ceph/src/rocksdb/build_tools/build_detect_platform

   1 #!/usr/bin/env bash
   2 #
   3 # Detects OS we're compiling on and outputs a file specified by the first
   4 # argument, which in turn gets read while processing Makefile.
   5 #
   6 # The output will set the following variables:
   7 #   CC                          C Compiler path
   8 #   CXX                         C++ Compiler path
   9 #   PLATFORM_LDFLAGS            Linker flags
  10 #   JAVA_LDFLAGS                Linker flags for RocksDBJava
  11 #   JAVA_STATIC_LDFLAGS         Linker flags for RocksDBJava static build
  12 #   PLATFORM_SHARED_EXT         Extension for shared libraries
  13 #   PLATFORM_SHARED_LDFLAGS     Flags for building shared library
  14 #   PLATFORM_SHARED_CFLAGS      Flags for compiling objects for shared library
  15 #   PLATFORM_CCFLAGS            C compiler flags
  16 #   PLATFORM_CXXFLAGS           C++ compiler flags.  Will contain:
  17 #   PLATFORM_SHARED_VERSIONED   Set to 'true' if platform supports versioned
  18 #                               shared libraries, empty otherwise.
  19 #   FIND                        Command for the find utility
  20 #   WATCH                       Command for the watch utility
  21 #
  22 # The PLATFORM_CCFLAGS and PLATFORM_CXXFLAGS might include the following:
  23 #
  24 #       -DROCKSDB_PLATFORM_POSIX    if posix-platform based
  25 #       -DSNAPPY                    if the Snappy library is present
  26 #       -DLZ4                       if the LZ4 library is present
  27 #       -DZSTD                      if the ZSTD library is present
  28 #       -DNUMA                      if the NUMA library is present
  29 #       -DTBB                       if the TBB library is present
  30 #
  31 # Using gflags in rocksdb:
  32 # Our project depends on gflags, which requires users to take some extra steps
  33 # before they can compile the whole repository:
  34 #   1. Install gflags. You may download it from here:
  35 #      https://gflags.github.io/gflags/ (Mac users can `brew install gflags`)
  36 #   2. Once installed, add the include path for gflags to your CPATH env var and
  37 #      the lib path to LIBRARY_PATH. If installed with default settings, the lib
  38 #      will be /usr/local/lib and the include path will be /usr/local/include
  39
  40 OUTPUT=$1
  41 if test -z "$OUTPUT"; then
  42   echo "usage: $0 <output-filename>" >&2
  43   exit 1
  44 fi
  45
  46 # we depend on C++11
  47 PLATFORM_CXXFLAGS="-std=c++11"
  48 # we currently depend on POSIX platform
  49 COMMON_FLAGS="-DROCKSDB_PLATFORM_POSIX -DROCKSDB_LIB_IO_POSIX"
  50
  51 # Default to fbcode gcc on internal fb machines
  52 if [ -z "$ROCKSDB_NO_FBCODE" -a -d /mnt/gvfs/third-party ]; then
  53     FBCODE_BUILD="true"
  54     # If we're compiling with TSAN we need pic build
  55     PIC_BUILD=$COMPILE_WITH_TSAN
  56     if [ -n "$ROCKSDB_FBCODE_BUILD_WITH_481" ]; then
  57       # we need this to build with MySQL. Don't use for other purposes.
