makepp_statements Perl package contains various statements in a makefile.
and, build_cache, "build_check", define, else, enddef, endef, endif, "export", global, ifdef, "ifeq", "ifmakeperl", ifndef, ifneq, ifnsys, "ifperl", "ifsys", "include", "_include", load_makefile, make, perl, "makesub", no_implicit_load, or, perl, "perl_begin", perl_end, "prebuild", register_scanner, "register_command_parser", "register_input_suffix", repository, "runtime", signature, "sub"
A statement is any line beginning with a word which does not have a : in it. (A colon implies that the line is a rule.) For example, these are statements:
include extra_rules.mk
load_makefile subdir
Makepp has a number of builtin statements which you may occasionally need to use.
Note that wherever you see an underscore, you may also use a dash, because makepp converts dashes to underscores in statement names.
Conditionals
Conditionals are special statements, which control what lines of the Makeppfile are actually seen. The simplest form (where ifxxx stands for any of the conditional statements documented below) is:
ifxxx ...
lines seen if the statement evaluates as true
endif
or:
ifxxx ...
lines seen if the statement evaluates as true
else
lines seen if the statement evaluates as false
endif
There is also the possibility to do complex combinations like this:
ifxxx ...
and ifxxx ...
and ifxxx ...
or ifxxx ...
and ifxxx ...
lines seen if the combined statements evaluate as true
else ifxxx ...
or ifxxx ...
and ifxxx ...
lines seen if the first combination evaluates as false
and these combined statements evaluate as true
else
lines seen if the statements above evaluate as false
endif
As is suggested by the indentation, and has higher precedence than or. In other words an or elects between two groups of and`s. There may be any number of and ifxxx`s, or ifxxx`s and else ifxxx`s.
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