llvm: allow building host for other targets

packages/lang/llvm/package.mk

@@ -5,7 +5,6 @@
 PKG_NAME="llvm"
 PKG_VERSION="13.0.1"
 PKG_SHA256="ec6b80d82c384acad2dc192903a6cf2cdbaffb889b84bfb98da9d71e630fc834"
-PKG_ARCH="x86_64"
 PKG_LICENSE="Apache-2.0"
 PKG_SITE="http://llvm.org/"
 PKG_URL="https://github.com/llvm/llvm-project/releases/download/llvmorg-${PKG_VERSION}/llvm-${PKG_VERSION}.src.tar.xz"
@@ -28,11 +27,10 @@ PKG_CMAKE_OPTS_COMMON="-DLLVM_INCLUDE_TOOLS=ON \
                        -DLLVM_ENABLE_SPHINX=OFF \
                        -DLLVM_ENABLE_OCAMLDOC=OFF \
                        -DLLVM_ENABLE_BINDINGS=OFF \
-                       -DLLVM_TARGETS_TO_BUILD=AMDGPU \
                        -DLLVM_ENABLE_TERMINFO=OFF \
                        -DLLVM_ENABLE_ASSERTIONS=OFF \
                        -DLLVM_ENABLE_WERROR=OFF \
-                       -DLLVM_ENABLE_ZLIB=ON \
+                       -DLLVM_ENABLE_ZLIB=OFF \
                        -DLLVM_ENABLE_LIBXML2=OFF \
                        -DLLVM_BUILD_LLVM_DYLIB=ON \
                        -DLLVM_LINK_LLVM_DYLIB=ON \
@@ -43,25 +41,39 @@ PKG_CMAKE_OPTS_COMMON="-DLLVM_INCLUDE_TOOLS=ON \
                        -DLLVM_ENABLE_Z3_SOLVER=OFF"
 
 pre_configure_host() {
-  PKG_CMAKE_OPTS_HOST="${PKG_CMAKE_OPTS_COMMON}"
+  case "${TARGET_ARCH}" in
+    "arm")
+      LLVM_BUILD_TARGETS="X86\;ARM"
+      ;;
+    "aarch64")
+      LLVM_BUILD_TARGETS="X86\;AArch64"
+      ;;
+    "x86_64")
+      LLVM_BUILD_TARGETS="X86\;AMDGPU"
+      ;;
+  esac
+
+  PKG_CMAKE_OPTS_HOST="${PKG_CMAKE_OPTS_COMMON} \
+                       -DLLVM_TARGETS_TO_BUILD=${LLVM_BUILD_TARGETS}"
+}
+
+post_make_host() {
+  ninja ${NINJA_OPTS} llvm-config llvm-tblgen
+}
+
+post_makeinstall_host() {
+  mkdir -p ${TOOLCHAIN}/bin
+    cp -a bin/llvm-config ${TOOLCHAIN}/bin
+    cp -a bin/llvm-tblgen ${TOOLCHAIN}/bin
 }
 
 pre_configure_target() {
   PKG_CMAKE_OPTS_TARGET="${PKG_CMAKE_OPTS_COMMON} \
+                         -DLLVM_TARGETS_TO_BUILD=AMDGPU \
                          -DLLVM_TARGET_ARCH="${TARGET_ARCH}" \
                          -DLLVM_TABLEGEN=${TOOLCHAIN}/bin/llvm-tblgen"
 }
 
-make_host() {
-  ninja ${NINJA_OPTS} llvm-config llvm-tblgen
-}
-
-makeinstall_host() {
-  cp -a lib/libLLVM-*.so ${TOOLCHAIN}/lib
-  cp -a bin/llvm-config ${TOOLCHAIN}/bin/llvm-config
-  cp -a bin/llvm-tblgen ${TOOLCHAIN}/bin
-}
-
 post_makeinstall_target() {
   mkdir -p ${SYSROOT_PREFIX}/usr/bin
     cp -a ${TOOLCHAIN}/bin/llvm-config ${SYSROOT_PREFIX}/usr/bin