rocksdb添加java API，修复c++动态库使用ldd查询显示未定义符号问题

Signed-off-by: He Rengui <herengui@uniontech.com>

rocksdb.spec

@@ -1,12 +1,12 @@
 Name:          rocksdb
 Version:       6.8.1
-Release:       1
+Release:       2
 Summary:       A Persistent Key-Value Store for Flash and RAM Storage
  
 License:       GPLv2 and Apache 2.0 License
 URL:           https://github.com/facebook/rocksdb.git
  
-BuildRequires: gcc make rpm-build gcc-c++ gtest-devel
+BuildRequires: gcc make rpm-build gcc-c++ gtest-devel maven java-1.8.0-openjdk-devel
 
 # enable debuginfo pacakges by default, then we need gdb package
 BuildRequires: gdb
@@ -34,7 +34,15 @@ Requires:      %{name}%{?_isa} = %{version}-%{release}
 %description devel
 Development files for rocksdb
  
- 
+%package -n %{name}jni
+Summary:       A Java JNI driver to rocksdb
+# rocksdbjni.jar contains a shared object, that requires some packages
+Requires:      java-1.8.0-openjdk glibc snappy zlib bzip2 lz4 zstd libstdc++ 
+
+%description -n %{name}jni
+RocksDB JNI gives you a Java interface to the RocksDB C++ library which is an
+embeddable persistent key-value store for fast storage.
+
 %prep
 %autosetup
 
@@ -44,15 +52,26 @@ rm build_tools/gnu_parallel
  
 %build
 export CFLAGS="%{optflags}"
-export EXTRA_CXXFLAGS=" -std=c++11 %{optflags}"
-make %{?_smp_mflags} shared_lib
+# librocksdb*.so* has undefined symbols dlopen and so on, “-ldl” needs to be added here
+export EXTRA_CXXFLAGS=" -std=c++11 %{optflags} -ldl"
+%make_build shared_lib
+# build rocksdbjni
+export JAVA_HOME=%{_jvmdir}/java-1.8.0-openjdk
+export EXTRA_CXXFLAGS="${EXTRA_CXXFLAGS} -I${JAVA_HOME}/include/ -I${JAVA_HOME}/include/linux"
+sed -i 's#\(^DEBUG_LEVEL.*=\).*$#\10#' Makefile
+PORTABLE=1 %make_build rocksdbjava
  
 %install
 make install-shared \
          INSTALL_PREFIX=%{buildroot}\
          LIB_INSTALL_DIR=%{_libdir}\
          INCLUDE_INSTALL_DIR=%{_includedir}
- 
+
+# install rocksdbjni
+install -d -p -m 0755 %{buildroot}%{_javadir}/%{name}jni
+install -D -m 0644 java/target/%{name}jni-%{version}-linux$(getconf LONG_BIT).jar \
+    %{buildroot}%{_javadir}/%{name}jni/%{name}jni.jar
+
 %post -p /sbin/ldconfig
 %postun -p /sbin/ldconfig
  
@@ -68,6 +87,14 @@ make install-shared \
 %{_libdir}/librocksdb.so
 %{_includedir}/*
  
+%files -n %{name}jni
+%dir %{_javadir}/%{name}jni
+%{_javadir}/%{name}jni/%{name}jni.jar
+
 %changelog
+* Thu May 06 2021 herengui <herengui@uniontech.com> - 6.8.1-2
+- add java-api: rocksdbjni
+- fix undefined symbol issue for c++ API
+
 * Thu May 28 2020 openEuler Buildteam <buildteam@openeuler.org> - 6.8.1-1
 - Package init