Autoconf附加到输出变量和程序特定的LIBS [英] Autoconf Append to Output Variable and Program Specific LIBS

问题描述

在configure.ac中使用autoconf，我需要附加到输出变量.

Using autoconf in configure.ac I need to append to an output variable.

具体来说，我想为每个程序(Makefile.am中的myprogram1和myprogram2)以不同的方式附加到LIBS变量.假设myprogram1需要一个-lboost_python，而myprogram2需要-losg.

Specifically I want to append to the LIBS variable differently for each of my programs (myprogram1 and myprogram2 in the Makefile.am). Lets imagine myprogram1 requires a -lboost_python and myprogram2 requires -losg.

本质上，某些程序需要某些lib，而其他程序则不需要.这是我正在做的事的一个例子.当然，AC_SUBST根据我的理解进行分配(= vs + =)，所以这是行不通的.

Essentially some programs require certain libs while others do not. Here is an example of what I am doing. Of course AC_SUBST does an assignment (= vs +=) from what I understand so that doesn't work.

AC_CHECK_LIB([boost_python], [main], [AC_SUBST([myprogram1_LIBS], ["-lboost_python"])                      
  AC_DEFINE([HAVE_LIBBOOST_PYTHON], [1], [Define if you have libboost_python])],                  
  [AC_MSG_FAILURE([boost_python library not found])])  
AC_CHECK_LIB([osg], [main], [AC_SUBST([myprogram2_LIBS], ["-losg"])                      
  AC_DEFINE([HAVE_LIBOSG], [1], [Define if you have libosg])],                  
  [AC_MSG_FAILURE([osg library not found])])  

我需要使用第一个库构建myprogram1_SOURCES并使用第二个库构建myprogram2_SOURCES.

What I need is for the myprogram1_SOURCES to be built with the first lib and the myprogram2_SOURCES to be built with the second lib.

我可以使用AC_APPEND_SUBST类型的宏吗?和/或是否有更好的方法让我做需要做的事情，以构建具有链接的不同库的不同程序?

Is there an AC_APPEND_SUBST type macro I can use? And/or is there a better way for me to do what I need to do to build different programs with different libraries being linked?

推荐答案

我假设您的AC_CHECK_LIB调用是正确的(如果不正确，您是否尝试过使用 autoconf存档(特别是

I assume that your AC_CHECK_LIB calls and such do the right thing (if they don't, have you tried using the macros from the autoconf archive (specifically AX_BOOST_PYTHON))? I can't believe that both boost python and osg provide main.

无论如何，要回答所问的问题，您不必一次全部提供AC_SUBST'd变量的内容，因此您可以执行以下操作:

Anyway, to answer the question as asked, you don't have to provide the contents of an AC_SUBST'd variable all at once, so you can do stuff like this:

myprogram1_LIBS=""
AX_BOOST_PYTHON
myprogram1_LIBS="$myprogram1_LIBS $BOOST_PYTHON_LIB"
# ...
AC_SUBST([myprogram1_LIBS])

P.S.将库添加到程序的变量是 LDADD或myprogram1_LDADD .

P.S. the variable to add libraries to a program is LDADD or myprogram1_LDADD.

这篇关于Autoconf附加到输出变量和程序特定的LIBS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！