diff options
Diffstat (limited to 'nuttx/lib/Kconfig')
| -rw-r--r-- | nuttx/lib/Kconfig | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/nuttx/lib/Kconfig b/nuttx/lib/Kconfig index ddd5e2dde..77cf62665 100644 --- a/nuttx/lib/Kconfig +++ b/nuttx/lib/Kconfig @@ -30,12 +30,27 @@ config LIB_HOMEDIR ---help--- The home directory to use with operations like such as 'cd ~' -config HAVE_LIBM - bool "Architecture-specific libm.a" +config LIBM + bool "Math library" default n + depends on !ARCH_MATH_H ---help--- - Architecture specific logic provides an implementation of libm.a - and a math.h header file that can be found at include/arch/math.h. + By default, no math library will be provided by NuttX. In this this case, it + is assumed that (1) no math library is required, or (2) you will be using the + math.h header file and the libm library provided by your toolchain. + + This is may be a very good choice is possible because your toolchain may have + have a highly optimized version of libm. + + Another possibility is that you have a custom, architecture-specific math + libary and that the corresponding math.h file resides at arch/<architecture>/include/math.h. + The option is selected via ARCH_MATH_H. If ARCH_MATH_H is selected,then the include/nuttx/math.h + header file will be copied to include/math.h where it can be used by your applications. + + If ARCH_MATH_H is not defined, then this option can be selected to build a generic, + math library built into NuttX. This math library comes from the Rhombus OS and + was written by Nick Johnson. The Rhombus OS math library port was contributed by + Darcy Gong. config NOPRINTF_FIELDWIDTH bool "Disable sprintf support fieldwidth" |