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:

  [/builddir/build/BUILD/mumble-1.4.287-build/mumble-1.4.287.src/overlay_gl/overlay.c:40:23: error: ‘bool’ cannot be defined via ‘typedef’
   40 | typedef unsigned char bool;
      |                       ^~~~
/builddir/build/BUILD/mumble-1.4.287-build/mumble-1.4.287.src/overlay_gl/overlay.c:40:23: note: ‘bool’ is a keyword with ‘-std=c23’ onwards
/builddir/build/BUILD/mumble-1.4.287-build/mumble-1.4.287.src/overlay_gl/overlay.c:40:1: warning: useless type name in empty declaration
   40 | typedef unsigned char bool;
      | ^~~~~~~]: [This is where the build failed.  It says that you cannot use an identifier named "bool".]

Issue: This build used GCC 15, which defaults to the C23 language standard.

https://gcc.gnu.org/gcc-15/changes.html#c

C23 added "bool" as a keyword.  This source code is incompatible with C23 because it uses "bool" as an identifier.
Resolution: Patch the source code to no longer use "bool" as an identifier.  The GCC project has a guide for porting code to GCC 15 with helpful tips, such as using the stdbool.h header.

https://gcc.gnu.org/gcc-15/porting_to.html#c23-new-keywords