code::blocks，如何将链接器选项`-lstdc++`放在编译命令的末尾？

Question

IDE 是 code::blocks ubuntu 18.04。工作区包含两个简单的项目。第一个是一个 c++ 静态库，只有一个 cpp 文件如下所示。

// try.cpp   -- The c++ static library is defined as:
# include <iostream>
extern "C"
{
    void shownum ( int n );
}

void shownum ( int n ){
    using namespace std;
    std::cout<<n<<endl;
}

构建日志是：

-------------- Build: Debug in try (compiler: GNU GCC Compiler)---------------

g++ -Wall -fexceptions  -c /home/try/try.cpp -o obj/Debug/try.o
rm -f bin/Debug/libtry.a
ar -r -s bin/Debug/libtry.a obj/Debug/try.o
ar: creating bin/Debug/libtry.a
Output file is bin/Debug/libtry.a with size 2.78 KB
Process terminated with status 0 (0 minute(s), 1 second(s))
0 error(s), 0 warning(s) (0 minute(s), 1 second(s))

生成文件libtry.a。似乎一切都OK。另一个项目有一个fortran程序如下：

! main.f90  -- The main program by fortran is：
program main
    implicit none
    integer*4 y
    interface
      subroutine shownum(np) bind(C)
        use, intrinsic :: iso_c_binding
        implicit none
        integer (c_int), value :: np
      end subroutine shownum
    end interface
    y=5
    call shownum(y)
end

C++ 库 libtry.a 通过设置 build options-->linker settings-->link libraries 链接到这个 Fortran 项目。编译fortran工程出现错误：

-------------- Build: Debug in try2 (compiler: GNU Fortran Compiler)---------------

gfortran -Jobj/Debug/ -Wall  -g     -c /home/try2/main.f95 -o obj/Debug/main.o
gfortran  -o bin/Debug/try2 obj/Debug/main.o   ../try/bin/Debug/libtry.a
../try/bin/Debug/libtry.a(try.o): In function `shownum':
try.cpp:(.text+0x13): undefined reference to `std::cout'
try.cpp:(.text+0x18): undefined reference to `std::ostream::operator<<(int)'
try.cpp:(.text+0x22): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&)'
try.cpp:(.text+0x2d): undefined reference to `std::ostream::operator<<(std::ostream& (*)(std::ostream&))'
../try/bin/Debug/libtry.a(try.o): In function `__static_initialization_and_destruction_0(int, int)':
try.cpp:(.text+0x59): undefined reference to `std::ios_base::Init::Init()'
try.cpp:(.text+0x6e): undefined reference to `std::ios_base::Init::~Init()'
collect2: error: ld returned 1 exit status
Process terminated with status 1 (0 minute(s), 1 second(s))
6 error(s), 0 warning(s) (0 minute(s), 1 second(s))

现在问题更清楚了。可以通过改变

来解决

gfortran  -o bin/Debug/try2 obj/Debug/main.o  -lstdc++  ../try/obj/Debug/try.o

到

gfortran  -o bin/Debug/try2 obj/Debug/main.o  ../try/obj/Debug/try.o -lstdc++

。但是我不知道如何在code::blocks中设置它。如果有人可以提供任何建议，我将不胜感激。

Answer 1

通过设置settings->compiler->other settings->advanced options解决，改变命令行宏命令。然后将链接器选项 -lstdc++ 放在命令的末尾。问题消失。

code::blocks，如何将链接器选项`-lstdc++`放在编译命令的末尾？

code::blocks, how to put the linker option `-lstdc++` at the end of the compiler command?

c++

fortran

codeblocks

mixed