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Bug 594176 - dev-libs/tvision-2.1.0_pre2-r3 : ../.../ error: call of overloaded ‘abs(unsigned int)’ is ambiguous
Summary: dev-libs/tvision-2.1.0_pre2-r3 : ../.../ error: call of ov...
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: Current packages (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: No maintainer - Look at if you want to take care of it
Depends on:
Blocks: gcc-6
  Show dependency tree
Reported: 2016-09-18 08:55 UTC by Toralf Förster
Modified: 2017-12-02 09:44 UTC (History)
2 users (show)

See Also:
Package list:
Runtime testing required: ---

dev-libs:tvision-2.1.0_pre2-r3:20160918-021147.log (dev-libs:tvision-2.1.0_pre2-r3:20160918-021147.log,45.20 KB, text/plain)
2016-09-18 08:56 UTC, Toralf Förster
emerge-history.txt (emerge-history.txt,127.73 KB, text/plain)
2016-09-18 08:56 UTC, Toralf Förster
environment (environment,74.86 KB, text/plain)
2016-09-18 08:56 UTC, Toralf Förster
tvision-2.1.0_pre2-gcc6.patch (tvision-2.1.0_pre2-gcc6.patch,5.79 KB, patch)
2016-09-23 06:24 UTC, Peter Levine
Details | Diff
emerge-info.txt (emerge-info.txt,15.09 KB, text/plain)
2017-11-30 19:20 UTC, Toralf Förster
dev-libs:tvision- (dev-libs:tvision-,37.09 KB, text/plain)
2017-11-30 19:20 UTC, Toralf Förster
emerge-history.txt (emerge-history.txt,63.45 KB, text/plain)
2017-11-30 19:20 UTC, Toralf Förster
environment (environment,16.16 KB, text/plain)
2017-11-30 19:20 UTC, Toralf Förster
etc.portage.tbz2 (etc.portage.tbz2,12.12 KB, application/x-bzip)
2017-11-30 19:20 UTC, Toralf Förster
logs.tbz2 (logs.tbz2,67.85 KB, application/x-bzip)
2017-11-30 19:20 UTC, Toralf Förster
temp.tbz2 (temp.tbz2,10.44 KB, application/x-bzip)
2017-11-30 19:20 UTC, Toralf Förster

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Description Toralf Förster gentoo-dev 2016-09-18 08:55:55 UTC
g++  -I../include        -march=native -O2 -pipe  -c ../classes/ -o obj/tdesktop.o
../classes/ In function ‘unsigned int iSqr(unsigned int)’:
../classes/ error: call of overloaded ‘abs(unsigned int)’ is ambiguous
     while( abs( res1 - res2 ) > 1 )
In file included from /usr/lib/gcc/x86_64-pc-linux-gnu/6.2.0/include/g++-v6/cstdlib:75:0,

$ cat emerge-info.txt

  This is an unstable amd64 chroot image (named amd64-13.0-systemd-libressl-unstable_20160915-201401) at a hardened host acting as a tinderbox.

  USE flags ...

  ... in make.conf:
USE="  -openssl -gnutls libressl pax_kernel xtpax -cdinstall -oci8 -bindist cgroups contrib custom-optimization -dbus -declarative dvb dvd ecc -eglfs extraengine fortran ftp git gles gtk2 havege icu imlib inifile ipv6 jpeg -lapack libkms mad modplug mpeg2 nls offensive openexr png postscript printsupport qt3support qt4 scrypt sdl semantic-desktop sqlite3 ssh-askpass ssl system-jpeg -system-sqlite timidity -tools truetype uml usb vaapi video vpx wma wxwidgets xkb -xscreensaver xslt xvfb zenmap"

  ... in /etc/portage/package.use/*:
  mail-mta/ssmtp      ssl mta
  net-misc/wget       ssl
  app-crypt/pinentry  -qt4
  app-editors/emacs   -dbus -svg -ssl -gtk -gtk3
  app-text/xmlto      -latex
  dev-libs/boehm-gc   threads
  dev-libs/libpcre    pcre16
  dev-qt/qtgui        egl eglfs
  net-nds/openldap    -sasl
  dev-util/cmake      -qt4 -qt5
  dev-vcs/git         -perl
  gnome-base/librsvg  -tools
  media-libs/mesa     -vaapi
  sys-apps/kmod       tools
  <=net-misc/openssh-7.3_p1-r2    -hpn
  media-libs/imlib2 X
  sys-apps/kmod tools

  entries in /etc/portage/package.unmask/*:

gcc-config -l:
 [1] x86_64-pc-linux-gnu-6.2.0 *

Available Python interpreters, in order of preference:
  [1]   python3.4
  [2]   python3.5 (fallback)
  [3]   python2.7 (fallback)


