----- Original Message -----
From: "Eli Zaretskii" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Thursday, May 03, 2001 1:15 PM
Subject: Re: GNU Make enhansment patch - batching compiles
>
> I thought about doing that from the rule which is normally used to
> compile .java into .class. Something like this:
>
> %.class : %.java
> echo '$< \\' >> files_list
>
Using an implicit rule is not really what I want to do,
esplically in java where there is not a 1 to 1 relationship
between .class and .java files. Several class files can
be produced from a single java file. Also the generated
.class files may have no relationship to the .java files.
I have a system which already builds these sorts of make files
here is an example:
.PHONY : BATCH1
.PHONY : all_classes
all: all_classes
build_classes = 1.class 2.class 3.class
#### Decide if we should batch the build if someone did "make all"
#### We have to be able to do a non batch build incase someone
#### wants to build a class file such as "make 1.class"
ifeq (${MAKECMDGOALS},all)
batch := 1
all_classes: $(build_classes) BATCH1
else
all_classes: $(build_classes)
endif
#### Here is a compile rule
compile_cmd = javac
#### Other dependancies
1.class: worker.java thinker.java
2.class: worker.java
#### Rules to build class files
#### For each rule there is a batch collector if we
#### are supposed to batch build files
1.class: big.java
ifeq (${batch},1)
$(globalvar targlist1,${targlist1} $<)
else
$(compile_cmd) $<
endif
2.class: big.java
ifeq (${batch},1)
$(globalvar targlist1,${targlist1} $<)
else
$(compile_cmd) $<
endif
3.class: 3.java
ifeq (${batch},1)
$(globalvar targlist1,${targlist1} $<)
else
$(compile_cmd) $<
endif
BATCH1:
@if [ "${targlist1}" = "" ] ; then\
"Targets up to date.";\
else\
echo ***building***: Batched $(sort ${targlist1});\
echo $(compile_cmd) $(sort ${targlist1}); \
fi
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