Fix undefined symbol error in libretro Nintendo 3DS build

Author: white-axe

meson.build

@@ -305,6 +305,11 @@ if is_libretro
         libretro_defines += '-DFLAC__INTEGER_ONLY_LIBRARY'
     endif
 
+    if is_devkitarm
+        libretro_defines += '-D__DEVKITPRO__'
+        libretro_defines += '-D__DEVKITARM__'
+    endif
+
     # Position-independent code is not supported on some platforms where we need to build a static library, e.g. https://github.com/vitasdk/vita-toolchain/issues/264
     use_pic = not core_is_static
 

subprojects/packagefiles/openal-soft-int32.patch

@@ -1,6 +1,35 @@
-# Fixes a compilation error when using the devkitARM toolchain or Vita SDK toolchain to compile OpenAL Soft.
+# Fixes compilation errors when using the devkitARM toolchain toolchain to compile OpenAL Soft.
 # For some reason, there's no implicit casting between `int` and `int32_t` and between `unsigned int` and `uint32_t` in devkitARM or Vita SDK even though they're the same size, so we have to do this whole song and dance to appease the compiler.
 
+--- a/alc/alu.cpp
++++ b/alc/alu.cpp
+@@ -2114,7 +2114,7 @@ inline T SampleConv(float) noexcept;
+ 
+ template<> inline float SampleConv(float val) noexcept
+ { return val; }
+-template<> inline int32_t SampleConv(float val) noexcept
++template<> inline int SampleConv(float val) noexcept
+ {
+     /* Floats have a 23-bit mantissa, plus an implied 1 bit and a sign bit.
+      * This means a normalized float has at most 25 bits of signed precision.
+@@ -2123,13 +2123,16 @@ template<> inline int32_t SampleConv(float val) noexcept
+      */
+     return fastf2i(std::clamp(val*2147483648.0f, -2147483648.0f, 2147483520.0f));
+ }
++#ifdef __DEVKITARM__
++template<> inline long SampleConv(float val) noexcept { return (long)SampleConv<int>(val); }
++#endif
+ template<> inline int16_t SampleConv(float val) noexcept
+ { return static_cast<int16_t>(fastf2i(std::clamp(val*32768.0f, -32768.0f, 32767.0f))); }
+ template<> inline int8_t SampleConv(float val) noexcept
+ { return static_cast<int8_t>(fastf2i(std::clamp(val*128.0f, -128.0f, 127.0f))); }
+ 
+ /* Define unsigned output variations. */
+-template<> inline uint32_t SampleConv(float val) noexcept
++template<> inline unsigned int SampleConv(float val) noexcept
+ { return static_cast<uint32_t>(SampleConv<int32_t>(val)) + 2147483648u; }
+ template<> inline uint16_t SampleConv(float val) noexcept
+ { return static_cast<uint16_t>(SampleConv<int16_t>(val) + 32768); }
 --- a/core/converter.cpp
 +++ b/core/converter.cpp
 @@ -83,16 +83,16 @@ inline DevFmtType_t<T> StoreSample(float) noexcept;