Next: Erlang Compiler and Interpreter Characteristics, Previous: Objective C Compiler Characteristics, Up: Compilers and Preprocessors [Contents][Index]
Determine an Objective C++ compiler to use. If OBJCXX is not already
set in the environment, check for Objective C++ compilers. Set output
variable OBJCXX to the name of the compiler found.
This macro may, however, be invoked with an optional first argument
which, if specified, must be a blank-separated list of Objective C++ compilers
to search for. This just gives the user an opportunity to specify an
alternative search list for the Objective C++ compiler. For example, if you
didn’t like the default order, then you could invoke AC_PROG_OBJCXX
like this:
AC_PROG_OBJCXX([gcc g++ objcc++ objcxx])
If using a compiler that supports GNU Objective C++, set shell variable
GOBJCXX to ‘yes’. If output variable OBJCXXFLAGS was not
already set, set it to -g -O2 for a GNU Objective C++
compiler (-O2 on systems where the compiler does not accept
-g), or -g for other compilers.
Set output variable OBJCXXCPP to a command that runs the Objective C++
preprocessor. If ‘$OBJCXX -E’ doesn’t work, tries cpp and
/lib/cpp, in that order. Because of this fallback, CXXCPP
may or may not set Objective-C++-specific predefined macros (such as
__cplusplus and __OBJC__).