  58       source "$PWD/build_tools/fbcode_config4.8.1.sh"
  59     elif [ -n "$ROCKSDB_FBCODE_BUILD_WITH_PLATFORM007" ]; then
  60       source "$PWD/build_tools/fbcode_config_platform007.sh"
  61     else
  62       source "$PWD/build_tools/fbcode_config.sh"
  63     fi
  64 fi
  65
  66 # Delete existing output, if it exists
  67 rm -f "$OUTPUT"
  68 touch "$OUTPUT"
  69
  70 if test -z "$CC"; then
  71     if [ -x "$(command -v cc)" ]; then
  72         CC=cc
  73     elif [ -x "$(command -v clang)" ]; then
  74         CC=clang
  75     else
  76         CC=cc
  77     fi
  78 fi
  79
  80 if test -z "$CXX"; then
  81     if [ -x "$(command -v g++)" ]; then
  82         CXX=g++
  83     elif [ -x "$(command -v clang++)" ]; then
  84         CXX=clang++
  85     else
  86         CXX=g++
  87     fi
  88 fi
  89
  90 # Detect OS
  91 if test -z "$TARGET_OS"; then
  92     TARGET_OS=`uname -s`
  93 fi
  94
  95 if test -z "$TARGET_ARCHITECTURE"; then
  96     TARGET_ARCHITECTURE=`uname -m`
  97 fi
  98
  99 if test -z "$CLANG_SCAN_BUILD"; then
 100     CLANG_SCAN_BUILD=scan-build
 101 fi
 102
 103 if test -z "$CLANG_ANALYZER"; then
 104     CLANG_ANALYZER=$(command -v clang++ 2> /dev/null)
 105 fi
 106
 107 if test -z "$FIND"; then
 108     FIND=find
 109 fi
 110
 111 if test -z "$WATCH"; then
 112     WATCH=watch
 113 fi
 114
 115 COMMON_FLAGS="$COMMON_FLAGS ${CFLAGS}"
 116 CROSS_COMPILE=
 117 PLATFORM_CCFLAGS=
 118 PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS"
 119 PLATFORM_SHARED_EXT="so"
 120 PLATFORM_SHARED_LDFLAGS="-Wl,--no-as-needed -shared -Wl,-soname -Wl,"
 121 PLATFORM_SHARED_CFLAGS="-fPIC"
 122 PLATFORM_SHARED_VERSIONED=true
 123
 124 # generic port files (working on all platform by #ifdef) go directly in /port
 125 GENERIC_PORT_FILES=`cd "$ROCKSDB_ROOT"; find port -name '*.cc' | tr "\n" " "`
 126
 127 # On GCC, we pick libc's memcmp over GCC's memcmp via -fno-builtin-memcmp
 128 case "$TARGET_OS" in
 129     Darwin)
 130         PLATFORM=OS_MACOSX
 131         COMMON_FLAGS="$COMMON_FLAGS -DOS_MACOSX"
 132         PLATFORM_SHARED_EXT=dylib
 133         PLATFORM_SHARED_LDFLAGS="-dynamiclib -install_name "
 134         # PORT_FILES=port/darwin/darwin_specific.cc
 135         ;;
 136     IOS)
 137         PLATFORM=IOS
 138         COMMON_FLAGS="$COMMON_FLAGS -DOS_MACOSX -DIOS_CROSS_COMPILE -DROCKSDB_LITE"
 139         PLATFORM_SHARED_EXT=dylib
 140         PLATFORM_SHARED_LDFLAGS="-dynamiclib -install_name "
 141         CROSS_COMPILE=true
 142         PLATFORM_SHARED_VERSIONED=
 143         ;;
 144     Linux)
 145         PLATFORM=OS_LINUX
 146         COMMON_FLAGS="$COMMON_FLAGS -DOS_LINUX"
 147         if [ -z "$USE_CLANG" ]; then
 148             COMMON_FLAGS="$COMMON_FLAGS -fno-builtin-memcmp"
 149         else
 150             PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -latomic"
 151         fi
 152         PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -lpthread -lrt"
 153         # PORT_FILES=port/linux/linux_specific.cc
 154         ;;
 155     SunOS)
 156         PLATFORM=OS_SOLARIS
 157         COMMON_FLAGS="$COMMON_FLAGS -fno-builtin-memcmp -D_REENTRANT -DOS_SOLARIS -m64"
