diff --git a/deps/zlib/adler32_simd.c b/deps/zlib/adler32_simd.c
index d79b3886a230a1..58966eecf0b800 100644
--- a/deps/zlib/adler32_simd.c
+++ b/deps/zlib/adler32_simd.c
@@ -50,13 +50,9 @@
 #define NMAX 5552
 
 #if defined(ADLER32_SIMD_SSSE3)
-#ifndef __GNUC__
-#define __attribute__()
-#endif
 
 #include <tmmintrin.h>
 
-__attribute__((target("ssse3")))
 uint32_t ZLIB_INTERNAL adler32_simd_(  /* SSSE3 */
     uint32_t adler,
     const unsigned char *buf,
diff --git a/deps/zlib/crc32_simd.c b/deps/zlib/crc32_simd.c
index 1181e0f9f2c07d..d80beba39c0397 100644
--- a/deps/zlib/crc32_simd.c
+++ b/deps/zlib/crc32_simd.c
@@ -8,9 +8,6 @@
 #include "crc32_simd.h"
 
 #if defined(CRC32_SIMD_SSE42_PCLMUL)
-#ifndef __GNUC__
-#define __attribute__()
-#endif
 
 /*
  * crc32_sse42_simd_(): compute the crc32 of the buffer, where the buffer
@@ -24,7 +21,6 @@
 #include <smmintrin.h>
 #include <wmmintrin.h>
 
-__attribute__((target("sse4.2,pclmul")))
 uint32_t ZLIB_INTERNAL crc32_sse42_simd_(  /* SSE4.2+PCLMUL */
     const unsigned char *buf,
     z_size_t len,
diff --git a/deps/zlib/crc_folding.c b/deps/zlib/crc_folding.c
index 4e9c6e78529f7e..ee31d4918d6413 100644
--- a/deps/zlib/crc_folding.c
+++ b/deps/zlib/crc_folding.c
@@ -25,10 +25,6 @@
 #include <immintrin.h>
 #include <wmmintrin.h>
 
-#ifndef __GNUC__
-#define __attribute__()
-#endif
-
 #define CRC_LOAD(s) \
     do { \
         __m128i xmm_crc0 = _mm_loadu_si128((__m128i *)s->crc0 + 0);\
@@ -45,7 +41,6 @@
         _mm_storeu_si128((__m128i *)s->crc0 + 4, xmm_crc_part);\
     } while (0);
 
-__attribute__((target("sse4.2,pclmul")))
 ZLIB_INTERNAL void crc_fold_init(deflate_state *const s)
 {
     CRC_LOAD(s)
@@ -60,7 +55,6 @@ ZLIB_INTERNAL void crc_fold_init(deflate_state *const s)
     s->strm->adler = 0;
 }
 
-__attribute__((target("sse4.2,pclmul")))
 local void fold_1(deflate_state *const s,
         __m128i *xmm_crc0, __m128i *xmm_crc1,
         __m128i *xmm_crc2, __m128i *xmm_crc3)
@@ -87,7 +81,6 @@ local void fold_1(deflate_state *const s,
     *xmm_crc3 = _mm_castps_si128(ps_res);
 }
 
-__attribute__((target("sse4.2,pclmul")))
 local void fold_2(deflate_state *const s,
         __m128i *xmm_crc0, __m128i *xmm_crc1,
         __m128i *xmm_crc2, __m128i *xmm_crc3)
@@ -122,7 +115,6 @@ local void fold_2(deflate_state *const s,
     *xmm_crc3 = _mm_castps_si128(ps_res31);
 }
 
-__attribute__((target("sse4.2,pclmul")))
 local void fold_3(deflate_state *const s,
         __m128i *xmm_crc0, __m128i *xmm_crc1,
         __m128i *xmm_crc2, __m128i *xmm_crc3)
@@ -163,7 +155,6 @@ local void fold_3(deflate_state *const s,
     *xmm_crc3 = _mm_castps_si128(ps_res32);
 }
 
-__attribute__((target("sse4.2,pclmul")))
 local void fold_4(deflate_state *const s,
         __m128i *xmm_crc0, __m128i *xmm_crc1,
         __m128i *xmm_crc2, __m128i *xmm_crc3)
@@ -230,7 +221,6 @@ local const unsigned zalign(32) pshufb_shf_table[60] = {
 	0x0201008f,0x06050403,0x0a090807,0x0e0d0c0b  /* shl  1 (16 -15)/shr15*/
 };
 
-__attribute__((target("sse4.2,pclmul")))
 local void partial_fold(deflate_state *const s, const size_t len,
         __m128i *xmm_crc0, __m128i *xmm_crc1,
         __m128i *xmm_crc2, __m128i *xmm_crc3,
@@ -281,7 +271,6 @@ local void partial_fold(deflate_state *const s, const size_t len,
     *xmm_crc3 = _mm_castps_si128(ps_res);
 }
 
-__attribute__((target("sse4.2,pclmul")))
 ZLIB_INTERNAL void crc_fold_copy(deflate_state *const s,
         unsigned char *dst, const unsigned char *src, long len)
 {
@@ -438,7 +427,6 @@ local const unsigned zalign(16) crc_mask2[4] = {
     0x00000000, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF
 };
 
-__attribute__((target("sse4.2,pclmul")))
 unsigned ZLIB_INTERNAL crc_fold_512to32(deflate_state *const s)
 {
     const __m128i xmm_mask  = _mm_load_si128((__m128i *)crc_mask);