ggml : do not use _GNU_SOURCE gratuitously

Author: ggerganov

Makefile

@@ -49,6 +49,14 @@ CFLAGS   = -I.              $(OPT) -std=c11   -fPIC
 CXXFLAGS = -I. -I./examples $(OPT) -std=c++11 -fPIC
 LDFLAGS  =
 
+# clock_gettime came in POSIX.1b (1993)
+# CLOCK_MONOTONIC came in POSIX.1-2001 / SUSv3 as optional
+# posix_memalign came in POSIX.1-2001 / SUSv3
+# M_PI is an XSI extension since POSIX.1-2001 / SUSv3, came in XPG1 (1985)
+# ref: https://github.com/ggerganov/whisper.cpp/pull/1027
+CFLAGS   += -D_XOPEN_SOURCE=600
+CXXFLAGS += -D_XOPEN_SOURCE=600
+
 ifdef LLAMA_DEBUG
 	CFLAGS   += -O0 -g
 	CXXFLAGS += -O0 -g

ggml.c

@@ -1,4 +1,3 @@
-#define _GNU_SOURCE // Defines CLOCK_MONOTONIC on Linux
 #define _CRT_SECURE_NO_DEPRECATE // Disables ridiculous "unsafe" warnigns on Windows
 
 #include "ggml.h"
@@ -13387,8 +13386,7 @@ static void ggml_compute_forward_conv_2d_sk_p0_f16_f32(
     const int nk1 = ne01;
 
     // size of the convolution row - the kernel size unrolled across all channels
-    // round-up so it is more suitable for SIMD
-    const int ew0 = ggml_up32(nk0*nk1*ne02);
+    const int ew0 = nk0*nk1*ne02;
 
     GGML_ASSERT(nb00 == sizeof(ggml_fp16_t));
     GGML_ASSERT(nb10 == sizeof(float));