Portage 2.3.0 (python 3.4.5-final-0, default/linux/amd64/13.0/systemd, gcc-6.2.0, glibc-2.23-r2, 4.7.4-hardened x86_64)
                         System Settings
System uname: Linux-4.7.4-hardened-x86_64-Intel-R-_Core-TM-_i7-3930K_CPU_@_3.20GHz-with-gentoo-2.3
KiB Mem:    65285480 total,  13548872 free
KiB Swap:   67108860 total,  67108860 free
Timestamp of repository gentoo: Sun, 18 Sep 2016 00:46:53 +0000
sh bash 4.3_p46
ld GNU ld (Gentoo 2.26.1 p1.0) 2.26.1
app-shells/bash:          4.3_p46::gentoo
dev-lang/perl:            5.24.0-r1::gentoo
dev-lang/python:          2.7.12::gentoo, 3.4.5::gentoo, 3.5.2::gentoo
dev-util/cmake:           3.6.2::gentoo
dev-util/pkgconfig:       0.29.1::gentoo
sys-apps/baselayout:      2.3::gentoo
sys-apps/openrc:          0.21.7::gentoo
sys-apps/sandbox:         2.10-r2::gentoo
sys-devel/autoconf:       2.13::gentoo, 2.69-r2::gentoo
sys-devel/automake:       1.9.6-r4::gentoo, 1.11.6-r2::gentoo, 1.13.4-r1::gentoo, 1.14.1-r1::gentoo, 1.15-r2::gentoo
sys-devel/binutils:       2.26.1::gentoo
sys-devel/gcc:            6.2.0::gentoo
sys-devel/gcc-config:     1.8-r1::gentoo
sys-devel/libtool:        2.4.6-r2::gentoo
sys-devel/make:           4.2.1::gentoo
sys-kernel/linux-headers: 4.7::gentoo (virtual/os-headers)
sys-libs/glibc:           2.23-r2::gentoo

    location: /usr/portage
    sync-type: rsync
    sync-uri: rsync://
    priority: 1

    location: /usr/local/portage
    masters: gentoo
    priority: 2

ACCEPT_KEYWORDS="amd64 ~amd64"
CFLAGS="-march=native -O2 -pipe"
CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-march=native -O2 -pipe"
EMERGE_DEFAULT_OPTS="--verbose --verbose-conflicts --color=n --nospinner --tree --quiet-build"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles ipc-sandbox merge-sync network-sandbox parallel-fetch preserve-libs protect-owned sandbox sfperms strict test-fail-continue unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS=" rsync:// rsync://"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
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"
USE="acl amd64 berkdb bzip2 cgroups cli contrib cracklib crypt custom-optimization cxx dri dvb dvd ecc extraengine fortran ftp gdbm git gles gtk2 havege iconv icu imlib inifile ipv6 jpeg libkms libressl mad mmx mmxext modplug modules mpeg2 multilib ncurses nls nptl offensive openexr openmp pam pax_kernel pcre png postscript printsupport qt3support qt4 readline scrypt sdl seccomp semantic-desktop session sqlite3 sse sse2 ssh-askpass ssl system-jpeg systemd tcpd timidity truetype udev uml unicode usb vaapi video vpx wma wxwidgets xattr xkb xslt xtpax xvfb zenmap zlib" ABI_X86="64" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" 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="kexi words flow plan sheets stage tables krita karbon braindump author" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="aes avx mmx mmxext popcnt sse sse2 sse3 sse4_1 sse4_2 ssse3" CURL_SSL="libressl" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="keyboard mouse evdev" KERNEL="linux" L10N="ja km ml pt-PT te tl" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-6" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_4" RUBY_TARGETS="ruby20 ruby21" USERLAND="GNU" VIDEO_CARDS="amdgpu fbdev intel nouveau radeon radeonsi vesa dummy v4l" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account"
Comment 1 Toralf Förster gentoo-dev 2016-09-18 08:56:01 UTC
Created attachment 446328 [details]
Comment 2 Toralf Förster gentoo-dev 2016-09-18 08:56:04 UTC
Created attachment 446330 [details]
Comment 3 Toralf Förster gentoo-dev 2016-09-18 08:56:06 UTC
Created attachment 446332 [details]
Comment 4 Peter Levine 2016-09-23 06:24:58 UTC
Created attachment 447484 [details, diff]

Post c++11, std::abs isn't defined for unsigned values nor should it be. IIRC, the result of any arithmetic between unsigned operands is itself unsigned. And the absolute value of an unsigned value is that same value, so the `abs` should be able to be safely omitted:

i.e., given:

    unsigned int a;
    unsigned int b;


    int c = abs(a - b);

is the same as

    int c = a - b;

for any a or b
Comment 5 Pacho Ramos gentoo-dev 2016-11-10 16:20:59 UTC
Probably sending the patches using github PR would help to get all your gcc6 fixed pushed earlier :)
Comment 6 Pacho Ramos gentoo-dev 2017-04-04 15:27:57 UTC
Since nothing seems to require this, maybe this could be treecleaned :/
Comment 7 Andreas Sturmlechner gentoo-dev 2017-06-03 21:30:40 UTC
Thanks, fixed in git commit 7ef2291f68b16dd0e5c53ee0e760a39c089e048a
Comment 8 Toralf Förster gentoo-dev 2017-11-30 19:20:03 UTC
got at the unstable amd64 chroot image 13.0-desktop-plasma-systemd_abi32+64_20171128-221102 this : ../.../ error: call of overloaded abs(unsigned int) is ambiguous
Comment 9 Toralf Förster gentoo-dev 2017-11-30 19:20:08 UTC
Created attachment 507310 [details]
Comment 10 Toralf Förster gentoo-dev 2017-11-30 19:20:11 UTC
Created attachment 507312 [details]
Comment 11 Toralf Förster gentoo-dev 2017-11-30 19:20:14 UTC
Created attachment 507314 [details]
Comment 12 Toralf Förster gentoo-dev 2017-11-30 19:20:17 UTC
Created attachment 507316 [details]
Comment 13 Toralf Förster gentoo-dev 2017-11-30 19:20:20 UTC
Created attachment 507318 [details]
Comment 14 Toralf Förster gentoo-dev 2017-11-30 19:20:23 UTC
Created attachment 507320 [details]
Comment 15 Toralf Förster gentoo-dev 2017-11-30 19:20:26 UTC
Created attachment 507322 [details]
Comment 16 Pacho Ramos gentoo-dev 2017-12-02 09:44:11 UTC
I would open a separate bug report because your last failure looks a gcc7 issue, not gcc6