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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%
Each figure is one person. RecommendsCriticizes

Recommended in 10 of 13 months

  1. November 2025: recommended
  2. December 2025: recommended
  3. January 2026: recommended
  4. February 2026: recommended
  5. March 2026: recommended
  6. April 2026: not recommended
  7. May 2026: recommended
  8. June 2026: not recommended
  9. July 2026: recommended
  10. August 2026: recommended
  11. September 2026: recommended
  12. October 2026: recommended
  13. 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”
  • 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”
  • 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”
  • 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.

glibc compared with 4 alternatives
ProductRecommendCriticizeApprovalMonthsOwnedBadge
musl libc342558%10——
glibcThis page297528%10——
Cosmopolitan libc29683%10—Approved
Sp.h standard library for C112729%1——
GLib6367%4——
See all 9 c++ libraries, ranked

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.”

MixedComment from 16 Oct 2026 in “Last rites for Gentoo's Chromium package”

“It's basically the only library on linux that actually has a strong commitment to providing a stable ABI”

RecommendsComment from 16 Oct 2026 in “Last rites for Gentoo's Chromium package”

“one brain dead decision, to make it basically impossible to use different glibc versions on one instance”

CriticizesComment from 23 Sep 2026 in “Abandoning Scientific Linux Was a Mistake”

“glibc has a bug where it doesn't support communicating a link-local scope ID in its name resolution subsystem.”

CriticizesComment from 31 Aug 2026 in “Transfer files over an Ethernet patch cable”

“glibc's AVX2 based memcpy functions have a non-negligible performance impact”

RecommendsComment from 28 Aug 2026 in “Don't use musl if you care about performance”

“c-libraries can actually do it better in many cases, especially for large copies”

RecommendsComment from 28 Aug 2026 in “Don't use musl if you care about performance”

“Glibc is terribly designed and it is the core component of almost any Linux userspace app today.”

CriticizesComment from 20 Aug 2026 in “Solo – a .so loader for static Linux binaries”

“glibc is backwards compatible as long as a) your program is running on a newer version”

MixedComment from 19 Aug 2026 in “Solo – a .so loader for static Linux binaries”

“glibc uses symbol versions that are forward but not backward compatible”

MixedComment from 19 Aug 2026 in “Solo – a .so loader for static Linux binaries”

“gnu developed a system that worked, and then made it free to everyone to consult and use”

RecommendsComment from 19 Aug 2026 in “Solo – a .so loader for static Linux binaries”

“In their defense the people working on glibc and gcc are pretty intelligent”

MixedComment from 26 Jul 2026 in “Nothing works and everyone is euphoric”

“Reading the linked bug report about executable stacks they fixed it? So they did the right thing.”

RecommendsComment from 21 Jul 2026 in “Linux kernel will support $ORIGIN, sort of”

“I've had instances when the loader would refuse to load the executable because the installed glibc is too new for it.”

CriticizesComment from 21 Jul 2026 in “Linux kernel will support $ORIGIN, sort of”

“glibc is quite compatible”

RecommendsComment from 21 Jul 2026 in “Linux kernel will support $ORIGIN, sort of”

“which do support lots of architectures and more importantly make porting to new architectures or taking advantage of platform features pretty straightforward”

RecommendsComment from 23 May 2026 in “Sp.h is the standard library that C deserves”

“These projects have made controversial design decisions which impact the entire ecosystem of Linux software.”

CriticizesComment from 3 May 2026 in “Windows quality update: Progress we've made since March”

“glibc really doesn’t provide improvements to any of the kernel interfaces or really any comfort stuff for developers.”

CriticizesComment from 3 May 2026 in “Windows API Is Successful Cross-Platform API”

“Each of these libraries is extremely popular and has a user base of billions of devices.”

MixedComment from 2 May 2026 in “A Report on Burnout in Open Source Software Communities (2025) [pdf]”

“policies and principled stance are quite correct and overall "good for humanity"”

MixedComment from 24 Mar 2026 in “Wine 11 rewrites how Linux runs Windows games at kernel with massive speed gains”

“glibc actually does a good job of using symbol versioning”

MixedComment from 24 Mar 2026 in “Wine 11 rewrites how Linux runs Windows games at kernel with massive speed gains”

“those guys bend over backwards to provide strong API compatibilities”

MixedComment from 24 Mar 2026 in “Wine 11 rewrites how Linux runs Windows games at kernel with massive speed gains”

“glibc has been investing heavily in ABI stability”

RecommendsComment from 23 Feb 2026 in “What it means that Ubuntu is using Rust”

“Glibc has been a source of breakage for proprietary software ever since I started using Linux.”

CriticizesComment from 16 Feb 2026 in “I Fixed Windows Native Development”

“The glibc people are so serious about backward and forward compatibility”

RecommendsComment from 15 Feb 2026 in “I Fixed Windows Native Development”

“glibc is the only one who even has a compatibility story”

RecommendsComment from 27 Jan 2026 in “The Holy Grail of Linux Binary Compatibility: Musl and Dlopen”

“debugged and hardened run-everywhere never-fails code”

RecommendsComment from 27 Jan 2026 in “The C-Shaped Hole in Package Management”

“What I find amazing is why people continously claim glibc is the problem here.”

RecommendsComment from 26 Jan 2026 in “The Holy Grail of Linux Binary Compatibility: Musl and Dlopen”

“Because I do not like certain decisions in the design of glibc, I am skeptical about their ability do define good standard APIs”

CriticizesComment from 22 Jan 2026 in “Gathering Linux Syscall Numbers in a C Table”

“Getting all of LLVM mesa linux cmake ninja glibc gcc binutils xorg KDE to work is more work than in 2005 or 2010.”

MixedComment from 21 Jan 2026 in “Linux from Scratch”

“It did help for programs built by those who know what they are doing.”

MixedComment from 12 Jan 2026 in “Win32 is the stable Linux ABI”

“But Glibc has pretty good ABI compatibility.”

RecommendsComment from 12 Jan 2026 in “Win32 is the stable Linux ABI”

“It seems impractical to expect every piece of software on your computer to be built against a specific version of a specific library”

CriticizesComment 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”

CriticizesComment 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.”

CriticizesComment from 30 Dec 2025 in “Win32 is the stable Linux ABI”

“At least glibc uses versioned symbols.”

RecommendsComment from 30 Dec 2025 in “Win32 is the stable Linux ABI”

“It's really just an artifact of decisions from decades ago, and the cure is way worse than the disease.”

CriticizesComment from 30 Dec 2025 in “Win32 is the stable Linux ABI”

“The fact that multiple cancellation points are discreetly buried in the paths of these functions is an element of unfortunate design.”

CriticizesComment from 13 Dec 2025 in “Async DNS”

“which has had ABI compatibility for decades”

RecommendsComment from 11 Dec 2025 in “Deprecate like you mean it”

“glibc and a small list of other base system libraries have strong backwards compatibility”

RecommendsComment from 1 Dec 2025 in “Windows drive letters are not limited to A-Z”

“GNU such as GCC and Glibc was also quite useful and successful”

RecommendsComment from 11 Nov 2025 in “Blender 5.1”

Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.