no make target for mkoctfile.exe

[Benjamin Lindner]

Hello,

I am trying to build current development sources for mingw,
and the build succeeds past building the documentation, but
then fails with

Making all in test
make[2]: Entering directory 
`/octmgw32/octave/.build_mingw32_octave-tip-4_gcc-4.4.0-dw2/test'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory 
`/octmgw32/octave/.build_mingw32_octave-tip-4_gcc-4.4.0-dw2/test'
make[2]: Entering directory 
`/octmgw32/octave/.build_mingw32_octave-tip-4_gcc-4.4.0-dw2'
make[2]: *** No rule to make target `mkoctfile.exe', needed by `all-am'. 
 Stop.
make[2]: Leaving directory 
`/octmgw32/octave/.build_mingw32_octave-tip-4_gcc-4.4.0-dw2'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory 
`/octmgw32/octave/.build_mingw32_octave-tip-4_gcc-4.4.0-dw2'
make: *** [all] Error 2

I then commented out the make rule for mkoctfile.exe in makefile.am
as

diff -r c146b308739f Makefile.am
--- a/Makefile.am       Thu Jan 14 14:07:33 2010 +0100
+++ b/Makefile.am       Sat Jan 16 17:58:42 2010 +0100
@@ -144,11 +144,11 @@
 mkoctfile.cc: mkoctfile.cc.in Makefile
        @$(do_subst_config_vals)

-# ifneq ($(EXEEXT),)
-# mkoctfile$(EXEEXT): mkoctfile.o
-#      $(LD_CXX) $(CPPFLAGS) $(ALL_CXXFLAGS) $(RDYNAMIC_FLAG) \
-#          $(ALL_LDFLAGS) -o $@ mkoctfile.o
-# endif
+ifneq ($(EXEEXT),)
+mkoctfile$(EXEEXT): mkoctfile.o
+       $(LD_CXX) $(CPPFLAGS) $(ALL_CXXFLAGS) $(RDYNAMIC_FLAG) \
+           $(ALL_LDFLAGS) -o $@ mkoctfile.o
+endif

 run-octave: run-octave.in Makefile
        @$(do_subst_script_vals)

but then I get the error

make[2]: Entering directory 
`/octmgw32/octave/.build_mingw32_octave-tip-4_gcc-4.4.0-dw2'
make[2]: *** No rule to make target `mkoctfile.o', needed by 
`mkoctfile.exe'.  Stop.
make[2]: Leaving directory 
`/octmgw32/octave/.build_mingw32_octave-tip-4_gcc-4.4.0-dw2'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory 
`/octmgw32/octave/.build_mingw32_octave-tip-4_gcc-4.4.0-dw2'
make: *** [all] Error 2

Now there is a rule to create mkoctfile.cc from mkoctfile.cc.in.
But I'd thought make could figure out how to compile a .o from a .cc 
file without explicit rules for that, shouldn't it?

benjamin