If ImageMagick is compiled with USE="png", png support isn't actually enabled. The build process does pass the correct flags: during the ./configure, it shows its enabled, and even "convert -list format" shows it there, but it doesn't work: convert xc:black png:- convert: no encode delegate for this image format `png:-'. ldd shows libpng not being linked in: ldd `which convert` linux-gate.so.1 => (0xffffe000) libMagick.so.10 => /usr/lib/libMagick.so.10 (0xb7e9e000) libWand.so.10 => /usr/lib/libWand.so.10 (0xb7e07000) libjpeg.so.62 => /usr/lib/libjpeg.so.62 (0xb7de8000) libbz2.so.1 => /lib/libbz2.so.1 (0xb7dd8000) libpthread.so.0 => /lib/libpthread.so.0 (0xb7dc5000) libfreetype.so.6 => /usr/lib/libfreetype.so.6 (0xb7d59000) libz.so.1 => /lib/libz.so.1 (0xb7d46000) libdl.so.2 => /lib/libdl.so.2 (0xb7d42000) libm.so.6 => /lib/libm.so.6 (0xb7d1d000) libc.so.6 => /lib/libc.so.6 (0xb7bfe000) /lib/ld-linux.so.2 (0xb7fc4000)
Gentoo Base System version 1.12.5 Portage 2.1.1 (default-linux/x86/2006.1, gcc-4.1.1, glibc-2.4-r3, 2.6.17-gentoo-r8 i686) ================================================================= System uname: 2.6.17-gentoo-r8 i686 AMD Athlon(tm) XP 2000+ Last Sync: Sun, 24 Sep 2006 04:30:08 +0000 app-admin/eselect-compiler: [Not Present] dev-java/java-config: [Not Present] dev-lang/python: 2.4.3-r1 dev-python/pycrypto: 2.0.1-r5 dev-util/ccache: [Not Present] dev-util/confcache: [Not Present] sys-apps/sandbox: 1.2.17 sys-devel/autoconf: 2.13, 2.59-r7 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2 sys-devel/binutils: 2.16.1-r3 sys-devel/gcc-config: 1.3.13-r3 sys-devel/libtool: 1.5.22 virtual/os-headers: 2.6.17-r1 ACCEPT_KEYWORDS="x86" AUTOCLEAN="yes" CBUILD="i686-pc-linux-gnu" CFLAGS="-mtune=i686 -O2 -pipe" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc" CONFIG_PROTECT_MASK="/etc/env.d /etc/gconf /etc/revdep-rebuild /etc/terminfo" CXXFLAGS="-mtune=i686 -O2 -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig buildpkg distlocks metadata-transfer sandbox sfperms strict" GENTOO_MIRRORS="http://distfiles.gentoo.org http://distro.ibiblio.org/pub/linux/distributions/gentoo" LINGUAS="" PKGDIR="/usr/portage/packages" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --delete-after --stats --timeout=180 --exclude='/distfiles' --exclude='/local' --exclude='/packages'" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="x86 berkdb bitmap-fonts bzip2 caps cli crypt cups dbus dlloader dri elibc_glibc fam fortran gdbm gnutls gpm input_devices_evdev input_devices_keyboard input_devices_mouse ipv6 isdnlog kernel_linux libg++ logrotate ncurses nls nptl nptlonly pam pcre perl ppds pppd python readline reflection samba session spl ssl tcpd truetype-fonts type1-fonts udev unicode userland_GNU video_cards_fbdev video_cards_savage xorg zlib" Unset: CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, LDFLAGS, MAKEOPTS, PORTAGE_RSYNC_EXTRA_OPTS Note that "png" isn't in the USE flag, but it is listed in my /etc/portage/package.use file: media-gfx/imagemagick jpeg png gs truetype Portage correctly shows png as being enabled for this package
Created attachment 97917 [details] Output of build process The output of the build process. The interesting parts are scattered all over.
Created attachment 97918 [details] Output of "convert -list format" THis is the output of "convert -list format"
Well, now, suddenly (without me even re-emerging it) the problem has fixed itself. "convert" not being linked to libpng was a red herring - it must dlopen() it instead.
