Version:           3.2.1 (using KDE KDE 3.3.0KDE 1.2)
Installed from:    Mandrake RPMsMandrake RPMs
Compiler:          3.4.3 
OS:                Linux

After i create a project in C++ and make a litle program, build the project. Problem is that the ./configure puts a ".C" extension to the final executable. This is an exemple:

checking for BSD-compatible nm... /usr/bin/nm -B
checking for a sed that does not truncate output... /bin/sed
checking whether ln -s works... yes
checking how to recognise dependent libraries... pass_all
checking for object suffix... o
checking for executable suffix... .C
checking command to parse /usr/bin/nm -B output... ok
checking for dlfcn.h... yes
checking for ranlib... ranlib

This ./configure file is execute after Run automake & friends
After that i compare a ./configure file from a C project with this C++ ./configure project file, i found that the variable $ac_ext in tha C project configure file is only "$ac_ext=c", but in the configure from the C++ project file is some times "$ac_ext=c", some times "$ac_ext=C". After i change all "$ac_ext=C" into "$ac_ext=c" everything is compiling ok, without ".C" extension. This is a modified configure from a C++ project:

checking for BSD-compatible nm... /usr/bin/nm -B
checking for a sed that does not truncate output... /bin/sed
checking whether ln -s works... yes
checking how to recognise dependent libraries... pass_all
checking for object suffix... o
checking for executable suffix... no
checking command to parse /usr/bin/nm -B output... ok
checking for dlfcn.h... yes
checking for ranlib... ranlib

If i try to run/debug the program, Kdevelop tells me that it cann't find the executable ./my_exec, becouse the name of file is ./my_exec.C