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4.2 Instances of different types

Instances of different types are not built in parallel; they are built in the order in which the gnustep-make make fragments (tool.make, library.make, etc) are included.

This behaviour is backwards-compatible with previous releases of gnustep-make and it's important to know about it (later on we'll explain how you do a parallel build in this case by moving the instances into different subdirectories and using the new parallel-subdirectories.make makefile).

For example, if your GNUmakefile builds a library and a tool, they will be always be built separately and in serial order. If you include tool.make before library.make, the tool will be built first; if you include library.make first, the library will be built first.

Let's look at a quick example -

include $(GNUSTEP_MAKEFILES)/common.make

LIBRARY_NAME = HelloMoon
HelloMoon_OBJC_FILES = HelloMoon.m HelloMars.m

TOOL_NAME = HelloWorld
HelloWorld_OBJC_FILES = HelloWorld.m main1.m

include $(GNUSTEP_MAKEFILES)/library.make
include $(GNUSTEP_MAKEFILES)/tool.make

In this case, the HelloMoon library will be built before the HelloWorld tool because library.make is included before tool.make.

So, the building in this case will work as follows:

Step 0. Execute before-all:: if it exists
Step 1. Build HelloMoon
Step 2. Build HelloWorld
Step 3. Execute after-all:: if it exists