* add aarch64 architecture (#3707)

* install license

Co-authored-by: Juergen Fuhrmann <[email protected]>

T/Triangle/build_tarballs.jl

@@ -1,36 +1,46 @@
 using BinaryBuilder
 
 name = "Triangle"
-version = v"1.6.0"
+version = v"1.6.1"
 
 # Collection of sources required to build Triangle by J. Shewchuk
 #
 # More info:
 # https://www.cs.cmu.edu/~quake/triangle.html
 # https://github.com/JuliaGeometry/Triangulate.jl
-#
+ #
 # Please be aware that triunsuitable.c is not part of the original Triangle distribution.
 # It provides the possibility to pass a cfunction created in Julia as  user refinement callback.
 # For this reason at least triunsiutable.c must be downloaded from Triangulate.jl repo, and
 # for simplicity, we do this for the whole code.
-# We also patch the code in order to replace exit() calls in the C code  so that we can
-# throw an error instead.
 sources = [
     GitSource("https://github.com/JuliaGeometry/Triangulate.jl.git","b2ffb23ca7d89c567fd31367882bd216757cdb9c")
 ]
 
 script = raw"""
 cd $WORKSPACE/srcdir/Triangulate.jl/deps/src
 mkdir -p "${libdir}"
+
+# Patch the code in order to replace exit() calls in the C code  so that we can
+# throw an error instead.
 sed -e "s/  exit/extern void error_exit(int); error_exit/g" triangle/triangle.c > triangle_patched.c
-$CC -Itriangle -DREAL=double -DTRILIBRARY -O3 -fPIC -DNDEBUG -DNO_TIMER -DEXTERNAL_TEST $LDFLAGS --shared -o "${libdir}/libtriangle.${dlext}" triangle_patched.c triwrap.c
+
+# Concerning the suppression of int - pointer cast warnings,
+# see the following comment in triangle.c:
+#
+# encode() compresses an oriented triangle into a single pointer.  It 
+# relies on the assumption that all triangles are aligned to four-byte
+# boundaries, so the two least significant bits of (otri).tri are zero.
+#
+# So there is an inherent hack in the code which we have to allow and hope things keep working.
+$CC -Itriangle  -Wno-int-to-pointer-cast  -Wno-pointer-to-int-cast -DREAL=double -DTRILIBRARY -O3 -fPIC -DNDEBUG -DNO_TIMER -DEXTERNAL_TEST $LDFLAGS --shared -o "${libdir}/libtriangle.${dlext}" triangle_patched.c triwrap.c
+
+install_license triangle/README
 """
 
-platforms = supported_platforms()
-products = [
-    LibraryProduct("libtriangle", :libtriangle)
-]
+platforms = supported_platforms(; experimental=true)
+products = [LibraryProduct("libtriangle", :libtriangle)]
 dependencies = Dependency[]
 
-build_tarballs(ARGS, name, version, sources, script, platforms, products, dependencies)
+build_tarballs(ARGS, name, version, sources, script, platforms, products, dependencies, julia_compat="1.6")