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Question

我想用libuv和http-parser构建一个网络服务器。

目前的项目结构是

Makefile 

/src 
    /main.c 

/deps 
    /libuv (git clone of libuv) 
    /http-parser (git clone of http-parser) 

main.c中我已经定义了以下包括：

#include <stdio.h> 
#include <stdlib.h> 
#include <string.h> 
#include "uv.h" 
#include "http_parser.h" 

和Makefile文件看起来像：

LDFLAGS = -L deps/libuv 

main: libuv http-parser 
    $(CC) src/main.c -o main.out deps/libuv/libuv.a deps/http-parser/http_parser.o $(LDFLAGS) 

libuv: 
    $(MAKE) -C deps/libuv libuv.a 

http-parser: 
    $(MAKE) -C deps/http-parser http_parser.o 

clean: 
    rm deps/libuv/libuv.a 
    rm deps/http-parser/http_parser.o 

这种情况发生在编译器尝试链接http_parser。

make -C deps/libuv libuv.a 
make[1]: `libuv.a' is up to date. 
make -C deps/http-parser http_parser.o 
make[1]: `http_parser.o' is up to date. 
cc src/main.c -o main.out deps/libuv/libuv.a deps/http-parser/http_parser.o 
src/main.c:5:10: fatal error: 'http_parser.h' file not found 
#include "http_parser.h" 
     ^
1 error generated. 
make: *** [main] Error 1 

当我删除了http_parser出了包括和Makefile的比我得到一个奇怪的libuv生成错误：

Undefined symbols for architecture x86_64: 
    "_CFArrayCreate", referenced from: 
     _uv__fsevents_init in libuv.a(fsevents.o) 
    "_CFRunLoopAddSource", referenced from: 
     _uv__cf_loop_runner in libuv.a(darwin.o) 
    "_CFRunLoopGetCurrent", referenced from: 
     _uv__cf_loop_runner in libuv.a(darwin.o) 
    "_CFRunLoopRemoveSource", referenced from: 
     _uv__cf_loop_runner in libuv.a(darwin.o) 
    "_CFRunLoopRun", referenced from: 
     _uv__cf_loop_runner in libuv.a(darwin.o) 
    "_CFRunLoopSourceCreate", referenced from: 
     _uv__platform_loop_init in libuv.a(darwin.o) 
    "_CFRunLoopSourceSignal", referenced from: 
     _uv__cf_loop_signal in libuv.a(darwin.o) 
    "_CFRunLoopStop", referenced from: 
     _uv__platform_loop_delete in libuv.a(darwin.o) 
    "_CFRunLoopWakeUp", referenced from: 
     _uv__cf_loop_signal in libuv.a(darwin.o) 
    "_CFStringCreateWithCString", referenced from: 
     _uv__fsevents_init in libuv.a(fsevents.o) 
    "_CFStringGetSystemEncoding", referenced from: 
     _uv__fsevents_init in libuv.a(fsevents.o) 
    "_FSEventStreamCreate", referenced from: 
     _uv__fsevents_init in libuv.a(fsevents.o) 
    "_FSEventStreamInvalidate", referenced from: 
     _uv__fsevents_close in libuv.a(fsevents.o) 
    "_FSEventStreamRelease", referenced from: 
     _uv__fsevents_close in libuv.a(fsevents.o) 
    "_FSEventStreamScheduleWithRunLoop", referenced from: 
     _uv__fsevents_schedule in libuv.a(fsevents.o) 
    "_FSEventStreamStart", referenced from: 
     _uv__fsevents_schedule in libuv.a(fsevents.o) 
    "_FSEventStreamStop", referenced from: 
     _uv__fsevents_close in libuv.a(fsevents.o) 
    "_kCFRunLoopDefaultMode", referenced from: 
     _uv__cf_loop_runner in libuv.a(darwin.o) 
     _uv__fsevents_schedule in libuv.a(fsevents.o) 
ld: symbol(s) not found for architecture x86_64 
clang: error: linker command failed with exit code 1 (use -v to see invocation) 
make: *** [main] Error 1 

我停留在这个问题从昨天起，在所有失去我的希望。 。

当前的Makefile的状态：

LDFLAGS = -Ldeps/libuv 
INCLFLAGS = -Ideps/http-parser 

main.o: libuv.a http-parser.o 
    $(CC) src/main.c $(INCLFLAGS) -o main.o deps/libuv/libuv.a deps/http-parser/http_parser.o $(LDFLAGS) 

libuv.a: 
    $(MAKE) -C deps/libuv libuv.a 

http-parser.o: 
    $(MAKE) -C deps/http-parser http_parser.o 

clean: 
    rm deps/libuv/libuv.a 
    rm deps/http-parser/http_parser.o 

详细输出：

#include "..." search starts here: 
#include <...> search starts here: 
deps/libuv 
deps/http-parser 
/usr/local/include 
/usr/bin/../lib/clang/4.2/include 
/usr/include 
/System/Library/Frameworks (framework directory) 
/Library/Frameworks (framework directory) 
End of search list. 
"/usr/bin/ld" -demangle -dynamic -arch x86_64 -macosx_version_min 10.8.0 -o main.o -Ldeps/libuv /var/folders/4l/zj55m1gn289f6v04zfbl59bm0000gn/T/main-sRhCLM.o deps/libuv/libuv.a deps/http-parser/http_parser.o -lSystem /usr/bin/../lib/clang/4.2/lib/darwin/libclang_rt.osx.a 
Undefined symbols for architecture x86_64: 
    "_CFArrayCreate", referenced from: 
     _uv__fsevents_init in libuv.a(fsevents.o) 
    "_CFRunLoopAddSource", referenced from: 
     _uv__cf_loop_runner in libuv.a(darwin.o) 

Answer 1

我怀疑http_parser.h是不是在同一个目录命名为main.c.要么在那里复制该文件，要么更新您的INCLUDE路径。

HTTP_PARSER_INCLUDE= -I/home/wherever/http_parser 

main: libuv http-parser 
    $(CC) src/main.c -o main.out $(HTTP_PARSER_INCLUDE) deps/libuv/libuv.a deps/http-parser/http_parser.o $(LDFLAGS) 

你得到尽可能消除http_parser.h的结果的其他错误很可能只是噪音，不干净的建设，开始用的结果。上面声明的你的“主要”规则构建“main.out”而不是“main”。这也可能与尝试建立无中生有的东西有关。

更新 - 您需要将​​添加到您的命令行以删除链接器错误。