1 files changed, 67 insertions, 0 deletions
diff --git a/src/secp256k1/tools/check-abi.sh b/src/secp256k1/tools/check-abi.sh
new file mode 100755
index 0000000000..55c945ac16
--- /dev/null
+++ b/src/secp256k1/tools/check-abi.sh
@@ -0,0 +1,67 @@
+#!/bin/sh
+
+set -eu
+
+default_base_version="$(git describe --match "v*.*.*" --abbrev=0)"
+default_new_version="HEAD"
+
+display_help_and_exit() {
+    echo "Usage: $0 [<base_ver> [<new_ver>]]"
+    echo ""
+    echo "Description: This script uses the ABI Compliance Checker tool to determine if the ABI"
+    echo "             of a new version of libsecp256k1 has changed in a backward-incompatible way."
+    echo ""
+    echo "Options:"
+    echo "  base_ver      Specify the base version as a git commit-ish"
+    echo "                  (default: most recent reachable tag matching \"v.*.*\", currently \"$default_base_version\")"
+    echo "  new_ver       Specify the new version as a git commit-ish"
+    echo "                  (default: $default_new_version)"
+    echo "  -h, --help    Display this help message"
+    exit 0
+}
+
+if [ "$#" -eq 0 ]; then
+    base_version="$default_base_version"
+    new_version="$default_new_version"
+elif [ "$#" -eq 1 ] && { [ "$1" = "-h" ] || [ "$1" = "--help" ]; }; then
+    display_help_and_exit
+elif [ "$#" -eq 1 ] || [ "$#" -eq 2 ]; then
+    base_version="$1"
+    if [ "$#" -eq 2 ]; then
+        new_version="$2"
+    fi
+else
+    echo "Invalid usage. See help:"
+    echo ""
+    display_help_and_exit
+fi
+
+checkout_and_build() {
+    _orig_dir="$(pwd)"
+    git worktree add --detach "$1" "$2"
+    cd "$1"
+    mkdir build && cd build
+    cmake -S .. --preset dev-mode \
+        -DCMAKE_C_COMPILER=gcc -DCMAKE_BUILD_TYPE=None -DCMAKE_C_FLAGS="-g -Og -gdwarf-4" \
+        -DSECP256K1_BUILD_BENCHMARK=OFF \
+        -DSECP256K1_BUILD_TESTS=OFF \
+        -DSECP256K1_BUILD_EXHAUSTIVE_TESTS=OFF \
+        -DSECP256K1_BUILD_CTIME_TESTS=OFF \
+        -DSECP256K1_BUILD_EXAMPLES=OFF
+    cmake --build . -j "$(nproc)"
+    abi-dumper src/libsecp256k1.so -o ABI.dump -lver "$2"
+    cd "$_orig_dir"
+}
+
+echo "Comparing $base_version (base version) to $new_version (new version)"
+echo
+
+base_source_dir="$(mktemp -d)"
+checkout_and_build "$base_source_dir" "$base_version"
+
+new_source_dir="$(mktemp -d)"
+checkout_and_build "$new_source_dir" "$new_version"
+
+abi-compliance-checker -lib libsecp256k1 -old "${base_source_dir}/build/ABI.dump" -new "${new_source_dir}/build/ABI.dump"
+git worktree remove "$base_source_dir"
+git worktree remove "$new_source_dir"