Don't compile AVX2 functions when building without AVX2 support

Author: turboderp

exllamav2/exllamav2_ext/cpp/sampling_avx2.cpp

@@ -9,9 +9,12 @@
 #include <chrono>
 #include <map>
 #include "avx2_target.h"
-#include "avx_mathfun.h"
 #include "profiling.h"
 
+#ifdef USE_AVX2
+    #include "avx_mathfun.h"
+#endif
+
 AVX2_TARGET
 int softmax_cpu_avx2
 (
@@ -23,6 +26,10 @@ int softmax_cpu_avx2
     float* output
 )
 {
+    #ifndef USE_AVX2
+    return 0;
+    #else
+
     profile_start("softmax_cpu (AVX2)");
 
     int vocab_size_aligned = ((vocab_size + 31) / 32) * 32;
@@ -141,4 +148,5 @@ int softmax_cpu_avx2
 //    }
 //    printf("sum: %f\n\n", summ);
     return maxi;
+    #endif
 }