Can't compile GCC with toolchain built for arm, C++11 error

Message

xhakerek · Post by **xhakerek** » Wed Jan 04, 2023 7:05 pm

Hello,

I have been trying to compile arm installation for a NAS box based on Marvell Kirkwood SoC.
Tried crossdev -S(stable) and without the switch. Toolchain gets compiled finr and then when I try to use it to finish building the system, it errors out on GCC, complaining about C++11:

Here are the commands:

Code: Select all

# crossdev -t armv5tel-softfloat-linux-gnueabi
# armv5tel-softfloat-linux-gnueabi-emerge system -uav
...
checking whether armv5tel-softfloat-linux-gnueabi-g++ supports C++11 features by default... yes
checking whether g++ supports C++11 features by default... no
checking whether g++ supports C++11 features with -std=gnu++11... no
checking whether g++ supports C++11 features with -std=gnu++0x... no
checking whether g++ supports C++11 features with -std=c++11... no
checking whether g++ supports C++11 features with +std=c++11... no
checking whether g++ supports C++11 features with -h std=c++11... no
checking whether g++ supports C++11 features with -std=c++0x... no
checking whether g++ supports C++11 features with +std=c++0x... no
checking whether g++ supports C++11 features with -h std=c++0x... no
configure: error: *** A compiler with support for C++11 language features is required.
 * ERROR: sys-devel/gcc-12.2.1_p20221231::gentoo failed (configure phase):
...

What am I doing wrong? Trying to add cxx use flag via env/genv when using crossdev doesn't seem to help. Found some comments online about using O3, that didn't help either. Any ideas?

Post by **NeddySeagoon** » Wed Jan 04, 2023 8:28 pm

xhakerek,

What does

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armv5tel-softfloat-linux-gnueabi-emerge --info

report?

I'm trying to recreate your error here.
So far I have needed a few steps you did not show.

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crossdev -t armv5tel-softfloat-linux-gnueabi
emerge-wrapper -t armv5tel-softfloat-linux-gnueabi --init
cd /usr/armv5tel-softfloat-linux-gnueabi/etc/portage/
ls -l
rm make.profile
ln -s /var/db/repos/gentoo/profiles/default/linux/arm/17.0/armv5te/ ./make.profile
nano make.conf
Add -su to USE.
armv5tel-softfloat-linux-gnueabi-emerge system -uav

Its on 53 of 170 as I write.

The profile change away from embedded is essential. Ive chosen the basic armv5te profile.
The USE change mas driven by a portage complaint.

Its not got to gcc yet ...

I don't expect everything to just work because it never has in the past but portage cross compile support has got a lot better in the last few years.

-- edit to add --

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$ armv5tel-softfloat-linux-gnueabi-emerge --info
Portage 3.0.42 (python 3.10.9-final-0, default/linux/arm/17.0/armv5te, gcc-12, unavailable, 6.1.1-gentoo x86_64)
=================================================================
System uname: Linux-6.1.1-gentoo-x86_64-AMD_Ryzen_9_5950X_16-Core_Processor-with-glibc2.36
KiB Mem:   131820576 total, 125903360 free
KiB Swap:          0 total,         0 free
Timestamp of repository gentoo: Sat, 31 Dec 2022 16:00:01 +0000
Head commit of repository gentoo: 54a84bb9547313f328a053bf9d6b03cd94373040
sh bash 5.2_p15
ld GNU ld (Gentoo 2.39 p5) 2.39.0
distcc 3.4 x86_64-pc-linux-gnu [disabled]
app-misc/pax-utils:        1.3.5::gentoo
app-shells/bash:           5.2_p15::gentoo
sys-apps/baselayout:       2.9::gentoo
sys-apps/sandbox:          2.30-r1::gentoo
sys-devel/binutils:        2.39-r4::gentoo
sys-devel/binutils-config: 5.4.1::gentoo
sys-devel/gcc-config:      2.9::gentoo
sys-devel/make:            4.4::gentoo
sys-kernel/linux-headers:  6.1::gentoo (virtual/os-headers)
Repositories:

gentoo
    location: /var/db/repos/gentoo
    sync-type: rsync
    sync-uri: rsync://rsync.gentoo.org/gentoo-portage
    priority: -1000
    volatile: True
    sync-rsync-extra-opts: 
    sync-rsync-verify-jobs: 1
    sync-rsync-verify-max-age: 24
    sync-rsync-verify-metamanifest: yes

