Update

* Add .drone.yml for debug arm64/32 libc files.
* Fix 32-bit issue temporary in test/fiddle/helper.rb setting path.

.drone.yml

@@ -0,0 +1,73 @@
+---
+kind: pipeline
+type: docker
+name: arm64
+platform:
+  os: linux
+  arch: arm64
+steps:
+  - name: test
+    image: ruby:2.5-stretch
+    commands:
+      - uname -m
+      - apt-get -yq update
+      - apt-get -yq install software-properties-common
+      - apt-get -yq install bison sudo strace
+      # workaround ipv6 localhost
+      - ruby -e "hosts = File.read('/etc/hosts').sub(/^::1\s*localhost.*$/, ''); File.write('/etc/hosts', hosts)"
+      # create user
+      - useradd --shell /bin/bash --create-home test && chown -R test:test .
+      # configure
+      - /usr/bin/sudo -H -u test -- bash -c 'autoconf && ./configure --disable-install-doc --prefix=/tmp/ruby-prefix'
+      # make all install
+      - /usr/bin/sudo -H -u test -- make -j$(nproc) all install
+      # make test
+      # - /usr/bin/sudo -H -u test -- make test
+      # make test-spec
+      # - /usr/bin/sudo -H -u test -- make test-spec
+      # make test-all
+      # - /usr/bin/sudo -H -u test -- make test-all
+      - ls -l /lib32 || true
+      - strace -f ldd ruby || true
+      - /usr/bin/sudo -H -u test -- make test-all TESTS="test/fiddle/test_import.rb"
+trigger:
+  branch:
+    - master
+
+---
+kind: pipeline
+type: docker
+name: arm32
+platform:
+  os: linux
+  arch: arm
+steps:
+  - name: test
+    image: ruby:2.5-stretch
+    commands:
+      - uname -m
+      - apt-get -yq update
+      - apt-get -yq install software-properties-common
+      - apt-get -yq install bison sudo file
+      # workaround ipv6 localhost
+      - ruby -e "hosts = File.read('/etc/hosts').sub(/^::1\s*localhost.*$/, ''); File.write('/etc/hosts', hosts)"
+      # create user
+      - useradd --shell /bin/bash --create-home test && chown -R test:test .
+      # configure
+      - /usr/bin/sudo -H -u test -- bash -c 'autoconf && ./configure --disable-install-doc --prefix=/tmp/ruby-prefix'
+      # make all install
+      - /usr/bin/sudo -H -u test -- make -j$(nproc) all install
+      # make test
+      # - /usr/bin/sudo -H -u test -- make test
+      # make test-spec
+      # - /usr/bin/sudo -H -u test -- make test-spec
+      # make test-all
+      # - /usr/bin/sudo -H -u test -- make test-all
+      - ls -l /lib32 || true
+      - file ruby
+      - ldd ruby || true
+      - /usr/bin/sudo -H -u test -- make test-all TESTS="test/fiddle/test_import.rb"
+    # failure: ignore # `make test` is failing on arm32
+# trigger:
+#   branch:
+#     - master

.travis.yml

@@ -303,7 +303,8 @@ env:
       - |-
         tool/travis_retry.sh sudo -E apt-get $travis_apt_get_options install \
           ccache \
-          crossbuild-essential-armhf \
+          libc6-armhf-cross \
+          file \
           libc6:armhf \
           libstdc++-5-dev:armhf \
           libffi-dev:armhf \
@@ -318,6 +319,7 @@ env:
           libssl-dev:armhf \
           libssl1.0.0:armhf \
           linux-libc-dev:armhf \
+          strace \
           zlib1g-dev:armhf \
           zlib1g:armhf
 
