Based on https://discuss.pixls.us/t/a-tone-equalizer-in-darktable/10678/87

Fixes:

  error: the call requires 'ifunc', which is not supported by this target

diff --git a/src/common/darktable.h b/src/common/darktable.h
index 3267cfe..c42015a 100644
--- a/src/common/darktable.h
+++ b/src/common/darktable.h
@@ -123,17 +123,7 @@ typedef unsigned int u_int;
 
 #endif /* _OPENMP */
 
-/* Create cloned functions for various CPU SSE generations */
-/* See for instructions https://hannes.hauswedell.net/post/2017/12/09/fmv/ */
-/* TL;DR : use only on SIMD functions containing low-level paralellized/vectorized loops */
-#if __has_attribute(target_clones) && !defined(_WIN32) && (defined(__amd64__) || defined(__amd64) || defined(__x86_64__) || defined(__x86_64))
-#define __DT_CLONE_TARGETS__ __attribute__((target_clones("default", "sse2", "sse3", "sse4.1", "sse4.2", "popcnt", "avx", "avx2", "avx512f", "fma4")))
-#elif __has_attribute(target_clones) && !defined(_WIN32) && defined(__PPC64__)
-/* __PPC64__ is the only macro tested for in is_supported_platform.h, other macros would fail there anyway. */
-#define __DT_CLONE_TARGETS__ __attribute__((target_clones("default","cpu=power9")))
-#else
 #define __DT_CLONE_TARGETS__
-#endif
 
 /* Helper to force heap vectors to be aligned on 64 bits blocks to enable AVX2 */
 #define DT_ALIGNED_ARRAY __attribute__((aligned(64)))