b2 build group libs - Posted on Jun 21, 2024 - See https://www.bfgroup.xyz/b2 - Logs Home - d0025

b2 build, how to group many libaries as a bunch

Purpose:

I have many library targets, I don't want to link them by writting their names one by one, I want to make one name to all of them.

For example, I want to merge lib1, lib2, and lib3, and lib4 into one name target.

How to define library target in b2 build jamfile

Build library target

lib the_lib_name : src1.cpp src2.cpp : <cxxstd>23 ;

This will build a library libthe_lib_name.so with src1.cpp and src2.cpp, and the library target name is the_lib_name .

Prebuilt library target

lib the_lib_name : : <name>the_name <search>/usr/local/lib : : <include>/usr/local/include ;

This will define a library target the_lib_name .

Because the source code list is empty, it will use prebuilt library .

<name>the_name , this means it will search name libthe_name.so

<search>/usr/local/lib, this means it will search path /usr/local/lib to find that libthe_name.so

<include>/usr/local/include, this means any other targets that depend this target will add -I/usr/local/include as their include path.

Many b2 jamfile rules follow parameter format like this:

rule_name param1 : param2 : param3 : param4 : param5 : param6 : ... : ... : ... ;

For example, the rule lib :

lib lib_name : source_code_list : requirements : default-build : usage-requirements ;

If the library search path is standard, ...

If the library search path is standard, the <search> can be empty.

lib lib3 : : <name>lib3 ;	# Omit the <search>

Because the search path of libs is standard, the <search> can be omitted.

More short ...

lib lib3 ;

This is the same as :

lib lib3 : : <name>lib3 ;

But if you want to use different target name and library name, you can not use that short code.

lib audio : : <name>lib3 ;	# target name is audio, library name is lib3, aka. liblib3.so

To define many targets, nice:

lib lib3 lib2 lib1 ;

It is the same as:

lib lib3 : : <name>lib3 ;
lib lib2 : : <name>lib2 ;
lib lib1 : : <name>lib1 ;

alias to many targets

alias target : target1 target2 target3 ;

So, I have my first solution:

lib lib1 lib2 lib3 lib4 ;
alias liball : lib1 lib2 lib3 lib4 ;

exe my_prog : my_prog.cpp : <library>liball <cxxstd>23 ;

Cheers, cpp/c++ !

const std::string greeting = "Cheers, c++!";

std::cout << greeting << std::endl;

std::cout << greeting.data() << std::endl;

caught:

  ===================================
  #  The c++ programming language.  #
  #                                 #
  #  Join c++                       #
  #  Deck                           #
  ===================================

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