[M3devel] unnecessary relinks when import libs change

[Jay]

I see a lot of like:
 
== package C:\\dev2\\cm3.2\m3-obliq\synloc == +++ ['cm3.exe -build -keep -DROOT=/C/dev2/cm3.2 -DCM3_VERSION_TEXT=d5.6.0 -DCM3_VERSION_NUMBER=050600 -DCM3_LAST_CHANGED=2008-01-31 @M3novm', 'cm3.exe -ship -keep -DROOT=/C/dev2/cm3.2 -DCM3_VERSION_TEXT=d5.6.0 -DCM3_VERSION_NUMBER=050600 -DCM3_LAST_CHANGED=2008-01-31 @M3novm'] +++
--- building in NT386GNU ---
 
ignoring ../src/m3overrides
new "/C/cm3/pkg/libm3/NT386GNU/m3.lib" -> archiving synwr.lib           *** This line ****mklib  -out:synwr.lib  SynWr.io SynWr.mo SynLocation.io SynLocation.mo 2>&1 > synwr.lstgcc -shared -Wl, at _m3responsefile1.txt 2>&1 > synwr.lstCreating library file: synwr.lib--- shipping from NT386GNU ---
 
This is mildly dumb.
I should check as to why m3.lib changed, but an import .lib changing is rarely legitimate cause for a relink.
As long as no symbols were added or removed, no relink is needed.
Even then, it usually doesn't matter, but harder to tell.
 
It's true the import .libs have "hints" as to "ordinals" but I don't think anyone cares about those.
 
Definitely maybe the fix should be that when the import .lib is made, if the list of symbols exported is identical to the previous version, don't update the file.
 
 - Jay
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