Remove C++20 requirement (#257)

* Remove C++20 requirement

* Roll back C features not supported in VS2017

ggml.c

@@ -155,7 +155,8 @@ static inline float fp32_from_bits(uint32_t w) {
     union {
         uint32_t as_bits;
         float as_value;
-    } fp32 = { w };
+    } fp32;
+    fp32.as_bits = w;
     return fp32.as_value;
 }
 
@@ -163,7 +164,8 @@ static inline uint32_t fp32_to_bits(float f) {
 	union {
 		float as_value;
 		uint32_t as_bits;
-	} fp32 = { f };
+	} fp32;
+	fp32.as_value = f;
 	return fp32.as_bits;
 }
 

whisper.cpp

@@ -735,10 +735,9 @@ static bool whisper_model_load(const std::string & fname, whisper_context & wctx
 
     // create the ggml context
     {
-        struct ggml_init_params params = {
-            .mem_size   = wctx.buf_model->size(),
-            .mem_buffer = wctx.buf_model->data(),
-        };
+        struct ggml_init_params params;
+        params.mem_size   = wctx.buf_model->size();
+        params.mem_buffer = wctx.buf_model->data();
 
         model.ctx = ggml_init(params);
         if (!model.ctx) {
@@ -945,10 +944,9 @@ static bool whisper_model_load(const std::string & fname, whisper_context & wctx
 
     // create the ggml memory context
     {
-        struct ggml_init_params params = {
-            .mem_size   = wctx.buf_memory.size(),
-            .mem_buffer = wctx.buf_memory.data(),
-        };
+        struct ggml_init_params params;
+        params.mem_size   = wctx.buf_memory.size();
+        params.mem_buffer = wctx.buf_memory.data();
 
         model.ctx_mem = ggml_init(params);
         if (!model.ctx_mem) {
@@ -1097,10 +1095,9 @@ static bool whisper_encode(
     const int n_mels = hparams.n_mels;
     assert(mel_inp.n_mel == n_mels);
 
-    struct ggml_init_params params = {
-        .mem_size   = wctx.buf_compute.size(),
-        .mem_buffer = wctx.buf_compute.data(),
-    };
+    struct ggml_init_params params;
+    params.mem_size   = wctx.buf_compute.size();
+    params.mem_buffer = wctx.buf_compute.data();   
 
     struct ggml_context * ctx0 = ggml_init(params);
 
@@ -1175,10 +1172,9 @@ static bool whisper_encode(
 
         // create separate context for each layer to reduce memory usage
 
-        struct ggml_init_params paramsL = {
-            .mem_size   = wctx.buf_compute_layer.size(),
-            .mem_buffer = wctx.buf_compute_layer.data(),
-        };
+        struct ggml_init_params paramsL;
+        paramsL.mem_size   = wctx.buf_compute_layer.size();
+        paramsL.mem_buffer = wctx.buf_compute_layer.data();
 
         struct ggml_context * ctxL = ggml_init(paramsL);
 
@@ -1512,10 +1508,9 @@ static bool whisper_decode(
     const int N = n_tokens;
     const int M = wctx.exp_n_audio_ctx > 0 ? wctx.exp_n_audio_ctx : hparams.n_audio_ctx;
 
-    struct ggml_init_params params = {
-            .mem_size   = wctx.buf_compute.size(),
-            .mem_buffer = wctx.buf_compute.data(),
-        };
+    struct ggml_init_params params;
+    params.mem_size   = wctx.buf_compute.size();
+    params.mem_buffer = wctx.buf_compute.data();
 
     struct ggml_context * ctx0 = ggml_init(params);
 
@@ -1538,10 +1533,9 @@ static bool whisper_decode(
     for (int il = 0; il < n_layer; ++il) {
         const auto & layer = model.layers_decoder[il];
 
-        struct ggml_init_params paramsL = {
-            .mem_size   = wctx.buf_compute_layer.size(),
-            .mem_buffer = wctx.buf_compute_layer.data(),
-        };
+        struct ggml_init_params paramsL;
+        paramsL.mem_size   = wctx.buf_compute_layer.size();
+        paramsL.mem_buffer = wctx.buf_compute_layer.data();
 
         struct ggml_context * ctxL = ggml_init(paramsL);
         struct ggml_cgraph gf = {};
@@ -2915,10 +2909,9 @@ int whisper_full_parallel(
 
         // create the ggml memory context
         {
-            struct ggml_init_params params = {
-                .mem_size   = ctxs[i].buf_memory.size(),
-                .mem_buffer = ctxs[i].buf_memory.data(),
-            };
+            struct ggml_init_params params;
+            params.mem_size   = ctxs[i].buf_memory.size();
+            params.mem_buffer = ctxs[i].buf_memory.data();
 
             model.ctx_mem = ggml_init(params);
             if (!model.ctx_mem) {