musl Linux and glibc are two different implementations of the C standard library, and they differ significantly in several aspects.
History and Usage:
glibc is one of the earlier and most widely used C standard library implementations, with a long development history and broad community support. It is adopted by most Linux distributions, especially in desktop and server environments.
musl is a relatively new implementation designed to provide smaller, faster, and more secure C libraries. It has been adopted by some lightweight Linux distributions, such as Alpine Linux.
Features and Compatibility:
GLBC is comprehensive and complex, supporting multiple extensions and functions, with high stability and reliability.
Although musl has fewer features, it strictly follows the POSIX standard and has much less code than glibc, requiring no additional external dependencies. MUSL's binary compatibility is limited, but with the release of new versions, compatibility is gradually improving.
Performance and Resource Usage:
MUSL is designed to be lightweight, suitable for embedded systems and resource-constrained environments, and can create compact static executable files.
Although GLBC is powerful, it may not be as good as MUSL in terms of resource usage and performance.
Debugging and Development Support:
Because glibc is more comprehensive, it is usually recommended during application debugging and early development.
MUSL may not be as supportive as GLBC in some debugging tools (such as GDB and Ltrace).
Permits and Community Support:
musl uses the MIT license, which is more lenient than glibc's LGPL license, making it easier to publish static executable files.
GLBC has greater community support and broader documentation resources.
Applications in specific fields:
MUSL excels in embedded systems, containerized applications, and lightweight distributions.
GLBC is more common in desktop and server environments, supporting more features and extensions.
Differences among several C standard libraries
1、. Glibc glibc = GNU C Library is a GNU Project (GNU Project) and is the implementation of the C language standard library. Currently, most GNU/Linux systems on desktops and servers use this C language standard library. It actually implements common C library functions, supports many system platforms, and is quite feature-rich, but also relatively bulky and large
2. The Musl-libc C language standard library Musl-libc project has released version 1.0. Musl is a lightweight C standard library designed as an alternative to the GNU C library (glibc), uClibc, or Android Bionic for embedded operating systems and mobile devices. It follows the POSIX 2008 specification and C99 standard, uses the MIT license, and uses Musl's Linux distributions and projects including sabotage, bootstrap-linux, LightCube OS, and more.
3. The developers of glibc have launched Embedded glibc, abbreviated as eglibc, whose main purpose is to apply glibc to embedded applications. The biggest change is to make more library functions configurable. This way, if you don't need certain functions in your embedded system, you can trim them without compiling them into your eglibc library, reducing the size of the final generated eglibc library and meeting your embedded system's requirements (not exceeding a certain size). This way, you can use glibc for embedded system purposes.
4. uClibc is a small C language standard library, mainly used for embedded systems. It was originally designed for uClinux (note: uClinux does not support MMU), so it is more suitable for microprocessors. Correspondingly, here 'u' stands for μ, Micro, or 'tiny'. Features of uClibc: (1) uClibc is much smaller than glibc. (2) uClibc is independent, completely reimplemented for use in embedded systems. It is incompatible with glibc in both source code structure and binary.
The table below shows the file sizes compiled by different libc libraries.
|
Posted on44 seconds ago
|
|
|
|
