gnutools, 6 months ago to random

Great recommendations for #GCC compiler options to harden C and C++. https://best.openssf.org/Compiler-Hardening-Guides/Compiler-Options-Hardening-Guide-for-C-and-C++.html

skaly, 6 months ago to Israel

"Zionists all hate Palestinians and want to ethnic cleanse them."
Literally every Zionist and Jewish protest:
100k people singing songs for peace together
We don't want this war. Never did. We love being the only democracy and only safe state in the middle east for LGBTQIA+ folks. We love each other, love our Beduin, Druze and Muslim Israeli brothers and sisters. We want peace. But then Gazans behead our children while screaming "Yehud" (Jews) and the world denies it. Then there's war. #israel

jperkin, 7 months ago to random

Compiler folks!

Let's say I'm using _Float16 on a system which doesn't support FP16.

If I compile it directly to a program then libgcc does its thing and __extendhfdf2 etc is pulled in transparently. All good.

If I compile it as a shared library, it is not, and I have to add -lgcc manually to avoid undefined symbols.

Is this expected behaviour? If not, where should I start looking?

Thanks!

#gcc

fsf, 7 months ago to emacs

Assigning your copyright to the FSF helps defend the GPL and keep software free. Thanks to Gene Goykhman, Sergey Alexandrovich Bugaev, Wang Diancheng, Warren Thomas Everett Wilkinson, and Xinyuan Zhang for assigning their copyright to the FSF! #GNU #Emacs #glibc #GDB #GNUstep #GNUHurd #GNUMach #GCC Learn more at https://u.fsf.org/3ht #CopyrightAssignments

fsf, 7 months ago to emacs

Assigning your copyright to the FSF helps defend the GPL and keep software free. Thanks to Benjamin Woodruff, Jeffrey Bencteux, John Muhl, Matheus Branco Borella, Sergey Alexandrovich Bugaev, and Wang Diancheng for assigning their copyright to the FSF! #Inetutils, #GDB, #GCC, #GNUCLib, #GNUHurd, #GNUMach, #GNUstep, #Emacs, and more: https://u.fsf.org/3ht #CopyrightAssignments

fsf, 7 months ago to emacs

Assigning your copyright to the FSF helps defend the GPL and keep software free. Thanks to Benjamin Woodruff, Jeffrey Bencteux, John Muhl, Matheus Branco Borella, Sergey Alexandrovich Bugaev, and Wang Diancheng for assigning their copyright to the FSF! #Inetutils, #GDB, #GCC, #GNUCLib, #GNUHurd, #GNUMach, #GNUstep, #Emacs, and more: https://u.fsf.org/3ht #CopyrightAssignments

profoundlynerdy, 7 months ago to programming

Is there a reasonably exhaustive list of "footguns" and undefined behavior for the #C language?

#programming #linux #openbsd #netbsd #gcc #clang

itnewsbot, 7 months ago to linux

Linux Fu: Customizing Printf - When it comes to programming in C and, sometimes, C++, the printf function is a ja... - https://hackaday.com/2023/10/24/linux-fu-customizing-printf/ #softwaredevelopment #hackadaycolumns #linuxhacks #printf #linux #gcc

gnutools, 7 months ago to random

GCC 14 is on track. Stage 1 development ending November 19th. Fantastic improvements on the way - analysis, diagnostics, architecture, optimization, debugging. The core of the GNU/Linux ecosystem. #GCC https://gcc.gnu.org/pipermail/gcc/2023-October/242733.html

jdapena, 7 months ago to random Spanish

This week I will be attending BlinkOn 18. You are still in time to attend to, at least remotely! https://www.chromium.org/events/blinkon-18/

I will do two presentations this time.

On tuesday, I will present a lightning talk where I will talk about the updates to the status of #GCC support in #Chromium.

Then, on wednesday, I will host a breakout session about the challenges of maintaining #downstream projects on top of Chromium.

See you at #BlinkOn!

cc @igalia

fsf, 8 months ago to emacs

Assigning your copyright to the FSF helps defend the GPL and keep software free. Thanks to Benjamin Woodruff, Jeffrey Bencteux, John Muhl, Matheus Branco Borella, Sergey Alexandrovich Bugaev, and Wang Diancheng for assigning their copyright to the FSF! #Inetutils, #GDB, #GCC, #GNUCLib, #GNUHurd, #GNUMach, #GNUstep, #Emacs, and more: https://u.fsf.org/3ht #CopyrightAssignments

abcdw, 8 months ago to llvm

I have half an hour trip to climbing gym and back 3 times a week. Not to waste this time I take my laptop with downloaded materials with me and watch courses.

Previously it was OCaml course, now it is Advanced Compilers course:
https://www.cs.cornell.edu/courses/cs6120/2023fa/self-guided/

#llvm #gcc #compilers #scheme #racket #guile #lisp #clojure

doctormo, 8 months ago (edited 8 months ago) to cpp

Dear social search; we've recently started compiling with C++20 and we're getting a ton of warnings for lambdas. While I'm not in a position to fix them, I need to suppress those warnings so I can see actual errors.

Problem is, google's #search is just bad and keeps giving me results for "how to make warnings into errors" which is not what I want.

Edit: -Wno-deprecated is in the docs. But not how to use with cmake.

Do you know?

