Hej!
I am trying to find ways to make Makefiles more foolproof and need ideas,
advices, and reference to already established methods. (For background see
http://www.perlmonks.org/?node_id=954865.)
I want to find portable ways in a Makefile to:
1] Find which make program is used
2] Give a warning message
3] Give an error message and stop the make program
4] (If there is a solution to 1] ) Find methods to create more portable
Makefiles
Portable means here that the Makefile can be used by many make programs.
If possible a message should be given if the Makefile is incompatible with the
used make program.
Find which make program is used
-------------------------------
I have so far found a way to distinguish between (gnu)make and dmake:
ifeq "{xxx}" "xxx"
MAKE_USED = dmake
else
MAKE_USED = make
endif
(In dmake "{xxx}" and "xxx" is equal.)
Where can I find examples of such methods?
Are there methods to identify more make programs?
Give a warning message
----------------------
In gnumake
$(warning ERROR: Using $(MAKE_USED) for a Makefile intended for $(MAKE))
can be used. Have not found any good way in dmake.
Are there any portable way to give warning message?
Give an error message and stop the make program
-----------------------------------------------
In gnumake
$(error ERROR: Using $(MAKE_USED) for a Makefile intended for $(MAKE))
can be used. Have not found any good way in dmake.
Are there any portable way to give a message and stop the make program?
Find methods to create more portable Makefiles
----------------------------------------------
This illustrates one idea.
This is included in the beginning of the Makefile:
PS_AT_ARGV_PS = {@ARGV}
ifeq "MAKE_USED" "dmake"
PS_AT_ARGV_PS = {{@ARGV}}
endif
{@ARGV} can then in the rest of the Makefile be replaced by $(PS_AT_ARGV_PS)
One example is in:
$(NOECHO) $(ABSPERLRUN) -MExtUtils::Install -e "pm_to_blib($(PS_AT_ARGV_PS),
'$(INST_LIB)\auto', q[$(PM_FILTER)], '$(PERM_DIR)')" -- \ ...
Hopefully this will make the Makefile more portable.
Any hit to make more foolproof Makefiles is appreciated!
Best regards
Bo Johansson
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