调用C ++函数的Fortran程序编译错误

Question

I'm trying to link a C++ function at compile time into a Fortran program. I'm compiling with mpif90 using a make file. I add the C++ object file to object files list within the latter. The function compiles fine on its own via

g++ -c -o quenchf.o quenchf.cpp

but when I add the .o file to the make file for my Fortran program file I get the error:

quenchf.o: In function Optim::Optim(double, double, int, int)': quenchf.cpp:(.text+0x1348): undefined reference to operator new[](unsigned long)' quenchf.cpp:(.text+0x1359): undefined reference to operator new[](unsigned long)' quenchf.cpp:(.text+0x136d): undefined reference to operator new[](unsigned long)' quenchf.cpp:(.text+0x1381): undefined reference to operator new[](unsigned long)' quenchf.cpp:(.text+0x1395): undefined reference to operator new[](unsigned long)' quenchf.o:quenchf.cpp:(.text+0x13a9): more undefined references to operator new[](unsigned long)' follow quenchf.o:(.eh_frame+0x13): undefined reference to __gxx_personality_v0' make: * [ljnpt.exe] Error 1

Do I need to link in a C++ to Fortran library? I instantiate a C++ object in the c function so perhaps this is causing a problem.

Thanks for any help-

Answer 1

You have not linked to the C++ runtime (which provides stuff like operator new[](unsigned long) ). Trouble is, you'll need both the C++ and the Fortran runtime, and I'm not sure how to accomplish that, but there must be a way with the linker flags.