ACCEPT_KEYWORDS="arm ~arm"
ACCEPT_LICENSE="@FREE"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O2 -pipe -fomit-frame-pointer"
CHOST="armv5tel-softfloat-linux-gnueabi"
CONFIG_PROTECT="/etc /usr/lib64/libreoffice/program/sofficerc /usr/share/config /usr/share/gnupg/qualified.txt"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-O2 -pipe -fomit-frame-pointer"
DISTDIR="/var/cache/distfiles"
ENV_UNSET="CARGO_HOME DBUS_SESSION_BUS_ADDRESS DISPLAY GOBIN GOPATH PERL5LIB PERL5OPT PERLPREFIX PERL_CORE PERL_MB_OPT PERL_MM_OPT XAUTHORITY XDG_CACHE_HOME XDG_CONFIG_HOME XDG_DATA_HOME XDG_RUNTIME_DIR XDG_STATE_HOME"
FCFLAGS="-O2 -pipe -march=armv5te"
FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs buildpkg buildpkg-live config-protect-if-modified distlocks ebuild-locks fixlafiles ipc-sandbox merge-sync multilib-strict network-sandbox news nodoc noinfo noman parallel-fetch pid-sandbox preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
FFLAGS="-O2 -pipe -march=armv5te"
GENTOO_MIRRORS="http://distfiles.gentoo.org"
LANG="en_GB.utf8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
LEX="flex"
PKGDIR="/usr/armv5tel-softfloat-linux-gnueabi/var/cache/binpkgs/"
PORTAGE_CONFIGROOT="/usr/armv5tel-softfloat-linux-gnueabi/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git"
PORTAGE_TMPDIR="/usr/armv5tel-softfloat-linux-gnueabi/tmp/"
SHELL="/bin/bash"
USE="acl arm bzip2 cli crypt dri fortran gdbm iconv ipv6 libglvnd ncurses nls nptl openmp pcre readline seccomp split-usr ssl unicode xattr zlib" ADA_TARGET="gnat_2021" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="karbon sheets words" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_ARM="edsp thumb v4 v5" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock greis isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="libinput" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LUA_SINGLE_TARGET="lua5-1" LUA_TARGETS="lua5-1" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php7-4 php8-0" POSTGRES_TARGETS="postgres12 postgres13" PYTHON_SINGLE_TARGET="python3_10" PYTHON_TARGETS="python3_10" RUBY_TARGETS="ruby27" USERLAND="GNU" VIDEO_CARDS="exynos fbdev omap dummy v4l" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq proto steal rawnat logmark ipmark dhcpmac delude chaos account"
Unset:  ADDR2LINE, AR, ARFLAGS, AS, ASFLAGS, CC, CCLD, CONFIG_SHELL, CPP, CPPFLAGS, CTARGET, CXX, CXXFILT, ELFEDIT, EMERGE_DEFAULT_OPTS, EXTRA_ECONF, F77FLAGS, FC, GCOV, GPROF, INSTALL_MASK, LC_ALL, LD, LFLAGS, LIBTOOL, LINGUAS, MAKE, MAKEFLAGS, MAKEOPTS, NM, OBJCOPY, OBJDUMP, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, RANLIB, READELF, RUSTFLAGS, SIZE, STRINGS, STRIP, YACC, YFLAGS

