OMAKE Guide, Release 2002.05.00, Windows

2.10 Directives

Makefile directives control the makefile lines omake reads at read time. The following makefile uses conditional directives (%if, %elif, %else, and %endif) to support both Borland and Microsoft compilers. Comments have been added for documentation.

`# This makefile compiles for the configuration specified # in the CFG macro.`

`CFG`	`= Release`
`OBJS`	`= main.obj io.obj`

`# Configuration-dependent section`
`%if $(CFG)`	`== Release`
`CFLAGS`	`= /O1`
`LINK_FLAGS`	`=`
`%elif $(CFG)`	`== Debug`
`CFLAGS`	`= /Od /Zi`
`LINK_FLAGS`	`= /debug`
`%else`
`%abort Unsupported configuration $(CFG)`
`%endif`

`project.exe: $(OBJS)`
`link /out:$(.TARGET) $(LINK_FLAGS) $(OBJS)`

`%.obj: %.c`
`cl $(CFLAGS) /c $(.SOURCE)`

The layout of this makefile is fairly traditional; macros are defined first, and the primary target follows the macros.

This example also uses the %abort directive to abort omake if the makefile does not support a particular compiler. Directives can also be used at run time, to control the build scripts omake executes. For more information, see Makefile Directives.