1

我无法在使用 g++ 编译的程序中链接使用 gcc 编译的共享库。我有一个使用以下命令通过 gcc 编译的共享库:

build-library: activate-library-mode activate-debug-mode build-headers build-c-files build-exe-files
@echo -e $(cyan)generating shared library...$(plain)
@for exefile in $(exefiles); do\
    echo "$(CC) $(DEBUG) $(EXELIBFLAG) -o $(BINDIR)lib`basename $$exefile .c`.so $(wildcard $(OBJDIR)*.o)";\
    $(CC) $(DEBUG) $(EXELIBFLAG) -o $(BINDIR)lib`basename $$exefile .c`.so $(wildcard $(OBJDIR)*.o);\
done

在哪里:

  • 抄送=GCC
  • 调试=-g
  • EXELIBFLAG=-共享
  • BINDIR=bin/
  • exefiles=src/main.c
  • *.o 文件使用 -fPIC、-g、-Wall 一些 -I 和 -c 选项编译

因此,结果调用是:

gcc -g -shared -o bin/libmain.so obj/ClassElement.o obj/ClassHashTable.o obj/ClassHTCell.o obj/IdentifierList.o obj/LabelClassType.o obj/LabelHashTable.o obj/LabelHTCell.o obj/Label.o obj/lexer.o obj/lex-tools.o obj/LexVal.o obj/LocalResourceElement.o obj/LocalResourceHashTable.o obj/LocalResourceHTCell.o obj/main.o obj/main-tools.o obj/memory-tools.o obj/NodeType.o obj/parser.o obj/parser-tools.o obj/PassMode.o obj/ResourceClassType.o obj/ResourceElement.o obj/ResourceHashTable.o obj/ResourceHTCell.o obj/schemaClassType.o obj/schema.o obj/semantic.o obj/SyntaxNode.o

我在 LD_LIBRARY_PATH 中添加了共享库的路径,仅用于测试目的:

LD_LIBRARY_PATH=/home/koldar/Documents/git/Kaboom/custom-object-language/CustomProgrammingLanguage/bin:
export LD_LIBRARY_PATH

然后该库由以下程序使用:

#include "Label.h"

int main(){
    Plabel l=initLabel("hello",LABEL_PACKAGE); //use library function
    printf("OK.\n");
    return 0;
}

这个程序是用g++通过命令编译的:

g++ -I /home/koldar/Documents/git/Kaboom/custom-object-language/CustomProgrammingLanguage/include/ -I /home/koldar/Documents/git/Kaboom/custom-object-language/KaboomTest/cute/ -L /media/Dati/Users/Koldar/Documents/git/Kaboom/custom-object-language/CustomProgrammingLanguage/bin -l main test.c -o "KaboomTest"

问题是 g++ 打印出错误:

test.c: In function ‘int main()’:
test.c:4: warning: deprecated conversion from string constant to ‘char*’
/tmp/ccF7XCBs.o: In function `main':
test.c:(.text+0x19): undefined reference to `initLabel(char*, LabelClassType)'
collect2: ld returned 1 exit status

真正的问题是,如果我用 gcc 编译 test.c,程序就可以正常工作:

gcc -I /home/koldar/Documents/git/Kaboom/custom-object-language/CustomProgrammingLanguage/include/ -I /home/koldar/Documents/git/Kaboom/custom-object-language/KaboomTest/cute/ -L /media/Dati/Users/Koldar/Documents/git/Kaboom/custom-object-language/CustomProgrammingLanguage/bin -l main test.c -o "KaboomTest"
koldar@Octav:~/Documents/git/Kaboom/custom-object-language/KaboomTest$ ./KaboomTest
OK.
koldar@Octav:~/Documents/git/Kaboom/custom-object-language/KaboomTest$ 

现在我很确定我可以在 g++ 编译程序中链接 gcc 编译的共享库,但我该怎么做呢?感谢您的回答,对不起我的英语不好

4

1 回答 1

7
extern "C"
{
#include "Label.h"
}

像这样。

于 2013-11-15T08:38:08.840 回答