Cross platform Makefile

I needed to change my Makefile to output different target information based on the Operating System. This turned out more difficult than I thought since Windows doesn't have uname. I asked some friends, and the gave me some code snippets. To start with find the OSCLASS and OSNAME.

ifeq ($(OS),Windows_NT)
    OSCLASS = windows
    OSNAME=windows
else
    OSCLASS = unix
    UNAME_S := $(shell uname -s)
    ifeq ($(UNAME_S),Linux)
     OSNAME = linux
    endif
    ifeq ($(UNAME_S),Darwin)
        OSNAME = osx
    endif
endif

You can then do switches based upon the compiling OS. The biggest one was that I needed to output to a file. The problem with files that would write to both windows and unix is that the shell commands are different, so I need to address the differences in commands.

ifeq ($(OSCLASS),unix)
    FIXDIR = $1
    COMMANDCAT = cat
else
    FIXDIR = $(subst /,\,$1)
    COMMANDCAT = type
endif

Windows uses "type", whereas unix uses "cat". I then also fix the \ issue to go from the the unix / to the windows \ with the FIXDIR command. When I type "make test", the following will output the contents of info/chunk2.txt and append it to installer/test.inf.

test:
  $(COMMANDCAT) $(call FIXDIR,info/chunk2.txt >> installer/test.inf)

In unix, you will get: cat info/chunk2.txt >> installer/test.inf
In Windows, you get: type info\chunk2.txt >> installer\test.inf

Moore's Law is Dead? True!

Moore's Law is Dead. Laws of marketing never hold up well.

Referencing datasheets in BIBTEX.

The CD4007 inverter pair is referenced as far back as papers from the early 1970's.  It's a great IC for teaching, but I really had to think of how to reference it using bibtex. I decided to go with the MISC tag.

@misc{CD4007,
    author={Texas Instruments},
    title={CD4007UB},
    url={http://www.ti.com/lit/ds/symlink/cd4007ub.pdf},
    note={original document from Harris Semiconductor},
    publisher={Texas Instruments},
    year={2012}
}

UPDATE:
Of course, once I decide on a method, I come up with a better method. Include:

\usepackage{url}

in your TEX document, and then you can have a prettier entry.

@misc{CD4007,
  author={Texas Instruments},
  title={CD4007UB},
  howpublished = "\url{http://www.ti.com/lit/ds/symlink/cd4007ub.pdf}",
  note={original document from Harris Semiconductor},
  publisher={Texas Instruments},
  year={2012}
}