New package: emscripten

packages/emscripten/build.sh

@@ -0,0 +1,83 @@
+TERMUX_PKG_HOMEPAGE=https://emscripten.org/
+TERMUX_PKG_DESCRIPTION="Emscripten: An LLVM-to-WebAssembly Compiler"
+TERMUX_PKG_LICENSE="MIT"
+TERMUX_PKG_MAINTAINER="@termux"
+TERMUX_PKG_VERSION=2.0.16
+TERMUX_PKG_SRCURL=https://github.com/emscripten-core/emscripten/archive/${TERMUX_PKG_VERSION}.tar.gz
+TERMUX_PKG_SHA256=6a1732596349637953ba5c403c47ce064c80773816050066a5b130293666f59c
+TERMUX_PKG_DEPENDS="python, nodejs, binaryen"
+TERMUX_PKG_BUILD_DEPENDS="cmake"
+TERMUX_PKG_BUILD_IN_SRC=true
+TERMUX_PKG_HOSTBUILD=true
+
+# https://github.com/emscripten-core/emscripten/issues/11362
+# switch to stable LLVM and drop building here once above is fixed
+# build from main branch for now
+LLVM_COMMIT_HASH=a50037aaa6d5df403ff6b709a367164313ffd23f
+LLVM_CHECKSUM=2fdcf716633884749758e6c6d239b555b7fe0b75e4b57d81c1fe231e1db16dad
+
+# https://github.com/emscripten-core/emsdk/blob/master/emsdk.py
+LLVM_BUILD_ARGS="
+-DCMAKE_BUILD_TYPE=Release
+-DPYTHON_EXECUTABLE=$(which python3)
+-DLLVM_INCLUDE_EXAMPLES=OFF
+-DCLANG_INCLUDE_EXAMPLES=OFF
+-DLLVM_INCLUDE_TESTS=OFF
+-DCLANG_INCLUDE_TESTS=OFF
+-DLLVM_ENABLE_ASSERTIONS=OFF
+-DLLVM_ENABLE_PROJECTS='clang;clang;lld;lld'
+-DLLVM_TABLEGEN=$TERMUX_PKG_HOSTBUILD_DIR/bin/llvm-tblgen
+-DCLANG_TABLEGEN=$TERMUX_PKG_HOSTBUILD_DIR/bin/clang-tblgen
+"
+
+termux_step_post_get_source() {
+	termux_download "https://github.com/llvm/llvm-project/archive/$LLVM_COMMIT_HASH.zip" "$TERMUX_PKG_CACHEDIR/llvm.zip" "$LLVM_CHECKSUM"
+	unzip -qo "$TERMUX_PKG_CACHEDIR/llvm.zip" -d "$TERMUX_PKG_CACHEDIR"
+}
+
+termux_step_host_build() {
+	termux_setup_cmake
+	cmake $LLVM_BUILD_ARGS "$TERMUX_PKG_CACHEDIR/llvm-project-$LLVM_COMMIT_HASH/llvm"
+	cmake --build "$TERMUX_PKG_HOSTBUILD_DIR" -j "$TERMUX_MAKE_PROCESSES" --target llvm-tblgen clang-tblgen
+}
+
+termux_step_make() {
+	# from packages/libllvm/build.sh
+	export LLVM_DEFAULT_TARGET_TRIPLE=${CCTERMUX_HOST_PLATFORM/-/-unknown-}
+	export LLVM_TARGET_ARCH
+	case "$TERMUX_ARCH" in
+		arm)			LLVM_TARGET_ARCH=ARM ;;
+		aarch64)		LLVM_TARGET_ARCH=AArch64 ;;
+		i686|x86_64)	LLVM_TARGET_ARCH=X86 ;;
+		*)				termux_error_exit "Invalid arch: $TERMUX_ARCH" ;;
+	esac
+
+	LLVM_BUILD_ARGS+=" -DLLVM_TARGET_ARCH=$LLVM_TARGET_ARCH"
+	LLVM_BUILD_ARGS+=" -DLLVM_TARGETS_TO_BUILD=WebAssembly;$LLVM_TARGET_ARCH"
+	LLVM_BUILD_ARGS+=" -DLLVM_HOST_TRIPLE=$LLVM_DEFAULT_TARGET_TRIPLE"
+	LLVM_BUILD_ARGS+=" -DCMAKE_INSTALL_PREFIX=$TERMUX_PREFIX/lib/emscripten/llvm"
+
+	termux_setup_cmake
+	cmake $LLVM_BUILD_ARGS -S "$TERMUX_PKG_CACHEDIR/llvm-project-$LLVM_COMMIT_HASH/llvm" -B "$TERMUX_PKG_CACHEDIR/build"
+	cmake --build "$TERMUX_PKG_CACHEDIR/build" -j "$TERMUX_MAKE_PROCESSES" --target install
+
+	# first run generates .emscripten and exits immediately
+	./emcc
+	sed -i .emscripten -e "s|'EMSCRIPTEN'.*|'EMSCRIPTEN', '$TERMUX_PREFIX/lib/emscripten')) # directory|"
+	sed -i .emscripten -e "s|'LLVM'.*|'LLVM', '$TERMUX_PREFIX/lib/emscripten/llvm/bin')) # directory|"
+	sed -i .emscripten -e "s|'NODE'.*|'NODE', '$TERMUX_PREFIX/bin/node')) # executable|"
+
+	make DESTDIR="$TERMUX_PKG_TMPDIR/emscripten"
+}
+
+termux_step_make_install() {
+	tar -xvf "$TERMUX_PKG_SRCDIR/emscripten-$TERMUX_PKG_VERSION.tar.bz2" -C "$TERMUX_PREFIX/lib"
+
+	echo "#!$TERMUX_PREFIX/bin/sh" > "$TERMUX_PKG_TMPDIR/emscripten.sh"
+	echo "export PATH=\$PATH:$TERMUX_PREFIX/lib/emscripten" >> "$TERMUX_PKG_TMPDIR/emscripten.sh"
+
+	# https://github.com/emscripten-core/emscripten/issues/9098
+	echo "export EMCC_CORES=1" >> "$TERMUX_PKG_TMPDIR/emscripten.sh"
+
+	install -Dm644 "$TERMUX_PKG_TMPDIR/emscripten.sh" "$TERMUX_PREFIX/etc/profile.d/emscripten.sh"
+}

