File: autoconf.info,  Node: Compilers and Preprocessors,  Next: System Services,  Prev: Types,  Up: Existing Tests

5.10 Compilers and Preprocessors
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All the tests for compilers (‘AC_PROG_CC’, ‘AC_PROG_CXX’, ‘AC_PROG_F77’)
define the output variable ‘EXEEXT’ based on the output of the compiler,
typically to the empty string if Posix and ‘.exe’ if a DOS variant.

   They also define the output variable ‘OBJEXT’ based on the output of
the compiler, after ‘.c’ files have been excluded, typically to ‘o’ if
Posix, ‘obj’ if a DOS variant.

   If the compiler being used does not produce executables, the tests
fail.  If the executables can't be run, and cross-compilation is not
enabled, they fail too.  *Note Manual Configuration::, for more on
support for cross compiling.

* Menu:

* Specific Compiler Characteristics::  Some portability issues
* Generic Compiler Characteristics::  Language independent tests and features
* C Compiler::                  Checking its characteristics
* C++ Compiler::                Likewise
* Objective C Compiler::        Likewise
* Objective C++ Compiler::      Likewise
* Erlang Compiler and Interpreter::  Likewise
* Fortran Compiler::            Likewise
* Go Compiler::                 Likewise