*) gdb_bin="$optarg"
;;
+ --enable-rust) rust=enabled
+ ;;
+ --disable-rust) rust=disabled
+ ;;
# everything else has the same name in configure and meson
--*) meson_option_parse "$opt" "$optarg"
;;
@@ -881,6 +897,7 @@
at build time [$host_cc]
--cxx=CXX use C++ compiler CXX [$cxx]
--objcc=OBJCC use Objective-C compiler OBJCC [$objcc]
+ --rustc=RUSTC use Rust compiler RUSTC [$rustc]
--extra-cflags=CFLAGS append extra C compiler flags CFLAGS
--extra-cxxflags=CXXFLAGS append extra C++ compiler flags CXXFLAGS
--extra-objcflags=OBJCFLAGS append extra Objective C compiler flags OBJCFLAGS
@@ -891,8 +908,9 @@
--python=PYTHON use specified python [$python]
--ninja=NINJA use specified ninja [$ninja]
--static enable static build [$static]
- --without-default-features default all --enable-* options to "disabled"
- --without-default-devices do not include any device that is not needed to
+ --rust-target-triple=TRIPLE compilation target for Rust code [autodetect]
+ --without-default-features default all --enable-* options to "disabled"
+ --without-default-devices do not include any device that is not needed to
start the emulator (only use if you are including
desired devices in configs/devices/)
--with-devices-ARCH=NAME override default configs/devices
@@ -1167,6 +1185,132 @@
fi
##########################################
+# detect rust triple
+
+if test "$rust" != disabled && has "$rustc" && $rustc -vV > "${TMPDIR1}/${TMPB}.out"; then
+ rust_host_triple=$(sed -n 's/^host: //p' "${TMPDIR1}/${TMPB}.out")
+else
+ if test "$rust" = enabled; then
+ error_exit "could not execute rustc binary \"$rustc\""
+ fi
+ rust=disabled
+fi
+if test "$rust" != disabled && test -z "$rust_target_triple"; then
+ # arch and os generally matches between meson and rust
+ rust_arch=$host_arch
+ rust_os=$host_os
+ rust_machine=unknown
+ rust_osvariant=
+
+ # tweak rust_os if needed; also, machine and variant depend on the OS
+ android=no
+ case "$host_os" in
+ darwin)
+ # e.g. aarch64-apple-darwin
+ rust_machine=apple
+ ;;
+
+ linux)
+ # detect android/glibc/musl
+ if check_define __ANDROID__; then
+ rust_osvariant=android
+ android=yes
+ else
+ cat > $TMPC << EOF
+#define _GNU_SOURCE
+#include <features.h>
+#ifndef __USE_GNU
+error using musl
+#endif
+EOF
+ if compile_object; then
+ rust_osvariant=gnu
+ else
+ rust_osvariant=musl
+ fi
+ fi
+
+ case "$host_arch" in
+ arm)
+ # e.g. arm-unknown-linux-gnueabi, arm-unknown-linux-gnueabihf
+ write_c_skeleton
+ compile_object
+ if $READELF -A $TMPO | grep Tag_API_VFP_args: > /dev/null; then
+ rust_osvariant=${rust_osvariant}eabihf
+ else
+ rust_osvariant=${rust_osvariant}eabi
+ fi
+ ;;
+
+ mips64)
+ # e.g. mips64-unknown-linux-gnuabi64
+ rust_osvariant=${rust_osvariant}abi64
+ ;;
+ esac
+ ;;
+
+ netbsd)
+ # e.g. arm-unknown-netbsd-eabihf
+ test "$host_arch" = arm && rust_osvariant=eabihf
+ ;;
+
+ sunos)
+ rust_machine=pc
+ rust_os=solaris
+ ;;
+
+ windows)
+ # e.g. aarch64-pc-windows-gnullvm, x86_64-pc-windows-gnu (MSVC not supported)
+ rust_machine=pc
+ if test "$host_arch" = aarch64; then
+ rust_osvariant=gnullvm
+ else
+ rust_osvariant=gnu
+ fi
+ ;;
+ esac
+
+ # now tweak the architecture part, possibly based on pre-canonicalization --cpu
+ case "$host_arch" in
+ arm)
+ # preserve ISA version (armv7 etc.) from $raw_cpu if passed via --cpu
+ rust_arch=$raw_cpu
+ test "$rust_arch" = arm && test "$rust_os" != linux && rust_arch=armv7
+ ;;
+
+ mips|mips64)
