diff -Nru pd-lib-builder-0.5.1/CHANGELOG.txt pd-lib-builder-0.6.0/CHANGELOG.txt
--- pd-lib-builder-0.5.1/CHANGELOG.txt	2018-03-15 21:04:08.000000000 +0000
+++ pd-lib-builder-0.6.0/CHANGELOG.txt	2019-12-22 13:18:40.000000000 +0000
@@ -1,5 +1,12 @@
 Changelog for Makefile.pdlibbuilder.
 
+v0.6.0, dated 2019-12-21
+- detect target platform (OS and architecture) rather than build platform (#55)
+- introduce optional user variable 'PLATFORM' for cross compilation
+- no longer build OSX/MacOS fat binaries by default (#21, #50)
+- do build fat binaries when 'extension=d_fat' is specified for OSX/MacOS
+- fix bug where minimum OSX/MacOS version wasn't defined, and set it to 10.6
+
 v0.5.1, dated 2018-03-15
 Fixes and improvements for Windows builds:
 - properly evaluate variables 'PDDIR' and 'PDBINDIR' to find pd.dll
@@ -32,7 +39,7 @@
 (bugfix, pull request #22, commit 48c4127)
 
 v0.4.0, dated 2016-10-14
-Introduced path variables PDDIR, PDINCLUDEDIR, PDBINDIR, PDLIBDIR which can 
+Introduced path variables PDDIR, PDINCLUDEDIR, PDBINDIR, PDLIBDIR which can
 also be defined in environment.
 (feature, issue #27, commit b0dab72)
 
diff -Nru pd-lib-builder-0.5.1/debian/changelog pd-lib-builder-0.6.0/debian/changelog
--- pd-lib-builder-0.5.1/debian/changelog	2018-03-20 20:17:26.000000000 +0000
+++ pd-lib-builder-0.6.0/debian/changelog	2020-01-08 13:58:36.000000000 +0000
@@ -1,3 +1,19 @@
+pd-lib-builder (0.6.0-1) unstable; urgency=medium
+
+  [ IOhannes m zmölnig ]
+  * New upstream version 0.6.0
+    * Regenerate d/copyright_hints
+  * Install tips-and-tricks
+    * Add patch to fix cross-compilation docs
+  * Drop obsolete d/source/local-options
+  * Bump dh-compat to 12
+  * Bump standards-version to 4.4.1
+
+  [ Ondřej Nový ]
+  * Use debhelper-compat instead of debian/compat
+
+ -- IOhannes m zmölnig (Debian/GNU) <umlaeute@debian.org>  Wed, 08 Jan 2020 14:58:36 +0100
+
 pd-lib-builder (0.5.1-1) unstable; urgency=medium
 
