g ++链接问题:在函数`_start'中:(。text + 0x20):对'main'的未定义引用(g++ link problems: In function `_start': (.text+0x20): undefined reference to `main')
我得到一个未定义的主要错误引用 - 即使我已经定义了main,和(AFAICT),我已正确链接它。 这是我的代码和我使用的命令:
// ################################################ //proj1.h #ifndef __SCRATCH_PROJ1_H #define __SCRATCH_PROJ1_H int addOne(int i); #endif /*__SCRATCH_PROJ1_H */ // ################################################ //proj1.cpp #include "proj1.h" int addOne(int i){ return i+1; } // ################################################ //proj1_unittest.cpp #include "proj1.h" #include "gtest/gtest.h" // Test Function TEST(addOneTest, Positive) { EXPECT_EQ(1,addOne(0)); EXPECT_EQ(2,addOne(1)); EXPECT_EQ(40320, addOne(40319)); } TEST(addOneTest, Negative) { EXPECT_FALSE(addOneTest(-1)); } GTEST_API_ int main(int argc, char **argv) { testing::InitGoogleTest(&argc, argv); return RUN_ALL_TESTS(); }这是控制台输出:
$ g++ -isystem -pthread -c ${SOURCE_DIR}/proj1.c -o ${SOURCE_DIR}/proj1.o $ g++ -o ${SOURCE_DIR}/mytest ${SOURCE_DIR}/*.o -L${GTEST_DIR} libgtest.a /usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu/crt1.o: In function `_start': (.text+0x20): undefined reference to `main' collect2: ld returned 1 exit status为什么链接器找不到main()函数?
I am getting an undefined reference to main error - even though I have defined main, and (AFAICT), I have linked it correctly. Here is my code and the commands I used:
// ################################################ //proj1.h #ifndef __SCRATCH_PROJ1_H #define __SCRATCH_PROJ1_H int addOne(int i); #endif /*__SCRATCH_PROJ1_H */ // ################################################ //proj1.cpp #include "proj1.h" int addOne(int i){ return i+1; } // ################################################ //proj1_unittest.cpp #include "proj1.h" #include "gtest/gtest.h" // Test Function TEST(addOneTest, Positive) { EXPECT_EQ(1,addOne(0)); EXPECT_EQ(2,addOne(1)); EXPECT_EQ(40320, addOne(40319)); } TEST(addOneTest, Negative) { EXPECT_FALSE(addOneTest(-1)); } GTEST_API_ int main(int argc, char **argv) { testing::InitGoogleTest(&argc, argv); return RUN_ALL_TESTS(); }Here is the console output:
$ g++ -isystem -pthread -c ${SOURCE_DIR}/proj1.c -o ${SOURCE_DIR}/proj1.o $ g++ -o ${SOURCE_DIR}/mytest ${SOURCE_DIR}/*.o -L${GTEST_DIR} libgtest.a /usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu/crt1.o: In function `_start': (.text+0x20): undefined reference to `main' collect2: ld returned 1 exit statusWhy is the main() function not been found by the linker?
最满意答案
据我所知,你没有编译文件proj1_unittest.cpp(因为你的代码注释有它)/ proj1_unittest.c(正如你的控制台输出暗示)。
As far as I can see you are not compiling file proj1_unittest.cpp (as your code comment has it) / proj1_unittest.c (as your console output implies).
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