libcxxwrap_julia: switch to libjulia

Also drop the restriction to the cxx11 ABI and add more platforms.

L/libcxxwrap_julia/build_tarballs.jl

@@ -25,16 +25,12 @@ install_license $WORKSPACE/srcdir/libcxxwrap-julia*/LICENSE.md
 
 # These are the platforms we will build for by default, unless further
 # platforms are passed in on the command line
-platforms = [
-    FreeBSD(:x86_64; compiler_abi=CompilerABI(cxxstring_abi=:cxx11)),
-    Linux(:armv7l; libc=:glibc, compiler_abi=CompilerABI(cxxstring_abi=:cxx11)),
-    Linux(:aarch64; libc=:glibc, compiler_abi=CompilerABI(cxxstring_abi=:cxx11)),
-    Linux(:x86_64; libc=:glibc, compiler_abi=CompilerABI(cxxstring_abi=:cxx11)),
-    Linux(:i686; libc=:glibc, compiler_abi=CompilerABI(cxxstring_abi=:cxx11)),
-    MacOS(:x86_64; compiler_abi=CompilerABI(cxxstring_abi=:cxx11)),
-    Windows(:x86_64; compiler_abi=CompilerABI(cxxstring_abi=:cxx11)),
-    Windows(:i686; compiler_abi=CompilerABI(cxxstring_abi=:cxx11)),
-]
+platforms = supported_platforms()
+# in Julia <= 1.4 skip all musl builds
+filter!(p -> !(Sys.islinux(p) && libc(p) == "musl"), platforms)
+# in Julia <= 1.4 skip 32bit ARM builds
+filter!(p -> !(Sys.islinux(p) && arch(p) == "armv7l"), platforms)
+platforms = expand_cxxstring_abis(platforms)
 
 # The products that we will ensure are always built
 products = [
@@ -44,7 +40,7 @@ products = [
 
 # Dependencies that must be installed before this package can be built
 dependencies = [
-    BuildDependency(PackageSpec(name="Julia_jll",version=v"1.4.1"))
+    BuildDependency(PackageSpec(name="libjulia_jll", version=v"1.4.2"))
 ]
 
 # Build the tarballs, and possibly a `build.jl` as well.