Bug #10802: strict-aliasing warning on RHEL/CentOS 6

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.3.0dev (2015-01-30) [x86_64-linux]
• Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: REQUIRED

[vo.x (Vit Ondruch)]

Is there a chance to suppress the strict-aliasing warning:

string.c: In function [e28098]rb_fstring_new[e28099]:
string.c:270: warning: dereferencing pointer [e28098]fake_str.60[e28099] does break strict-aliasing rules
string.c:270: note: initialized from here

Which I observe on RHEL6:

http://c64b.rubyci.org/~chkbuild/ruby-trunk/log/20150130T092302Z.log.html.gz

[jaruga (Jun Aruga)]

I could see still this error on trunk

http://rubyci.s3.amazonaws.com/c64b/ruby-trunk/log/20160627T090203Z.log.html.gz

compiling string.c
string.c: In function ‘rb_fstring_new’:
string.c:349: 警告: dereferencing pointer ‘fake_str.121’ does break strict-aliasing rules
string.c:349: note: initialized from here
string.c: In function ‘rb_fstring_enc_new’:
string.c:349: 警告: dereferencing pointer ‘fake_str.121’ does break strict-aliasing rules
string.c:349: note: initialized from here
string.c: In function ‘rb_fstring_cstr’:
string.c:349: 警告: dereferencing pointer ‘fake_str.121’ does break strict-aliasing rules
string.c:349: note: initialized from here
string.c: In function ‘rb_fstring_enc_cstr’:
string.c:349: 警告: dereferencing pointer ‘fake_str.121’ does break strict-aliasing rules
string.c:349: note: initialized from here

[shyouhei (Shyouhei Urabe)]

• Related to Bug #12191: Violation of ANSI aliasing rules causing problems while compiling added

[vo.x (Vit Ondruch)]

• Status changed from Open to Closed

Fixed by r55831 and r55833. Backport requested in #12657.