makefile ifeq empty string
For example: ifeq ($(strip $(foo)),) text-if-empty endif. will evaluate text-if-empty even if the expansion of $(foo) contains whitespace characters. ifneq ( arg1 , arg2 ) ... , I also want it to run regardless of subdomain, so I use the make wildcard function. ifeq ($(wildcard *.remote.server.com),$(HOSTNAME)) echo "ON ..., unless you actually intend that the variable should contain the string ' ""'. (You could have discovered those last to yourself, playing with ifeq in ..., Note that, due to the time of evaluation, make conditionals ( ifeq , ifneq ...) cannot be used in recipes the way you tried. Use shell conditionals ..., ifeq (,$(subst ",,$(ABC)$(XYZ))) $(error empty string or null) endif. which will replace all quotes with nothing; if the result of that is an empty ..., Makefile set if variable is empty. Many make programs have conditions, and also functions to test variables. Depending on what something is, you could use ifeq(,$(TEST)) or if something is a shell command perhaps something || something else . – This may
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 makefile ifeq empty string 相關參考資料
Conditional Syntax (GNU make) - GNU.org
For example: ifeq ($(strip $(foo)),) text-if-empty endif. will evaluate text-if-empty even if the expansion of $(foo) contains whitespace characters. ifneq ( arg1 , arg2 ) ... https://www.gnu.org Makefile wildcard function evaluates to true against empty string
I also want it to run regardless of subdomain, so I use the make wildcard function. ifeq ($(wildcard *.remote.server.com),$(HOSTNAME)) echo "ON ... https://stackoverflow.com makefile: fail on single make target if variable empty - Stack ...
unless you actually intend that the variable should contain the string ' ""'. (You could have discovered those last to yourself, playing with ifeq in ... https://stackoverflow.com Makefile test if variable is not empty - Stack Overflow
Note that, due to the time of evaluation, make conditionals ( ifeq , ifneq ...) cannot be used in recipes the way you tried. Use shell conditionals ... https://stackoverflow.com Null check and empty string check in makefile - Stack Overflow
ifeq (,$(subst ",,$(ABC)$(XYZ))) $(error empty string or null) endif. which will replace all quotes with nothing; if the result of that is an empty ... https://stackoverflow.com Makefile set if variable is empty - Stack Overflow
Makefile set if variable is empty. Many make programs have conditions, and also functions to test variables. Depending on what something is, you could use ifeq(,$(TEST)) or if something is a shell co... https://stackoverflow.com |