glibc
Shares rank 2 of 9 c++ libraries by recommenders
Free C library praised for strong ABI stability and backward compatibility; critics say its design decisions and versioned symbols hurt portability.
Free C library praised for strong ABI stability and backward compatibility; critics say its design decisions and versioned symbols hurt portability.
104 people gave an opinion
- recommend it
- 29
- criticize it
- 75
- approval share
- 28%
Recommended in 10 of 13 months
- November 2025: recommended
- December 2025: recommended
- January 2026: recommended
- February 2026: recommended
- March 2026: recommended
- April 2026: not recommended
- May 2026: recommended
- June 2026: not recommended
- July 2026: recommended
- August 2026: recommended
- September 2026: recommended
- October 2026: recommended
- November 2026: not recommended (month in progress)
Why it doesn’t carry the badge
- 29 people recommend itNeeds 10 or more, met.
- 0.3 recommenders for every criticNeeds 2 to 1 or better, not met.
- Recommended in 10 of 13 monthsNeeds 4 or more, met.
The same three rules apply to every product, and the badge can’t be bought. How the badge works
What people say about it
The reasons people give, with the number of comments that give each one. Open a reason to read what they said.
Why people recommend it
Each mark is one comment
Strong ABI and backward compatibility
“It's basically the only library on linux that actually has a strong commitment to providing a stable ABI”
Comment from 16 Oct 2026 in “Last rites for Gentoo's Chromium package” “glibc and a small list of other base system libraries have strong backwards compatibility”
Comment from 1 Dec 2025 in “Windows drive letters are not limited to A-Z” “glibc is backwards compatible as long as a) your program is running on a newer version”
Comment from 19 Aug 2026 in “Solo – a .so loader for static Linux binaries” - Comment from 15 Feb 2026 in “I Fixed Windows Native Development”
- Comment from 24 Mar 2026 in “Wine 11 rewrites how Linux runs Windows games at kernel with massive speed gains”
- Comment from 27 Jan 2026 in “The Holy Grail of Linux Binary Compatibility: Musl and Dlopen”
- Comment from 23 Feb 2026 in “What it means that Ubuntu is using Rust”
- Comment from 12 Jan 2026 in “Win32 is the stable Linux ABI”
- Comment from 11 Dec 2025 in “Deprecate like you mean it”
- Comment from 21 Jul 2026 in “Linux kernel will support $ORIGIN, sort of”
Careful symbol versioning
“glibc actually does a good job of using symbol versioning”
Comment from 24 Mar 2026 in “Wine 11 rewrites how Linux runs Windows games at kernel with massive speed gains” “At least glibc uses versioned symbols.”
Comment from 30 Dec 2025 in “Win32 is the stable Linux ABI” Free, widely deployed, successful
“gnu developed a system that worked, and then made it free to everyone to consult and use”
Comment from 19 Aug 2026 in “Solo – a .so loader for static Linux binaries” “Each of these libraries is extremely popular and has a user base of billions of devices.”
Comment from 2 May 2026 in “A Report on Burnout in Open Source Software Communities (2025) [pdf]” “GNU such as GCC and Glibc was also quite useful and successful”
Comment from 11 Nov 2025 in “Blender 5.1” Skilled, careful developers
“In their defense the people working on glibc and gcc are pretty intelligent”
Comment from 26 Jul 2026 in “Nothing works and everyone is euphoric” “It did help for programs built by those who know what they are doing.”
Comment from 12 Jan 2026 in “Win32 is the stable Linux ABI” “debugged and hardened run-everywhere never-fails code”
Comment from 27 Jan 2026 in “The C-Shaped Hole in Package Management”
What people warn about
Each mark is one comment
Questionable design decisions
“The fact that multiple cancellation points are discreetly buried in the paths of these functions is an element of unfortunate design.”
Comment from 13 Dec 2025 in “Async DNS” “Because I do not like certain decisions in the design of glibc, I am skeptical about their ability do define good standard APIs”
Comment from 22 Jan 2026 in “Gathering Linux Syscall Numbers in a C Table” “These projects have made controversial design decisions which impact the entire ecosystem of Linux software.”
Comment from 3 May 2026 in “Windows quality update: Progress we've made since March” - Comment from 30 Dec 2025 in “Win32 is the stable Linux ABI”
- Comment from 20 Aug 2026 in “Solo – a .so loader for static Linux binaries”
Versioned symbols hurt portability
“It seems impractical to expect every piece of software on your computer to be built against a specific version of a specific library”
Comment from 31 Dec 2025 in “Win32 is the stable Linux ABI” “nothing ever lets you pick which versions to link to. You're going to get the latest ones and you better enjoy that”
Comment from 31 Dec 2025 in “Win32 is the stable Linux ABI” “Versioned glibc symbols are part of the reason that binaries aren't portable across Linux distributions and time.”
