.\" the source, must acknowledge the copyright and authors of this work.
.\"
.\" 2007-10-23 mtk, Nearly a complete rewrite of the earlier page.
-.TH INTRO 3 2010-02-03 "Linux" "Linux Programmer's Manual"
+.TH INTRO 3 2010-09-10 "Linux" "Linux Programmer's Manual"
.SH NAME
intro \- Introduction to library functions
.SH DESCRIPTION
the programmer must define a feature test macro in order to obtain
the declaration of a function from the header file specified
in the man page SYNOPSIS section.
+(Where required, these feature test macros must be defined before including
+.I any
+header files.)
In such cases, the required macro is described in the man page.
For further information on feature test macros, see
.BR feature_test_macros (7).
.\" Various special libraries. The manual pages documenting their functions
.\" specify the library names.
.SH "CONFORMING TO"
-Certain terms and abbreviations are used to indicate Unix variants
+Certain terms and abbreviations are used to indicate UNIX variants
and standards to which calls in this section conform.
See
.BR standards (7).