xhakerek · Post by **xhakerek** » Wed Jan 04, 2023 8:36 pm

Code: Select all

# armv5tel-softfloat-linux-gnueabi-emerge --info
Portage 3.0.41 (python 3.10.9-final-0, default/linux/arm/17.0/armv5te, gcc-12, glibc-2.36-r6, 5.15.80-gentoo x86_64)
=================================================================
System uname: Linux-5.15.80-gentoo-x86_64-Intel-R-_Xeon-R-_CPU_X5690_@_3.47GHz-with-glibc2.36
KiB Mem:    98969284 total,  83737724 free
KiB Swap:          0 total,         0 free
Timestamp of repository gentoo: Wed, 04 Jan 2023 04:30:01 +0000
Head commit of repository gentoo: c6b0035d9cbec03b58b2af5f433e77a87b709822
sh bash 5.1_p16-r2
ld GNU ld (Gentoo 2.39 p5) 2.39.0
app-misc/pax-utils:        1.3.5::gentoo
app-shells/bash:           5.2_p15::gentoo
sys-apps/baselayout:       2.9::gentoo
sys-apps/sandbox:          2.30-r1::gentoo
sys-devel/binutils:        2.39-r4::gentoo
sys-devel/binutils-config: 5.5::gentoo
sys-devel/gcc-config:      2.9::gentoo
sys-devel/make:            4.4::gentoo
sys-kernel/linux-headers:  6.1::gentoo (virtual/os-headers)
sys-libs/glibc:            2.36-r6::gentoo
Repositories:

gentoo
    location: /usr/portage
    sync-type: rsync
    sync-uri: rsync://rsync.gentoo.org/gentoo-portage
    priority: -1000
    sync-rsync-extra-opts: 
    sync-rsync-verify-jobs: 1
    sync-rsync-verify-metamanifest: yes
    sync-rsync-verify-max-age: 24

ACCEPT_KEYWORDS="arm ~arm"
ACCEPT_LICENSE="@FREE"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O2 -pipe -fomit-frame-pointer -mtune=xscale -march=armv5te"
CHOST="armv5tel-softfloat-linux-gnueabi"
CONFIG_PROTECT="/etc"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/gconf /etc/gentoo-release /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-O2 -pipe -fomit-frame-pointer -mtune=xscale -march=armv5te"
DISTDIR="/usr/portage/distfiles"
EMERGE_DEFAULT_OPTS="--jobs=24 --load-average=24"
ENV_UNSET="CARGO_HOME DBUS_SESSION_BUS_ADDRESS DISPLAY GOBIN GOPATH PERL5LIB PERL5OPT PERLPREFIX PERL_CORE PERL_MB_OPT PERL_MM_OPT XAUTHORITY XDG_CACHE_HOME XDG_CONFIG_HOME XDG_DATA_HOME XDG_RUNTIME_DIR XDG_STATE_HOME"
FCFLAGS="-O2 -pipe -march=armv5te"
FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs buildpkg buildpkg-live config-protect-if-modified distlocks ebuild-locks fixlafiles ipc-sandbox merge-sync multilib-strict network-sandbox news nodoc noinfo noman parallel-fetch pid-sandbox preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
FFLAGS="-O2 -pipe -march=armv5te"
GENTOO_MIRRORS="http://distfiles.gentoo.org"
LANG="pl_PL.UTF-8"
LC_ALL="pl_PL.UTF-8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
LEX="flex"
MAKEOPTS="-j24 -l24"
PKGDIR="/usr/armv5tel-softfloat-linux-gnueabi/var/cache/binpkgs/"
PORTAGE_CONFIGROOT="/usr/armv5tel-softfloat-linux-gnueabi/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git"
PORTAGE_TMPDIR="/usr/armv5tel-softfloat-linux-gnueabi/tmp/"
SHELL="/bin/bash"
USE="acl arm bzip2 cli crypt dri fortran gdbm iconv libglvnd ncurses nls nptl openmp pcre readline seccomp split-usr ssl unicode xattr zlib" ADA_TARGET="gnat_2021" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="karbon sheets words" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_ARM="edsp thumb v4 v5" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock greis isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="libinput" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LUA_SINGLE_TARGET="lua5-1" LUA_TARGETS="lua5-1" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php7-4 php8-0" POSTGRES_TARGETS="postgres12 postgres13" PYTHON_SINGLE_TARGET="python3_10" PYTHON_TARGETS="python3_10" RUBY_TARGETS="ruby27" USERLAND="GNU" VIDEO_CARDS="exynos fbdev omap dummy v4l" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq proto steal rawnat logmark ipmark dhcpmac delude chaos account"
Unset:  ADDR2LINE, AR, ARFLAGS, AS, ASFLAGS, CC, CCLD, CONFIG_SHELL, CPP, CPPFLAGS, CTARGET, CXX, CXXFILT, ELFEDIT, EXTRA_ECONF, F77FLAGS, FC, GCOV, GPROF, INSTALL_MASK, LD, LFLAGS, LIBTOOL, LINGUAS, MAKE, MAKEFLAGS, NM, OBJCOPY, OBJDUMP, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, RANLIB, READELF, RUSTFLAGS, SIZE, STRINGS, STRIP, YACC, YFLAGS

