experimental/spirv-llvm-translator: New package

Does not work on big endian, despite faring slightly better with my patch.
Does not seem to work on 32-bit architectures; not investigated.

See-also: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/issues/2397

experimental/spirv-llvm-translator/APKBUILD

+# Maintainer: A. Wilcox <awilfox@adelielinux.org>
+pkgname=spirv-llvm-translator
+pkgver=18.1.6
+_llvmver=$(echo $pkgver | cut -f1 -d.)
+pkgrel=0
+pkgdesc="A tool and a library for bi-directional translation between SPIR-V and LLVM IR"
+url=" "
+arch="all"
+license="NCSA"
+depends=""
+makedepends="cmake llvm${_llvmver}-dev spirv-headers spirv-tools-dev"
+subpackages="$pkgname-dev"
+source="SPIRV-LLVM-Translator-$pkgver.tar.gz::https://github.com/KhronosGroup/SPIRV-LLVM-Translator/archive/refs/tags/v$pkgver.tar.gz
+	endian.patch
+	test-triplet.patch
+	"
+builddir="$srcdir/SPIRV-LLVM-Translator-$pkgver"
+
+build() {
+	if [ "$CBUILD" != "$CHOST" ]; then
+		CMAKE_CROSSOPTS="-DCMAKE_SYSTEM_NAME=Linux -DCMAKE_HOST_SYSTEM_NAME=Linux"
+	fi
+	cmake \
+		-DCMAKE_INSTALL_PREFIX=/usr \
+		-DCMAKE_INSTALL_LIBDIR=lib \
+		-DBUILD_SHARED_LIBS=True \
+		-DCCACHE_ALLOWED=OFF \
+		-DCMAKE_BUILD_TYPE=RelWithDebugInfo \
+		-DCMAKE_CXX_FLAGS="$CXXFLAGS" \
+		-DCMAKE_C_FLAGS="$CFLAGS" \
+		-DLLVM_DIR=$(/usr/lib/llvm${_llvmver}/bin/llvm-config --cmakedir) \
+		-DLLVM_EXTERNAL_LIT=/usr/bin/lit \
+		-DLLVM_EXTERNAL_SPIRV_HEADERS_SOURCE_DIR=/usr/include/spirv \
+		-DLLVM_SPIRV_INCLUDE_TESTS=ON \
+		${CMAKE_CROSSOPTS} \
+		-Bbuild .
+	make -C build
+}
+
+check() {
+	make -C build test
+}
+
+package() {
+	make DESTDIR="$pkgdir" -C build install
+}
+
+sha512sums="30d85fcd767cdae8b29f65dff50f2449e3421477634edcec67e88e92eeb77ec724c46eed4e90274d8697955c79fc26650c268839ed4612aee096b2d4707af728  SPIRV-LLVM-Translator-18.1.6.tar.gz
+fd261c9bb17c1f322191375ebbbbf14ebb8c6ec36d777470e48a5856d936c63f7a3306784460ee903b18f97b34f5157a2590bcfd3c891ebe03ce865f7d5ee9f7  endian.patch
+45d38dcf180113e2790b9a1fa3d1f7b24975b67e6976af71688bd6cbbd23e8e1cc792593f4612277bf6fee45e41a3047c62e3a69a218ee246f1494c9e1783665  test-triplet.patch"

experimental/spirv-llvm-translator/endian.patch

+--- SPIRV-LLVM-Translator-18.1.6/lib/SPIRV/libSPIRV/SPIRVStream.h.old	2024-10-30 05:39:48.000000000 -0500
++++ SPIRV-LLVM-Translator-18.1.6/lib/SPIRV/libSPIRV/SPIRVStream.h	2024-11-22 20:17:06.139226884 -0600
+@@ -43,6 +43,16 @@
+ #include "SPIRVDebug.h"
+ #include "SPIRVExtInst.h"
+ #include "SPIRVModule.h"
++#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
++#include <byteswap.h>
++#define cpu_to_le32(x) __bswap32(x)
++#define le32_to_cpu(x) __bswap32(x)
++#elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
++#define cpu_to_le32(x) x
++#define le32_to_cpu(x) x
++#else
++#error Endianness unknown (neither big nor little)
++#endif
+ #include <cctype>
+ #include <cstdint>
+ #include <iostream>
+@@ -102,7 +112,7 @@
+ const SPIRVDecoder &decodeBinary(const SPIRVDecoder &I, T &V) {
+   uint32_t W;
+   I.IS.read(reinterpret_cast<char *>(&W), sizeof(W));
+-  V = static_cast<T>(W);
++  V = static_cast<T>(le32_to_cpu(W));
+   SPIRVDBG(spvdbgs() << "Read word: W = " << W << " V = " << V << '\n');
+   return I;
+ }
+@@ -185,7 +195,7 @@
+     return O;
+   }
+ #endif
+-  uint32_t W = static_cast<uint32_t>(V);
++  uint32_t W = cpu_to_le32(static_cast<uint32_t>(V));
+   O.OS.write(reinterpret_cast<char *>(&W), sizeof(W));
+   return O;
+ }