FlangClassic: Split Compiler and RTLib (#5316)

F/FlangClassic/FlangClassic/build_tarballs.jl

@@ -0,0 +1,20 @@
+name = "FlangClassic"
+version = v"13.0.0"
+
+include("../common.jl")
+
+# The products that we will ensure are always built
+products = Product[
+    ExecutableProduct("flang", :flang),
+    ExecutableProduct("flang1", :flang1),
+    ExecutableProduct("flang2", :flang2)
+]
+
+# We only build the compiler for musl. The rtlibs get built for all platforms in the RTLib jll
+platforms = [
+    Platform("x86_64", "linux"; libc = "musl"),
+]
+
+# Build the tarballs, and possibly a `build.jl` as well.
+build_tarballs(ARGS, name, version, sources, flang_script(true), platforms, products, dependencies;
+    julia_compat="1.6", preferred_gcc_version=v"10", lock_microarchitecture=false)

F/FlangClassic/FlangClassic_RTLib/build_tarballs.jl

@@ -0,0 +1,23 @@
+name = "FlangClassic_RTLib"
+version = v"13.0.0"
+
+include("../common.jl")
+
+push!(dependencies,
+    HostBuildDependency("FlangClassic_jll")
+)
+
+products = Product[
+    LibraryProduct("libflang", :libflang),
+    LibraryProduct("libflangrti", :libflangrti),
+    LibraryProduct("libompstub", :libompstub)
+]
+
+platforms = [
+    Platform("x86_64", "linux"; libc = "musl"),
+    Platform("x86_64", "linux"; libc = "glibc"),
+]
+
+# Build the tarballs, and possibly a `build.jl` as well.
+build_tarballs(ARGS, name, version, sources, flang_script(false), platforms, products, dependencies;
+    julia_compat="1.6", preferred_gcc_version=v"10", lock_microarchitecture=false)

F/FlangClassic/bundled/patches/flang-no-tools.patch

@@ -0,0 +1,47 @@
+diff --git a/runtime/flang/CMakeLists.txt b/runtime/flang/CMakeLists.txt
+index aefc4a4a..ca0a8312 100644
+--- a/runtime/flang/CMakeLists.txt
++++ b/runtime/flang/CMakeLists.txt
+@@ -457,7 +457,6 @@ add_custom_command(
+   > "${I8_FILES_DIR}/ieee_arithmetic.F95"
+   COMMENT "Preprocessing ieee_arithmetic.F95"
+   VERBATIM
+-  DEPENDS flang1 flang2
+ )
+
+ add_custom_command(
+@@ -467,7 +466,6 @@ add_custom_command(
+   > "${I8_FILES_DIR}/ieee_exceptions.F95"
+   COMMENT "Preprocessing ieee_exceptions.F95"
+   VERBATIM
+-  DEPENDS flang1 flang2
+ )
+
+ add_custom_command(
+@@ -477,7 +475,6 @@ add_custom_command(
+   COMMAND "${CMAKE_Fortran_COMPILER}" -E -DPGFLANG -cpp ${SEPARATED_CMAKE_Fortran_FLAGS}
+   ${CMAKE_CURRENT_SOURCE_DIR}/norm2.F95 > "norm2_1.F95"
+   VERBATIM
+-  DEPENDS flang1 flang2
+ )
+
+ # REAL*16 is not yet available on all platforms.
+@@ -697,18 +694,6 @@ target_include_directories(flang_shared
+   ${CMAKE_CURRENT_BINARY_DIR}
+   )
+
+-# Make sure the compiler is built before we bootstrap
+-add_dependencies(flang_static
+-  flang1
+-  flang2
+-  )
+-
+-# Make sure the compiler is built before we bootstrap
+-add_dependencies(flang_shared
+-  flang1
+-  flang2
+-  )
+-
+ if (NOT MSVC)
+   target_compile_options(flang_static PRIVATE -fPIC)
+   target_compile_options(flang_shared PRIVATE -fPIC)

