如何在Makefile.am中包含mysql.h和my_global.h? [英] How do I include mysql.h and my_global.h into the Makefile.am?

问题描述

我正在尝试创建一个可以通过以下两个头文件与MySQL数据库通信的C程序:

I'm trying to create a C program that can communicate with MySQL database via these two header files:

mysql.h 
my_global.h

MySQL带有mysql_config脚本，您可以执行该脚本来查找包含文件和库文件在系统中的位置.我想知道如何在Makefile.am中定义它?

MySQL comes with mysql_config script that you can execute to find out where the include files and library files reside in the system. I was wondering how would you define it in the Makefile.am?

我目前有以下内容:

bin_PROGRAMS = db    
db_SOURCES = db.c db.h                                            
db_CFLAGS = -Wall `mysql_config --cflags --libs`  

这是正确的方法吗?

推荐答案

我会使用configure.ac中搜索mysql_config/ax_with_prog.html"rel =" nofollow> AX_WITH_PROG 宏:

I would search for mysql_config in configure.ac using the AX_WITH_PROG macro:

AX_WITH_PROG([MYSQL_CONFIG], [mysql_config], [AC_MSG_ERROR(mysql_config is required to build)])

，因此，如果将MYSQL_CONFIG环境变量安装在程序中的意外位置，则用户可以将其指向该程序.而且，如果用户尚未安装，则他们会收到一条不错的错误消息，警告他们在尝试构建之前 .

so your users will be able to point the MYSQL_CONFIG environment variable at the program should it be installed in an unexpected location. And if the users haven't installed it, they will get a nice error message which alerts them to that fact before attempting to build.

我可能还会在configure.ac中设置cflags，cppflags和lib，因为在运行configure之后它们不应更改:

I'd probably set up the cflags, cppflags, and libs in configure.ac as well, since they shouldn't change after configure is run:

MYSQL_CONFIG_CFLAGS=`$MYSQL_CONFIG --cflags`
MYSQL_CONFIG_CPPFLAGS=`$MYSQL_CONFIG --include`
MYSQL_CONFIG_LIBS=`$MYSQL_CONFIG --libs`
AC_SUBST([MYSQL_CONFIG_CFLAGS])
AC_SUBST([MYSQL_CONFIG_CPPFLAGS])
AC_SUBST([MYSQL_CONFIG_LIBS])

并将它们放置在Makefile.am

db_CFLAGS = -Wall $(MYSQL_CONFIG_CFLAGS)
db_CPPFLAGS=$(MYSQL_CONFIG_CPPFLAGS)
db_LDADD=$(MYSQL_CONFIG_LIBS)

如果仅需要头文件，则可能不需要设置cflags变量.

If all you need is the header files, you probably won't need to set up the cflags variable.

这篇关于如何在Makefile.am中包含mysql.h和my_global.h?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！