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Revision 75d9236613acdcfa54deb81b12bd4546c31e7c9f, 0.7 KB
(checked in by Simon Marlow <marlowsd@…>, 21 months ago)
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add a simple trace facility to the build system
saying
make TRACE=1
prints most of the macro calls and their arguments. It's easy to
trace new macros; see rules/trace.mk.
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Property mode set to
100644
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| 1 | # ----------------------------------------------------------------------------- |
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| 2 | # |
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| 3 | # (c) 2010 The University of Glasgow |
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| 4 | # |
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| 5 | # This file is part of the GHC build system. |
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| 6 | # |
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| 7 | # To understand how the build system works and how to modify it, see |
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| 8 | # http://hackage.haskell.org/trac/ghc/wiki/Building/Architecture |
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| 9 | # http://hackage.haskell.org/trac/ghc/wiki/Building/Modifying |
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| 10 | # |
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| 11 | # ----------------------------------------------------------------------------- |
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| 12 | |
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| 13 | # A helpful little debug macro. Call it from a macro like this: |
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| 14 | # |
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| 15 | # $(call trace, this-macro($1,$2,$3)) |
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| 16 | # |
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| 17 | # And invoke the build system with TRACE=1 to turn on tracing. |
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| 18 | |
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| 19 | define trace |
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| 20 | $$(if $(TRACE),$$(warning $1),) |
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| 21 | endef |
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