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5.10 Compilers and Preprocessors

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 Unix and `.exe' if Win32 or OS/2.

They also define the output variable OBJEXT based on the output of the compiler, after `.c' files have been excluded, typically to `o' if Unix, `obj' if Win32.

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. See section 11. Manual Configuration, for more on support for cross compiling.

5.10.1 Specific Compiler Characteristics  Some portability issues
5.10.2 Generic Compiler Characteristics  Language independent tests
5.10.3 C Compiler Characteristics  Checking its characteristics
5.10.4 C++ Compiler Characteristics  Likewise
5.10.5 Fortran 77 Compiler Characteristics  Likewise

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