From 437498709be14f4ab39545d1d70ec61934aefa5f Mon Sep 17 00:00:00 2001
From: Anutosh Bhat <andersonbhat491@gmail.com>
Date: Sat, 21 Dec 2024 22:42:45 +0530
Subject: [PATCH] Add patch on llvm 19.1.6 to take care of temporary files
 generated at runtime (#1476)

* Add patch on llvm 19.1.6 to take care of temporary files generated at runtime

* changes as per Martin's Suggestion
---
 recipes/recipes_emscripten/llvm/build.sh          |  9 ++++-----
 .../shift_temporary_files_to_tmp_dir.patch        | 15 +++++++++++++++
 recipes/recipes_emscripten/llvm/recipe.yaml       |  3 ++-
 3 files changed, 21 insertions(+), 6 deletions(-)
 create mode 100644 recipes/recipes_emscripten/llvm/patches/shift_temporary_files_to_tmp_dir.patch

diff --git a/recipes/recipes_emscripten/llvm/build.sh b/recipes/recipes_emscripten/llvm/build.sh
index 8557f4d88..5faf9a24f 100644
--- a/recipes/recipes_emscripten/llvm/build.sh
+++ b/recipes/recipes_emscripten/llvm/build.sh
@@ -7,20 +7,19 @@ export CMAKE_SYSTEM_PREFIX_PATH=$PREFIX
 # clear LDFLAGS flags because they contain sWASM_BIGINT
 export LDFLAGS=""
 
-
 # Configure step
-cmake ${CMAKE_ARGS} -S ../llvm -B .                 \
+emcmake cmake ${CMAKE_ARGS} -S ../llvm -B .         \
     -DCMAKE_BUILD_TYPE=MinSizeRel                   \
     -DCMAKE_PREFIX_PATH=$PREFIX                     \
     -DCMAKE_INSTALL_PREFIX=$PREFIX                  \
     -DLLVM_HOST_TRIPLE=wasm32-unknown-emscripten    \
     -DLLVM_TARGETS_TO_BUILD="WebAssembly"           \
+    -DLLVM_ENABLE_ASSERTIONS=ON                     \
     -DLLVM_INCLUDE_BENCHMARKS=OFF                   \
     -DLLVM_INCLUDE_EXAMPLES=OFF                     \
     -DLLVM_INCLUDE_TESTS=OFF                        \
     -DLLVM_ENABLE_LIBEDIT=OFF                       \
     -DLLVM_ENABLE_PROJECTS="clang;lld"              \
-    -DCMAKE_VERBOSE_MAKEFILE=ON                     \
     -DLLVM_ENABLE_THREADS=OFF                       \
     -DLLVM_ENABLE_ZSTD=OFF                          \
     -DLLVM_ENABLE_LIBXML2=OFF                       \
@@ -30,10 +29,10 @@ cmake ${CMAKE_ARGS} -S ../llvm -B .                 \
     -DCMAKE_CXX_FLAGS="-Dwait4=__syscall_wait4"
 
 # Build step
-make -j4
+emmake make -j4
 
 # Install step
-make install
+emmake make install
 
 # Copy all files with ".wasm" extension to $PREFIX/bin
 cp $SRC_DIR/build/bin/*.wasm $PREFIX/bin
\ No newline at end of file
diff --git a/recipes/recipes_emscripten/llvm/patches/shift_temporary_files_to_tmp_dir.patch b/recipes/recipes_emscripten/llvm/patches/shift_temporary_files_to_tmp_dir.patch
new file mode 100644
index 000000000..32ac45c13
--- /dev/null
+++ b/recipes/recipes_emscripten/llvm/patches/shift_temporary_files_to_tmp_dir.patch
@@ -0,0 +1,15 @@
+diff --git a/clang/lib/Interpreter/Wasm.cpp b/clang/lib/Interpreter/Wasm.cpp
+index aa10b160ccf8..184867e2b55f 100644
+--- a/clang/lib/Interpreter/Wasm.cpp
++++ b/clang/lib/Interpreter/Wasm.cpp
+@@ -76,8 +76,8 @@ llvm::Error WasmIncrementalExecutor::addModule(PartialTranslationUnit &PTU) {
+   llvm::TargetMachine *TargetMachine = Target->createTargetMachine(
+       PTU.TheModule->getTargetTriple(), "", "", TO, llvm::Reloc::Model::PIC_);
+   PTU.TheModule->setDataLayout(TargetMachine->createDataLayout());
+-  std::string ObjectFileName = PTU.TheModule->getName().str() + ".o";
+-  std::string BinaryFileName = PTU.TheModule->getName().str() + ".wasm";
++  std::string ObjectFileName = "/tmp/" + PTU.TheModule->getName().str() + ".o";
++  std::string BinaryFileName = "/tmp/" + PTU.TheModule->getName().str() + ".wasm";
+ 
+   std::error_code Error;
+   llvm::raw_fd_ostream ObjectFileOutput(llvm::StringRef(ObjectFileName), Error);
diff --git a/recipes/recipes_emscripten/llvm/recipe.yaml b/recipes/recipes_emscripten/llvm/recipe.yaml
index 511a1631f..2e92fd7b8 100644
--- a/recipes/recipes_emscripten/llvm/recipe.yaml
+++ b/recipes/recipes_emscripten/llvm/recipe.yaml
@@ -11,9 +11,10 @@ source:
   sha256: f07fdcbb27b2b67aa95e5ddadf45406b33228481c250e65175066d36536a1ee2
   patches:
   - patches/cross_compile.patch
+  - patches/shift_temporary_files_to_tmp_dir.patch
 
 build:
-  number: 0
+  number: 1
 
 requirements:
   build: