使用QT Creator查看并调试nginx源码
我的wp博客，欢迎来围观 http://zt2peilong.sinaapp.com/
1.前言
由于原先以前被vs2008以及eclipse宠坏了，vi使用又不熟悉，本来想好好学习nginx源码的我很是拙计，我亟需一个IDE来阅读以及调试源代码，于是我看上了QtCreator，，于是本博文就是介绍如何把nginx源码搞成qt creator工程。
2.建立.pro文件
我们要先学习一下QT Creator的工程文件.pro，因为QTCreator的qmake按照.pro文件生成Makefile的。
现在我们先来看看我们需要用到的.pro配置项
配置项的格式是：key = value
我们需要的key如下
- TARGET = value这个配置项的意义是QTCreator最后生成的名字叫做“value”的可执行程序
- DESTDIR = destdir 这个配置项的意义是QTCreator编译过程中的*.o还有可执行程序，全部放到destdir这个文件夹下面
- LIBS = value 这个配置项的意义是在编译过程中链接的库（这个最初把我坑了一小下）
- INCLUDEPATH = dir 这个配置项的意思是相关库的头文件目录
- HEADERS = value 这个是源代码中的.h文件
- SOURCES = value 这个是源代码中的.c文件
TARGET = nginx
DESTDIR = ./objs
LIBS = -lpthread -lcrypt -lpcre -lcrypto -lcrypto -lz
INCLUDEPATH += \
src/core \
src/event \
src/event/modules \
src/os/unix \
src/http/modules \
src/http \
objs
HEADERS = src/core/nginx.h \
src/core/ngx_config.h \
src/core/ngx_core.h \
src/core/ngx_log.h \
src/core/ngx_palloc.h \
src/core/ngx_array.h \
src/core/ngx_list.h \
src/core/ngx_hash.h \
src/core/ngx_buf.h \
src/core/ngx_queue.h \
src/core/ngx_string.h \
src/core/ngx_parse.h \
src/core/ngx_inet.h \
src/core/ngx_file.h \
src/core/ngx_crc.h \
src/core/ngx_crc32.h \
src/core/ngx_murmurhash.h \
src/core/ngx_md5.h \
src/core/ngx_sha1.h \
src/core/ngx_rbtree.h \
src/core/ngx_radix_tree.h \
src/core/ngx_slab.h \
src/core/ngx_times.h \
src/core/ngx_shmtx.h \
src/core/ngx_connection.h \
src/core/ngx_cycle.h \
src/core/ngx_conf_file.h \
src/core/ngx_resolver.h \
src/core/ngx_open_file_cache.h \
src/core/ngx_crypt.h \
src/event/ngx_event.h \
src/event/ngx_event_timer.h \
src/event/ngx_event_posted.h \
src/event/ngx_event_busy_lock.h \
src/event/ngx_event_connect.h \
src/event/ngx_event_pipe.h \
src/os/unix/ngx_time.h \
src/os/unix/ngx_errno.h \
src/os/unix/ngx_alloc.h \
src/os/unix/ngx_files.h \
src/os/unix/ngx_channel.h \
src/os/unix/ngx_shmem.h \
src/os/unix/ngx_process.h \
src/os/unix/ngx_setaffinity.h \
src/os/unix/ngx_setproctitle.h \
src/os/unix/ngx_atomic.h \
src/os/unix/ngx_gcc_atomic_x86.h \
src/os/unix/ngx_thread.h \
src/os/unix/ngx_socket.h \
src/os/unix/ngx_os.h \
src/os/unix/ngx_user.h \
src/os/unix/ngx_process_cycle.h \
src/os/unix/ngx_linux_config.h \
src/os/unix/ngx_linux.h \
src/core/ngx_regex.h \
objs/ngx_auto_config.h \
src/http/ngx_http.h \
src/http/ngx_http_request.h \
src/http/ngx_http_config.h \
src/http/ngx_http_core_module.h \
src/http/ngx_http_cache.h \
src/http/ngx_http_variables.h \
src/http/ngx_http_script.h \
src/http/ngx_http_upstream.h \
src/http/ngx_http_upstream_round_robin.h \
src/http/ngx_http_busy_lock.h \
src/http/modules/ngx_http_ssi_filter_module.h
SOURCES = src/core/nginx.c \
src/core/ngx_log.c \
src/core/ngx_palloc.c \
src/core/ngx_array.c \
src/core/ngx_list.c \
src/core/ngx_hash.c \
src/core/ngx_buf.c \
src/core/ngx_queue.c \
src/core/ngx_output_chain.c \
src/core/ngx_string.c \
src/core/ngx_parse.c \
src/core/ngx_inet.c \
src/core/ngx_file.c \
src/core/ngx_crc32.c \
src/core/ngx_murmurhash.c \
src/core/ngx_md5.c \
src/core/ngx_rbtree.c \
src/core/ngx_radix_tree.c \
src/core/ngx_slab.c \
src/core/ngx_times.c \
src/core/ngx_shmtx.c \
src/core/ngx_connection.c \
src/core/ngx_cycle.c \
src/core/ngx_spinlock.c \