   * New upstream version 0.5.1
diff -Nru pd-lib-builder-0.5.1/debian/compat pd-lib-builder-0.6.0/debian/compat
--- pd-lib-builder-0.5.1/debian/compat	2018-03-20 20:17:26.000000000 +0000
+++ pd-lib-builder-0.6.0/debian/compat	1970-01-01 00:00:00.000000000 +0000
@@ -1 +0,0 @@
-11
diff -Nru pd-lib-builder-0.5.1/debian/control pd-lib-builder-0.6.0/debian/control
--- pd-lib-builder-0.5.1/debian/control	2018-03-20 20:17:26.000000000 +0000
+++ pd-lib-builder-0.6.0/debian/control	2020-01-08 13:58:36.000000000 +0000
@@ -5,8 +5,8 @@
 Uploaders:
  IOhannes m zmölnig (Debian/GNU) <umlaeute@debian.org>,
 Build-Depends:
- debhelper (>=11~),
-Standards-Version: 4.1.3
+ debhelper-compat (= 12),
+Standards-Version: 4.4.1
 Homepage: https://github.com/pure-data/pd-lib-builder
 Vcs-Git: https://salsa.debian.org/multimedia-team/pd/pd-lib-builder.git
 Vcs-Browser: https://salsa.debian.org/multimedia-team/pd/pd-lib-builder
diff -Nru pd-lib-builder-0.5.1/debian/copyright_hints pd-lib-builder-0.6.0/debian/copyright_hints
--- pd-lib-builder-0.5.1/debian/copyright_hints	2018-03-20 20:17:26.000000000 +0000
+++ pd-lib-builder-0.6.0/debian/copyright_hints	2020-01-08 13:58:36.000000000 +0000
@@ -9,9 +9,10 @@
  ./README.md
  ./debian/README.source
  ./debian/changelog
- ./debian/compat
  ./debian/control
  ./debian/gbp.conf
+ ./debian/patches/fix-crosscompilation-docs.patch
+ ./debian/patches/series
  ./debian/pd-lib-builder.docs
  ./debian/pd-lib-builder.install
  ./debian/rules
diff -Nru pd-lib-builder-0.5.1/debian/patches/fix-crosscompilation-docs.patch pd-lib-builder-0.6.0/debian/patches/fix-crosscompilation-docs.patch
--- pd-lib-builder-0.5.1/debian/patches/fix-crosscompilation-docs.patch	1970-01-01 00:00:00.000000000 +0000
+++ pd-lib-builder-0.6.0/debian/patches/fix-crosscompilation-docs.patch	2020-01-08 13:58:36.000000000 +0000
@@ -0,0 +1,17 @@
+Description: fixed confusing documentation about cross-compilation
+Author: IOhannes m zmölnig
+Bug: https://github.com/pure-data/pd-lib-builder/issues/57
+Last-Update: 2020-01-08
+---
+This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
+--- pd-lib-builder.orig/tips-tricks.md
++++ pd-lib-builder/tips-tricks.md
+@@ -3,7 +3,7 @@
+ 
+ # Creating special builds
+ 
+-## cross-compiling on linux x86_64 for other platforms
++## cross-compiling on linux for other platforms and architectures
+ 
+ Using pd-lib-builder >=0.6.0 we can define variable `PLATFORM` to specify a 
+ target triplet for cross-compilation. Example to build W32 binaries (assuming 
diff -Nru pd-lib-builder-0.5.1/debian/patches/series pd-lib-builder-0.6.0/debian/patches/series
--- pd-lib-builder-0.5.1/debian/patches/series	1970-01-01 00:00:00.000000000 +0000
+++ pd-lib-builder-0.6.0/debian/patches/series	2020-01-08 13:58:36.000000000 +0000
@@ -0,0 +1 @@
+fix-crosscompilation-docs.patch
diff -Nru pd-lib-builder-0.5.1/debian/pd-lib-builder.docs pd-lib-builder-0.6.0/debian/pd-lib-builder.docs
--- pd-lib-builder-0.5.1/debian/pd-lib-builder.docs	2018-03-20 20:17:26.000000000 +0000
+++ pd-lib-builder-0.6.0/debian/pd-lib-builder.docs	2020-01-08 13:58:36.000000000 +0000
@@ -1 +1,2 @@
 README.md
+tips-tricks.md
diff -Nru pd-lib-builder-0.5.1/Makefile.pdlibbuilder pd-lib-builder-0.6.0/Makefile.pdlibbuilder
--- pd-lib-builder-0.5.1/Makefile.pdlibbuilder	2018-03-15 21:04:08.000000000 +0000
+++ pd-lib-builder-0.6.0/Makefile.pdlibbuilder	2019-12-22 13:18:40.000000000 +0000
@@ -1,5 +1,5 @@
-# Makefile.pdlibbuilder dated 2018-03-15
-version = 0.5.1
+# Makefile.pdlibbuilder dated 2019-12-21
+version = 0.6.0
 
 # Helper makefile for Pure Data external libraries.
 # Written by Katja Vetter March-June 2015 for the public domain. No warranties.
@@ -99,6 +99,10 @@
 # - STRIP
 # - DESTDIR
 #
+# Optional user variables for make command line or environment:
+#
+# - PLATFORM
+#
 # Deprecated path variables:
 #
 # - pdincludepath
@@ -194,6 +198,13 @@
 # DESTDIR:
 # Prepended path component for staged install.
 #
+# PLATFORM:
+# Target platform for cross compilation in the form of GNU triplet:
+# cpu-vendor-os. Example: x86_64-w64-mingw32. This specifies the tool chain that
+# pdlibbuilder will use, if installed and locatable. System and architecture
+# will then be autodefined accordingly. In most cases no other variables need to
+# be overridden.
+#
 # CPPFLAGS:
 # Preprocessor flags which are not strictly required for building.
 #
@@ -279,6 +290,7 @@
 # vars: print makefile variables
 # allvars: print all variables
 # depend: print generated prerequisites
+# dumpmachine: print compiler output of option '-dumpmachine'
 # coffee: dummy target
 #
 # Variable $(executables) expands to class executables plus optional shared lib,
@@ -430,38 +442,55 @@
 
