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On 12.02.2012 23:42, David Kolf wrote:

Luiz Henrique de Figueiredo wrote:

Lua 5.1.5 (rc1) is now available at
http://www.lua.org/work/lua-5.1.5-rc1.tar.gz


When changing a few files on Windows (MinGW) and re-running make, the
following rule causes an error:


$(LUA_A): $(CORE_O) $(LIB_O)
$(AR) $@ $?
$(RANLIB) $@


"$?" gives only the recently changed files but MinGW needs all files
("$^") to build the DLL. This will cause a lot of "undefined reference
to..." errors.

I currently don't have my GNU/Linux machine at hand so I cannot test
whether "$^" would cause any problems there. (Though I doubt it).
"$^" is a (GNU?) extension (so it probably will work on any OS where GNU make is available). POSIX make[1] only knows @%?<* as internal macros, and "$<" fits best. I think 
$(AR) $@ $(CORE_O) $(LIB_O)
should work in the default case and for MinGW as well.



(I think this problem was already described by others, but I didn't find
the threads now.)

-- David Kolf


Philipp




PS: For reference:
<http://www.gnu.org/software/make/manual/html_node/Automatic-Variables.html>



  [1]: http://pubs.opengroup.org/onlinepubs/009695399/utilities/make.html