src/core/ngx_cpuinfo.c \
src/core/ngx_conf_file.c \
src/core/ngx_resolver.c \
src/core/ngx_open_file_cache.c \
src/core/ngx_crypt.c \
src/event/ngx_event.c \
src/event/ngx_event_timer.c \
src/event/ngx_event_posted.c \
src/event/ngx_event_busy_lock.c \
src/event/ngx_event_accept.c \
src/event/ngx_event_connect.c \
src/event/ngx_event_pipe.c \
src/os/unix/ngx_time.c \
src/os/unix/ngx_errno.c \
src/os/unix/ngx_alloc.c \
src/os/unix/ngx_files.c \
src/os/unix/ngx_socket.c \
src/os/unix/ngx_recv.c \
src/os/unix/ngx_readv_chain.c \
src/os/unix/ngx_udp_recv.c \
src/os/unix/ngx_send.c \
src/os/unix/ngx_writev_chain.c \
src/os/unix/ngx_channel.c \
src/os/unix/ngx_shmem.c \
src/os/unix/ngx_process.c \
src/os/unix/ngx_daemon.c \
src/os/unix/ngx_setaffinity.c \
src/os/unix/ngx_setproctitle.c \
src/os/unix/ngx_posix_init.c \
src/os/unix/ngx_user.c \
src/os/unix/ngx_process_cycle.c \
src/os/unix/ngx_linux_init.c \
src/event/modules/ngx_epoll_module.c \
src/os/unix/ngx_linux_sendfile_chain.c \
src/core/ngx_regex.c \
src/http/ngx_http.c \
src/http/ngx_http_core_module.c \
src/http/ngx_http_special_response.c \
src/http/ngx_http_request.c \
src/http/ngx_http_parse.c \
src/http/ngx_http_header_filter_module.c \
src/http/ngx_http_write_filter_module.c \
src/http/ngx_http_copy_filter_module.c \
src/http/modules/ngx_http_log_module.c \
src/http/ngx_http_request_body.c \
src/http/ngx_http_variables.c \
src/http/ngx_http_script.c \
src/http/ngx_http_upstream.c \
src/http/ngx_http_upstream_round_robin.c \
src/http/ngx_http_parse_time.c \
src/http/modules/ngx_http_static_module.c \
src/http/modules/ngx_http_index_module.c \
src/http/modules/ngx_http_chunked_filter_module.c \
src/http/modules/ngx_http_range_filter_module.c \
src/http/modules/ngx_http_headers_filter_module.c \
src/http/modules/ngx_http_not_modified_filter_module.c \
src/http/ngx_http_busy_lock.c \
src/http/ngx_http_file_cache.c \
src/http/modules/ngx_http_gzip_filter_module.c \
src/http/ngx_http_postpone_filter_module.c \
src/http/modules/ngx_http_ssi_filter_module.c \
src/http/modules/ngx_http_charset_filter_module.c \
src/http/modules/ngx_http_userid_filter_module.c \
src/http/modules/ngx_http_autoindex_module.c \
src/http/modules/ngx_http_auth_basic_module.c \
src/http/modules/ngx_http_access_module.c \
src/http/modules/ngx_http_limit_conn_module.c \
src/http/modules/ngx_http_limit_req_module.c \
src/http/modules/ngx_http_geo_module.c \
src/http/modules/ngx_http_map_module.c \
src/http/modules/ngx_http_split_clients_module.c \
src/http/modules/ngx_http_referer_module.c \
src/http/modules/ngx_http_rewrite_module.c \
src/http/modules/ngx_http_proxy_module.c \
src/http/modules/ngx_http_fastcgi_module.c \
src/http/modules/ngx_http_uwsgi_module.c \
src/http/modules/ngx_http_scgi_module.c \
src/http/modules/ngx_http_memcached_module.c \
src/http/modules/ngx_http_empty_gif_module.c \
src/http/modules/ngx_http_browser_module.c \
src/http/modules/ngx_http_upstream_ip_hash_module.c \
src/http/modules/ngx_http_upstream_least_conn_module.c \
src/http/modules/ngx_http_upstream_keepalive_module.c \
objs/ngx_modules.c
3.nginx的编译配置生成
