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* [gcc r13-5453] Clarify -shared effect on crtfastmath.o
@ 2023-01-27 14:47 Richard Biener
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From: Richard Biener @ 2023-01-27 14:47 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:b799acef461bcb78d77819dd27c8e4806177d841
commit r13-5453-gb799acef461bcb78d77819dd27c8e4806177d841
Author: Richard Biener <rguenther@suse.de>
Date: Fri Jan 13 08:57:12 2023 +0100
Clarify -shared effect on crtfastmath.o
This rewords the note to not specifically mention crtfastmath.o
but FP environment altering by -ffast-math or -Ofast.
PR target/55522
* doc/invoke.texi (-shared): Clarify effect on -ffast-math
and -Ofast FP environment side-effects.
Diff:
---
gcc/doc/invoke.texi | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 06d77983e30..a371cd91ef8 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -17696,8 +17696,9 @@ needs to build supplementary stub code for constructors to work. On
multi-libbed systems, @samp{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. For x86, crtfastmath.o will not be added when
-@option{-shared} is specified. }
+is innocuous. @option{-shared} suppresses the addition of startup code
+to alter the floating-point environment as done with @option{-ffast-math},
+@option{-Ofast} or @option{-funsafe-math-optimizations} on some targets.}
@item -shared-libgcc
@itemx -static-libgcc
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