here related rules variable:
libad = libadard.a install: $(crslib)/$(libad) $(crslib)/$(libad): $(libad) $(libad): $(objects1) objects1 = $(libad)(libadardv.o)\ $(libad)(a_delbb.o) $(libad)(a_getbkm.o)\ ... $(libad)(a_getbkm.o): a_getbkm.p \ $(kincdir)/dbug.h \ $(priminc)/systypes.h \ $(priminc)/externs.h \ $(priminc)/reserrs.h \ $(kincdir)/ltypes.h \ $(kincdir)/except.h \ $(priminc)/u_pr_bkmsg.h \ $(crsinc)/sqlerrs.h \ $(pdbinc)/systypes.th \ $(priminc)/u_pr_bkmsg.th \ $(informinc)/sqlca.h if run "make install", here's got:
make: *** no rule make target `/sqlca.h', needed `libadard.a(a_getbkm.o)'. stop. for testing purpose, added rule in makefile check value of variable $(informinc):
phony: all: ; @echo $(informinc) and output correct:
mtang@rv02 release>make /informix-rv02_1/incl/esql i checked under directory "/informix-rv02_1/incl/esql", file sqlca.h there. went wrong?
update:
variable $(informinc) not defined in makefile. defined in makerules file sitting @ root level, , makerules included makefile:
include ../../makerules update 2:
problem solved. @roland illig clue. in makerules, informinc defined as:
informixdir := $(my_informixdir) informix := $(informixdir) informinc := $(informix)/incl/esql i copied last line informinc defined , paste in makefile. , worked. not sure if totally understand reason behind this, gives me experience deal similar problems in future.
in bsd make (and think in many other implementations, too), dependency lines evaluated eagerly, @ time of parsing. when define informinc variable @ later point, not influence dependency rule.
the shell command in all target evaluated lazily, before executing it. therefore see value.
see https://mail-index.netbsd.org/tech-pkg/2016/05/26/msg016900.html, explained topic litle more verbosely.
