Revise libsingular_julia

Adapt to latest CxxWrap; in particular, build separate binaries for each
minor Julia version (1.3, 1.4, 1.5, ...)

This also adds support for more platforms.

The build dependencies on GMP_jll and MPFR_jll were only implicit so far,
but we need to make them explicit and with version constraints to avoid
issues on macOS (when this JLL is built against a too-new version of either
of these libraries, it becomes unloadable in older Julia versions)

L/libsingular_julia/build_tarballs.jl → L/libsingular_julia/common.jl

@@ -4,21 +4,16 @@ using BinaryBuilder
 import Pkg: PackageSpec
 
 const name = "libsingular_julia"
-const version = v"0.2.0"
+const version = VersionNumber(0, 2, julia_version.minor)
 
 # Collection of sources required to build libsingular-julia
 const sources = [
-    ArchiveSource("https://github.com/oscar-system/libsingular-julia/archive/v$(version).tar.gz",
-                  "ee4e5ef96caf9d18553600d87f922e5d40cb1c7d30a1697c92b23b493498db1a"),
+    GitSource("https://github.com/oscar-system/libsingular-julia",
+              "d88ee35e8a1cb10be271d1482ee7c8e3f108e2e4"),
 ]
 
 # Bash recipe for building across all platforms
 const script = raw"""
-# remove $libdir from LD_LIBRARY_PATH as this causes issues with perl
-if [[ -n "$LD_LIBRARY_PATH" ]]; then
-LD_LIBRARY_PATH=$(echo -n $LD_LIBRARY_PATH | sed -e "s|[:^]$libdir\w*|:|g")
-fi
-
 cmake libsingular-j*/ -B build \
    -DJulia_PREFIX="$prefix" \
    -DCMAKE_INSTALL_PREFIX="$prefix" \
@@ -34,16 +29,17 @@ install_license $WORKSPACE/srcdir/libsingular-j*/LICENSE.md
 
 # These are the platforms we will build for by default, unless further
 # platforms are passed in on the command line
-const platforms = expand_cxxstring_abis([
-    Platform("x86_64", "linux"; libc="glibc", cxxstring_abi = "cxx11"),
-    Platform("x86_64", "macos"; cxxstring_abi = "cxx11"),
-    #Platform("i686", "linux"; libc="glibc", cxxstring_abi="cxx11"), # Wrapper code is buggy
-    #Platform("x86_64", "freebsd"; cxxstring_abi = "cxx11"),
-])
+platforms = supported_platforms()
+
+# skip i686 musl builds (not supported by libjulia_jll)
+filter!(p -> !(Sys.islinux(p) && libc(p) == "musl" && arch(p) == "i686"), platforms)
+
+# skip PowerPC builds in Julia 1.3 (not supported by libjulia_jll)
+if julia_version < v"1.4"
+    filter!(p -> !(Sys.islinux(p) && arch(p) == "powerpc64le"), platforms)
+end
 
-#platforms = supported_platforms()
-#platforms = filter!(!Sys.iswindows, platforms)
-#platforms = expand_cxxstring_abis(platforms)
+platforms = expand_cxxstring_abis(platforms)
 
 # The products that we will ensure are always built
 const products = [
@@ -53,10 +49,14 @@ const products = [
 # Dependencies that must be installed before this package can be built
 const dependencies = [
     Dependency("CompilerSupportLibraries_jll"),
-    BuildDependency(PackageSpec(name="Julia_jll", version="v1.4.1")),
-    Dependency("libcxxwrap_julia_jll"),
+    BuildDependency(PackageSpec(name="libjulia_jll", version=julia_version))
+    Dependency("libcxxwrap_julia_jll", VersionNumber(0, 8, julia_version.minor)),
     Dependency("Singular_jll"),
+    BuildDependency(PackageSpec(name="GMP_jll", version=v"6.1.2")),
+    BuildDependency(PackageSpec(name="MPFR_jll", version=v"4.0.2")),
 ]
 
 # Build the tarballs, and possibly a `build.jl` as well.
-build_tarballs(ARGS, name, version, sources, script, platforms, products, dependencies; preferred_gcc_version=v"7")
+build_tarballs(ARGS, name, version, sources, script, platforms, products, dependencies;
+    preferred_gcc_version=v"7",
+    julia_compat = "$(julia_version.major).$(julia_version.minor)")

L/libsingular_julia/libsingular_julia@1.3/build_tarballs.jl

@@ -0,0 +1,2 @@
+const julia_version = v"1.3.1"
+include("../common.jl")