Changed protoc to build v3.16.0

P/protobuf/bundled/files/c++safe

@@ -0,0 +1,2 @@
+#!/bin/bash
+exec c++ $(echo '' "$@" '' | sed -e 's/ -Ofast / -O3 -fexcess-precision=fast -fno-math-errno /g;s/ -ffast-math / -fexcess-precision=fast -fno-math-errno /g;s/ -funsafe-math-optimizations / /g;s/ -march=[^ ]* / /g;s/ -maes / /g;s/ -msse4[.]1 / /g;s/ -Xarch_[^ ]* / /g')

P/protobuf/bundled/files/ccsafe

@@ -0,0 +1,2 @@
+#!/bin/bash
+exec cc $(echo '' "$@" '' | sed -e 's/ -Ofast / -O3 -fexcess-precision=fast -fno-math-errno /g;s/ -ffast-math / -fexcess-precision=fast -fno-math-errno /g;s/ -funsafe-math-optimizations / /g;s/ -march=[^ ]* / /g;s/ -maes / /g;s/ -msse4[.]1 / /g;s/ -Xarch_[^ ]* / /g')

P/protobuf/common.jl

@@ -0,0 +1,44 @@
+version = v"3.16.0"
+
+sources = [
+    GitSource("https://github.com/protocolbuffers/protobuf.git", "2dc747c574b68a808ea4699d26942c8132fe2b09"),
+    DirectorySource(joinpath(@__DIR__, "bundled")),
+]
+
+script = raw"""
+cd $WORKSPACE/srcdir/protobuf
+
+# Avoid problems with `-march`, `-ffast-math` etc.
+sed -i -e 's!set(CMAKE_C_COMPILER.*!set(CMAKE_C_COMPILER '${WORKSPACE}/srcdir/files/ccsafe')!' ${CMAKE_TARGET_TOOLCHAIN}
+sed -i -e 's!set(CMAKE_CXX_COMPILER.*!set(CMAKE_CXX_COMPILER '${WORKSPACE}/srcdir/files/c++safe')!' ${CMAKE_TARGET_TOOLCHAIN}
+
+cmake_extra_args=()
+if [[ "$BUILD_SHARED_LIBS" == "OFF" ]]; then
+    cmake_extra_args+=(
+        -DCMAKE_POSITION_INDEPENDENT_CODE=ON \
+    )
+fi
+
+cmake \
+    -B work \
+    -G Ninja \
+    -DBUILD_SHARED_LIBS=$BUILD_SHARED_LIBS \
+    -DCMAKE_BUILD_TYPE=Release \
+    -DCMAKE_CXX_STANDARD=14 \
+    -DCMAKE_FIND_ROOT_PATH=${prefix} \
+    -DCMAKE_INSTALL_PREFIX=${prefix} \
+    -DCMAKE_TOOLCHAIN_FILE=${CMAKE_TARGET_TOOLCHAIN} \
+    -Dprotobuf_BUILD_PROTOC_BINARIES=OFF \
+    -Dprotobuf_BUILD_TESTS=OFF \
+    ${cmake_extra_args[@]} \
+    cmake
+cmake --build work --parallel ${nproc}
+cmake --install work
+install_license LICENSE
+"""
+
+platforms = expand_cxxstring_abis(supported_platforms())
+
+dependencies = [
+    Dependency("Zlib_jll")
+]

P/protobuf/protobuf/build_tarballs.jl

@@ -0,0 +1,20 @@
+# 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
+
+include(joinpath(@__DIR__, "..", "common.jl"))
+
+name = "protobuf"
+
+script = raw"""
+export BUILD_SHARED_LIBS=ON
+""" *
+script
+
+products = [
+    LibraryProduct("libprotobuf", :libprotobuf),
+    LibraryProduct("libprotobuf-lite", :libprotobuf_lite),
+]
+
+build_tarballs(ARGS, name, version, sources, script, platforms, products, dependencies;
+               julia_compat="1.6", preferred_gcc_version=v"9")

P/protobuf/protobuf_static/build_tarballs.jl

@@ -0,0 +1,20 @@
+# 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
+
+include(joinpath(@__DIR__, "..", "common.jl"))
+
+name = "protobuf_static"
+
+script = raw"""
+export BUILD_SHARED_LIBS=OFF
+""" *
+script
+
+products = [
+    FileProduct("lib/libprotobuf.a", :libprotobuf_static),
+    FileProduct("lib/libprotobuf-lite.a", :libprotobuf_lite_static),
+]
+
+build_tarballs(ARGS, name, version, sources, script, platforms, products, dependencies;
+               julia_compat="1.6", preferred_gcc_version=v"9")