(autoconf.info)Existing Tests
4 Existing Tests
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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 (Note: 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 (Note: Caching Results).
Some of these macros set output variables. Note: 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". Note: Defining Symbols, for how to get those symbol
definitions into your program.
- Alternative Programs
- Selecting between alternative programs.
- Libraries
- Library archives that might be missing.
- Library Functions
- C library functions that might be missing.
- Header Files
- Header files that might be missing.
- Structures
- Structures or members that might be missing.
- Typedefs
- 'typedef's that might be missing.
- C Compiler Characteristics
- Fortran 77 Compiler Characteristics
- System Services
- Operating system services.
- UNIX Variants
- Special kludges for specific UNIX variants.
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