Why do I receive C++ linking errors using the MATLAB Compiler on Redhat/Mandrake Linux?

Why do I receive C++ linking errors using the MATLAB Compiler on Redhat/Mandrake Linux?

When I do the following:

 /usr/matlab/bin/mbuild -v ex1.cpp

I receive the following errors:

 ex1.o(.text+0x41): In function `main':

 : undefined reference to `mwArray::mwArray[in-charge](int, int, double*, double*, int)'ex1.o(.text+0x5a): In function `main':

 : undefined reference to `mwArray::mwArray[in-charge](int, int, double*, double*, int)'ex1.o(.text+0x68): In function `main':

 : undefined reference to `mwArray::Write(std::basic_ostream<char, std::char_traits<char> >&) const'ex1.o(.text+0x88): In function `main':

 : undefined reference to `mwArray::Write(std::basic_ostream<char, std::char_traits<char> >&) const'ex1.o(.text+0xcd): In function `main':

 : undefined reference to `mwArray::Read(std::basic_istream<char, std::char_traints<char> >&, int)'ex1.o(.text+0xdb): In function `main':

 : undefined reference to `mwArray::Write(std::basic_ostream<char, std::char_traits<char> >&) const'ex1.o(.text+0x25d): In function _static_initialization_and_destruction_0(int, int)':

 : undefined reference to `mwLibraryInitBuiltins::mwLibraryInitBuiltins[in-charge]()'ex1.o(.text+0x2bc): In function `__tcf_0':

 : undefined reference to `mwLibraryInitBuiltins::~mwLibraryInitBuiltins [in-charge]()'collect2

 : ld returned 1 exit status  

 mbuild: link of 'ex1' failed.

Or, I might see:

 /usr/lib/libc_nonshared.a(elf-init.oS): In function `__libc_csu_init': 

 elf-init.oS(.text+0xb): undefined reference to `__init_array_end'

 elf-init.oS(.text+0x10): undefined reference to `__init_array_start'

 elf-init.oS(.text+0x23): undefined reference to `__init_array_start'/usr/lib/libc_nonshared.a(elf-init.oS): In function `__libc_csu_fini':

 elf-init.oS(.text+0x36): undefined reference to `__fini_array_end'

 elf-init.oS(.text+0x3b): undefined reference to `__fini_array_start'

Answer 1

[MathWorks Support Team]

This problem is caused by the iostream C++ library change between the 2.95 and 3.x versions of g++ (g++ 2.95 was used for our development of MATLAB 6.5 (R13)). You should change to gcc/g++ 2.95 in order to compile and link without errors.

Beware of using g++/gcc 2.96, which is included in several popular linux distributions. We have had users report problems when attempting to use gcc/g++ 2.96. For more information, see the GNU announcement about gcc/g++ 2.96:

http://gcc.gnu.org/gcc-2.96.html