 158         PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -lpthread -lrt -static-libstdc++ -static-libgcc -m64"
 159         # PORT_FILES=port/sunos/sunos_specific.cc
 160         ;;
 161     AIX)
 162         PLATFORM=OS_AIX
 163         CC=gcc
 164         COMMON_FLAGS="$COMMON_FLAGS -maix64 -pthread -fno-builtin-memcmp -D_REENTRANT -DOS_AIX -D__STDC_FORMAT_MACROS"
 165         PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -pthread -lpthread -lrt -maix64 -static-libstdc++ -static-libgcc"
 166         # PORT_FILES=port/aix/aix_specific.cc
 167         ;;
 168     FreeBSD)
 169         PLATFORM=OS_FREEBSD
 170         CXX=clang++
 171         COMMON_FLAGS="$COMMON_FLAGS -fno-builtin-memcmp -D_REENTRANT -DOS_FREEBSD"
 172         PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -lpthread"
 173         # PORT_FILES=port/freebsd/freebsd_specific.cc
 174         ;;
 175     NetBSD)
 176         PLATFORM=OS_NETBSD
 177         COMMON_FLAGS="$COMMON_FLAGS -fno-builtin-memcmp -D_REENTRANT -DOS_NETBSD"
 178         PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -lpthread -lgcc_s"
 179         # PORT_FILES=port/netbsd/netbsd_specific.cc
 180         ;;
 181     OpenBSD)
 182         PLATFORM=OS_OPENBSD
 183         CXX=clang++
 184         COMMON_FLAGS="$COMMON_FLAGS -fno-builtin-memcmp -D_REENTRANT -DOS_OPENBSD"
 185         PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -pthread"
 186         # PORT_FILES=port/openbsd/openbsd_specific.cc
 187         FIND=gfind
 188         WATCH=gnuwatch
 189         ;;
 190     DragonFly)
 191         PLATFORM=OS_DRAGONFLYBSD
 192         COMMON_FLAGS="$COMMON_FLAGS -fno-builtin-memcmp -D_REENTRANT -DOS_DRAGONFLYBSD"
 193         PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -lpthread"
 194         # PORT_FILES=port/dragonfly/dragonfly_specific.cc
 195         ;;
 196     Cygwin)
 197         PLATFORM=CYGWIN
 198         PLATFORM_SHARED_CFLAGS=""
 199         PLATFORM_CXXFLAGS="-std=gnu++11"
 200         COMMON_FLAGS="$COMMON_FLAGS -DCYGWIN"
 201         if [ -z "$USE_CLANG" ]; then
 202             COMMON_FLAGS="$COMMON_FLAGS -fno-builtin-memcmp"
 203         else
 204             PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -latomic"
 205         fi
 206         PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -lpthread -lrt"
 207         # PORT_FILES=port/linux/linux_specific.cc
 208         ;;
 209     OS_ANDROID_CROSSCOMPILE)
 210         PLATFORM=OS_ANDROID
 211         COMMON_FLAGS="$COMMON_FLAGS -fno-builtin-memcmp -D_REENTRANT -DOS_ANDROID -DROCKSDB_PLATFORM_POSIX"
 212         PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS "  # All pthread features are in the Android C library
 213         # PORT_FILES=port/android/android.cc
 214         CROSS_COMPILE=true
 215         ;;
 216     *)
 217         echo "Unknown platform!" >&2
 218         exit 1
 219 esac
 220
 221 PLATFORM_CXXFLAGS="$PLATFORM_CXXFLAGS ${CXXFLAGS}"
 222 JAVA_LDFLAGS="$PLATFORM_LDFLAGS"
 223 JAVA_STATIC_LDFLAGS="$PLATFORM_LDFLAGS"
 224
 225 if [ "$CROSS_COMPILE" = "true" -o "$FBCODE_BUILD" = "true" ]; then
 226     # Cross-compiling; do not try any compilation tests.
