(autoconf.info.gz) Existing Tests

 
 Existing Tests
 **************
 
    These macros test for particular system features that packages might
 need or want to use.  If you need to test for a kind of feature that
 none of these macros check for, you can probably do it by calling
 primitive test macros with appropriate arguments ( Writing
 Tests).
 
    These tests print messages telling the user which feature they're
 checking for, and what they find.  They cache their results for future
 `configure' runs ( Caching Results).
 
    Some of these macros set output variables.   Makefile
 Substitutions, for how to get their values.  The phrase "define NAME"
 is used below as a shorthand to mean "define C preprocessor symbol NAME
 to the value 1".   Defining Symbols, for how to get those symbol
 definitions into your program.

 
* Common Behavior             Macros' standard schemes
* Alternative Programs        Selecting between alternative programs
* Files                       Checking for the existence of files
* Libraries                   Library archives that might be missing
* Library Functions           C library functions that might be missing
* Header Files                Header files that might be missing
* Declarations                Declarations that may be missing
* Structures                  Structures or members that might be missing
* Types                       Types that might be missing
* Compilers and Preprocessors  Checking for compiling programs
* System Services             Operating system services
* UNIX Variants               Special kludges for specific UNIX variants

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