 
 ################################################################################
-### platform detection #########################################################
+### target platform detection ##################################################
 ################################################################################
 
 
+#=== target platform ===========================================================
+
+
+# PLATFORM: optional user variable to define target platform for cross
+# compilation. Redefine build tools accordingly. PLATFORM should match
+# the exact target prefix of tools present in $PATH, like x86_64-w64-mingw32,
+# x86_64-apple-darwin12 etc. Tool definitions are exported to ensure submakes
+# will get the same.
+
+ifneq ($(PLATFORM),)
+  ifneq ($(findstring darwin, $(PLATFORM)),)
+    export CC = $(PLATFORM)-cc
+    export CXX = $(PLATFORM)-c++
+    export CPP = $(PLATFORM)-cc
+  else
+    export CC = $(PLATFORM)-gcc
+    export CXX = $(PLATFORM)-g++
+    export CPP = $(PLATFORM)-cpp
+  endif
+  STRIP = $(PLATFORM)-strip
+endif
+
+# Let (native or cross-) compiler report target triplet and isolate individual
+# words therein to facilitate later processing.
+target.triplet := $(subst -, ,$(shell $(CC) -dumpmachine))
+
+
 #=== operating system ==========================================================
 
 
 # The following systems are defined: Linux, Darwin, Windows. GNU and
 # GNU/kFreeBSD are treated as Linux to get the same options.
 
-uname := $(shell uname)
-
-ifeq ($(findstring $(uname), Linux GNU GNU/kFreeBSD), $(uname))
+ifneq ($(filter linux gnu% kfreebsd, $(target.triplet)),)
   system = Linux
 endif
 
-ifeq ($(uname), Darwin)
+ifneq ($(filter darwin%, $(target.triplet)),)
   system = Darwin
 endif
 
-ifeq ($(filter MINGW% MSYS%, $(uname)), $(uname)) 
+ifneq ($(filter mingw% cygwin%, $(target.triplet)),)
   system = Windows
 endif
 
-# Unfortunately not all Mingw versions provide a link cc > gcc, therefore
-# gcc is hardcoded here (but not if CC is redefined).
-ifeq ($(system), Windows)
-  ifeq ($(origin CC), default)
-    CC = gcc
-  endif
-endif
-
 # evaluate possible system-specific multiline defines from library makefile
 $(eval $(for$(system)))
 
@@ -472,24 +501,13 @@
 #=== architecture ==============================================================
 
 
-# native architecture of the build machine
-build.arch := $(shell uname -m)
+# The following CPU names can be processed by pdlibbuilder:
+# i*86    Intel 32 bit
+# x86_64  Intel 64 bit
+# arm     ARM 32 bit
+# aarch64 ARM 64 bit
 
-# Target architecture as reported by compiler. Give precedence to eventual
-# user-defined compiler. The first field of <cpu>-<vendor>-<os> is extracted.
-ifneq ($(origin CXX), default)
-  dumpmachine.cpu = $(firstword $(subst -, ,$(shell $(CXX) -dumpmachine)))
-else
-  dumpmachine.cpu = $(firstword $(subst -, ,$(shell $(CC) -dumpmachine)))
-endif
-
-# Target architecture as reported by compiler is only used for Windows at the
-# moment. For other systems this still has to be tested.
-ifeq ($(system), Windows)
-  target.arch = $(dumpmachine.cpu)
-else
-  target.arch = $(build.arch)
-endif
+target.arch := $(firstword $(target.triplet))
 
 
 ################################################################################
@@ -501,24 +519,29 @@
 
 
 # Set architecture-dependent cflags, mainly for Linux. For Mac and Windows,
-# arch.c.flags are overriden below.
+# arch.c.flags are overriden below. To see gcc's default architecture flags:
+# $ gcc -Q --help=target
 