+ # preserve ISA version (mipsisa64r6 etc.) and include endianness
+ rust_arch=${raw_cpu%el}
+ test "$bigendian" = no && rust_arch=${rust_arch}el
+ ;;
+
+ riscv32|riscv64)
+ # e.g. riscv64gc-unknown-linux-gnu, but riscv64-linux-android
+ test "$android" = no && rust_arch=${rust_arch}gc
+ ;;
+
+ sparc64)
+ if test "$rust_os" = solaris; then
+ rust_arch=sparcv9
+ rust_machine=sun
+ fi
+ ;;
+
+ x86_64)
+ # e.g. x86_64-unknown-linux-gnux32
+ test "$raw_cpu" = x32 && rust_osvariant=${rust_osvariant}x32
+ ;;
+ esac
+
+ if test "$android" = yes; then
+ # e.g. aarch64-linux-android
+ rust_target_triple=$rust_arch-$rust_os-$rust_osvariant
+ else
+ rust_target_triple=$rust_arch-$rust_machine-$rust_os${rust_osvariant:+-$rust_osvariant}
+ fi
+fi
+
+##########################################
# functions to probe cross compilers
container="no"
@@ -1628,6 +1772,9 @@
echo "RUNC=$runc" >> $config_host_mak
fi
echo "SUBDIRS=$subdirs" >> $config_host_mak
+if test "$rust" != disabled; then
+ echo "RUST_TARGET_TRIPLE=$rust_target_triple" >> $config_host_mak
+fi
echo "PYTHON=$python" >> $config_host_mak
echo "MKVENV_ENSUREGROUP=$mkvenv ensuregroup $mkvenv_online_flag" >> $config_host_mak
echo "GENISOIMAGE=$genisoimage" >> $config_host_mak
@@ -1764,12 +1911,20 @@
echo "c = [$(meson_quote $cc $CPU_CFLAGS)]" >> $cross
test -n "$cxx" && echo "cpp = [$(meson_quote $cxx $CPU_CFLAGS)]" >> $cross
test -n "$objcc" && echo "objc = [$(meson_quote $objcc $CPU_CFLAGS)]" >> $cross
+ if test "$rust" != disabled; then
+ if test "$rust_host_triple" != "$rust_target_triple"; then
+ echo "rust = [$(meson_quote $rustc --target "$rust_target_triple")]" >> $cross
+ else
+ echo "rust = [$(meson_quote $rustc)]" >> $cross
+ fi
+ fi
echo "ar = [$(meson_quote $ar)]" >> $cross
echo "dlltool = [$(meson_quote $dlltool)]" >> $cross
echo "nm = [$(meson_quote $nm)]" >> $cross
echo "pkgconfig = [$(meson_quote $pkg_config)]" >> $cross
echo "pkg-config = [$(meson_quote $pkg_config)]" >> $cross
echo "ranlib = [$(meson_quote $ranlib)]" >> $cross
+ echo "readelf = [$(meson_quote $readelf)]" >> $cross
if has $sdl2_config; then
echo "sdl2-config = [$(meson_quote $sdl2_config)]" >> $cross
fi
@@ -1799,6 +1954,9 @@
echo "# Automatically generated by configure - do not modify" > $native
echo "[binaries]" >> $native
echo "c = [$(meson_quote $host_cc)]" >> $native
+ if test "$rust" != disabled; then
+ echo "rust = [$(meson_quote $rustc)]" >> $cross
+ fi
mv $native config-meson.native
meson_option_add --native-file
meson_option_add config-meson.native
@@ -1817,6 +1975,7 @@
test "$pie" = no && meson_option_add -Db_pie=false
# QEMU options
+ test "$rust" != "auto" && meson_option_add "-Drust=$rust"
test "$cfi" != false && meson_option_add "-Dcfi=$cfi" "-Db_lto=$cfi"
test "$docs" != auto && meson_option_add "-Ddocs=$docs"
test -n "${LIB_FUZZING_ENGINE+xxx}" && meson_option_add "-Dfuzzing_engine=$LIB_FUZZING_ENGINE"
diff --git a/meson.build b/meson.build
index 93ddaef..f76f01f 100644
--- a/meson.build
+++ b/meson.build
@@ -4325,8 +4325,9 @@
endif
summary_info += {'Rust support': have_rust}
if have_rust
- summary_info += {'rustc version': rustc.version()}
- summary_info += {'rustc': ' '.join(rustc.cmd_array())}
+ summary_info += {'rustc version': rustc.version()}
+ summary_info += {'rustc': ' '.join(rustc.cmd_array())}
+ summary_info += {'Rust target': config_host['RUST_TARGET_TRIPLE']}
endif
option_cflags = (get_option('debug') ? ['-g'] : [])
if get_option('optimization') != 'plain'
