Add API compatibility check tool

test/check-shared-library-abi-compatibility.sh

@@ -0,0 +1,58 @@
+#!/usr/bin/env bash
+CURRENT_COMMIT=$(git rev-parse HEAD)
+PREVIOUS_VERSION=$(git describe --tags --abbrev=0 $CURRENT_COMMIT)
+
+BUILD_DIR=_build_for_is_abi_compatible
+
+# Make the build directory
+rm -rf $BUILD_DIR
+mkdir -p $BUILD_DIR/new
+mkdir -p $BUILD_DIR/old
+
+cd $BUILD_DIR
+
+# Build the current commit
+cd new
+
+cmake \
+  -DCMAKE_BUILD_TYPE=Debug \
+  -DCMAKE_CXX_FLAGS="-g -Og" \
+  -DBUILD_SHARED_LIBS=ON \
+  -DHTTPLIB_COMPILE=ON \
+  -DCMAKE_INSTALL_PREFIX=./out \
+  ../../.. > /dev/null
+
+cmake --build . --target install > /dev/null
+cmake --build . --target clean > /dev/null
+
+cd ..
+
+# Build the nearest vesion
+cd old
+cmake \
+  -DCMAKE_BUILD_TYPE=Debug \
+  -DCMAKE_CXX_FLAGS="-g -Og" \
+  -DBUILD_SHARED_LIBS=ON \
+  -DHTTPLIB_COMPILE=ON \
+  -DCMAKE_INSTALL_PREFIX=./out \
+  ../../.. > /dev/null
+
+git checkout -q "${PREVIOUS_VERSION}"
+cmake --build . --target install > /dev/null
+cmake --build . --target clean > /dev/null
+
+cd ..
+
+# Checkout the original commit
+if [ "$CURRENT_COMMIT" = "$(git rev-parse master)" ]; then
+  git checkout -q  master
+else
+  git checkout -q "${CURRENT_COMMIT}"
+fi
+
+# ABI compatibility check
+../check-abi-compatibility.sh ./old/out/lib/libcpp-httplib.so ./new/out/lib/libcpp-httplib.so
+
+# Clean the build directory
+cd ..
+rm -rf $BUILD_DIR