PKG: optimize libretro-mednafen-wswan (#153)

- optimize `mednafen_wswan_libretro` core code
- add PGO data (uclibc)

package/miyoo/retroarch/libretro-mednafen-wswan/0001-Makefile-optimize-pgo-flags.patch

@@ -0,0 +1,55 @@
+From 9872ea07fab71eddfdd52df1840dff0ef5dba36d Mon Sep 17 00:00:00 2001
+From: Apaczer <94932128+Apaczer@users.noreply.github.com>
+Date: Sun, 16 Feb 2025 21:00:26 +0100
+Subject: [PATCH 1/2] Makefile: optimize & pgo flags
+
+---
+ Makefile | 17 ++++++++++++++---
+ 1 file changed, 14 insertions(+), 3 deletions(-)
+
+diff --git a/Makefile b/Makefile
+index 851dd5b..b2e06c6 100644
+--- a/Makefile
++++ b/Makefile
+@@ -12,6 +12,8 @@ filter_out2 = $(call filter_out1,$(call filter_out1,$1))
+ unixpath = $(subst \,/,$1)
+ unixcygpath = /$(subst :,,$(call unixpath,$1))
+ 
++PROFILE ?= 0
++
+ # system platform
+ ifeq ($(platform),)
+    platform = unix
+@@ -325,9 +327,18 @@ else ifeq ($(platform), miyoo)
+    CC = /opt/miyoo/usr/bin/arm-linux-gcc
+    CXX = /opt/miyoo/usr/bin/arm-linux-g++
+    AR = /opt/miyoo/usr/bin/arm-linux-ar
+-   fpic := -fPIC
++   fpic := -fno-PIC
+    SHARED := -shared -Wl,--no-undefined -Wl,--version-script=link.T
+-   FLAGS += -fomit-frame-pointer -ffast-math -march=armv5te -mtune=arm926ej-s
++   FLAGS += -fomit-frame-pointer -ffast-math -march=armv5te -mtune=arm926ej-s \
++            -fdata-sections -ffunction-sections -Wl,--gc-sections \
++            -fno-stack-protector -fno-ident -fomit-frame-pointer \
++            -fno-unroll-loops
++ifeq ($(PROFILE), YES)
++   FLAGS += -fprofile-generate=/mnt/profile # rm path if you want dir structure intact at runtime
++   LDFLAGS += -lgcov
++else ifeq ($(PROFILE), APPLY)
++   FLAGS += -fprofile-use -fbranch-probabilities -Wno-error=coverage-mismatch
++endif
+ 
+ # Windows MSVC 2017 all architectures
+ else ifneq (,$(findstring windows_msvc2017,$(platform)))
+@@ -562,7 +573,7 @@ all: $(TARGET)
+ ifeq ($(DEBUG),1)
+    FLAGS += -O0 -g
+ else
+-   FLAGS += -O2 -DNDEBUG $(EXTRA_GCC_FLAGS)
++   FLAGS += -Ofast -DNDEBUG $(EXTRA_GCC_FLAGS)
+ endif
+ 
+ ifneq (,$(findstring msvc,$(platform)))
+-- 
+2.45.2.windows.1
+

package/miyoo/retroarch/libretro-mednafen-wswan/0002-lr_core_options-finetune-frameskip-samprate.patch

@@ -0,0 +1,53 @@
+From eaece46af09d9a79466d0dd2f9450356e9c84057 Mon Sep 17 00:00:00 2001
+From: Apaczer <94932128+Apaczer@users.noreply.github.com>
+Date: Sun, 16 Feb 2025 23:11:50 +0100
+Subject: [PATCH 2/2] lr_core_options: finetune frameskip & samprate
+
+disable 60Hz mode
+---
+ libretro_core_options.h | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/libretro_core_options.h b/libretro_core_options.h
+index 462ff2c..22cb9f4 100644
+--- a/libretro_core_options.h
++++ b/libretro_core_options.h
+@@ -151,7 +151,7 @@ struct retro_core_option_v2_definition option_defs_us[] = {
+          { "manual",   "Manual" },
+          { NULL, NULL },
+       },
+-      "disabled"
++      "manual"
+    },
+    {
+       "wswan_frameskip_threshold",
+@@ -179,7 +179,7 @@ struct retro_core_option_v2_definition option_defs_us[] = {
+          { "60", NULL },
+          { NULL, NULL },
+       },
+-      "33"
++      "60"
+    },
+    {
+       "wswan_60hz_mode",
+@@ -193,7 +193,7 @@ struct retro_core_option_v2_definition option_defs_us[] = {
+          { "enabled",  NULL },
+          { NULL, NULL },
+       },
+-      "enabled",
++      "disabled",
+    },
+    {
+       "wswan_sound_sample_rate",
+@@ -209,7 +209,7 @@ struct retro_core_option_v2_definition option_defs_us[] = {
+          { "48000",  NULL },
+          { NULL, NULL },
+       },
+-      "44100",
++      "11025",
+    },
+    {
+       "wswan_sound_low_pass",
+-- 
+2.45.2.windows.1
+

package/miyoo/retroarch/libretro-mednafen-wswan/libretro-mednafen-wswan.mk

@@ -8,12 +8,20 @@ LIBRETRO_MEDNAFEN_WSWAN_VERSION = 32bf70a3032a138baa969c22445f4b7821632c30
 LIBRETRO_MEDNAFEN_WSWAN_SITE = $(call github,libretro,beetle-wswan-libretro,$(LIBRETRO_MEDNAFEN_WSWAN_VERSION))
 LIBRETRO_MEDNAFEN_WSWAN_LICENSE = GPL-2.0
 LIBRETRO_MEDNAFEN_WSWAN_LICENSE_FILES = COPYING
+# Optimize build with Profile Guided Optimization (values: 0, YES, APPLY)
+LIBRETRO_MEDNAFEN_WSWAN_PGO ?= APPLY
+
+ifeq ($(LIBRETRO_MEDNAFEN_WSWAN_PGO), APPLY)
+define LIBRETRO_MEDNAFEN_WSWAN_CONFIGURE_CMDS
+	cp -r $(BASE_DIR)/../board/miyoo/profile/libretro-mednafen-wswan/* $(@D)/
+endef
+endif
 
 define LIBRETRO_MEDNAFEN_WSWAN_BUILD_CMDS
 	CFLAGS="$(TARGET_CFLAGS) $(COMPILER_COMMONS_CFLAGS_SO)" \
 		CXXFLAGS="$(TARGET_CXXFLAGS) $(COMPILER_COMMONS_CXXFLAGS_SO)" \
 		LDFLAGS="$(TARGET_LDFLAGS) $(COMPILER_COMMONS_LDFLAGS_SO)" \
-		$(MAKE) CXX="$(TARGET_CXX)" CC="$(TARGET_CC)" -C $(@D)/ platform="$(RETROARCH_LIBRETRO_PLATFORM)"
+		$(MAKE) PROFILE="$(LIBRETRO_MEDNAFEN_WSWAN_PGO)" CXX="$(TARGET_CXX)" CC="$(TARGET_CC)" -C $(@D)/ platform="$(RETROARCH_LIBRETRO_PLATFORM)"
 		$(TARGET_STRIP) --strip-unneeded $(@D)/*_libretro.so
 endef