 227     # Also don't need any compilation tests if compiling on fbcode
 228     true
 229 else
 230     if ! test $ROCKSDB_DISABLE_FALLOCATE; then
 231         # Test whether fallocate is available
 232         $CXX $CFLAGS -x c++ - -o /dev/null 2>/dev/null  <<EOF
 233           #include <fcntl.h>
 234           #include <linux/falloc.h>
 235           int main() {
 236       int fd = open("/dev/null", 0);
 237       fallocate(fd, FALLOC_FL_KEEP_SIZE, 0, 1024);
 238           }
 239 EOF
 240         if [ "$?" = 0 ]; then
 241             COMMON_FLAGS="$COMMON_FLAGS -DROCKSDB_FALLOCATE_PRESENT"
 242         fi
 243     fi
 244
 245     if ! test $ROCKSDB_DISABLE_SNAPPY; then
 246         # Test whether Snappy library is installed
 247         # http://code.google.com/p/snappy/
 248         $CXX $CFLAGS -x c++ - -o /dev/null 2>/dev/null  <<EOF
 249           #include <snappy.h>
 250           int main() {}
 251 EOF
 252         if [ "$?" = 0 ]; then
 253             COMMON_FLAGS="$COMMON_FLAGS -DSNAPPY"
 254             PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -lsnappy"
 255             JAVA_LDFLAGS="$JAVA_LDFLAGS -lsnappy"
 256         fi
 257     fi
 258
 259     if ! test $ROCKSDB_DISABLE_GFLAGS; then
 260         # Test whether gflags library is installed
 261         # http://gflags.github.io/gflags/
 262         # check if the namespace is gflags
 263         $CXX $CFLAGS -x c++ - -o /dev/null 2>/dev/null << EOF
 264           #include <gflags/gflags.h>
 265           int main() {}
 266 EOF
 267         if [ "$?" = 0 ]; then
 268             COMMON_FLAGS="$COMMON_FLAGS -DGFLAGS=1"
 269             PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -lgflags"
 270         else
 271           # check if namespace is google
 272           $CXX $CFLAGS -x c++ - -o /dev/null 2>/dev/null << EOF
 273             #include <gflags/gflags.h>
 274             using namespace google;
 275             int main() {}
 276 EOF
 277           if [ "$?" = 0 ]; then
 278               COMMON_FLAGS="$COMMON_FLAGS -DGFLAGS=google"
 279               PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -lgflags"
 280           fi
 281         fi
 282     fi
 283
 284     if ! test $ROCKSDB_DISABLE_ZLIB; then
 285         # Test whether zlib library is installed
 286         $CXX $CFLAGS $COMMON_FLAGS -x c++ - -o /dev/null 2>/dev/null  <<EOF
 287           #include <zlib.h>
 288           int main() {}
 289 EOF
 290         if [ "$?" = 0 ]; then
 291             COMMON_FLAGS="$COMMON_FLAGS -DZLIB"
 292             PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -lz"
 293             JAVA_LDFLAGS="$JAVA_LDFLAGS -lz"
 294         fi
 295     fi
 296
 297     if ! test $ROCKSDB_DISABLE_BZIP; then
 298         # Test whether bzip library is installed
 299         $CXX $CFLAGS $COMMON_FLAGS -x c++ - -o /dev/null 2>/dev/null  <<EOF
 300           #include <bzlib.h>
 301           int main() {}
 302 EOF
 303         if [ "$?" = 0 ]; then
 304             COMMON_FLAGS="$COMMON_FLAGS -DBZIP2"
 305             PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -lbz2"
 306             JAVA_LDFLAGS="$JAVA_LDFLAGS -lbz2"
 307         fi
 308     fi
 309
 310     if ! test $ROCKSDB_DISABLE_LZ4; then
 311         # Test whether lz4 library is installed
 312         $CXX $CFLAGS $COMMON_FLAGS -x c++ - -o /dev/null 2>/dev/null  <<EOF
 313           #include <lz4.h>
 314           #include <lz4hc.h>
 315           int main() {}
 316 EOF
 317         if [ "$?" = 0 ]; then
 318             COMMON_FLAGS="$COMMON_FLAGS -DLZ4"
