Add tools/check-abi.sh

Author: hebasto

tools/check-abi.sh

@@ -0,0 +1,32 @@
+#!/bin/sh
+
+set -eux
+
+configure_and_build() {
+    cmake -S "$1" --preset dev-mode \
+        -DCMAKE_C_COMPILER=gcc -DCMAKE_BUILD_TYPE=None -DCMAKE_C_FLAGS="-g -Og -gdwarf-4" \
+        -DSECP256K1_BUILD_BENCHMARK=OFF \
+        -DSECP256K1_BUILD_TESTS=OFF \
+        -DSECP256K1_BUILD_EXHAUSTIVE_TESTS=OFF \
+        -DSECP256K1_BUILD_CTIME_TESTS=OFF \
+        -DSECP256K1_BUILD_EXAMPLES=OFF
+    cmake --build . -j "$(nproc)"
+}
+
+source_dir=$(pwd)
+
+git checkout "$1"
+base_build_dir=$(mktemp -d)
+cd "$base_build_dir"
+configure_and_build "$source_dir"
+abi-dumper src/libsecp256k1.so -o ABI.dump -lver "$1"
+cd "$source_dir"
+
+git checkout "$2"
+current_build_dir=$(mktemp -d)
+cd "$current_build_dir"
+configure_and_build "$source_dir"
+abi-dumper src/libsecp256k1.so -o ABI.dump -lver "$2"
+cd "$source_dir"
+
+abi-compliance-checker -lib libsecp256k1 -old "${base_build_dir}/ABI.dump" -new "${current_build_dir}/ABI.dump"