Linux 对`dlopen'的未定义引用
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undefined reference to `dlopen'
提问by Anixx
I have a program that does not build with modern GCC with the foollowing output:
我有一个程序不是用现代 GCC 构建的，输出是愚蠢的：
gcc -I/usr/lib/qt3/include -I/opt/kde3/include/ -fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables -fasynchronous-unwind-tables -lqt-mt -ldl -L/usr/lib/qt3/lib64 -o autocheck autocheck.cpp
autocheck.cpp: In function 'int main(int, char**)':
autocheck.cpp:64:62: warning: too many arguments for format
autocheck.cpp:79:79: warning: too many arguments for format
/tmp/ccOFReGf.o: In function `main':
autocheck.cpp:(.text+0x244): undefined reference to `dlopen'
autocheck.cpp:(.text+0x2e1): undefined reference to `dlerror'
collect2: ld returned 1 exit status
I searched the Internet for advise but only found a recommendation to add -ldl to the linker. But this does not help here. What should I do?
我在互联网上搜索了建议，但只找到了将 -ldl 添加到链接器的建议。但这在这里没有帮助。我该怎么办？
采纳答案by Anixx
Move autocheck.cpp so that it is before the libraries in your command. Libraries are only searched for things that need resolving in files that appear before them. So your command should look like this:
移动 autocheck.cpp 使其位于命令中的库之前。库只搜索出现在它们之前的文件中需要解析的内容。所以你的命令应该是这样的：
gcc autocheck.cpp -I/usr/lib/qt3/include -I/opt/kde3/include/ -fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables -fasynchronous-unwind-tables -lqt-mt -ldl -L/usr/lib/qt3/lib64 -o autocheck