由于nginx有很多的模块，在编译的过程中，nginx会根据系统环境的设置，生成ngx_modules.c、ngx_auto_config.h、ngx_auto_headers.h、Makefile等，然后，源代码中根据这些配置头文件，使用宏定义进行差异化编译。所以我们最重要的一步就是根据系统环境生成ngx_modules.c、ngx_auto_config.h、ngx_auto_headers.h、Makefile这几个文件。
步骤就是非常简单的，使用./configure就好了，以上文件都生成在nginx目录下的objs文件夹内。
生成QTCreator版本的nginx
打开QTCreator创建一个空的QTCreator项目,如下
现在把nginx文件夹下的src、objs文件夹拷贝到nginx目录下
修改.pro文件
TARGET = nginx
DESTDIR = ./objs
LIBS = -lpthread -lcrypt -lpcre -lcrypto -lcrypto -lz
INCLUDEPATH += \
src/core \
src/event \
src/event/modules \
src/os/unix \
src/http/modules \
src/http \
objs
HEADERS = src/core/nginx.h \
src/core/ngx_config.h \
src/core/ngx_core.h \
src/core/ngx_log.h \
src/core/ngx_palloc.h \
src/core/ngx_array.h \
src/core/ngx_list.h \
src/core/ngx_hash.h \
src/core/ngx_buf.h \
src/core/ngx_queue.h \
src/core/ngx_string.h \
src/core/ngx_parse.h \
src/core/ngx_inet.h \
src/core/ngx_file.h \
src/core/ngx_crc.h \
src/core/ngx_crc32.h \
src/core/ngx_murmurhash.h \
src/core/ngx_md5.h \
src/core/ngx_sha1.h \
src/core/ngx_rbtree.h \
src/core/ngx_radix_tree.h \
src/core/ngx_slab.h \
src/core/ngx_times.h \
src/core/ngx_shmtx.h \
src/core/ngx_connection.h \
src/core/ngx_cycle.h \
src/core/ngx_conf_file.h \
src/core/ngx_resolver.h \
src/core/ngx_open_file_cache.h \
src/core/ngx_crypt.h \
src/event/ngx_event.h \
src/event/ngx_event_timer.h \
src/event/ngx_event_posted.h \
src/event/ngx_event_busy_lock.h \
src/event/ngx_event_connect.h \
src/event/ngx_event_pipe.h \
src/os/unix/ngx_time.h \
src/os/unix/ngx_errno.h \
src/os/unix/ngx_alloc.h \
src/os/unix/ngx_files.h \
src/os/unix/ngx_channel.h \
src/os/unix/ngx_shmem.h \
src/os/unix/ngx_process.h \
src/os/unix/ngx_setaffinity.h \
src/os/unix/ngx_setproctitle.h \
src/os/unix/ngx_atomic.h \
src/os/unix/ngx_gcc_atomic_x86.h \
src/os/unix/ngx_thread.h \
src/os/unix/ngx_socket.h \
src/os/unix/ngx_os.h \
src/os/unix/ngx_user.h \
src/os/unix/ngx_process_cycle.h \
src/os/unix/ngx_linux_config.h \
src/os/unix/ngx_linux.h \
src/core/ngx_regex.h \
objs/ngx_auto_config.h \
src/http/ngx_http.h \
src/http/ngx_http_request.h \
src/http/ngx_http_config.h \
src/http/ngx_http_core_module.h \
src/http/ngx_http_cache.h \
src/http/ngx_http_variables.h \
src/http/ngx_http_script.h \
src/http/ngx_http_upstream.h \
src/http/ngx_http_upstream_round_robin.h \
src/http/ngx_http_busy_lock.h \
src/http/modules/ngx_http_ssi_filter_module.h
SOURCES = src/core/nginx.c \
src/core/ngx_log.c \
src/core/ngx_palloc.c \
src/core/ngx_array.c \
src/core/ngx_list.c \
src/core/ngx_hash.c \
src/core/ngx_buf.c \
src/core/ngx_queue.c \
src/core/ngx_output_chain.c \
src/core/ngx_string.c \
src/core/ngx_parse.c \
src/core/ngx_inet.c \
src/core/ngx_file.c \
src/core/ngx_crc32.c \
src/core/ngx_murmurhash.c \
src/core/ngx_md5.c \
src/core/ngx_rbtree.c \
src/core/ngx_radix_tree.c \
src/core/ngx_slab.c \
src/core/ngx_times.c \
src/core/ngx_shmtx.c \
src/core/ngx_connection.c \
src/core/ngx_cycle.c \
src/core/ngx_spinlock.c \
src/core/ngx_cpuinfo.c \
src/core/ngx_conf_file.c \
src/core/ngx_resolver.c \
src/core/ngx_open_file_cache.c \
src/core/ngx_crypt.c \
src/event/ngx_event.c \
src/event/ngx_event_timer.c \
src/event/ngx_event_posted.c \
src/event/ngx_event_busy_lock.c \
src/event/ngx_event_accept.c \
src/event/ngx_event_connect.c \
