qfile.c: In function 'prepare_qfile_args': qfile.c:39: warning: inlining failed in call to 'qfile_is_prefix': --param max-inline-insns-single limit reached qfile.c:409: warning: called from here qfile.c:39: warning: inlining failed in call to 'qfile_is_prefix': --param max-inline-insns-single limit reached qfile.c:428: warning: called from here qcache.c: In function 'qcache_read_lines': qcache.c:235: warning: inlining failed in call to 'qcache_count_lines': --param max-inline-insns-single limit reached qcache.c:271: warning: called from here qfile.c: In function 'qfile': qfile.c:39: warning: inlining failed in call to 'qfile_is_prefix': --param max-inline-insns-single limit reached qfile.c:199: warning: called from here $ emerge --info Portage 2.1.2.3 (default-linux/x86/2006.1/desktop, gcc-4.1.2, glibc-2.5-r1, 2.6.20-gentoo i686) ================================================================= System uname: 2.6.20-gentoo i686 Intel(R) Pentium(R) M processor 1.80GHz Gentoo Base System release 1.12.10 Timestamp of tree: Fri, 06 Apr 2007 02:30:01 +0000 ccache version 2.4 [enabled] dev-java/java-config: 1.3.7, 2.0.31-r5 dev-lang/python: 2.4.4 dev-python/pycrypto: 2.0.1-r5 dev-util/ccache: 2.4-r6 sys-apps/sandbox: 1.2.18.1 sys-devel/autoconf: 2.13, 2.61 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10 sys-devel/binutils: 2.17 sys-devel/gcc-config: 1.3.15-r1 sys-devel/libtool: 1.5.23b virtual/os-headers: 2.6.20-r2 ACCEPT_KEYWORDS="x86 ~x86" AUTOCLEAN="yes" CBUILD="i686-pc-linux-gnu" CFLAGS="-Os -march=pentium-m -pipe -ggdb" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/X11/xkb" CONFIG_PROTECT_MASK="/etc/env.d /etc/env.d/java/ /etc/gconf /etc/java-config/vms/ /etc/revdep-rebuild /etc/splash /etc/terminfo /etc/texmf/web2c" CXXFLAGS="-Os -march=pentium-m -pipe -ggdb" DISTDIR="/usr/portage/distfiles" FEATURES="autoaddcvs ccache cvs distlocks metadata-transfer sandbox sfperms sign splitdebug strict" GENTOO_MIRRORS="http://distfiles.gentoo.org http://distro.ibiblio.org/pub/linux/distributions/gentoo" LDFLAGS="-Wl,--as-needed" MAKEOPTS="-l 2" 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 --filter=H_**/files/digest-*" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/home/cardoe/workspace/gentopia/overlay /home/cardoe/workspace/gnome" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="X a52 aac acpi alsa avahi bash-completion berkdb bitmap-fonts bzip2 cairo cdr cli cracklib crypt cups dbus dmi dri dts dvd dvdr encode exif fam firefox gdbm gif glitz gnome gstreamer gtk hal howl iconv ipv6 isdnlog jpeg lcms libg++ libnotify live mad midi mjpeg mmx mono mp3 mpeg mythtv ncurses nptl nptlonly oav ogg opengl pam pcre pdf perl png pppd python qt3 quicktime readline reflection samba sdl session spell sse sse2 ssl svg tcpd tiff truetype truetype-fonts type1-fonts unicode vorbis win32codecs x86 xcb xml xorg xv xvid zlib" ALSA_CARDS="intel8x0" ELIBC="glibc" INPUT_DEVICES="keyboard mouse" KERNEL="linux" LIRC_DEVICES="mceusb2" USERLAND="GNU" VIDEO_CARDS="radeon ati" Unset: CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, LINGUAS, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
The problem is related to the -Os flag. Here is what GCC does (gcc/opts.c): if (optimize_size) { /* Inlining of very small functions usually reduces total size. */ set_param_value ("max-inline-insns-single", 5); set_param_value ("max-inline-insns-auto", 5); flag_inline_functions = 1; It means there is a 5 pseudo instructions limit for explicitly inlined functions (that's what max-inline-insns-single is about, see `man gcc`), which qfile_is_prefix() and qcache_count_lines() obviously outsteps. I can think of the following options to kill this warnings: - qfile_is_prefix(), we could make it a macro. It's ugly, but we can't drop the inline keyword on this one, since it's used 3 times in the code and thus would not even be considered for inlining at -O2 (ie. when not using -finline-functions). - qcache_count_lines(), we could make it static instead of inline, because it's only used once, and thus should in theory fall under -finline-functions-called-once (which is enabled at any -Ox level). I will attach a patch which does that.
Created attachment 115601 [details, diff] kill_-Os_inlining_warnings.patch
/var/cvsroot/gentoo-projects/portage-utils/qcache.c,v <-- qcache.c new revision: 1.23; previous revision: 1.22 /var/cvsroot/gentoo-projects/portage-utils/qfile.c,v <-- qfile.c new revision: 1.43; previous revision: 1.42
