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| author | Simon Marlow <marlowsd@gmail.com> | 2010-09-21 13:47:29 +0000 |
|---|---|---|
| committer | Simon Marlow <marlowsd@gmail.com> | 2010-09-21 13:47:29 +0000 |
| commit | 75d9236613acdcfa54deb81b12bd4546c31e7c9f (patch) | |
| tree | aba9667bbdc8518d431ee79a6190069f736a61b0 /rules/trace.mk | |
| parent | 6a1dd52566ae92ce133e751d9a800a8631b05b73 (diff) | |
| download | haskell-75d9236613acdcfa54deb81b12bd4546c31e7c9f.tar.gz | |
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.
Diffstat (limited to 'rules/trace.mk')
| -rw-r--r-- | rules/trace.mk | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/rules/trace.mk b/rules/trace.mk new file mode 100644 index 0000000000..356f121d23 --- /dev/null +++ b/rules/trace.mk @@ -0,0 +1,21 @@ +# ----------------------------------------------------------------------------- +# +# (c) 2010 The University of Glasgow +# +# This file is part of the GHC build system. +# +# To understand how the build system works and how to modify it, see +# http://hackage.haskell.org/trac/ghc/wiki/Building/Architecture +# http://hackage.haskell.org/trac/ghc/wiki/Building/Modifying +# +# ----------------------------------------------------------------------------- + +# A helpful little debug macro. Call it from a macro like this: +# +# $(call trace, this-macro($1,$2,$3)) +# +# And invoke the build system with TRACE=1 to turn on tracing. + +define trace +$$(if $(TRACE),$$(warning $1),) +endef |