1 files changed, 163 insertions, 0 deletions
diff --git a/neozip/test/abicheck.sh b/neozip/test/abicheck.sh
new file mode 100755
index 0000000000..1656711f62
--- /dev/null
+++ b/neozip/test/abicheck.sh
@@ -0,0 +1,163 @@
+#!/bin/sh
+set -ex
+TESTDIR="$(cd $(dirname "$0"); pwd)"
+
+usage() {
+    cat <<_EOF_
+Usage: $0 [--zlib-compat][--refresh][--refresh-if]
+
+Build shared library with -ggdb, then compare its ABI to the stable
+ABI, and abort if differences found.
+
+Options:
+--zlib-compat  - check the ABI of the zlib-compatible flavor of zlib-ng.
+--refresh      - build the reference library and extract its ABI rather than using a stored ABI file.
+--refresh-if   - refresh only if ABI file not present.
+
+Obeys CHOST, CONFIGURE_ARGS, CFLAGS, and LDFLAGS.
+
+Requires libabigail (on Ubuntu, install package abigail-tools).
+_EOF_
+}
+
+# Print the multiarch tuple for the current (non-cross) machine,
+# or the empty string if unavailable.
+detect_chost() {
+    dpkg-architecture -qDEB_HOST_MULTIARCH ||
+     $CC -print-multiarch ||
+     $CC -print-search-dirs | sed 's/:/\n/g' | grep -E '^/lib/[^/]+$' | sed 's%.*/%%' ||
+     true
+}
+
+if ! test -f "configure"
+then
+  echo "Please run from top of source tree"
+  exit 1
+fi
+
+suffix="-ng"
+CONFIGURE_ARGS_NG="$CONFIGURE_ARGS"
+refresh=false
+refresh_if=false
+for arg
+do
+  case "$arg" in
+  --zlib-compat)
+    suffix=""
+    CONFIGURE_ARGS_NG="$CONFIGURE_ARGS_NG --zlib-compat"
+    ;;
+  --refresh)
+    refresh=true
+    ;;
+  --refresh-if)
+    refresh_if=true
+    ;;
+  --help)
+    usage
+    exit 0
+    ;;
+  *)
+    echo "Unknown arg '$arg'"
+    usage
+    exit 1
+    ;;
+  esac
+done
+
+# Choose reference repo and commit
+if test "$suffix" = ""
+then
+  # Reference is zlib 1.2.13.
+  ABI_GIT_REPO=https://github.com/madler/zlib.git
+  ABI_GIT_COMMIT=04f42ceca40f73e2978b50e93806c2a18c1281fc
+else
+  # Reference is most recent zlib-ng develop with zlib 1.2.12 compatible api.
+  ABI_GIT_REPO=https://github.com/zlib-ng/zlib-ng.git
+  ABI_GIT_COMMIT=e4614ebcb9b3e5b108dc983c155e4baf80882311
+fi
+
+# Test compat build for ABI compatibility with zlib
+if test "$CHOST" = ""
+then
+  # Note: don't export CHOST here, as we don't want configure seeing it
+  # when it's just the name for the build machine.
+  # Leave it as a plain shell variable, not an environment variable.
+  CHOST=$(detect_chost)
+  # Support -m32 for non-cross builds.
+  case "$CFLAGS" in
+  *-m32*) M32="-m32";;
+  *) M32="";;
+  esac
+fi
+
+# Canonicalize CHOST to work around bug in original zlib's configure
+# (Don't export it if it wasn't already exported, else may cause
+# default compiler detection failure and shared library link error
+# when building both zlib and zlib-ng.
+# See https://github.com/zlib-ng/zlib-ng/issues/1219)
+CHOST=$(sh $TESTDIR/../tools/config.sub $CHOST)
+
+if test "$CHOST" = ""
+then
+  echo "abicheck: SKIP, as we don't know CHOST"
+  exit 0
+fi
+
+ABIFILE="test/abi/zlib$suffix-$ABI_GIT_COMMIT-$CHOST$M32.abi"
+if ! $refresh && $refresh_if && ! test -f "$ABIFILE"
+then
+  refresh=true
+fi
+abidw --version
+
+if $refresh
+then
+  # Check out reference source
+  rm -rf btmp1
+  mkdir -p btmp1/src.d
+  cd btmp1/src.d
+  git init
+  git remote add origin $ABI_GIT_REPO
+  git fetch origin $ABI_GIT_COMMIT
+  git reset --hard FETCH_HEAD
+  cd ..
+  # Build unstripped, uninstalled, very debug shared library
+  CFLAGS="$CFLAGS -ggdb" src.d/configure $CONFIGURE_ARGS
+  make -j2
+  cd ..
+  # Find shared library, extract its abi
+  dylib1=$(find btmp1 -type f -name '*.dylib*' -print -o -type f -name '*.so.*' -print)
+  abidw $dylib1 > "$ABIFILE"
+  # Maintainers may wish to check $ABIFILE into git when a new
+  # target is added, or when a major release happens that is
+  # intended to change the ABI.  Alternately, this script could
+  # just always rebuild the reference source, and dispense with
+  # caching abi files in git (but that would slow builds down).
+fi
+
+if ! test -f "$ABIFILE"
+then
+  echo "abicheck: SKIP: $ABIFILE not found; rerun with --refresh or --refresh-if"
+  exit 1
+fi
+
+# Build unstripped, uninstalled, very debug shared library
+rm -rf btmp2
+mkdir btmp2
+cd btmp2
+CFLAGS="$CFLAGS -ggdb" ../configure $CONFIGURE_ARGS_NG
+make -j2
+cd ..
+# Find shared library, extract its abi
+dylib2=$(find btmp2 -type f -name '*.dylib*' -print -o -type f -name '*.so.*' -print)
+abidw $dylib2 > btmp2/zlib${suffix}-built.abi
+
+# Compare it to the reference
+# FIXME: use --no-added-syms for now, but we probably want to be more strict.
+if abidiff --no-added-syms --suppressions test/abi/ignore "$ABIFILE" btmp2/zlib${suffix}-built.abi
+then
+  echo "abicheck: PASS"
+else
+  echo "abicheck: FAIL"
+  exit 1
+fi