Given following log snippets, their explanation, and nothing else, explain what failure, if any, occurred during build of this package.

  Snippets are in a format of [X] : [Y], where [X] is a log snippet, and [Y] is the explanation.

  Snippets are delimited with '================'.

  Drawing on information from all snippets, provide a concise explanation of the issue and recommend a solution.

  Explanation of the issue, and recommended solution, should take a handful of sentences.

  Snippets:

  [sdl.c:717:16: error: implicit declaration of function âfabsfâ [-Wimplicit-function-declaration]
  717 |     float d0 = fabsf(fasp - asp);
      |                ^~~~~]: [This is compiler error. Function was used without previous declaration. This is not allowed in many compiled languages, like C. ]
=============
[sdl.c:57:1: note: include â<math.h>â or provide a declaration of âfabsfâ
   56 | #include "sdl.h"
  +++ |+#include <math.h>
   57 | ]: [This is compiler note. Header file `math.h` should be included in the `sdl.c` file.]
=============
[sdl.c:717:16: warning: incompatible implicit declaration of built-in function âfabsfâ [-Wbuiltin-declaration-mismatch]
  717 |     float d0 = fabsf(fasp - asp);
      |                ^~~~~]: [This is compiler warning. Function `fabsf` which is normally builtin, was implicitly declared in the file `sdl.c`. This is not allowed in C programming language.]
=============
[make: *** [Makefile:26: default] Error 2]: [Make process has failed with an error.]

Issue: Build of the package failed due to issues with source. These were detected by the compiler in file `sdl.c`.
Resolution: Ensure that all functions are properly declared before usage, and that all needed header files are imported before compiling code and building the package.