espressif/ESP8266_RTOS_SDK
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ESP8266_RTOS_SDK/components/newlib
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Trygve Laugstøl f82e9be787 fix: Fixing lots of compilation warnings 
- fix(esp8266):
  - Adding includes for missing symbols.
  - Removing unused variables.
  - Skip unsupported packing pragmas.
  - Add rom_functions.h for symbols that come from the ESP ROM. Add attributes on
ets_printf so GCC will check the syntax of the formatting string and types of
the arguments.
  - Add ETS_GPIO_INTR_EN(DIS)ABLE macro.
  - Use gpio_output_conf instead of gpio_output_set.

- fix(freertos):
  - Define functions that are useful.
  - Use correct printf symbols when printing.

- fix(lwip):
  - Ignore the warning in sntp.

- fix(mqtt):
  - `xTicksToWait` is unsigned, can't check for less than zero. Remove
unused variables.

- fix(newlib):
  - `_free_r()` returns `void`, not `void *`.
  - Adding includes for missing symbols.

- fix(ssl):
  - Make sure functions always return a value.

Merges https://github.com/espressif/ESP8266_RTOS_SDK/pull/188
2018-05-23 14:52:26 +08:00
..
newlib
fix: Fixing lots of compilation warnings
2018-05-23 14:52:26 +08:00
component.mk
feat(newlib): Add newlib platform function
2018-05-14 14:30:42 +08:00
Kconfig
feat(kconfig): Add option to kconfig
2018-05-11 14:26:57 +08:00
README.md
doc(newlib): Add doc for newlib
2018-05-18 16:55:50 +08:00

README.md

The newlib version has been updated to "2.2.0" and supply two version C libraries to user. One is "libc.a" which functions have more features base on stand C, another is "libc_nano.c" which functions have less function.

You can choose the one you needed by menuconfig:

Component config --->
        newlib --- >
                newlib level(XXXX)
                        ( ) normal
                        ( ) nano

The normal "libc" has position argument, "long long" type data and float data transformation at function printf/scanf and so on. So it should cost more stack and heap, the test data as following:
Object Origin newlib New newlib New newlib nano
Start heap/byte 53000 Start heap/byte 49184 Start heap/byte 51824
Fucntion Stack/byte Heap/byte Heap cost/byte Stack/byte Heap/byte Heap cost/byte Stack/byte Heap/byte Heap cost/byte
isalnum 96 53000 0 80 49184 0 80 51824 0
isalpha 80 53000 0 64 49184 0 64 51824 0
isspace 80 53000 0 64 49184 0 64 51824 0
atoi 160 53000 0 144 49184 0 144 51824 0
strtol 144 53000 0 128 49184 0 128 51824 0
atof 224 53000 0 208 49184 0 208 51824 0
atoff 224 53000 0 208 49184 0 208 51824 0
strtod 208 53000 0 192 49184 0 192 51824 0
strtof 208 53000 0 192 49184 0 192 51824 0
asprintf 880 52616 384 1200 48800 384 608 51632 192
sscanf 1552 53000 0 2032 49184 0 1120 51824 0
gmtime 944 52616 384 1040 48576 608 1296 51512 312
localtime 160 53000 0 288 49184 0 288 51824 0
mktime 320 53000 0 448 49184 0 448 51824 0
asctime 768 52488 480 1264 48528 656 752 51464 360
settimeofday 336 53000 0 320 49184 0 320 51824 0
gettimeofday 480 53000 0 464 49184 0 464 51824 0
localtime_r 304 53000 0 432 49184 0 432 51824 0
asprintf（64bit） 752 52424 576 1136 48336 848 608 51272 552
sscanf（64bit） 1056 53000 0 1376 49184 0 1040 51824 0