makefile ifeq empty string
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(,$(TEST)) or if something is a shell command perhaps something || something else . – This may , Note that, due to the time of evaluation, make conditionals ( ifeq , ifneq ...) cannot be used in recipes the way you tried. Use shell conditionals ...
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makefile ifeq empty string 相關參考資料
Conditional Syntax (GNU make) - GNU.org
For example: ifeq ($(strip $(foo)),) text-if-empty endif. will evaluate text-if-empty even if the expansion of $(foo) contains whitespace characters. ifneq ( arg1 , arg2 ) ... https://www.gnu.org Makefile set if variable is empty - Stack Overflow
Makefile set if variable is empty. Many make programs have conditions, and also functions to test variables. Depending on what something is, you could use ifeq(,$(TEST)) or if something is a shell co... https://stackoverflow.com 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 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 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 |