add libimagequant

L/libimagequant/build_tarballs.jl

@@ -0,0 +1,46 @@
+# Note that this script can accept some limited command-line arguments, run
+# `julia build_tarballs.jl --help` to see a usage message.
+using BinaryBuilder, BinaryBuilderBase
+
+name = "libimagequant"
+version = v"4.3.4"
+
+# Collection of sources required to complete build
+#
+sources = [
+    GitSource(
+        "https://github.com/ImageOptim/libimagequant.git",
+        "b7340db2ac06bcdb36eec11f6251eee2c6d480b1"),
+]
+
+# following https://github.com/ImageOptim/libimagequant/tree/main/imagequant-sys#building-for-c
+# we use cargo-c to install the library
+script = raw"""
+cd $WORKSPACE/srcdir/libimagequant/imagequant-sys
+cargo install cargo-c
+cargo cinstall --destdir=${sysroot} --prefix${prefix} --libdir=${libdir}
+install_license ./COPYRIGHT
+"""
+
+# These are the platforms we will build for by default, unless further
+# platforms are passed in on the command line
+platforms = supported_platforms()
+# Rust toolchain for i686 Windows is unusable
+filter!(p -> !Sys.iswindows(p) || arch(p) != "i686", platforms)
+# Rust toolchain seems to not be available for RISC-V or FreeBSD/aarch64
+filter!(p -> arch(p) != "riscv64", platforms)
+filter!(p -> os(p) != "freebsd" || arch(p) != "aarch64", platforms)
+
+# The products that we will ensure are always built
+products = [
+    LibraryProduct("libimagequant", :libimagequant),
+]
+
+# Dependencies that must be installed before this package can be built
+dependencies = Dependency[
+    HostBuildDependency("OpenSSL_jll"; compat="3.0.15"),
+]
+
+# Build the tarballs, and possibly a `build.jl` as well.
+build_tarballs(ARGS, name, version, sources, script, platforms, products, dependencies;
+               julia_compat="1.6", compilers=[:c, :rust], lock_microarchitecture=false)