Revert "ggml : do not use _GNU_SOURCE gratuitously (#1027)"

This reverts commit 3f7a03ebe3.

Makefile

@@ -36,12 +36,11 @@ CFLAGS   = -I.              -O3 -DNDEBUG -std=c11   -fPIC
 CXXFLAGS = -I. -I./examples -O3 -DNDEBUG -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)
-CFLAGS   += -D_XOPEN_SOURCE=600
-CXXFLAGS += -D_XOPEN_SOURCE=600
+# ref: https://github.com/ggerganov/whisper.cpp/issues/37
+ifneq ($(wildcard /usr/include/musl/*),)
+	CFLAGS += -D_POSIX_SOURCE -D_GNU_SOURCE
+	CXXFLAGS += -D_POSIX_SOURCE -D_GNU_SOURCE
+endif
 
 # RLIMIT_MEMLOCK came in BSD, is not specified in POSIX.1,
 # and on macOS its availability depends on enabling Darwin extensions

examples/command/command.cpp

@@ -6,8 +6,8 @@
 // ref: https://github.com/ggerganov/whisper.cpp/issues/171
 //
 
-#include "common-sdl.h"
 #include "common.h"
+#include "common-sdl.h"
 #include "whisper.h"
 
 #include <sstream>

examples/stream/stream.cpp

@@ -3,8 +3,8 @@
 // A very quick-n-dirty implementation serving mainly as a proof of concept.
 //
 
-#include "common-sdl.h"
 #include "common.h"
+#include "common-sdl.h"
 #include "whisper.h"
 
 #include <cassert>

examples/talk-llama/llama.cpp

@@ -1,3 +1,11 @@
+// Defines fileno on msys:
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#include <cstddef>
+#include <cstdint>
+#include <cstdio>
+#endif
+
 #include "llama-util.h"
 #include "llama.h"
 

examples/talk-llama/talk-llama.cpp

@@ -1,8 +1,8 @@
 // Talk with AI
 //
 
-#include "common-sdl.h"
 #include "common.h"
+#include "common-sdl.h"
 #include "whisper.h"
 #include "llama.h"
 

examples/talk/talk.cpp

@@ -1,8 +1,8 @@
 // Talk with AI
 //
 
-#include "common-sdl.h"
 #include "common.h"
+#include "common-sdl.h"
 #include "whisper.h"
 #include "gpt-2.h"
 

ggml.c

@@ -1,3 +1,4 @@
+#define _GNU_SOURCE // Defines CLOCK_MONOTONIC on Linux
 #define _CRT_SECURE_NO_DEPRECATE // Disables ridiculous "unsafe" warnigns on Windows
 
 #include "ggml.h"