Macro to select c++ as default compiler for c files.

[Lakshmi M]

Hi All,

I am working with autotools and i wish to use c++ compiler by default 
for compiling my c files.

USUAL behaviour  :
ex : myexecutable_SOURCES = file.cpp      -> uses c++ compiler
      myexecutable_SOURCES = file.c         -> uses c compiler
(myexecutable_SOURCES is defined in my Makefile.am)

Expected behaviour :
ex : myexecutable_SOURCES = file.cpp      -> uses c++ compiler
      myexecutable_SOURCES = file.c          -> SHOULD USE c++ compiler
(myexecutable_SOURCES is defined in my Makefile.am)

I tried using AC_PROG_CC([c++]) and AC_LANG([C++]) in my configure.ac 
but its still using c compiler.

Can anyone please let me know how to use c++ compiler as default for 
compiling my c files.

Thanks & Regards,
Lakshmi M