@@ -512,7 +514,27 @@ before_script:
 script:
   # - $SETARCH make -s test -o showflags TESTOPTS="${TESTOPTS=$JOBS -q --tty=no}"
   # - travis_wait 50 $SETARCH make -s test-all -o exts TESTOPTS="${TESTOPTS} ${TEST_ALL_OPTS}" RUBYOPT="-w"
-  - $SETARCH make -s test-all -o exts TESTOPTS="$JOBS -v --tty=no" TESTS="../test/fiddle/test_import.rb" RUBYOPT="-w"
+
+  # Fiddle::DLError on arm32.
+  # - $SETARCH make -s test-all -o exts TESTOPTS="$JOBS -v --tty=no" TESTS="../test/fiddle/test_import.rb" RUBYOPT="-w"
+  # Fiddle::DLError on arm32.
+  # - $SETARCH make -s test-all -o exts TESTOPTS="-v --tty=no" TESTS="../test/fiddle/test_import.rb" RUBYOPT="-w"
+  - |
+    ldd "$(command -v uname)" || true
+  - $SETARCH file ruby
+  - ldd ruby || true
+  - $SETARCH ldd ruby || true
+  - strace -f ldd ruby || true
+  - strace -f $SETARCH ldd ruby || true
+  - |
+    (
+      set -x
+      ls -l /lib32 || true
+      # dpkg-query -L libc6
+      dpkg-query -L libc6:arm64
+      dpkg-query -L libc6:armhf
+      $SETARCH make -s test-all -o exts TESTOPTS="-v --tty=no" TESTS="../test/fiddle/test_import.rb" RUBYOPT="-w"
+    )
 
   # - $SETARCH make -s test-spec MSPECOPT=-ff # not using `-j` because sometimes `mspec -j` silently dies
   # - $SETARCH make -s -o showflags leaked-globals

test/fiddle/helper.rb

@@ -6,6 +6,8 @@
 
 libc_so = libm_so = nil
 
+p "[DEBUG] RUBY_PLATFORM: #{RUBY_PLATFORM}"
+
 case RUBY_PLATFORM
 when /cygwin/
   libc_so = "cygwin1.dll"
@@ -23,6 +25,7 @@
   when 4
     # 32-bit ruby
     libdir = '/lib32' if File.directory? '/lib32'
+    libdir = '/lib/arm-linux-gnueabihf' if File.directory? '/lib/arm-linux-gnueabihf'
   when 8
     # 64-bit ruby
     libdir = '/lib64' if File.directory? '/lib64'
@@ -95,7 +98,7 @@
   libc_so = ARGV[0] if ARGV[0] && ARGV[0][0] == ?/
   libm_so = ARGV[1] if ARGV[1] && ARGV[1][0] == ?/
   if( !(libc_so && libm_so) )
-    $stderr.puts("libc and libm not found: #{$0} <libc> <libm>")
+    $stderr.puts("libc or libm not found: #{$0} <libc> <libm>")
   end
 end
 
@@ -104,16 +107,26 @@
 
 if !libc_so || !libm_so
   ruby = EnvUtil.rubybin
+  p "[DEBUG] ruby: #{ruby}"
+  file_out = `file #{ruby}`
+  p "[DEBUG] file ruby result: #{file_out}"
   ldd = `ldd #{ruby}`
-  #puts ldd
+  p "[DEBUG] ldd ruby result: #{ldd}"
   libc_so = $& if !libc_so && %r{/\S*/libc\.so\S*} =~ ldd
   libm_so = $& if !libm_so && %r{/\S*/libm\.so\S*} =~ ldd
-  #p [libc_so, libm_so]
+  p [libc_so, libm_so]
+end
+
+if !libc_so || !libm_so
+  warn "libc or libm not found"
 end
 
 Fiddle::LIBC_SO = libc_so
 Fiddle::LIBM_SO = libm_so
 
+p "[DEBUG] Fiddle::LIBC_SO: #{Fiddle::LIBC_SO}"
+p "[DEBUG] Fiddle::LIBM_SO: #{Fiddle::LIBM_SO}"
+
 module Fiddle
   class TestCase < Test::Unit::TestCase
     def setup