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libc: Added Kconfig choice to select C library

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Added Kconfig choice to select C library implementation

Signed-off-by: Jan Van Winkel <jan.van_winkel@dxplore.eu>
This commit is contained in:
Jan Van Winkel 2019-08-15 20:39:20 +02:00 • committed by Kumar Gala
commit c1f865b412
2 changed files with 45 additions and 19 deletions
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2
lib/CMakeLists.txt
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@ -1,6 +1,6 @@
# SPDX-License-Identifier: Apache-2.0
if(NOT CONFIG_NATIVE_APPLICATION)
if(NOT CONFIG_EXTERNAL_LIBC)
add_subdirectory(libc)
add_subdirectory(posix)
endif()

62
lib/libc/Kconfig
View file

@ -7,18 +7,44 @@
#
menu "C Library"
depends on !NATIVE_APPLICATION
config REQUIRES_FULL_LIBC
bool
help
Helper symbol to indicate some feature requires a C library implementation
with more functionality than what MINIMAL_LIBC provides
choice LIBC_IMPLEMENTATION
prompt "C Library Implementation"
default EXTERNAL_LIBC if NATIVE_APPLICATION
default NEWLIB_LIBC if REQUIRES_FULL_LIBC
default MINIMAL_LIBC
config MINIMAL_LIBC
bool "Minimal C library"
depends on !NATIVE_APPLICATION
help
Build with minimal C library.
config NEWLIB_LIBC
bool "Build with newlib c library"
bool "Newlib C library"
depends on !NATIVE_APPLICATION
help
Build with newlib library. The newlib library is expected to be
part of the SDK in this case.
config EXTERNAL_LIBC
bool "External C library"
help
Build with external/user provided C library.
endchoice #LIBC_IMPLEMENTATION
if NEWLIB_LIBC
if "$(ZEPHYR_TOOLCHAIN_VARIANT)" = "gnuarmemb"
config NEWLIB_LIBC_NANO
bool "Build with newlib-nano c library"
depends on NEWLIB_LIBC
bool "Build with newlib-nano C library"
default y
help
Build with newlib-nano library, for small embedded apps.
@ -29,7 +55,6 @@ endif
config NEWLIB_LIBC_ALIGNED_HEAP_SIZE
int "Newlib aligned heap size"
depends on MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT
depends on NEWLIB_LIBC
depends on USERSPACE
default 0
help
@ -43,32 +68,22 @@ config NEWLIB_LIBC_ALIGNED_HEAP_SIZE
config NEWLIB_LIBC_FLOAT_PRINTF
bool "Build with newlib float printf"
depends on NEWLIB_LIBC
help
Build with floating point printf enabled. This will increase the size of
the image.
config NEWLIB_LIBC_FLOAT_SCANF
bool "Build with newlib float scanf"
depends on NEWLIB_LIBC
help
Build with floating point scanf enabled. This will increase the size of
the image.
config STDOUT_CONSOLE
bool "Send stdout to console"
depends on CONSOLE_HAS_DRIVER
default y
help
This option directs standard output (e.g. printf) to the console
device, rather than suppressing it entirely. See also EARLY_CONSOLE
option.
endif #NEWLIB_LIBC
# Minimal libc options
if MINIMAL_LIBC
config MINIMAL_LIBC_MALLOC_ARENA_SIZE
int "Size of the minimal libc malloc arena"
depends on !NEWLIB_LIBC
default 0
help
Indicate the size of the memory arena used for minimal libc's
@ -77,10 +92,21 @@ config MINIMAL_LIBC_MALLOC_ARENA_SIZE
config MINIMAL_LIBC_LL_PRINTF
bool "Build with minimal libc long long printf" if !64BIT
depends on !NEWLIB_LIBC
default y if 64BIT
help
Build with long long printf enabled. This will increase the size of
the image.
endif #MINIMAL_LIBC
config STDOUT_CONSOLE
bool "Send stdout to console"
depends on CONSOLE_HAS_DRIVER
depends on !NATIVE_APPLICATION
default y
help
This option directs standard output (e.g. printf) to the console
device, rather than suppressing it entirely. See also EARLY_CONSOLE
option.
endmenu