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#!/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).
#
expected_abi_file="expected_abi"
actual_abi_file="actual_abi"
if [[ "$(uname)" == "Darwin" ]]; then
file_mask=*.dylib
nm_options="-g -U"
else
file_mask=*.so
nm_options="-D -g --defined-only"
fi
if [[ "$1" == "--generate" ]]; then
# IMPORTANT: we need a shared build of wxWidgets to proceed
if [[ $(echo $file_mask) == "$file_mask" ]]; then
echo "No shared objects ($file_mask) were found... aborting"
exit 1
fi
# generated the "expected ABI" for later comparison
rm -f $expected_abi_file
for library in $file_mask; do
# NOTE: don't use -C option as otherwise cut won't work correctly
nm $nm_options $library | cut -d ' ' -f 2,3 | sort >>$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 $file_mask) == "*$file_mask" ]]; then
echo "No shared objects ($file_mask) were found... aborting"
exit 1
fi
rm -f $actual_abi_file
for library in $file_mask; do
# NOTE: don't use -C option as otherwise cut won't work correctly
nm $nm_options $library | cut -d ' ' -f 2,3 | sort >>$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
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