CS107 作业文件无法编译，缺少 expat.h 和 thread_107.h 文件

Question

我正在斯坦福在线旁听 cs107

我遇到的问题是作业 6，当我在终端中输入“make”时，会弹出错误消息。基本上，我错过了两个头文件，我猜这可以从预编译的 .lib 文件中获取。但不知怎的，它就是行不通。

这是原始 make 文件的一部分:

CFLAGS = -D_REENTRANT -g -Wall -D__ostype_is_$(OSTYPE)__ -std=gnu99 -I/usr/class/cs107/include/ -Wno-unused-function $(DFLAG)
LDFLAGS = -L/usr/class/cs107/assignments/assn-6-rss-news-search-lib/$(OSTYPE) -L/usr/class/cs107/lib -lexpat -lrssnews $(PLATFORM_LIBS) $(THREAD_LIBS)
PFLAGS= -linker=/usr/pubsw/bin/ld -best-effort -threads=yes -max-threads=1000

编辑:

当我说“即使没有线程实现，它也应该编译”时，我的意思是它应该在学生没有进一步线程实现的情况下编译。

这是线程的错误消息:

gcc -D_REENTRANT -g -Wall -D__ostype_is_linux__ -std=gnu99 -I/usr/class/cs107/include/ -Wno-unused-function -c -o rss-news-search.o rss-news-search.c
rss-news-search.c: In function ‘main’:
rss-news-search.c:109:3: warning: implicit declaration of function ‘InitThreadPackage’ [-Wimplicit-function-declaration]
gcc rss-news-search.o -D_REENTRANT -g -Wall -D__ostype_is_linux__ -std=gnu99 -I/usr/class/cs107/include/ -Wno-unused-function -L/home/h/cs107/assn-6-rss-news-search-lib/linux -L/usr/class/cs107/lib -L. -lexpat -lrssnews -lnsl -lpthread -lthread_107_linux -o rss-news-search
/usr/bin/ld: cannot find -lthread_107_linux
collect2: ld returned 1 exit status
make: *** [rss-news-search] Error 1

这是没有 $(THREAD_LIBS) 的错误消息:

gcc -D_REENTRANT -g -Wall -D__ostype_is_linux__ -std=gnu99 -I/usr/class/cs107/include/ -Wno-unused-function -c -o rss-news-search.o rss-news-search.c
rss-news-search.c: In function ‘main’:
rss-news-search.c:109:3: warning: implicit declaration of function ‘InitThreadPackage’ [-Wimplicit-function-declaration]
gcc rss-news-search.o -D_REENTRANT -g -Wall -D__ostype_is_linux__ -std=gnu99 -I/usr/class/cs107/include/ -Wno-unused-function -L/home/h/cs107/assn-6-rss-news-search-lib/linux -L/usr/class/cs107/lib -L. -lexpat -lrssnews -lnsl -lpthread  -o rss-news-search
rss-news-search.o: In function `main':
/home/h/cs107/assn-6-rss-news-search/rss-news-search.c:109: undefined reference to `InitThreadPackage'
collect2: ld returned 1 exit status
make: *** [rss-news-search] Error 1

在后一种情况下，如果我注释掉“InitThreadPackage”，它就可以正常编译。

Answer 1

这是编译项目的过程:

1. 创建文件 assn-6-rss-news-search/thread_107.h ，并将其放入其中:

   /* Empty header file */

2. 复制库 librssnews.a来自assn-6-rss-news-search-lib/linux/至assn-6-rss-news-search/

3. 修改文件rss-news-search.c通过注释对函数的调用:InitThreadPackage在线109:

   //InitThreadPackage(false);

4. 修改Makefile包含当前目录的路径(以便能够链接到您之前复制的库 librssnews.a):

行27应如下所示:

LDFLAGS = -L/usr/class/cs107/assignments/assn-6-rss-news-search-lib/$(OSTYPE) -L/usr/class/cs107/lib -L. -lexpat -lrssnews $(PLATFORM_LIBS) $(THREAD_LIBS)

然后:

make clean
make

编辑:

当您收到此错误时cannot find lthread_107_linux ，编辑您的 Makefile 以删除此 $(THREAD_LIBS)第27行:

LDFLAGS = -L/usr/class/cs107/assignments/assn-6-rss-news-search-lib/$(OSTYPE) -L/usr/class/cs107/lib -L. -lexpat -lrssnews $(PLATFORM_LIBS)