backport of r58600

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@58601 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

lib/abicheck.sh

@@ -0,0 +1,77 @@
+#!/bin/bash
+
+# Script originally based on GTK+'s own abicheck.sh; it should be run anytime
+# there is a change in the stable branch of wxWidgets which could lead to an
+# ABI breakage and thus result in a binary-incompatible change (see tech docs).
+#
+# $Id$
+
+
+expected_abi_file="expected_abi"
+actual_abi_file="actual_abi"
+
+if [[ "$1" == "--generate" ]]; then
+
+    # IMPORTANT: we need a shared build of wxWidgets to proceed
+    if [[ $(echo *.so) == "*.so" ]]; then
+        echo "No shared objects (*.so) were found... aborting"
+        exit 1
+    fi
+
+    # generated the "expected ABI" for later comparison
+    rm -f $expected_abi_file
+    for library in *.so; do
+        # NOTE: don't use -C option as otherwise cut won't work correctly
+        nm -D -g --defined-only $library | cut -d ' ' -f 3 | sort >>$expected_abi_file
+    done
+
+    echo "Expected wxWidgets ABI generated in \"$expected_abi_file\"..."
+
+elif [[ -z "$1" ]]; then
+
+    if [[ ! -f "$expected_abi_file" ]]; then
+        echo "The file containing the expected wxWidgets ABI '$expected_abi_file' does not exist!"
+        echo "Please generate it first using the '--generate' option"
+        exit 1
+    fi
+
+    echo "Comparing actual ABI with the expected ABI (loading it from \"$expected_abi_file\")..."
+
+    # IMPORTANT: we need a shared build of wxWidgets to do the check
+    if [[ $(echo *.so) == "*.so" ]]; then
+        echo "No shared objects (*.so) were found... aborting"
+        exit 1
+    fi
+
+    rm -f $actual_abi_file
+    for library in *.so; do
+        # NOTE: don't use -C option as otherwise cut won't work correctly
+        nm -D -g --defined-only $library | cut -d ' ' -f 3 | sort >>$actual_abi_file
+    done
+
+    result=`diff -u $expected_abi_file $actual_abi_file`
+
+    if [[ -z "$result" ]]; then
+        echo "No binary (in)compatible changes were found."
+    else
+        echo "========================================================="
+        echo "WARNING: Possible binary-incompatible changes were found:"
+        echo "========================================================="
+        echo
+        echo "$result"
+
+        # this doesn't necessarly indicate that binary compatibility was surely
+        # broken; e.g. adding non-virtual methods will generate a new line in the
+        # $actual_abi_file but that's a compatible change.
+    fi
+
+else
+
+    echo "Usage: $0 [--generate]"
+    echo "When running without options, compares the wxWidgets ABI saved in '$expected_abi_file'"
+    echo "with the current ABI of the .so files of the working directory."
+    echo "When --generate is given, saves in '$expected_abi_file' the ABI of the .so files"
+    echo "(for later comparisons)."
+
+fi
+