I haven't emerged gcc/glibc in a while, so it struck me recently strange when i compiled KDE 3.4 that gcc segfaults every now and then. I had first thought that this must be an issue with KDE and let it pass. Now, when i emerge any app, configure fails complaining this: <snip> checking for long double... yes checking size of long double... configure: error: cannot compute sizeof (long double), 77 See `config.log' for more details. </snip> Note that with some packages it is sizeof (int), others are sizeof (char) but every single emerge fails now. I checked config.log and i see this for the sizeof section: <snip> configure:7450: i686-pc-linux-gnu-gcc -o conftest -O2 -march=pentium4 -pipe -freorder-blocks -finline-limit=2000 -O2 conftest.c >&5 conftest.c: In function `main': conftest.c:100: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://bugs.gentoo.org/> for instructions. Preprocessed source stored into /var/tmp/portage/glibc-2.3.4.20041102-r1/temp/ccEYdDQ7.out file, please attach this to your bugreport. configure:7453: $? = 1 configure: program exited with status 1 configure: failed program was: | /* confdefs.h. */ | | #define PACKAGE_NAME "GNU C Library" | #define PACKAGE_TARNAME "c-library" | #define PACKAGE_VERSION "(see version.h)" | #define PACKAGE_STRING "GNU C Library (see version.h)" | #define PACKAGE_BUGREPORT "glibc" | #define USE_REGPARMS 1 | #ifdef __cplusplus | extern "C" void std::exit (int) throw (); using std::exit; | #endif | #define ASM_GLOBAL_DIRECTIVE .globl | #define HAVE_ASM_SET_DIRECTIVE 1 | #define ASM_TYPE_DIRECTIVE_PREFIX @ | #define DO_VERSIONING 1 | #define HAVE_ASM_PREVIOUS_DIRECTIVE 1 | #define HAVE_PROTECTED 1 | #define HAVE_HIDDEN 1 | #define HAVE_VISIBILITY_ATTRIBUTE 1 | #define HAVE_INITFINI_ARRAY 1 | #define HAVE_Z_RELRO 1 | #define HAVE_Z_COMBRELOC 1 | #define NO_UNDERSCORES 1 | #define HAVE_ASM_WEAK_DIRECTIVE 1 | #define HAVE_ASM_CFI_DIRECTIVES 1 | #define HAVE_CPP_ASM_DEBUGINFO 1 | #define HAVE_SYS_TYPES_H 1 | #define HAVE_SYS_STAT_H 1 | #define HAVE_STDLIB_H 1 | #define HAVE_STRING_H 1 | #define HAVE_MEMORY_H 1 | #define HAVE_STRINGS_H 1 | #define HAVE_INTTYPES_H 1 | #define HAVE_STDINT_H 1 | #define HAVE_UNISTD_H 1 | /* end confdefs.h. */ | #include <stdio.h> | #if HAVE_SYS_TYPES_H | # include <sys/types.h> | #endif | #if HAVE_SYS_STAT_H | # include <sys/stat.h> | #endif | #if STDC_HEADERS | # include <stdlib.h> | # include <stddef.h> | #else | # if HAVE_STDLIB_H | # include <stdlib.h> | # endif | #endif | #if HAVE_STRING_H | # if !STDC_HEADERS && HAVE_MEMORY_H | # include <memory.h> | # endif | # include <string.h> | #endif | #if HAVE_STRINGS_H | # include <strings.h> | #endif | #if HAVE_INTTYPES_H | # include <inttypes.h> | #else | # if HAVE_STDINT_H | # include <stdint.h> | # endif | #endif | #if HAVE_UNISTD_H | # include <unistd.h> | #endif | long longval () { return (long) (sizeof (long double)); } | unsigned long ulongval () { return (long) (sizeof (long double)); } | #include <stdio.h> | #include <stdlib.h> | int | main () | { | | FILE *f = fopen ("conftest.val", "w"); | if (! f) | exit (1); | if (((long) (sizeof (long double))) < 0) | { | long i = longval ();| if (i != ((long) (sizeof (long double)))) | exit (1); | fprintf (f, "%ld\n", i); | } | else | { | unsigned long i = ulongval (); | if (i != ((long) (sizeof (long double)))) | exit (1); | fprintf (f, "%lu\n", i); | } | exit (ferror (f) || fclose (f) != 0); | | ; | return 0; | } configure:7468: error: cannot compute sizeof (long double), 77 See `config.log' for more details. </snip> Reproducible: Always Steps to Reproduce: 1. 2. 