OpenOCD consistently dies with the error: ... cc1: warnings being treated as errors amt_jtagaccel.c: In function 'amt_jtagaccel_reset': amt_jtagaccel.c:152: error: ignoring return value of 'write', declared with attribute warn_unused_result ... The problem lines are 73-78 in openocd-9999/src/jtag/amt_jtagaccel.c (example): 73: #define AMT_AW(val) do { ioctl(device_handle, PPSETMODE, &addr_mode); write(device_handle, &val, 1); } while (0) ... I tried a number of fixes, including voiding the returns, creating some dummy variable, etc. they all gave warnings which were interpreted as errors due to the -Werror CFLAG being set. When I added --disable-werror to the ebuild's econf I was able to get further in the compile. Other errors will be reported separately. ###################### obligatory emerge --info ###################### Portage 2.1.6.12 (default/linux/x86/2008.0/desktop, gcc-4.3.3, glibc-2.9_p20081201-r2, 2.6.28-gentoo-r5 i686) ================================================================= System uname: Linux-2.6.28-gentoo-r5-i686-Intel-R-_Pentium-R-_Dual_CPU_T2330_@_1.60GHz-with-glibc2.0 Timestamp of tree: Sat, 02 May 2009 03:45:01 +0000 ccache version 2.4 [enabled] app-shells/bash: 3.2_p39 dev-java/java-config: 1.3.7-r1, 2.1.7 dev-lang/python: 2.4.4-r14, 2.5.4-r2 dev-python/pycrypto: 2.0.1-r8 dev-util/ccache: 2.4-r7 dev-util/cmake: 2.6.3-r1 sys-apps/baselayout: 1.12.11.1 sys-apps/sandbox: 1.6-r2 sys-devel/autoconf: 2.13, 2.63 sys-devel/automake: 1.4_p6, 1.5, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10.2 sys-devel/binutils: 2.18-r3 sys-devel/gcc-config: 1.4.0-r4 sys-devel/libtool: 1.5.26 virtual/os-headers: 2.6.27-r2 ACCEPT_KEYWORDS="x86" CBUILD="i686-pc-linux-gnu" CFLAGS="-O2 -march=i686 -pipe" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/3.5/env /usr/kde/3.5/share/config /usr/kde/3.5/shutdown /usr/share/config /var/lib/hsqldb" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/ /etc/fonts/fonts.conf /etc/gconf /etc/php/apache2-php5/ext-active/ /etc/php/cgi-php5/ext-active/ /etc/php/cli-php5/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c /etc/udev/rules.d" CXXFLAGS="-O2 -march=i686 -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="ccache distlocks fixpackages metadata-transfer nostrip parallel-fetch protect-owned sandbox sfperms splitdebug strict unmerge-orphans userfetch" GENTOO_MIRRORS="http://distfiles.gentoo.org http://distro.ibiblio.org/pub/linux/distributions/gentoo http://gentoo.osuosl.org/ ftp://distro.ibiblio.org/pub/linux/distributions/gentoo/ http://distro.ibiblio.org/pub/linux/distributions/gentoo/ ftp://ftp.gtlib.gatech.edu/pub/gentoo http://www.gtlib.gatech.edu/pub/gentoo ftp://mirror.iawnet.sandia.gov/pub/gentoo/ ftp://ftp.ussg.iu.edu/pub/linux/gentoo http://cudlug.cudenver.edu/gentoo/ http://gentoo.mirrors.pair.com/ ftp://gentoo.mirrors.pair.com/ http://gentoo.mirrors.tds.net/gentoo ftp://gentoo.mirrors.tds.net/gentoo http://gentoo.netnitco.net ftp://gentoo.netnitco.net/pub/mirrors/gentoo/source/ http://mirror.espri.arizona.edu/gentoo/ http://prometheus.cs.wmich.edu/gentoo http://mirror.mcs.anl.gov/pub/gentoo/ ftp://mirror.mcs.anl.gov/pub/gentoo/ http://gentoo.cites.uiuc.edu/pub/gentoo/ ftp://gentoo.cites.uiuc.edu/pub/gentoo/ http://mirror.fslutd.org/linux/distributions/gentoo/ ftp://mirror.fslutd.org/linux/distributions/gentoo/ nehet" LDFLAGS="-Wl,-O1" LINGUAS="en" MAKEOPTS="-j4" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/portage/local/layman/pd-overlay /usr/portage/local/layman/science /usr/local/portage_overlays /old_root/home/ebo/gtd/projects/computer/local_portage/ref/local-portage" SYNC=" rsync://rsync.namerica.gentoo.org/gentoo-portage" USE="3dnow X a52 aac acl acpi alsa arts audiofile bash-completion berkdb blas blender-game bluetooth branding bzip2 cairo cdr cli clisp cmucl cracklib crypt css cups curl cvs dbus divx dri dvd dvdr dvdread eds emacs emboss encode esd evo fam ffmpeg fftw firefox fits flac fortran ftp gcl gd gdbm geos gif gimp git gmedia gnome gpg gpm graphviz gstreamer gtk hal hddtemp hdf5 iconv ieee1394 ipod ipv6 ipw3945 isdnlog jack java java5 java6 javascript jpeg jpeg2k kde lapack laptop latex ldap libnotify lm_sensors mad midi mikmod mp3 mpeg mudflap ncurses netcdf nls nptl nptlonly nsplugin ogdi ogg openal opengl openmp osc pam pcre pdf perl png portaudio postgres ppds pppd python qt3 qt3support qt4 quicktime readline realmedia reflection sasl sbcl scanner sdl session snmp spell spl ssl startup-notification subversion svg sysfs tcl tcpd threads tiff tk truetype unicode usb vorbis wavpack win32codecs wmf wmp x86 xcb xine xinerama xml xorg xpm xprint xulrunner xv xvid zlib" ALSA_CARDS="hda-intel" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="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 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" ELIBC="glibc" FOO2ZJS_DEVICES="hpp1006" INPUT_DEVICES="keyboard mouse synaptics evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="en" USERLAND="GNU" VIDEO_CARDS="i810 v4l vesa" Unset: CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, FFLAGS, INSTALL_MASK, LANG, LC_ALL, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
I just had an idea for a potential solution to this. Add something like: $(use !debug && echo "--disable-werror") to the ebuild. This worked in a simple test case. Actually, I think that disabling werror by default upstream and possibly adding "--enable-werror" if debug, or other use flag, is set. Just a though...
no ebuild in the tree should ever build with -Werror regardless of USE flags
following up on this I find that it is still broken upstream...
Fixed, thanks
