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Clarify inline substitution failure.

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From-SVN: r25103
This commit is contained in:
Richard Henderson 1999-02-08 14:02:13 -08:00
parent 29ae5b8934
commit 247b14bd49
1 changed files with 9 additions and 3 deletions
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gcc/extend.texi
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@ -2258,10 +2258,16 @@ inc (int *a)
(If you are writing a header file to be included in ANSI C programs, write
@code{__inline__} instead of @code{inline}. @xref{Alternate Keywords}.)
You can also make all ``simple enough'' functions inline with the option
@samp{-finline-functions}. Note that certain usages in a function
definition can make it unsuitable for inline substitution.
@samp{-finline-functions}.
Note that certain usages in a function definition can make it unsuitable
for inline substitution. Among these usages are: use of varargs, use of
alloca, use of variable sized data types (@pxref{Variable Length}),
use of computed goto (@pxref{Labels as Values}), use of nonlocal goto,
and nested functions (@pxref{Nested Functions}). Using @samp{-Winline}
will warn when a function marked @code{inline} could not be substituted,
and will give the reason for the failure.
Note that in C and Objective C, unlike C++, the @code{inline} keyword
does not affect the linkage of the function.