3. Portage 2.0.51.19 (default-linux/x86/2005.0, gcc-3.3.5-20050130, glibc-2.3.4.20041102-r1, 2.6.11-gentoo-r9 i686) ================================================================= System uname: 2.6.11-gentoo-r9 i686 Intel(R) Pentium(R) 4 CPU 2.40GHz Gentoo Base System version 1.6.12 Python: dev-lang/python-2.3.5 [2.3.5 (#1, May 10 2005, 13:46:20)] dev-lang/python: 2.3.5 sys-apps/sandbox: [Not Present] sys-devel/autoconf: 2.59-r6, 2.13 sys-devel/automake: 1.7.9-r1, 1.8.5-r3, 1.5, 1.4_p6, 1.6.3, 1.9.5 sys-devel/binutils: 2.15.92.0.2-r10 sys-devel/libtool: 1.5.16 virtual/os-headers: 2.6.8.1-r2 ACCEPT_KEYWORDS="x86" AUTOCLEAN="yes" CFLAGS="-O2 -march=pentium4 -fomit-frame-pointer -pipe" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.3/env /usr/kde/3.3/share/config /usr/kde/3.3/shutdown /usr/kde/3.4/env /usr/kde/3.4/share/config /usr/kde/3.4/shutdown /usr/kde/3/share/config /usr/lib/X11/xkb /usr/share/config /usr/share/texmf/dvipdfm/config/ /usr/share/texmf/dvips/config/ /usr/share/texmf/tex/generic/config/ /usr/share/texmf/tex/platex/config/ /usr/share/texmf/xdvi/ /var/qmail/alias /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-O2 -march=pentium4 -fomit-frame-pointer -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoaddcvs autoconfig ccache distlocks sandbox sfperms strict" GENTOO_MIRRORS="http://distfiles.gentoo.org http://distro.ibiblio.org/pub/Linux/distributions/gentoo" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="x86 X aalib alsa apache2 apm arts audiofile avi bash-completion berkdb bitmap-fonts cdr crypt cscope cups curl directfb dvd emboss encode esd fam flac foomaticdb fortran gd gdbm gif gpm gtk gtk2 hal imagemagick imlib ipv6 java jpeg junit kde ldap libg++ libwww lm_sensors mad mikmod mmx mng motif mozilla mp3 mpeg mysql ncurses nls offensive ogg oggvorbis opengl oss pam pdflib perl php pic png pnp posix python qt quicktime rdesktop readline sdl slang sockets sox spell sqlite sse ssl svg svga sysvipc tcltk tcpd tetex theora tiff truetype truetype-fonts type1-fonts unicode usb vhosts vorbis wmf xine xml2 xmlrpc xmms xosd xpm xprint xsl xv xvid zlib userland_GNU kernel_linux elibc_glibc" Unset: ASFLAGS, CBUILD, CTARGET, LANG, LC_ALL, LDFLAGS, LINGUAS, PORTDIR_OVERLAY
Created attachment 61830 [details] Preprocessor output during the segfault. This is the preprocessor output that I got during the compile of glibc
Oh, I must be getting old, i forgot to mention which package i was trying to emerge now ;). The whole output that i have posted including the preprocessor output is what i got during a "emerge glibc", because after reading past bugs, some other problems were solved by it.
Folks, Here is some additional info to debug it further. I have poked around the files that cause the ICE and found that gcc segfaults only when -O2, -O1 or -O3 optimizations are passed. I tried with a couple of files, and found that -0[1-3] flags are also good to go. I tried compiling glibc and gcc without this flag to see if I could get a working configuration and saw that all configure scripts want to pass -O2 as standard to the Makefile. In fact glibc refuses to compile without any optimizations and gcc takes -O2 as a CFLAG even if I don't set it. Is this behaviour due to the ebuild? I dont think the vanilla versions of either one will make this modification.
Well, I fixed the issue myself. I build gcc using ./configure, make make install - this time keeping very sane CFLAGS. The build went fine, and this one was able to accept all my old CFLAGS. I have since recompiled glibc (just to be on the safe side) and have tested that my gcc is now able to compile stuff like it used to do. Please close this bug, unless you have an explanation for what happened and steps/patches to fix it. I doubt this being the case, then again, it could be because I did not have nptl support in glibc(I have enabled it now). Iam not sure about it, so I leave it to you guys.
The user resolved the issue already, see the previous comment.
