Avoid compiling different sources for different targets

Simplifies configuration and fixes a potential problem with inline functions.
Inline functions that fail to inline will have a callable body generated. If
such a body is generated with the SSE4 source, for example, it can generate
SSE4 instructions. Calls for that function in other sources can then end up
calling the SSE4-generated body outside of any CPU capability check.

1 files changed, 5 insertions, 0 deletions

diff --git a/core/mixer/mixer_sse.cpp b/core/mixer/mixer_sse.cpp
index ff722c19..f21ec227 100644
--- a/core/mixer/mixer_sse.cpp
+++ b/core/mixer/mixer_sse.cpp
@@ -15,6 +15,11 @@ struct BSincTag;
 struct FastBSincTag;
 
 
+/* SSE2 is required for any SSE support. */
+#if defined(__GNUC__) && !defined(__clang__) && !defined(__SSE2__)
+#pragma GCC target("sse2")
+#endif
+
 namespace {
 
 constexpr uint FracPhaseBitDiff{MixerFracBits - BSincPhaseBits};