Minimal program file hello.cpp:
#include <iostream>
int main()
{
std::cout << "hello world\n";
return 0;
}
Compiled as follows:
# /var/scratch/lionelb/usr/gcc-4.2.0/bin/g++ -v -static-libgcc -O hello.cpp
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: /var/scratch/lionelb/usr/src/gcc-4.2.0/configure
--prefix=/var/scratch/lionelb/usr/gcc-4.2.0 --enable-languages=c,c++,fortran
--enable-version-specific-runtime-libs
--with-build-time-tools=/var/scratch/lionelb/usr/binutils-2.17/bin
--with-as=/var/scratch/lionelb/usr/binutils-2.17/bin/as
--with-ld=/var/scratch/lionelb/usr/binutils-2.17/bin/ld --enable-__cxa_atexit
Thread model: posix
gcc version 4.2.0
/var/scratch/lionelb/usr/gcc-4.2.0/libexec/gcc/x86_64-unknown-linux-gnu/4.2.0/cc1plus
-quiet -v -D_GNU_SOURCE hello.cpp -quiet -dumpbase hello.cpp -mtune=generic
-auxbase hello -O -version -o /tmp/ccCOiRAs.s
ignoring nonexistent directory
"/var/scratch/lionelb/usr/gcc-4.2.0/lib/gcc/x86_64-unknown-linux-gnu/4.2.0/../../../../x86_64-unknown-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/var/scratch/lionelb/usr/gcc-4.2.0/lib/gcc/x86_64-unknown-linux-gnu/4.2.0/include/c++
/var/scratch/lionelb/usr/gcc-4.2.0/lib/gcc/x86_64-unknown-linux-gnu/4.2.0/include/c++/x86_64-unknown-linux-gnu
/var/scratch/lionelb/usr/gcc-4.2.0/lib/gcc/x86_64-unknown-linux-gnu/4.2.0/include/c++/backward
/usr/local/include
/var/scratch/lionelb/usr/gcc-4.2.0/include
/var/scratch/lionelb/usr/gcc-4.2.0/lib/gcc/x86_64-unknown-linux-gnu/4.2.0/include
/usr/include
End of search list.
GNU C++ version 4.2.0 (x86_64-unknown-linux-gnu)
compiled by GNU C version 4.2.0.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 2397c1b5728582bf7ba9c1e7650657db
/var/scratch/lionelb/usr/binutils-2.17/bin/as -V -Qy -o /tmp/ccmsgJch.o
/tmp/ccCOiRAs.s
GNU assembler version 2.17 (x86_64-unknown-linux-gnu) using BFD version 2.17
/var/scratch/lionelb/usr/gcc-4.2.0/libexec/gcc/x86_64-unknown-linux-gnu/4.2.0/collect2
--eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2
/usr/lib/../lib64/crt1.o /usr/lib/../lib64/crti.o
/var/scratch/lionelb/usr/gcc-4.2.0/lib/gcc/x86_64-unknown-linux-gnu/4.2.0/crtbegin.o
-L/var/scratch/lionelb/usr/gcc-4.2.0/lib/gcc/x86_64-unknown-linux-gnu/4.2.0
-L/var/scratch/lionelb/usr/gcc-4.2.0/lib/gcc/x86_64-unknown-linux-gnu/4.2.0/../../../../lib64
-L/lib/../lib64 -L/usr/lib/../lib64
-L/var/scratch/lionelb/usr/gcc-4.2.0/lib/gcc/x86_64-unknown-linux-gnu/4.2.0/../../..
/tmp/ccmsgJch.o -lstdc++ -lm -lgcc -lgcc_eh -lc -lgcc -lgcc_eh
/var/scratch/lionelb/usr/gcc-4.2.0/lib/gcc/x86_64-unknown-linux-gnu/4.2.0/crtend.o
/usr/lib/../lib64/crtn.o
Compiles without error (note: the -static-libgcc is to work around a problem
reported in http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32415)
Running the executable gives:
# ./a.out
./a.out: /usr/lib64/libstdc++.so.6: version `GLIBCXX_3.4.9' not found (required
by ./a.out)
If compiled *without* the -O flag the program runs normally as expected.
Higher optimization levels cause the same error, but -Os does not.
I cannot reproduce the error with a simpler program.
gcc 4.1.2 configured identically does not exhibit the problem.
I find it puzzling that the error is reported for /usr/lib64/libstdc++.so.6,
since there is a libstdc++.so.6.0.9 (plus appropriate links) in
/var/scratch/lionelb/usr/gcc-4.2.0/lib/gcc/x86_64-unknown-linux-gnu/4.2.0
which appears before /usr/lib64 in the link line.
--
Summary: -O breaks executable (/usr/lib64/libstdc++.so.6: version
`GLIBCXX_3.4.9' not found)
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: lionelb dot nospam at gmail dot com
GCC build triplet: x86_64-unknown-linux-gnu
GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32425