-# Raspberry Pi 1st generation
-ifeq ($(target.arch), armv6l)
+# ARMv6: Raspberry Pi 1st gen, not detectable from target.arch
+ifeq ($(shell uname), armv6l)
   arch.c.flags = -march=armv6 -mfpu=vfp -mfloat-abi=hard
 
-# Beagle, Udoo, RPi2 etc.
-else ifeq ($(target.arch), armv7l)
+# ARMv7: Beagle, Udoo, RPi2 etc.
+else ifeq ($(target.arch), arm)
   arch.c.flags = -march=armv7-a -mfpu=vfpv3 -mfloat-abi=hard
 
+# ARMv8 64 bit, not tested yet
+else ifeq ($(target.arch), aarch64)
+  arch.c.flags = -mcpu=cortex-a53
+
 # Intel 32 bit, build with SSE and SSE2 instructions
-else ifeq ($(findstring $(target.arch), i386 i686), $(target.arch))
+else ifneq ($(filter i%86, $(target.arch)),)
   arch.c.flags = -march=pentium4 -mfpmath=sse -msse -msse2
-  
+
 # Intel/AMD 64 bit, build with SSE, SSE2 and SSE3 instructions
-else ifeq ($(findstring $(target.arch), x86_64), $(target.arch))
+else ifeq ($(target.arch), x86_64)
   arch.c.flags = -march=core2 -mfpmath=sse -msse -msse2 -msse3
-  
+
 # if none of the above architectures detected
 else
   arch.c.flags =
@@ -549,11 +572,8 @@
 #=== flags and paths for Darwin ================================================
 
 
-# On OSX we try to build fat binaries by default. It is assumed that OSX i386
-# can build for ppc and OSX x86_64 can't. TODO: try to refine this condition.
-# LLVM-clang doesn't support -fcheck-new, therefore this flag is omitted for
-# OSX x86_64.
-
+# LLVM-clang doesn't support -fcheck-new, therefore this flag is only used when
+# compiling with g++.
 
 ifeq ($(system), Darwin)
   pkglibdir = $(HOME)/Library/Pd
@@ -570,15 +590,18 @@
   shared.ldflags = -dynamiclib -undefined dynamic_lookup \
     -install_name @loader_path/$(shared.lib) \
     -compatibility_version 1 -current_version 1.0
-  version.flag := $(filter $(cflags), -mmacosx-version-min=%)
-  ifeq ($(target.arch), i386)
+  ifneq ($(filter %g++, $(CXX)),)
     cxx.flags := -fcheck-new
-    arch := ppc i386 x86_64
-    version.flag ?= -mmacosx-version-min=10.4
   endif
-  ifeq ($(target.arch), x86_64)
+  ifeq ($(extension), d_fat)
     arch := i386 x86_64
-    version.flag ?= -mmacosx-version-min=10.5
+  else
+    arch := $(target.arch)
+  endif
+  ifneq ($(filter -mmacosx-version-min=%, $(cflags)),)
+    version.flag := $(filter -mmacosx-version-min=%, $(cflags))
+  else
+    version.flag = -mmacosx-version-min=10.6
   endif
   arch.c.flags := $(addprefix -arch , $(arch)) $(version.flag)
   arch.ld.flags := $(arch.c.flags)
@@ -599,7 +622,7 @@
 # required because of parentheses in variable name.
 ifeq ($(system), Windows)
   pkglibdir := $(APPDATA)/Pd
-  ifeq ($(MINGW_CHOST), i686-w64-mingw32)
+  ifeq ($(target.arch), i686)
     programfiles := ${ProgramFiles(x86)}
   else
     programfiles := $(PROGRAMFILES)
@@ -622,9 +645,9 @@
 # TODO: decide whether -mms-bitfields should be specified.
 ifeq ($(system), Windows)
   cpp.flags := -DMSW -DNT
-  ifeq ($(filter i%86 mingw32, $(target.arch)), $(target.arch))
+  ifeq ($(target.arch), i686)
      arch.c.flags := -march=pentium4 -msse -msse2 -mfpmath=sse
-  else ifeq (x86_64, $(target.arch))
+  else ifeq ($(target.arch), x86_64)
     cpp.flags := -DMSW -DNT -DPD_LONGINTTYPE=__int64
     arch.c.flags := -march=core2 -msse -msse2 -msse3 -mfpmath=sse
   else
@@ -728,6 +751,18 @@
 # At this point most variables are defined. Now do some checks and info's
 # before rules begin.
 
+# print Makefile.pdlibbuilder version before possible termination
+$(info ++++ info: using Makefile.pdlibbuilder version $(version))
+
+# Terminate if target triplet remained empty, to avoid all sorts of confusing
+# scenarios and spurious bugs.
+ifeq ($(target.triplet),)
+  $(error Command "$(CC) -dumpmachine" did not return a target triplet, \
+  needed for a build. \
+  Is compiler "$(CC)" installed in your PATH? ($(PATH)). \
+  Does compiler "$(CC)" support option "-dumpmachine"?)
+endif
+
 # 'forward declaration' of default target, needed to do checks
 all:
 
@@ -754,9 +789,6 @@
   pddll := $(shell ls "$(PDBINDIR)/pd.dll")
 endif
 
-# print Makefile.pdlibbuilder version
-$(info ++++ info: using Makefile.pdlibbuilder version $(version))
-
 # when making target all, check if m_pd.h is found and print info about it
 ifeq ($(goals), all)
   $(if $(mpdh), \
@@ -1277,6 +1309,16 @@
 	@echo
 
 
+#=== platform test =============================================================
+
+
+# This target can be used to test if the compiler for specified PLATFORM is
+# correctly defined and available.
+
+dumpmachine:
+	@$(CC) -dumpmachine
+
+
 #=== dummy target ==============================================================
 
 
diff -Nru pd-lib-builder-0.5.1/README.md pd-lib-builder-0.6.0/README.md
--- pd-lib-builder-0.5.1/README.md	2018-03-15 21:04:08.000000000 +0000
+++ pd-lib-builder-0.6.0/README.md	2019-12-22 13:18:40.000000000 +0000
@@ -2,10 +2,10 @@
 
 ### Makefile.pdlibbuilder ###
 
-Helper makefile for Pure Data external libraries.
-Written by Katja Vetter March-June 2015 for the public domain. No warranties.
-Inspired by Hans Christoph Steiner's Makefile Template and Stephan Beal's
-ShakeNMake.
+Helper makefile for Pure Data external libraries. Written by Katja Vetter
+March-June 2015 for the public domain and since then developed as a Pd
+community project. No warranties. Inspired by Hans Christoph Steiner's Makefile
+Template and Stephan Beal's ShakeNMake.
 
 GNU make version >= 3.81 required.
 
@@ -13,7 +13,7 @@
 ### characteristics ###
 
 
-* defines build settings based on autodetected OS and architecture
+* defines build settings based on autodetected target platform
 * defines rules to build Pd class- or lib executables from C or C++ sources
 * defines rules for libdir installation
 * defines convenience targets for developer and user
@@ -52,7 +52,7 @@
 override platform-dependent defaults:
 
 PDDIR:
-Root directory of 'portable' pd package. When defined, PDINCLUDEDIR and 
+Root directory of 'portable' pd package. When defined, PDINCLUDEDIR and
 PDBINDIR will be evaluated as $(PDDIR)/src and $(PDDIR)/bin.
 
 PDINCLUDEDIR:
@@ -74,7 +74,8 @@
 This README.md provides only basic information. A large comment section inside
 Makefile.pdlibbuilder lists and explains the available user variables, default
 paths, and targets. The internal documentation reflects the exact functionality
-of the particular version. A tips&tricks page is in the works. 
+of the particular version. For suggestions about project maintenance and
+advanced compilation see tips-tricks.md.
 
 
 ### versioning ###
@@ -82,32 +83,80 @@
 
 The project is versioned in MAJOR.MINOR.BUGFIX format (see http://semver.org),
 and maintained at https://github.com/pure-data/pd-lib-builder. Pd lib developers
-are invited to regulary check for updates, and to contribute and discuss 
+are invited to regulary check for updates, and to contribute and discuss
 improvements here. If you really need to distribute a personalized version with
 your library, rename Makefile.pdlibbuilder to avoid confusion.
 
 
 ### examples ###
 
+The list of projects using pd-lib-builder can be helpful if you are looking for
+examples, from the simplest use case to more complex implementations.
 
