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Automake includes some support for Objective C.
Any package including Objective C code must define the output variable
OBJC in configure.ac; the simplest way to do this is to use
the AC_PROG_OBJC macro (see Particular
Program Checks in The Autoconf Manual).
A few additional variables are defined when an Objective C source file is seen:
OBJC
The name of the Objective C compiler.
OBJCFLAGS
Any flags to pass to the Objective C compiler.
AM_OBJCFLAGS
The maintainer’s variant of OBJCFLAGS.
OBJCCOMPILE
The command used to actually compile an Objective C source file. The file name is appended to form the complete command line.
OBJCLINK
The command used to actually link an Objective C program.