Bug#321023: gcc-4.0 segfaults when compiling ltdl.c with -O

[Dennis Brakhane]

Subject: gcc-4.0 segfaults when compiling libtool's ltdl.c with -O
Package: gcc-4.0
Version: 4.0.1-3
Severity: important

gcc 4.0 segfaults when compiling ltdl.c with optimizations turned
on. I doubt that this bug is specific to that particular file, but I
have yet to find a minimal example.

$ gcc -c -DHAVE_CONFIG_H -v -save-temps -I. -O2 ltdl.c Using built-in specs.
Target: i486-linux-gnu

Thread model: posix
gcc version 4.0.2 20050725 (prerelease) (Debian 4.0.1-3)
[...]

GNU C version 4.0.2 20050725 (prerelease) (Debian 4.0.1-3) (i486-linux-gnu)

GGC heuristics: --param ggc-min-expand=47 --param ggc-min-heapsize=31997
ltdl.c: In function 'presym_free_symlists':
ltdl.c:1979: internal compiler error: Speicherzugriffsfehler

(gcc version 4.1.0 20050726 (experimental) does seem to work fine)

The segfault does occur with -O and -O2, but not with -O0.
ltdl.i is attached.

-- System Information:
Debian Release: testing/unstable
 APT prefers unstable
 APT policy: (500, 'unstable')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/dash
Kernel: Linux 2.6.12-1-686


Versions of packages gcc-4.0 depends on:

ii  cpp-4.0                     4.0.1-3      The GNU C preprocessor

ii  libgcc1                     1:4.0.1-3    GCC support library

Versions of packages gcc-4.0 recommends:


-- no debconf information

Configured with: ../src/configure -v --enable-languages=c,c++,java,f95,objc,ada,treelang --prefix=/usr --enable-shared --with-system-zlib --libexecdir=/usr/lib --enable-nls --without-included-gettext --enable-threads=posix --program-suffix=-4.0 --enable-__cxa_atexit --enable-libstdcxx-allocator=mt --enable-clocale=gnu --enable-libstdcxx-debug --enable-java-gc=boehm --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.4.2-gcj-4.0-1.4.2.0/jre --enable-mpfr --disable-werror --enable-checking=release i486-linux-gnu /usr/lib/gcc/i486-linux-gnu/4.0.2/cc1 -fpreprocessed ltdl.i -quiet -dumpbase ltdl.c -mtune=i486 -auxbase ltdl -O2 -version -o ltdl.s compiled by GNU C version 4.0.2 20050725 (prerelease) (Debian 4.0.1-3). Locale: [EMAIL PROTECTED], [EMAIL PROTECTED] (charmap=ANSI_X3.4-1968) (ignored: LC_ALL set to C) ii binutils 2.16.1-2 The GNU assembler, linker and bina ii gcc-4.0-base 4.0.1-3 The GNU Compiler Collection (base ii libc6 2.3.2.ds1-22 GNU C Library: Shared libraries an ii libc6-dev 2.3.2.ds1-22 GNU C Library: Development Librari ii libmudflap0-dev 4.0.1-3 GCC mudflap support libraries (dev

ltdl.i.bz2
Description: application/bzip