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3.14 Library Routines

<pending: this is messy and incomplete - a little more information is at `http://sdcc.sourceforge.net/wiki/index.php/List_of_the_SDCC_library`>

Subsections

- 3.14.1 Compiler support routines (_gptrget, _mulint etc.)
- 3.14.2 Stdclib functions (puts, printf, strcat etc.)
  - 3.14.2.1 <stdio.h>
    - 3.14.2.1.1 getchar(), putchar()
    - 3.14.2.1.2 printf()
  - 3.14.2.2 <malloc.h>
- 3.14.3 Math functions (sinf, powf, sqrtf etc.)
  - 3.14.3.1 <math.h>
- 3.14.4 Other libraries