-Here are a few projects using the Makefile.pdlibbuilder approach:
+- helloworld: traditional illustration of simplest use case
+- pd-windowing: straightforward real world use case of a small library
+- pd-nilwind / pd-cyclone: more elaborate source tree
+- zexy: migrated from autotools to pd-lib-builder
+
+
+### projects using pd-lib-builder ###
+
+non-exhaustive list
 
 https://github.com/pure-data/helloworld
 
-https://github.com/electrickery/pd-cyclone (stable)
+https://github.com/electrickery/pd-nilwind
+
+https://github.com/electrickery/pd-maxlib
+
+https://github.com/electrickery/pd-sigpack
+
+https://github.com/electrickery/pd-tof
+
+https://github.com/electrickery/pd-windowing
+
+https://github.com/electrickery/pd-smlib
+
+https://github.com/porres/pd-cyclone
+
+https://github.com/porres/pd-else
+
+https://github.com/porres/pd-psycho
+
+https://git.iem.at/pd/comport
 
-https://github.com/porres/pd-cyclone (experimental)
+https://git.iem.at/pd/hexloader
+
+https://git.iem.at/pd/iemgui
 
 https://git.iem.at/pd/iemguts
 
+https://git.iem.at/pd/iemlib
+
 https://git.iem.at/pd/iemnet
 
 https://git.iem.at/pd/iem_ambi
 
+https://git.iem.at/pd/iem_tab
+
+https://git.iem.at/pd/iem_adaptfilt
+
+https://git.iem.at/pd/iem_roomsim
+
+https://git.iem.at/pd/iem_spec2
+
 https://git.iem.at/pd/mediasettings
 
+https://git.iem.at/pd/zexy
+
 https://git.iem.at/pd-gui/punish
 
 https://github.com/residuum/PuRestJson
 
-More examples will be referenced here when they are available. 
+https://github.com/libpd/abl_link
+
+https://github.com/wbrent/timbreID
+
+https://github.com/MetaluNet/moonlib
+
+
diff -Nru pd-lib-builder-0.5.1/tips-tricks.md pd-lib-builder-0.6.0/tips-tricks.md
--- pd-lib-builder-0.5.1/tips-tricks.md	2018-03-15 21:04:08.000000000 +0000
+++ pd-lib-builder-0.6.0/tips-tricks.md	2019-12-22 13:18:40.000000000 +0000
@@ -3,16 +3,35 @@
 
 # Creating special builds
 
-## cross-compiling W32 binaries from linux
+## cross-compiling on linux x86_64 for other platforms
 
-I'm using the following to cross-compile W32 binaries on my Debian/64bit system,
-using `mingw-w64`.
+Using pd-lib-builder >=0.6.0 we can define variable `PLATFORM` to specify a 
+target triplet for cross-compilation. Example to build W32 binaries (assuming 
+package `mingw-w64` is installed and a W32 package for Pd is unzipped into a 
+path `${PDWIN32}`:
 
-Assuming you have unzipped a W32 package for Pd into `${WINPDPATH}`, run:
+    make PLATFORM=x86_64-w64-mingw32 PDDIR="${PDWIN32}"
 
-    make system=Windows pdbinpath="${WINPDPATH}/bin/" pdincludepath="${WINPDPATH}/src/" CC=i686-w64-mingw32-gcc
+#### older pd-lib-builder versions
 
-(if the project uses C++, you might also need to set `CXX=i686-w64-mingw32-g++`)
+Using pd-lib-builder < 0.6.0, in the absence of variable `PLATFORM`, you would
+instead override variables `system`, `target.arch`, `CC` and / or `CXX`,
+`STRIP`. Example:
+
+    make system=Windows target.arch=i686 CC=i686-w64-mingw32-gcc STRIP=i686-w64-mingw32-strip PDDIR="${PDWIN32}"
+
+#### toolchains
+
+Cross toolchains for relevant platforms in Debian Buster (install g++ 
+with dependencies for a given platform to get the whole tool chain):
+
+- `arm-linux-gnueabihf`
+- `aarch64-linux-gnu`
+- `i686-linux-gnu`
+- `i686-w64-mingw32` and `x86_64-w64-mingw32` (install `mingw-w64`)
+
+OSX/MacOS cross tool chains are not distributed by Debian. Use project 
+`osxcross` from Thomas Poechtraeger to create the tools.
 
 ## building double-precision externals