#cpp #programming #gcc #compiling #help

trofi, 8 months ago to random

Today's gcc bug is a gcc compilation performance problem:
https://gcc.gnu.org/PR111619

Final gcc is compiled with -O2 by default (intended) and booter gcc is compiled with -O0 (also intended).

But unoptimized gcc is very inefficient at handling huge generated files like insn-recog.cc.

#gcc #bug

fsf, 8 months ago to emacs

Assigning your copyright to the FSF helps defend the GPL and keep software free. Thanks to Benjamin Woodruff, Jeffrey Bencteux, John Muhl, Matheus Branco Borella, Sergey Alexandrovich Bugaev, and Wang Diancheng for assigning their copyright to the FSF! #Inetutils, #GDB, #GCC, #GNUCLib, #GNUHurd, #GNUMach, #GNUstep, #Emacs, and more: https://u.fsf.org/3ht #CopyrightAssignments

unixbhaskar, 8 months ago to linux

Hmmmmm 🤔

#linux #research #gentoo #gcc #sysadmin #linuxadmin #eopensource

fsf, 8 months ago to emacs

Assigning your copyright to the FSF helps defend the GPL and keep software free. Thanks to Gene Goykhman, Sergey Alexandrovich Bugaev, Wang Diancheng, Warren Thomas Everett Wilkinson, and Xinyuan Zhang for assigning their copyright to the FSF! #GNU #Emacs #glibc #GDB #GNUstep #GNUHurd #GNUMach #GCC Learn more at https://u.fsf.org/3ht #CopyrightAssignments

rml, 8 months ago to rust

#GCC size: 343Mb*
#Rust size: 1Gb
#GHC size: 1.4Gb
#Clang size: 1.7Gb

#Chez #Scheme size: 5mb

[ * ] all based on the results of using #guix size, removing common and documentation-based dependencies such as ncurses, bash, and zlib

bluedevil, 8 months ago to stackoverflow

New vulnerability exposed on GCC. @Azeria and Tom Hebb, has discovered a brand new 0-day in GCC. On GCC's AArch64 version, stack protection doesn't detect overflows of dynamically-sized local variables. Vulnerability fixed! But there are a lot of binaries in the wild which has this vulnerability.

https://github.com/metaredteam/external-disclosures/security/advisories/GHSA-x7ch-h5rf-w2mf

https://rtx.meta.security/mitigation/2023/09/12/CVE-2023-4039.html

#0-day #gcc #vulnerability #stackoverflow #smashthestack

fsf, 9 months ago to emacs

Assigning your copyright to the FSF helps defend the GPL and keep software free. Thanks to Gene Goykhman, Sergey Alexandrovich Bugaev, Wang Diancheng, Warren Thomas Everett Wilkinson, and Xinyuan Zhang for assigning their copyright to the FSF! #GNU #Emacs #glibc #GDB #GNUstep #GNUHurd #GNUMach #GCC Learn more at https://u.fsf.org/3ht #CopyrightAssignments

trofi, 9 months ago to random

Today's gcc bug https://gcc.gnu.org/PR111051 is a case where gcc stopped recognizing some avx2 primitives on avx512 code (all on highway-1.0.6 code again):

#include <immintrin.h>

#pragma GCC target("avx512vl,avx512dq")

void bug(__m256i i) {
volatile auto v1 = _mm256_cvtepi64_pd(i);
}

and failed as error: inlining failed in call to 'always_inline' '__m256d _mm256_setzero_pd()': target specific option mismatch

#gcc #bug

trofi, 9 months ago to random

Today's gcc bug is https://gcc.gnu.org/PR111048 where gcc generated wrong code for highway-1.0.6 library in -mavx2 mode.

When handling the following loop:

u8 in_lanes[32];
for (unsigned i = 0; i < 32; i += 2) {
in_lanes[i + 0] = 0;
in_lanes[i + 1] = ((u8)0xff) >> (i & 7);
}

gcc broke i =12 iteration and instead of i[13] = 0xf; (0xff >> 4) stored something like i[13] = 0xef; there.

#gcc #bug

ademalsasa, 3 years ago to foss

My Mastodon Posts June 2020

• Graphics Tools Poll https://floss.social/@ademalsasa/104322353322133383
• List of Distros Officials https://floss.social/@ademalsasa/104309257301275277
• Graphics Tools List https://floss.social/@ademalsasa/104341045707458765
• User Friendly Resources https://floss.social/@ademalsasa/104303641285042714
• Awesome Free Software https://floss.social/@ademalsasa/104352228377420642
• Peertube Guide for YouTubers https://floss.social/@ademalsasa/104235340156599605
• Librehost Overview of Mine https://floss.social/@ademalsasa/104034618932368527
• Libre Speed Test https://floss.social/@ademalsasa/104019444489789834
• Alternative World vs Gafam https://floss.social/@ademalsasa/104001452551058243

#freesw #foss #mastodon

My post about list of GNU/Linux distros we can follow at Mastodon showing a picture of Ubuntu, Fedora, Debian, etc., and with hundreds of reshares and likes and replies.
My post titled Ubuntu 20.04 Graphic Design Suite with a picture of Akira, GIMP, Inkscape, Krita, etc. It was originally published on https://www.ubuntubuzz.com.
My post titled User Friendly Resources to Learn GNU/Linux with three pictures of getgnulinux.org, and trylinux.today, and flossmanuals.net websites.