packages/emscripten/makefile.patch

@@ -0,0 +1,11 @@
+--- ./Makefile	2021-03-29 15:57:43.340000000 +0000
++++ ./Makefile	2021-03-29 15:57:51.630000000 +0000
+@@ -1,5 +1,7 @@
+ VERSION = $(shell cat emscripten-version.txt | sed s/\"//g)
+-DESTDIR ?= ../emscripten-$(VERSION)
++ifeq ($(DESTDIR),)
++	DESTDIR := $(shell mktemp -d)/emscripten-$(VERSION)
++endif
+ DISTFILE = emscripten-$(VERSION).tar.bz2
+
+ dist: $(DISTFILE)

packages/emscripten/tools_install.py.patch

@@ -0,0 +1,12 @@
+--- ./tools/install.py	2021-03-29 16:03:59.490000000 +0000
++++ ./tools/install.py	2021-03-29 16:04:02.660000000 +0000
+@@ -37,6 +37,9 @@
+
+
+ def add_revision_file(target):
++  if not os.path.exists('.git'):
++    print('skipping generate emscripten-revision.txt as .git directory does not exist')
++    return
+   # text=True would be better than encoding here, but it's only supported in 3.7+
+   git_hash = subprocess.check_output(['git', 'rev-parse', 'HEAD'], encoding='utf-8').strip()
+   with open(os.path.join(target, 'emscripten-revision.txt'), 'w') as f: