I need to generate a directory in my makefile and I would like to not get the "directory already exists error" over and over even though I can easily ignore it.
I mainly use mingw/msys but would like something that works across other shells/systems too.
I tried this but it didn't work, any ideas?
ifeq (,$(findstring $(OBJDIR),$(wildcard $(OBJDIR) )))
-mkdir $(OBJDIR)
endif
On UNIX Just use this:
mkdir -p $(OBJDIR)
The -p option to mkdir prevents the error message if the directory exists.
If having the directory already exist is not a problem for you, you could just redirect stderr for that command, getting rid of the error message:
-mkdir $(OBJDIR) 2>/dev/null
Inside your makefile:
target:
if test -d dir; then echo "hello world!"; else mkdir dir; fi
$(OBJDIR):
mkdir $@
Which also works for multiple directories, e.g..
OBJDIRS := $(sort $(dir $(OBJECTS)))
$(OBJDIRS):
mkdir $@
Adding $(OBJDIR) as the first target works well.
It works under mingw32/msys/cygwin/linux
ifeq "$(wildcard .dep)" ""
-include $(shell mkdir .dep) $(wildcard .dep/*)
endif