src/event/ngx_event_pipe.c \
src/os/unix/ngx_time.c \
src/os/unix/ngx_errno.c \
src/os/unix/ngx_alloc.c \
src/os/unix/ngx_files.c \
src/os/unix/ngx_socket.c \
src/os/unix/ngx_recv.c \
src/os/unix/ngx_readv_chain.c \
src/os/unix/ngx_udp_recv.c \
src/os/unix/ngx_send.c \
src/os/unix/ngx_writev_chain.c \
src/os/unix/ngx_channel.c \
src/os/unix/ngx_shmem.c \
src/os/unix/ngx_process.c \
src/os/unix/ngx_daemon.c \
src/os/unix/ngx_setaffinity.c \
src/os/unix/ngx_setproctitle.c \
src/os/unix/ngx_posix_init.c \
src/os/unix/ngx_user.c \
src/os/unix/ngx_process_cycle.c \
src/os/unix/ngx_linux_init.c \
src/event/modules/ngx_epoll_module.c \
src/os/unix/ngx_linux_sendfile_chain.c \
src/core/ngx_regex.c \
src/http/ngx_http.c \
src/http/ngx_http_core_module.c \
src/http/ngx_http_special_response.c \
src/http/ngx_http_request.c \
src/http/ngx_http_parse.c \
src/http/ngx_http_header_filter_module.c \
src/http/ngx_http_write_filter_module.c \
src/http/ngx_http_copy_filter_module.c \
src/http/modules/ngx_http_log_module.c \
src/http/ngx_http_request_body.c \
src/http/ngx_http_variables.c \
src/http/ngx_http_script.c \
src/http/ngx_http_upstream.c \
src/http/ngx_http_upstream_round_robin.c \
src/http/ngx_http_parse_time.c \
src/http/modules/ngx_http_static_module.c \
src/http/modules/ngx_http_index_module.c \
src/http/modules/ngx_http_chunked_filter_module.c \
src/http/modules/ngx_http_range_filter_module.c \
src/http/modules/ngx_http_headers_filter_module.c \
src/http/modules/ngx_http_not_modified_filter_module.c \
src/http/ngx_http_busy_lock.c \
src/http/ngx_http_file_cache.c \
src/http/modules/ngx_http_gzip_filter_module.c \
src/http/ngx_http_postpone_filter_module.c \
src/http/modules/ngx_http_ssi_filter_module.c \
src/http/modules/ngx_http_charset_filter_module.c \
src/http/modules/ngx_http_userid_filter_module.c \
src/http/modules/ngx_http_autoindex_module.c \
src/http/modules/ngx_http_auth_basic_module.c \
src/http/modules/ngx_http_access_module.c \
src/http/modules/ngx_http_limit_conn_module.c \
src/http/modules/ngx_http_limit_req_module.c \
src/http/modules/ngx_http_geo_module.c \
src/http/modules/ngx_http_map_module.c \
src/http/modules/ngx_http_split_clients_module.c \
src/http/modules/ngx_http_referer_module.c \
src/http/modules/ngx_http_rewrite_module.c \
src/http/modules/ngx_http_proxy_module.c \
src/http/modules/ngx_http_fastcgi_module.c \
src/http/modules/ngx_http_uwsgi_module.c \
src/http/modules/ngx_http_scgi_module.c \
src/http/modules/ngx_http_memcached_module.c \
src/http/modules/ngx_http_empty_gif_module.c \
src/http/modules/ngx_http_browser_module.c \
src/http/modules/ngx_http_upstream_ip_hash_module.c \
src/http/modules/ngx_http_upstream_least_conn_module.c \
src/http/modules/ngx_http_upstream_keepalive_module.c \
objs/ngx_modules.c
现在来解释一下为什么这么用
主要解释一下INCLUDEPATH、LIBS，因为我在这上面吃过亏
- INCLUDEPATH:之所以有使用这个配置项，是因为在nginx源码中，所有的头文件都是#include
，所以我们需要把他所有的头文件都当做库的头文件，所以我们把这个源文件的头文件加入INCLUDEPATH, INCLUDEPATH += \ src/core \ src/event \ src/event/modules \ src/os/unix \ src/http/modules \ src/http \ objs - LIBS:这个配置项是因为nginx依赖了一些库比如说pthread md5什么来的，故需要使用这个加上
LIBS = -lpthread -lcrypt -lpcre -lcrypto -lcrypto -lz
好了，现在就可以编译了