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[2/2] doc: install: document UBSAN_OPTIONS

Message ID f97c3215024ca9f2754b974215211c95050b39aa.1730409074.git.sam@gentoo.org
State New
Headers show
Series [1/2] doc: install: document bootstrap-ubsan | expand

Commit Message

Sam James Oct. 31, 2024, 9:11 p.m. UTC 
Explain that 'bootstrap-ubsan' won't abort on errors by default and how
to override that by setting UBSAN_OPTIONS.

gcc/ChangeLog:
	PR other/116948

	* doc/install.texi (Building a native compiler): Document UBSAN_OPTIONS.
---
 gcc/doc/install.texi | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
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Patch

diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi
index 85896721a0ac..188ce4ba964a 100644
--- a/gcc/doc/install.texi
+++ b/gcc/doc/install.texi
@@ -3153,7 +3153,9 @@  systems that are running Linux kernel version 5.4 or later.
 
 @item @samp{bootstrap-ubsan}
 Compiles GCC itself using Undefined Behavior Sanitization in order to catch
-undefined behavior within the GCC code.
+undefined behavior within the GCC code.  Note that it does not abort on errors
+by default.  @code{UBSAN_OPTIONS} can be set to change this, like
+@samp{UBSAN_OPTIONS='abort_on_error=1:print_summary=1:print_stacktrace=1'}.
 
 @end table