[MITgcm-devel] genmake2 setting sequence

[Jean-Michel Campin]

Hi Constantinos,

I am trying to make a short summary of how things are set 
in genmake2:

for most flag/option/variables, the normal sequence is:
a) reset flag ;
b) execute "genmake_local" if it exists
c) parse the command line options.
d) execute the optfile

Some exceptions:
* FC, CC, CPP, LDADD, MAKEFILE, MAKEDEPEND, AWK and HAVE_SETRLSTK 
  are not reset (skip a)
* default INCLUDES is not empty (default: INCLUDES="-I. $INCLUDES")

I think there is a reason why genmake_local is run before the optfile,
since it might contains the optfile name (like the AD_OPTFILE).
I don't know why genmake_local is run before the command line
options (but does not seem too bad).

Regarding MAKEDEPEND, if you want to get the makedepend from
genmake_local to overwrite the default, you could pre-define
MAKEDEPEND in your environment (instead of in the optfile)
and if one specific makedepend is in genmake_local it will 
be used instead of your default environment.

Cheers,
Jean-Michel