Determine an Objective C compiler to use. If
OBJC
is not already set in the environment, check for Objective C compilers. Set output variableOBJC
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_OBJC
like this:AC_PROG_OBJC([gcc objcc objc])If using the GNU Objective C compiler, set shell variable
GOBJC
to ‘yes’. If output variableOBJCFLAGS
was not already set, set it to -g -O2 for the GNU Objective C compiler (-O2 on systems where gcc does not accept -g), or -g for other compilers.