Misa ff611a56ff CMake: Scope C99/C++98 flags to VVVVVV only ...

Due to a confluence of weird factors, it turns out that PhysFS is
compiling with implicit function definitions due to function definitions
that get hidden with -std=c99, but not with -std=gnu99 (or the default
GCC value of -std=gnu17).

Also, due to a recent GCC update (GCC 14), implicit function
declarations are actually prohibited with -std=c99 as the C99 standard
proscribes.

This meant that people started getting build errors in PhysFS code on
default settings, which wasn't ideal.

To fix this, we will make our -std= flags apply only to VVVVVV source
files. In CMake 2.8.12, this can be done with
set_source_files_properties. Additionally the flags to disable
exceptions and RTTI are scoped down too.

Thanks to leo60228 for helping debug and solve this issue.

Fixes #1167.

2024-07-12 21:33:47 -07:00

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