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Bug 4103

Summary: SDL_cpuinfo.h provokes warnings with -Wundef on non-x86 hosts
Product: SDL Reporter: Felix Geyer <debfx>
Component: *don't know*Assignee: Sam Lantinga <slouken>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2    
Version: HG 2.0   
Hardware: Other   
OS: Linux   

Description Felix Geyer 2018-03-05 19:35:13 UTC 
Forwarding from https://bugs.debian.org/892087 quoting verbatim:

The SDL2 header SDL_cpuinfo.h generates gcc warnings if the program using
it compiles with the -Wundef warning. (In particular, this means that QEMU
builds using it fail on at least sparc hosts, since QEMU dev builds
use both -Wundef and -Werror.).

/usr/include/SDL2/SDL_cpuinfo.h:63:5: warning: "HAVE_IMMINTRIN_H" is not defined, evaluates to 0 [-Wundef]
 #if HAVE_IMMINTRIN_H && !defined(SDL_DISABLE_IMMINTRIN_H)

This probably only causes problems on non-x86 hosts, because on x86
hosts SDL_config.h will do "#define HAVE_IMMINTRIN_H 1".

It would be nice if the headers could be compiled cleanly with this
warning flag enabled.

thanks
-- PMM
Comment 1 Sam Lantinga 2018-03-11 05:20:51 UTC 
Fixed, thanks!
https://hg.libsdl.org/SDL/rev/a358a111ff69