g++ compilation problem

[smeaglegolum]

Hi,

I'm compiling a bunch of files using g++. The files compile fine in Ubuntu but they won't compile in CentOS (5.8).

[Athar]

-

[smeaglegolum]

Sorry, the first post got submitted accidentally. This is my full post

Hi,

I'm compiling a bunch of files using g++. The files compile fine in Ubuntu but they won't compile in CentOS (5.8).

I get this error when I try to compile

g++ -c -Wall -std=c++0x -Wformat src/handler.cpp -o src/handler.o
g++ src/handler.o -lpthread -lm -o bin/xyz

src/handler.o: In function `ApplicationHandler::CheckInput(bool*)':
handler.cpp:(.text+0x2d93): undefined reference to `std::basic_ifstream<char, std::char_traits<char> >::basic_ifstream(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::_Ios_Openmode)'
collect2: ld returned 1 exit status

I'm using g++44 to compile.

Any ideas as to why its happening?

PS: I'm using same commands in both Ubuntu and CentOS. The only difference is in linux distribution. nothing else.

[Athar]

Does this still happen when you perform the compiling and linking steps together?

[smeaglegolum]

Yes.

These are my gcc versions from Ubuntu and CentOS

gcc version 4.4.6 20110731 (Red Hat 4.4.6-3) (GCC)
gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)

There is no problem with the c files per se but only problem is with the linux distribution because it compiles fine in Ubuntu but not CentOS.

[vince1027]

An undefined reference to something means that you are missing a library to link to. Quite possibly (but highly unlikely) that the gcc for CentOS is not built/installed correctly since the undefined reference should be part of libstdc++.

Can you try the following command when linking and show the results (caution: it may be very long, use the program output tags):

g++ -v src/handler.o -lpthread -lm -o bin/xyz

[smeaglegolum]

Hi,

I tried it and I got the following error after running the command as you suggested

g++ -v src/handler.o -lpthread -lm -o bin/xyz

Using built-in specs.
Target: x86_64-redhat-linux6E
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --disable-gnu-unique-object --with-as=/usr/libexec/binutils220/as --enable-languages=c,c++,fortran --disable-libgcj --with-mpfr=/builddir/build/BUILD/gcc-4.4.6-20110824/obj-x86_64-redhat-linux6E/mpfr-install/ --with-ppl=/builddir/build/BUILD/gcc-4.4.6-20110824/obj-x86_64-redhat-linux6E/ppl-install --with-cloog=/builddir/build/BUILD/gcc-4.4.6-20110824/obj-x86_64-redhat-linux6E/cloog-install --with-tune=generic --with-arch_32=i586 --build=x86_64-redhat-linux6E
Thread model: posix
gcc version 4.4.6 20110731 (Red Hat 4.4.6-3) (GCC) 
COMPILER_PATH=/usr/libexec/gcc/x86_64-redhat-linux6E/4.4.6/:/usr/libexec/gcc/x86_64-redhat-linux6E/4.4.6/:/usr/libexec/gcc/x86_64-redhat-linux6E/:/usr/lib/gcc/x86_64-redhat-linux6E/4.4.6/:/usr/lib/gcc/x86_64-redhat-linux6E/:/usr/libexec/gcc/x86_64-redhat-linux6E/4.4.6/:/usr/libexec/gcc/x86_64-redhat-linux6E/:/usr/lib/gcc/x86_64-redhat-linux6E/4.4.6/:/usr/lib/gcc/x86_64-redhat-linux6E/
LIBRARY_PATH=/usr/lib/gcc/x86_64-redhat-linux6E/4.4.6/:/usr/lib/gcc/x86_64-redhat-linux6E/4.4.6/:/usr/lib/gcc/x86_64-redhat-linux6E/4.4.6/../../../../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/usr/lib/gcc/x86_64-redhat-linux6E/4.4.6/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-o' 'bin/xyz' '-shared-libgcc' '-mtune=generic'
 /usr/libexec/gcc/x86_64-redhat-linux6E/4.4.6/collect2 --eh-frame-hdr -m elf_x86_64 --hash-style=gnu -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o bin/xyz /usr/lib/gcc/x86_64-redhat-linux6E/4.4.6/../../../../lib64/crt1.o /usr/lib/gcc/x86_64-redhat-linux6E/4.4.6/../../../../lib64/crti.o /usr/lib/gcc/x86_64-redhat-linux6E/4.4.6/crtbegin.o -L/usr/lib/gcc/x86_64-redhat-linux6E/4.4.6 -L/usr/lib/gcc/x86_64-redhat-linux6E/4.4.6 -L/usr/lib/gcc/x86_64-redhat-linux6E/4.4.6/../../../../lib64 -L/lib/../lib64 -L/usr/lib/../lib64 -L/usr/lib/gcc/x86_64-redhat-linux6E/4.4.6/../../..  src/handler.o -lpthread -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /usr/lib/gcc/x86_64-redhat-linux6E/4.4.6/crtend.o /usr/lib/gcc/x86_64-redhat-linux6E/4.4.6/../../../../lib64/crtn.o
src/handler.o: In function `ApplicationHandler::CheckInput(bool*)':
handler.cpp:(.text+0x2d93): undefined reference to `std::basic_ifstream<char, std::char_traits<char> >::basic_ifstream(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::_Ios_Openmode)'
collect2: ld returned 1 exit status
make: *** [bin/xyz] Error 1

[smeaglegolum]

SOLVED

Ok the problem seems with the gcc package in CentOS. The gcc package was old while the 'c files' require latest gcc package. I had to compile latest gcc from source since later than gcc4.4 was not available with Yum install.

Thanks.