5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
__PROMPT = $(shell read -p "$(__HISTORY)> " CMD ARG ; echo $$CMD $$ARG)
__DEBUG = $(eval __c = $(strip $1)) \
$(eval __a = $(strip $2)) \
$(if $(call seq,$(__c),c), \
$(true), \
$(if $(call seq,$(__c),q), \
$(error Debugger terminated build), \
$(if $(call seq,$(__c),v), \
$(warning $(__a) has value '$($(__a))'), \
$(if $(call seq,$(__c),d), \
$(warning $(__a) is defined as '$(value $(__a))'), \
$(if $(call seq,$(__c),o), \
$(warning $(__a) came from $(origin $(__a))), \
$(if $(call seq,$(__c),h), \
$(warning c continue) \
$(warning q quit) \
$(warning v VAR print value of $$(VAR)) \
$(warning o VAR print origin of $$(VAR)) \
$(warning d VAR print definition of $$(VAR)), \
$(warning Unknown command '$(__c)')))))))
__BREAK = $(eval __INPUT := $(__PROMPT)) \
$(call __DEBUG, \
$(word 1,$(__INPUT)), \
$(word 2,$(__INPUT)))
__BANNER = $(warning GNU Make Debugger Break) \
$(if $^, \
$(warning - Building '$@' from '$^'), \
$(warning - Building '$@')) \
$(if $<,$(warning - First prerequisite is '$<')) \
$(if $%,$(warning - Archive target is '$%')) \
$(if $?,$(warning - Prequisites '$?' are newer than '$@'))
__BREAKPOINT = $(__BANNER) \
$(eval __TERMINATE := $(false)) \
$(foreach __HISTORY, \
$(__LOOP), \
$(if $(__TERMINATE),, \
$(eval __TERMINATE := $(__BREAK))))
Pages
About the author
John Graham-Cumming is Co-Founder at Electric Cloud, Inc . Prior to joining Electric Cloud, John was a Venture Consultant with Accel Partners, VP of Internet Technology at Interwoven, Inc. (IWOV), VP of Engineering at Scriptics Corporation (acquired by Interwoven), and Chief Architect at Optimal Networks, Inc. John holds BA and MA degrees in Mathematics and Computation and a Doctorate in Computer Security from Oxford University. John is the creator of the highly acclaimed open source POPFile project. He also holds two patents in network analysis and has others pending.
