Using ofstream on AIX

Question

I am trying to write a simple C++ program on an AIX Box. The program is given below:

# include <iostream>
# include <fstream>
using namespace std ;


int main()
{
    ofstream of ;
    of.open("license.txt") ;
    of<<"hello"<<endl ;
    of.close() ;
}

My LDFLAGS has is set as following:

-maix64 -L/disk3/TOOLS/GCCTools/gcc-4.5.1/lib/ppc64 \
-L/disk3/TOOLS/GCCTools/gcc-4.5.1/lib/gcc/powerpc-ibm-aix6.1.0.0/4.5.1/ppc64 \
-L/disk3/TOOLS/GCCTools/gcc-4.5.1/lib/gcc/powerpc-ibm-aix6.1.0.0/4.5.1 \
-L/disk3/TOOLS/OPENSSL/lib

CFLAGS is:

-O2 -maix64 -I/disk3/TOOLS/OPENSSL/include -D_ALL_SOURCE -D_XOPEN_SOURCE \
-D_XOPEN_SOURCE_EXTENDED -DSS_64BIT_SERVER -D_POSIX_SOURCE -D__64BIT__ \
-I/disk3/TOOLS/OPENSSL/include -I/usr/include \
-I/disk3/TOOLS/GCCTools/gcc-4.5.1/lib/gcc/powerpc-ibm-aix6.1.0.0/4.5.1/include

The program compiles fine. But when I try to run the same, the program comes out with a segmentation fault. I ran the same with gdb and found the following issue when I use ofstream:

Program received signal SIGSEGV, Segmentation fault.
0x09000000036107c4 in std::locale::operator=(std::locale const&) (this=
findvar.c:706: internal-error: value_from_register: Value not stored anywhere!

Any idea on why this is happening? Any help is appreciated :)

Note: fstream in itself works...

Answer 1

I meet the same error. The key points to repro the error are: 1 use std::stream(such as std::ofstream) in share libary; 2 use pthread function (such as pthread_self) in share library; 3 use "-O2" to optimize code. Then it shows "Segmentation fault (core dumped)".

AIX provides 2 versions(64bit) of libstdc++.a. (see http://www.perzl.org/aix/index.php?n=Main.GCCBinariesVersionNeutral) 64-bit compilation, non-thread-safe (<prefix>/ppc64) 64-bit compilation, thread-safe (<prefix>/pthread/ppc64)

My solution is: change LIBPATH to use "<prefix>/pthread/ppc64" version. such as set LIBPATH as "/opt/freeware/lib/gcc/powerpc-ibm-aix6.1.0.0/4.6.1/pthread/ppc64/"

It works well in my machine.