stance to cross-compile v18.x for armv7 (what is the trick) ?

[mtitinger]

Hi There,

may I ask you guys to kindly provide the ./configure stance in order to build v18.x with a armv7 (linux-gnueabi) toolchain ?
I see there is a downloadable armv7 package, so I assume someone got this working,
At this moment, I try with the stance below, but this fails after a long while, trying to compile host code (maybe with -m32 while expecting a 64bits register set?)

So, what is the trick?

Many thanks,
Marc.

I tried with

./configure --without-snapshot  --without-ssl --dest-cpu=arm --dest-os=linux --with-arm-float-abi=hard --without-intl  --prefix="${PREFIX_DIR}" --cross-compiling 

build env is set using a yocto SDK toolchain (sets CC, CXX -mthumb -mfpu=neon -mfloat-abi=hard -mcpu=cortex-a7 sysroot etc...)
so this points to a proper armv7 toochain.

and this fails eventually with :

$ g++ -o /home/marc/node/out/Release/obj.host/v8_base_without_compiler/deps/v8/src/heap/cppgc/gc-info-table.o ../deps/v8/src/heap/cppgc/gc-info-table.cc '-D_GLIBCXX_USE_CXX11_ABI=1' '-DV8_GYP_BUILD' '-DV8_TYPED_ARRAY_MAX_SIZE_IN_HEAP=64' '-D__STDC_FORMAT_MACROS' '-DOPENSSL_NO_PINSHARED' '-DOPENSSL_THREADS' '-DV8_TARGET_ARCH_ARM' '-DCAN_USE_ARMV7_INSTRUCTIONS' '-DCAN_USE_VFP3_INSTRUCTIONS' '-DCAN_USE_VFP32DREGS' '-DV8_HAVE_TARGET_OS' '-DV8_TARGET_OS_LINUX' '-DV8_EMBEDDER_STRING="-node.13"' '-DENABLE_DISASSEMBLER' '-DV8_PROMISE_INTERNAL_FIELD_COUNT=1' '-DOBJECT_PRINT' '-DV8_ATOMIC_OBJECT_FIELD_WRITES' '-DV8_ENABLE_LAZY_SOURCE_POSITIONS' '-DV8_USE_SIPHASH' '-DV8_SHARED_RO_HEAP' '-DV8_WIN64_UNWINDING_INFO' '-DV8_ENABLE_REGEXP_INTERPRETER_THREADED_DISPATCH' '-DV8_SNAPSHOT_COMPRESSION' '-DV8_ENABLE_WEBASSEMBLY' '-DV8_ENABLE_JAVASCRIPT_PROMISE_HOOKS' '-DV8_ALLOCATION_FOLDING' '-DV8_ALLOCATION_SITE_TRACKING' '-DV8_SCRIPTORMODULE_LEGACY_LIFETIME' '-DV8_ADVANCED_BIGINT_ALGORITHMS' '-DUSE_EABI_HARDFLOAT=1' -I../deps/v8 -I../deps/v8/include -I/home/marc/node/out/Release/obj/gen/inspector-generated-output-root -I../deps/v8/third_party/inspector_protocol -I/home/marc/node/out/Release/obj/gen -I/home/marc/node/out/Release/obj/gen/generate-bytecode-output-root -I../deps/v8/third_party/zlib -I../deps/v8/third_party/zlib/google  -pthread -Wno-unused-parameter -Wno-return-type -fno-strict-aliasing -m32 -O3 -fno-omit-frame-pointer -fdata-sections -ffunction-sections -O3 -fno-rtti -fno-exceptions -std=gnu++17 -MMD -MF /home/marc/node/out/Release/.deps//home/marc/node/out/Release/obj.host/v8_base_without_compiler/deps/v8/src/heap/cppgc/gc-info-table.o.d.raw   -c
/tmp/ccvlqciY.s: Assembler messages:
/tmp/ccvlqciY.s:8: Error: bad register name `%rbp'
/tmp/ccvlqciY.s:9: Error: bad register name `%rsp'
/tmp/ccvlqciY.s:11: Error: bad register name `%rbx'
/tmp/ccvlqciY.s:12: Error: bad register name `%r12

[richardlau]

In the Node.js CI we use https://github.com/nodejs/build/blob/master/ansible/roles/docker/files/cc-selector.sh to set CC and CXX to include -march, e.g. -march=armv7-a. (We use that script because different versions of Node.js are compiled with different gcc cross compiling toolchains.)

[mtitinger]

Hi Richard,

thanks a lot! I think my mistake was mainly to not export DESTCPU (relying on --destcpu=arm), and also the flag --with-arm-fpu=neon seems broken.

I was able to get v18.1.0 built with a "zeus" Yocto with the following recipe based on your input. It is still a bit hard-coded and requires more work (the install section and config tuning) but I provide it here in case it can get someone unstuck too.

Thanks and Regards,
Marc.

recipes-devtools/nodejs/nodejs_18.1.0.bb :

SUMMARY = "Node.js is a platform for building fast, scalable network applications."
LICENSE = "Unknown & MIT & ISC & Apache-2.0"
LIC_FILES_CHKSUM = "file://LICENSE;md5=9b5cf99a5928240bc6524cccd2c2da6a \
"

SRC_URI = "git://github.com/nodejs/node.git;protocol=https;branch=v18.x"

#PV = "1.0+git${SRCPV}"
SRCREV = "f35f8a6d75c2d2b2f6b75ee0631c21097f4d9e8e"

S = "${WORKDIR}/git"

inherit pkgconfig

DEPENDS = "openssl zlib"
DEPENDS_class-native = "zlib-native openssl-native"
RDEPENDS_${PN} = "openssl-native openssl"

ARCHFLAGS_arm = "--with-arm-float-abi=hard --dest-cpu=arm"
ARCHFLAGS ?= ""

PACKAGECONFIG = "zlib"

PACKAGECONFIG[ares] = "--shared-cares,,c-ares"
PACKAGECONFIG[brotli] = "--shared-brotli,,brotli"
PACKAGECONFIG[icu] = "--with-intl=system-icu,--without-intl,icu"
PACKAGECONFIG[libuv] = "--shared-libuv,,libuv"
PACKAGECONFIG[nghttp2] = "--shared-nghttp2,,nghttp2"
PACKAGECONFIG[shared] = "--shared"

do_configure () {
	CC_host="${BUILD_CC} -m32" \
	CXX_host="${BUILD_CXX} -m32" \
	./configure --without-dtrace --without-etw --dest-os=linux \
	--shared \
               ${ARCHFLAGS}
}

do_configure_prepend_arm () {
	export ARCH=arml \
	export DESTCPU=arm
}

do_compile () {
	oe_runmake BUILDTYPE=Release
}

do_install () {
	oe_runmake install DESTDIR=${D}
}

BBCLASSEXTEND = "native"