Comment from 30 Dec 2025 in “Win32 is the stable Linux ABI” - Comment from 23 Sep 2026 in “Abandoning Scientific Linux Was a Mistake”
Breaks software with newer versions
“I've had instances when the loader would refuse to load the executable because the installed glibc is too new for it.”
Comment from 21 Jul 2026 in “Linux kernel will support $ORIGIN, sort of” “Glibc has been a source of breakage for proprietary software ever since I started using Linux.”
Comment from 16 Feb 2026 in “I Fixed Windows Native Development” Few developer-facing improvements
“glibc really doesn’t provide improvements to any of the kernel interfaces or really any comfort stuff for developers.”
Comment from 3 May 2026 in “Windows API Is Successful Cross-Platform API” “glibc has a bug where it doesn't support communicating a link-local scope ID in its name resolution subsystem.”
Comment from 31 Aug 2026 in “Transfer files over an Ethernet patch cable”
Other c++ libraries people recommend
The four most recommended other c++ libraries, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.
| Product | Recommend | Criticize | Approval | Months | Owned | Badge |
|---|---|---|---|---|---|---|
| musl libc | 34 | 25 | 58% | 10 | — | — |
| glibcThis page | 29 | 75 | 28% | 10 | — | — |
| Cosmopolitan libc | 29 | 6 | 83% | 10 | — | Approved |
| Sp.h standard library for C | 11 | 27 | 29% | 1 | — | — |
| GLib | 6 | 3 | 67% | 4 | — | — |
What people said
40 of the 132 comments that mention it, newest first. Each links to the original comment.
“It might be the best of the linux libraries but it's still not good.”
“It's basically the only library on linux that actually has a strong commitment to providing a stable ABI”
“one brain dead decision, to make it basically impossible to use different glibc versions on one instance”
“glibc has a bug where it doesn't support communicating a link-local scope ID in its name resolution subsystem.”
“glibc's AVX2 based memcpy functions have a non-negligible performance impact”
“c-libraries can actually do it better in many cases, especially for large copies”
“Glibc is terribly designed and it is the core component of almost any Linux userspace app today.”
“glibc is backwards compatible as long as a) your program is running on a newer version”
“glibc uses symbol versions that are forward but not backward compatible”
“gnu developed a system that worked, and then made it free to everyone to consult and use”
“In their defense the people working on glibc and gcc are pretty intelligent”
“Reading the linked bug report about executable stacks they fixed it? So they did the right thing.”
“I've had instances when the loader would refuse to load the executable because the installed glibc is too new for it.”
“glibc is quite compatible”
“which do support lots of architectures and more importantly make porting to new architectures or taking advantage of platform features pretty straightforward”
“These projects have made controversial design decisions which impact the entire ecosystem of Linux software.”
“glibc really doesn’t provide improvements to any of the kernel interfaces or really any comfort stuff for developers.”
“Each of these libraries is extremely popular and has a user base of billions of devices.”
“policies and principled stance are quite correct and overall "good for humanity"”
“glibc actually does a good job of using symbol versioning”
“those guys bend over backwards to provide strong API compatibilities”
“glibc has been investing heavily in ABI stability”
“Glibc has been a source of breakage for proprietary software ever since I started using Linux.”
“The glibc people are so serious about backward and forward compatibility”
“glibc is the only one who even has a compatibility story”
“debugged and hardened run-everywhere never-fails code”
“What I find amazing is why people continously claim glibc is the problem here.”
“Because I do not like certain decisions in the design of glibc, I am skeptical about their ability do define good standard APIs”
“Getting all of LLVM mesa linux cmake ninja glibc gcc binutils xorg KDE to work is more work than in 2005 or 2010.”
“It did help for programs built by those who know what they are doing.”
“But Glibc has pretty good ABI compatibility.”
“It seems impractical to expect every piece of software on your computer to be built against a specific version of a specific library”
“nothing ever lets you pick which versions to link to. You're going to get the latest ones and you better enjoy that”
“Versioned glibc symbols are part of the reason that binaries aren't portable across Linux distributions and time.”
“At least glibc uses versioned symbols.”
“It's really just an artifact of decisions from decades ago, and the cure is way worse than the disease.”
“The fact that multiple cancellation points are discreetly buried in the paths of these functions is an element of unfortunate design.”
“which has had ABI compatibility for decades”
“glibc and a small list of other base system libraries have strong backwards compatibility”
“GNU such as GCC and Glibc was also quite useful and successful”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.