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Add makefile debugging rule for printing out the value of a variable. 

From http://blog.melski.net/tag/debugging-makefiles/.

Example:

[13:14:59] johnny:/Volumes/data/lldb/svn/trunk/test/class_static $ make print-CC
CC=gcc
  origin = file
  flavor = recursive
   value = gcc
[13:15:09] johnny:/Volumes/data/lldb/svn/trunk/test/class_static $ make print-LD
LD=  g++
  origin = file
  flavor = recursive
   value = $(call cxx_linker,$(CC))
[13:15:21] johnny:/Volumes/data/lldb/svn/trunk/test/class_static $ make print-CXX
CXX=  g++
  origin = file
  flavor = recursive
   value = $(call cxx_compiler,$(CC))
[13:15:29] johnny:/Volumes/data/lldb/svn/trunk/test/class_static $

llvm-svn: 123469
This commit is contained in:
Johnny Chen 2011-01-14 21:18:12 +00:00
parent 9ccce77893
commit fa38041dac
1 changed files with 11 additions and 0 deletions
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11
lldb/test/make/Makefile.rules
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@ -175,3 +175,14 @@ ifeq "$(DYLIB_NAME)" ""
else
rm -rf "$(EXE)" "$(DSYM)" $(OBJECTS) $(PREREQS) $(DYLIB_OBJECTS) $(DYLIB_NAME) $(DYLIB_NAME).dSYM
endif
#----------------------------------------------------------------------
# From http://blog.melski.net/tag/debugging-makefiles/
#
# Usage: make print-CC print-CXX print-LD
#----------------------------------------------------------------------
print-%:
@echo '$*=$($*)'
@echo ' origin = $(origin $*)'
@echo ' flavor = $(flavor $*)'
@echo ' value = $(value $*)'