 319             PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -llz4"
 320             JAVA_LDFLAGS="$JAVA_LDFLAGS -llz4"
 321         fi
 322     fi
 323
 324     if ! test $ROCKSDB_DISABLE_ZSTD; then
 325         # Test whether zstd library is installed
 326         $CXX $CFLAGS $COMMON_FLAGS -x c++ - -o /dev/null 2>/dev/null  <<EOF
 327           #include <zstd.h>
 328           int main() {}
 329 EOF
 330         if [ "$?" = 0 ]; then
 331             COMMON_FLAGS="$COMMON_FLAGS -DZSTD"
 332             PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -lzstd"
 333             JAVA_LDFLAGS="$JAVA_LDFLAGS -lzstd"
 334         fi
 335     fi
 336
 337     if ! test $ROCKSDB_DISABLE_NUMA; then
 338         # Test whether numa is available
 339         $CXX $CFLAGS -x c++ - -o /dev/null -lnuma 2>/dev/null  <<EOF
 340           #include <numa.h>
 341           #include <numaif.h>
 342           int main() {}
 343 EOF
 344         if [ "$?" = 0 ]; then
 345             COMMON_FLAGS="$COMMON_FLAGS -DNUMA"
 346             PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -lnuma"
 347             JAVA_LDFLAGS="$JAVA_LDFLAGS -lnuma"
 348         fi
 349     fi
 350
 351     if ! test $ROCKSDB_DISABLE_TBB; then
 352         # Test whether tbb is available
 353         $CXX $CFLAGS $LDFLAGS -x c++ - -o /dev/null -ltbb 2>/dev/null  <<EOF
 354           #include <tbb/tbb.h>
 355           int main() {}
 356 EOF
 357         if [ "$?" = 0 ]; then
 358             COMMON_FLAGS="$COMMON_FLAGS -DTBB"
 359             PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -ltbb"
 360             JAVA_LDFLAGS="$JAVA_LDFLAGS -ltbb"
 361         fi
 362     fi
 363
 364     if ! test $ROCKSDB_DISABLE_JEMALLOC; then
 365         # Test whether jemalloc is available
 366         if echo 'int main() {}' | $CXX $CFLAGS -x c++ - -o /dev/null -ljemalloc \
 367           2>/dev/null; then
 368             # This will enable some preprocessor identifiers in the Makefile
 369             JEMALLOC=1
 370             # JEMALLOC can be enabled either using the flag (like here) or by
 371             # providing direct link to the jemalloc library
 372             WITH_JEMALLOC_FLAG=1
 373             # check for JEMALLOC installed with HomeBrew
 374             if [ "$PLATFORM" == "OS_MACOSX" ]; then
 375                 if hash brew 2>/dev/null && brew ls --versions jemalloc > /dev/null; then
 376                     JEMALLOC_VER=$(brew ls --versions jemalloc | tail -n 1 | cut -f 2 -d ' ')
 377                     JEMALLOC_INCLUDE="-I/usr/local/Cellar/jemalloc/${JEMALLOC_VER}/include"
 378                     JEMALLOC_LIB="/usr/local/Cellar/jemalloc/${JEMALLOC_VER}/lib/libjemalloc_pic.a"
 379                     PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS $JEMALLOC_LIB"
 380                     JAVA_STATIC_LDFLAGS="$JAVA_STATIC_LDFLAGS $JEMALLOC_LIB"
 381                 fi
 382             fi
 383         fi
 384     fi
 385     if ! test $JEMALLOC && ! test $ROCKSDB_DISABLE_TCMALLOC; then
 386         # jemalloc is not available. Let's try tcmalloc
 387         if echo 'int main() {}' | $CXX $CFLAGS -x c++ - -o /dev/null \
 388           -ltcmalloc 2>/dev/null; then
 389             PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -ltcmalloc"
 390             JAVA_LDFLAGS="$JAVA_LDFLAGS -ltcmalloc"
 391         fi
 392     fi
 393
 394     if ! test $ROCKSDB_DISABLE_MALLOC_USABLE_SIZE; then
 395         # Test whether malloc_usable_size is available
