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| author | Michael Kerrisk <mtk.manpages@gmail.com> | 2016-02-12 20:12:46 +0100 |
|---|---|---|
| committer | Michael Kerrisk <mtk.manpages@gmail.com> | 2016-03-01 20:01:04 +0100 |
| commit | 38d9e98ea32b698b24681b94ccd60a24185d3ac1 (patch) | |
| tree | 31aa9911272e8d19045694cbfbfdf43df0693abd /man7/feature_test_macros.7 | |
| parent | 9db90c7cc98c4630a7682895643f119c575a494e (diff) | |
| download | man-pages-38d9e98ea32b698b24681b94ccd60a24185d3ac1.tar.gz | |
feature_test_macros.7: Give an early hint about some macros being defined by default
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Diffstat (limited to 'man7/feature_test_macros.7')
| -rw-r--r-- | man7/feature_test_macros.7 | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/man7/feature_test_macros.7 b/man7/feature_test_macros.7 index d8c6134c95..527bf733cb 100644 --- a/man7/feature_test_macros.7 +++ b/man7/feature_test_macros.7 @@ -139,6 +139,12 @@ The macros that you most likely need to use in modern source code are .BR _DEFAULT_SOURCE (to get definitions that would normally be provided by default). .IP * +Certain macros are defined with default values. +Thus, although one or more macros may be indicated as being +required in the SYNOPSIS of a man page, +it may not be necessary to define them explicitly. +Full details of the defaults are given later in this man page. +.IP * Defining .BR _XOPEN_SOURCE with a value of 600 or greater produces the same effects as defining |