function.cpp -> 编译为 function.o,然后编译为 libFunction.so
#define PASTEHELPER(a,b) a ## b
#define PASTE(a,b) PASTEHELPER(a,b)
void PASTE(My,Function)() { .... }
main.cpp -> 编译为 main.o。但是链接时出错
void MyFunction();
g++ 中的链接错误。(但是,在 Visual Studio 中成功)
g++ -mtune=i686 -MP -MMD -MT .o -Wextra -Woverloaded-virtual -Wno-sign-compare -Wno-conversion -Wno-missing-field-initializers -O3 -DNDEBUG -fno-strict-aliasing -fPIC -fdiagnostics-show-option -DPROJECT=MyProjec -o /mypath main.o -L.. -L/sbcimp/run/pd/gcc/32-bit/4.4.2/lib/gcc/i686-pc-linux-gnu/4.4.2 -L/sbcimp/run/pd/gcc/32-bit/4.4.2/lib -lFunction -pthread -L/sbcimp/run/pd/python/2.7.1/lib -lpython2.7 -l util -L/sbcimp/run/pd/boost/32-bit/1.47.0_gcc4.4.2/lib -lboost_filesystem -lboost_thread -lboost_regex -lboost_system -Wl,-rpath,/sbcimp/run/pd/boost/32-bit/1.47.0_gcc4.4.2/lib -L/sbcimp/run/pd/apache_xerces-c/32-bit/3.1.1_mt_gcc4.4.2/lib -lxerces-c -Wl,-rpath,/sbcimp/run/pd/apache_xerces-c/32-bit/3.1.1_mt_gcc4.4.2/lib -ldl -Wl,-z,origin -Wl,-rpath,'$ORIGIN' -Wl,-rpath,/sbcimp/run/pd/gcc/32-bit/4.4.2/lib/gcc/i686-pc-linux-gnu/4.4.2,-rpath,/sbcimp/run/pd/gcc/32-bit/4.4.2/lib,-soname,MyProject
main.cpp: undefined reference to 'MyFunction'.
该函数未在任何 .h 文件中定义。这是问题吗?如果需要在.h中声明函数,怎么写?