diff options
Diffstat (limited to 'ld/ld.texi')
| -rw-r--r-- | ld/ld.texi | 27 |
1 files changed, 27 insertions, 0 deletions
@@ -2653,6 +2653,33 @@ Warn if any global constructors are used. This is only useful for a few object file formats. For formats like COFF or ELF, the linker can not detect the use of global constructors. +@kindex --warn-execstack +@cindex warnings, on exectuable stack +@cindex executable stack, warnings on +@item --warn-execstack +@itemx --no-warn-execstack +On ELF platforms this option controls how the linker generates warning +messages when it creates an output file with an executable stack. By +default the linker will not warn if the @command{-z execstack} command +line option has been used, but this behaviour can be overridden by the +@option{--warn-execstack} option. + +On the other hand the linker will normally warn if the stack is made +executable because one or more of the input files need an execuable +stack and neither of the @command{-z execstack} or @command{-z +noexecstack} comman line options have been specified. This warning +can be disabled via the @command{--no-warn-execstack} option. + +Note: ELF format input files specify that they need an executable +stack by having a @var{.note.GNU-stack} section with the executable +bit set in its section flags. They can specify that they do not need +an executable stack by having that section, but without the executable +flag bit set. If an input file does not have a @var{.note.GNU-stack} +section present then the default behaviour is target specific. For +some targets, then absence of such a section implies that an +executable stack @emph{is} required. This is often a problem for hand +crafted assembler files. + @kindex --warn-multiple-gp @item --warn-multiple-gp Warn if multiple global pointer values are required in the output file. |