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| author | Marc Espie <espie@openbsd.org> | 2000-10-17 05:20:14 +0000 |
|---|---|---|
| committer | Marc Espie <espie@gcc.gnu.org> | 2000-10-17 05:20:14 +0000 |
| commit | 1d3b0e2c196a53b8d0e0b8ecabf5b110f666c442 (patch) | |
| tree | db91e91a531999db07c075e08113e38eb57ca46f /gcc | |
| parent | 1c2171710da6d0eff5b4b230726f1ff568e1a216 (diff) | |
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invoke.texi (-shared): Insist on requiring code generation flags to be used along with -shared...
2000-10-17 Marc Espie <espie@openbsd.org>
* invoke.texi (-shared): Insist on requiring code generation flags
to be used along with -shared, and document the subtle failure that
may occur otherwise.
From-SVN: r36896
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/invoke.texi | 12 |
2 files changed, 15 insertions, 3 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 76e17bb..a93203a 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2000-10-17 Marc Espie <espie@openbsd.org> + + * invoke.texi (-shared): Insist on requiring code generation flags + to be used along with -shared, and document the subtle failure that + may occur otherwise. + 2000-10-16 J. David Anglin <dave@hiauly1.hia.nrc.ca> * pa.md (return_internal): Move `use' after `return'. diff --git a/gcc/invoke.texi b/gcc/invoke.texi index d7320d1..52586dd 100644 --- a/gcc/invoke.texi +++ b/gcc/invoke.texi @@ -3307,9 +3307,15 @@ libraries. On other systems, this option has no effect. @item -shared Produce a shared object which can then be linked with other objects to -form an executable. Not all systems support this option. You must -also specify @samp{-fpic} or @samp{-fPIC} on some systems when -you specify this option. +form an executable. Not all systems support this option. For predictable +results, you must also specify the same set of options that were used to +generate code (@samp{-fpic}, @samp{-fPIC}, or model suboptions) +when you specify this option.@footnote{On some systems, @code{gcc -shared} +needs to build supplementary stub code for constructors to work. On +multi-libbed systems, @code{gcc -shared} must select the correct support +libraries to link against. Failing to supply the correct flags may lead +to subtle defects. Supplying them in cases where they are not necessary +is innocuous.} @item -symbolic Bind references to global symbols when building a shared object. Warn |