This went through fine:

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crossdev -t armv5tel-softfloat-linux-gnueabi

I have never had to use this in the past:

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emerge-wrapper -t armv5tel-softfloat-linux-gnueabi --init

USe this instead:

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armv5tel-softfloat-linux-gnueabi-emerge

Profile is set:

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# ls -alh make.profile
lrwxrwxrwx 1 root root 56 01-04 13:53 make.profile -> ../../../portage/profiles/default/linux/arm/17.0/armv5te

I did have to add -su, just like you said.

xhakerek · Post by **xhakerek** » Wed Jan 04, 2023 8:54 pm

I think I got it. Adding a global cxx flag on the host system seem to have helped.
Shouldn't this be addressed in crossdev itself? Add cxx to whatever needs it? Pretty sure the arm env should be able to build gcc out of the box?

Now fighting with openssl function MD5_Init not being pulled in. Seems passing -ssl to curl/wget is taking care of that, at build time at least.

Post by **NeddySeagoon** » Wed Jan 04, 2023 9:24 pm

xhakerek,

As gcc is written is C++ is deliberately made difficult to turn off USE=cxx, or the resulting gcc can no longer build itself.

On my host ...

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$ emerge sys-devel/gcc -pv

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild   R    ] sys-devel/gcc-12.2.1_p20221224:12::gentoo  USE="(cxx) fortran graphite lto nls nptl openmp (pie) sanitize ssp -ada (-cet) (-custom-cflags) -d -debug -default-stack-clash-protection -default-znow -doc (-fixed-point) -go (-hardened) (-ieee-long-double) -jit (-libssp) (-multilib) -objc -objc++ -objc-gc (-pch) -pgo -systemtap -test -valgrind -vanilla -vtv -zstd" 0 KiB

Note the (cxx), meaning forced on.

To build python I had to

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export ax_cv_c_float_words_bigendian=no

There is one more wart.
Portage assumes that the @system set is always installed.
Further, unless they have special requirements, ebuilds do not explicitly depend on members of the system set.

Taken together those two points mean that when building the system set into an empty chroot, portage does not get the build order right but will build more on subsequent attempts.
It took me three goes but I have a complete cross compiled armv5tel-softfloat-linux-gnueabi @system set now.

I just need a suitable QEMU staiic-user to be able to chroot into it from the host.

xhakerek · Post by **xhakerek** » Thu Jan 05, 2023 6:54 am

Sounds like my experience exactly. System compiled after n attempts. Now fighting with HW acceleration from mv_cesa:/