How can I tell gnu make not to build some recipe in parallel. Let's say I have the following makefile :

sources = a.xxx b.xxx c.xxx
target  = program

all : $(target)

$(target) : $(patsubst %.xxx,%.o,$(sources))
    $(CXX) -o $@ $<

%.o : %.cpp
    $(CXX) -c -o $@ $<

%.cpp : %.xxx
    my-pre-processor -o $@ $<

However, the my-pre-processor command create temporary files with fixed name (I cannot change this). This is working fine if I just use make without the -j parameter. However, if the -j option is used, the build sometimes fails because two concurrent invocation of my-pre-processor overwrite their temporary files.

I'd like to know if there is a way to tell make that it must not build the try to parallelize the execution of the %.cpp : %.xxx recipes.

makefile parallel-processing gnu-make
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