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| author | Manuel López-Ibáñez <manu@gcc.gnu.org> | 2014-10-18 16:10:25 +0000 |
|---|---|---|
| committer | Manuel López-Ibáñez <manu@gcc.gnu.org> | 2014-10-18 16:10:25 +0000 |
| commit | 104e02e991c288a4f428c3e2a44674fab5b5cd8d (patch) | |
| tree | e6adf5517017f5df17f503e47d3a9fe12212a7be /gcc | |
| parent | bf95e88b668dde68de8c5512980eca6c5c9b315b (diff) | |
| download | gcc-104e02e991c288a4f428c3e2a44674fab5b5cd8d.zip gcc-104e02e991c288a4f428c3e2a44674fab5b5cd8d.tar.gz gcc-104e02e991c288a4f428c3e2a44674fab5b5cd8d.tar.bz2 | |
invoke.texi (Options to Request or Suppress Warnings): Explain options precedence.
2014-10-18 Manuel López-Ibáñez <manu@gcc.gnu.org>
* doc/invoke.texi (Options to Request or Suppress Warnings):
Explain options precedence.
(Wtrampolines): Do not indent paragraph.
From-SVN: r216429
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/doc/invoke.texi | 24 |
2 files changed, 22 insertions, 8 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 2e24871..896e77f 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2014-10-18 Manuel López-Ibáñez <manu@gcc.gnu.org> + + * doc/invoke.texi (Options to Request or Suppress Warnings): + Explain options precedence. + (Wtrampolines): Do not indent paragraph. + 2014-10-18 John David Anglin <danglin@gcc.gnu.org> * doc/invoke.texi: Update documentation of hppa -mjump-in-delay option. diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 9f02888..23f272f 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -3263,6 +3263,15 @@ two forms, whichever is not the default. For further language-specific options also refer to @ref{C++ Dialect Options} and @ref{Objective-C and Objective-C++ Dialect Options}. +Some options, such as @option{-Wall} and @option{-Wextra}, turn on other +options, such as @option{-Wunused}, which may turn on further options, +such as @option{-Wunused-value}. The combined effect of positive and +negative forms is that more specific options have priority over less +specific ones, independently of their position in the command-line. For +options of the same specificity, the last one takes effect. Options +enabled or disabled via pragmas (@pxref{Diagnostic Pragmas}) take effect +as if they appeared at the end of the command-line. + When an unrecognized warning option is requested (e.g., @option{-Wunknown-warning}), GCC emits a diagnostic stating that the option is not recognized. However, if the @option{-Wno-} form @@ -4294,14 +4303,13 @@ headers---for that, @option{-Wunknown-pragmas} must also be used. @item -Wtrampolines @opindex Wtrampolines @opindex Wno-trampolines - Warn about trampolines generated for pointers to nested functions. - - A trampoline is a small piece of data or code that is created at run - time on the stack when the address of a nested function is taken, and - is used to call the nested function indirectly. For some targets, it - is made up of data only and thus requires no special treatment. But, - for most targets, it is made up of code and thus requires the stack - to be made executable in order for the program to work properly. +Warn about trampolines generated for pointers to nested functions. +A trampoline is a small piece of data or code that is created at run +time on the stack when the address of a nested function is taken, and is +used to call the nested function indirectly. For some targets, it is +made up of data only and thus requires no special treatment. But, for +most targets, it is made up of code and thus requires the stack to be +made executable in order for the program to work properly. @item -Wfloat-equal @opindex Wfloat-equal |