make Environment

The make environment is defined by a file containing variable definitions and rules. Rules for compiling C, C++, and assembly language are provided. The rules are specific to the compiler you use, and the name of the file indicates the compiler. For example, if you are using the gcc compiler, the make environment file is called tgt-make/gcc-devsys.mk. The file contains the variables and rules required for building the component. The following variables are defined:

• CFLAGS and CXXFLAGS specify the compilation options for C and C++ files, respectively. The compilation options are shown in Table 4-1.

  Table 4-1 Compilation Options

  Option	Possible Settings	Default Setting
  WARN	WARN_ON, WARN_OFF	WARN_ON
  DEBUG	DEBUG_ON, DEBUG_OFF	DEBUG_OFF
  PROF	PROF_ON, PROF_OFF	PROF_OFF
  OPT	OPT_ON, OPT_OFF	OPT_ON

• INCLUDES and DEPENDS specify include and depend values. These variables can be overloaded at the application level. They are grouped into the CPPFLAGS flag, which is used in compilation and to compute dependencies. Both INCLUDES and DEPENDS can be initialized at the application level.

• LD_UCRT0, LD_SCRT0, LD_LCRT0, LD_CRTI, LD_CRTN, and LD_CRTXT are used to manage different types of crt object files.

• LD_U_ACTOR and LD_S_ACTOR specify link information for user and supervisor actors.

• CLX_U_LIBS, CLX_S_LIBS, EBD_U_LIBS, EBD_S_LIBS, and CXX_LIBS are provided to manage libraries.

The make environment includes the following commands: cc, ld, as, and mkactors.