mirror of
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572a2e2eb9
internally, printf always works with the maximal-size supported integer and floating point formats. however, the space needed to format a floating point number is proportional to the mantissa and exponent ranges. on archs where long double is larger than double, knowing that the actual value fit in double allows us to use a much smaller buffer, roughly 1/16 the size. as a bonus, making the working buffer a VLA whose dimension depends on the format specifier prevents the compiler from lifting the stack adjustment to the top of printf_core. this makes it so printf calls without floating point arguments do not waste even the smaller amount of stack space needed for double, making it much more practical to use printf in tightly stack-constrained environments. |
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| configure | ||
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musl libc
musl, pronounced like the word "mussel", is an MIT-licensed
implementation of the standard C library targetting the Linux syscall
API, suitable for use in a wide range of deployment environments. musl
offers efficient static and dynamic linking support, lightweight code
and low runtime overhead, strong fail-safe guarantees under correct
usage, and correctness in the sense of standards conformance and
safety. musl is built on the principle that these goals are best
achieved through simple code that is easy to understand and maintain.
The 1.1 release series for musl features coverage for all interfaces
defined in ISO C99 and POSIX 2008 base, along with a number of
non-standardized interfaces for compatibility with Linux, BSD, and
glibc functionality.
For basic installation instructions, see the included INSTALL file.
Information on full musl-targeted compiler toolchains, system
bootstrapping, and Linux distributions built on musl can be found on
the project website:
http://www.musl-libc.org/