F/FlangClassic/common.jl

@@ -0,0 +1,93 @@
+# Note that this script can accept some limited command-line arguments, run
+# `julia build_tarballs.jl --help` to see a usage message.
+using BinaryBuilder, Pkg
+
+# Collection of sources required to complete build
+sources = [
+    GitSource("https://github.com/flang-compiler/flang.git", "a459f3ca34b244c6c1e59d6495e8ec90952c2448"),
+    GitSource("https://github.com/flang-compiler/classic-flang-llvm-project.git", "528906c87cd4cae63a52c3170365cb382daf94cb"),
+    DirectorySource(joinpath(@__DIR__, "bundled"))
+]
+
+# Bash recipe for building across all platforms
+function flang_script(build_compiler)
+script = build_compiler ? "export build_compiler=1\n" : "export build_compiler=0\n"
+script *= raw"""
+cd $WORKSPACE/srcdir
+
+# Clear clang leftovers
+rm /workspace/x86_64-linux-musl-cxx11/destdir/lib/libclang* || true
+
+# Begin (LLVM + flang driver) build
+mkdir llvm-build
+cd llvm-build/
+
+## Apply LLVM patches
+atomic_patch -p1 -d ../classic-flang-llvm-project ../patches/0010-add-musl-triples.patch
+atomic_patch -p1 -d ../classic-flang-llvm-project ../patches/nosincos.patch
+
+## Configure & Build
+if [[ ${build_compiler} == 1 ]]; then
+    export LLVM_TARGET="-DLLVM_ENABLE_CLASSIC_FLANG=ON -DLLVM_ENABLE_PROJECTS=clang;openmp ../classic-flang-llvm-project/llvm/"
+else
+    export LLVM_TARGET="-DOPENMP_ENABLE_LIBOMPTARGET=OFF ../classic-flang-llvm-project/openmp"
+fi
+cmake -GNinja -DCMAKE_INSTALL_PREFIX=$prefix -DCMAKE_TOOLCHAIN_FILE=${CMAKE_TARGET_TOOLCHAIN} -DCMAKE_BUILD_TYPE=Release ${LLVM_TARGET}
+ninja
+ninja install
+install_license ../classic-flang-llvm-project/llvm/LICENSE.TXT
+cd ..
+
+# Begin pgmath build
+mkdir pgmath-build
+cd pgmath-build
+cmake -G Ninja -DCMAKE_INSTALL_PREFIX=$prefix -DCMAKE_TOOLCHAIN_FILE=${CMAKE_TARGET_TOOLCHAIN} -DCMAKE_BUILD_TYPE=Release ../flang/runtime/libpgmath/
+ninja
+ninja install
+cd ..
+
+# Begin Flang (Compiler/Runtime) build
+mkdir flang-build
+cd flang-build
+
+## Apply flang patches
+atomic_patch -p1 -d ../flang ../patches/musl-patches.patch
+atomic_patch -p1 -d ../flang ../patches/no-fastmath.patch
+atomic_patch -p1 -d ../flang ../patches/flang2-install-dir.patch
+
+## Create Compiler wrapper for flang
+if [[ ${build_compiler} == 1 ]]; then
+    # For the just-built compiler
+    cat /opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-clang | sed 's/clang/flang/g' > /opt/bin/${bb_full_target}/${target}-flang
+    chmod +x /opt/bin/${bb_full_target}/${target}-flang
+    ln -s ${WORKSPACE}/destdir/bin/flang /opt/x86_64-linux-musl/bin/flang
+else
+    # For the host compiler
+    cat /opt/bin/${bb_full_target}/${target}-clang | sed 's/clang/flang/g' > /opt/bin/${bb_full_target}/${target}-flang
+    chmod +x /opt/bin/${bb_full_target}/${target}-flang
+    ln -s ${WORKSPACE}/x86_64-linux-musl-cxx11/destdir/bin/flang /opt/x86_64-linux-musl/bin/flang
+
+    # Disable building flang1/flang2
+    atomic_patch -p1 -d ../flang ../patches/flang-no-tools.patch
+fi
+export FC=${target}-flang
+
+## Configure & Build
+export PATH=${WORKSPACE}/srcdir/flang-build/bin:$PATH
+cmake -DCMAKE_INSTALL_PREFIX=$prefix -DCMAKE_Fortran_COMPILER=${FC} -DCMAKE_Fortran_COMPILER_ID=Flang -DCMAKE_BUILD_TYPE=Release -DWITH_WERROR=OFF ../flang
+
+if [[ ${build_compiler} == 1 ]]; then
+    make -j$(nproc)
+    make install
+else
+    make -j$(nproc) -C runtime/
+    make -j$(nproc) -C runtime/ install
+fi
+install_license ../flang/LICENSE.txt
+"""
+end
+
+# Dependencies that must be installed before this package can be built
+dependencies = Any[
+    Dependency("Zlib_jll")
+]