 396         $CXX $CFLAGS -x c++ - -o /dev/null 2>/dev/null  <<EOF
 397           #include <malloc.h>
 398           int main() {
 399             size_t res = malloc_usable_size(0);
 400             return 0;
 401           }
 402 EOF
 403         if [ "$?" = 0 ]; then
 404             COMMON_FLAGS="$COMMON_FLAGS -DROCKSDB_MALLOC_USABLE_SIZE"
 405         fi
 406     fi
 407
 408     if ! test $ROCKSDB_DISABLE_PTHREAD_MUTEX_ADAPTIVE_NP; then
 409         # Test whether PTHREAD_MUTEX_ADAPTIVE_NP mutex type is available
 410         $CXX $CFLAGS -x c++ - -o /dev/null 2>/dev/null  <<EOF
 411           #include <pthread.h>
 412           int main() {
 413             int x = PTHREAD_MUTEX_ADAPTIVE_NP;
 414             return 0;
 415           }
 416 EOF
 417         if [ "$?" = 0 ]; then
 418             COMMON_FLAGS="$COMMON_FLAGS -DROCKSDB_PTHREAD_ADAPTIVE_MUTEX"
 419         fi
 420     fi
 421
 422     if ! test $ROCKSDB_DISABLE_BACKTRACE; then
 423         # Test whether backtrace is available
 424         $CXX $CFLAGS -x c++ - -o /dev/null 2>/dev/null  <<EOF
 425           #include <execinfo.h>>
 426           int main() {
 427             void* frames[1];
 428             backtrace_symbols(frames, backtrace(frames, 1));
 429             return 0;
 430           }
 431 EOF
 432         if [ "$?" = 0 ]; then
 433             COMMON_FLAGS="$COMMON_FLAGS -DROCKSDB_BACKTRACE"
 434         else
 435             # Test whether execinfo library is installed
 436             $CXX $CFLAGS -lexecinfo -x c++ - -o /dev/null 2>/dev/null  <<EOF
 437               #include <execinfo.h>
 438               int main() {
 439                 void* frames[1];
 440                 backtrace_symbols(frames, backtrace(frames, 1));
 441               }
 442 EOF
 443             if [ "$?" = 0 ]; then
 444                 COMMON_FLAGS="$COMMON_FLAGS -DROCKSDB_BACKTRACE"
 445                 PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -lexecinfo"
 446                 JAVA_LDFLAGS="$JAVA_LDFLAGS -lexecinfo"
 447             fi
 448         fi
 449     fi
 450
 451     if ! test $ROCKSDB_DISABLE_PG; then
 452         # Test if -pg is supported
 453         $CXX $CFLAGS -pg -x c++ - -o /dev/null 2>/dev/null  <<EOF
 454           int main() {
 455             return 0;
 456           }
 457 EOF
 458         if [ "$?" = 0 ]; then
 459             PROFILING_FLAGS=-pg
 460         fi
 461     fi
 462
 463     if ! test $ROCKSDB_DISABLE_SYNC_FILE_RANGE; then
 464         # Test whether sync_file_range is supported for compatibility with an old glibc
 465         $CXX $CFLAGS -x c++ - -o /dev/null 2>/dev/null  <<EOF
 466           #include <fcntl.h>
 467           int main() {
 468             int fd = open("/dev/null", 0);
 469             sync_file_range(fd, 0, 1024, SYNC_FILE_RANGE_WRITE);
 470           }
 471 EOF
 472         if [ "$?" = 0 ]; then
 473             COMMON_FLAGS="$COMMON_FLAGS -DROCKSDB_RANGESYNC_PRESENT"
 474         fi
 475     fi
 476
 477     if ! test $ROCKSDB_DISABLE_SCHED_GETCPU; then
 478         # Test whether sched_getcpu is supported
 479         $CXX $CFLAGS -x c++ - -o /dev/null 2>/dev/null  <<EOF
 480           #include <sched.h>
 481           int main() {
 482             int cpuid = sched_getcpu();
 483           }
 484 EOF
 485         if [ "$?" = 0 ]; then
 486             COMMON_FLAGS="$COMMON_FLAGS -DROCKSDB_SCHED_GETCPU_PRESENT"
 487         fi
 488     fi
 489
 490     if ! test $ROCKSDB_DISABLE_ALIGNED_NEW; then
 491         # Test whether c++17 aligned-new is supported
 492         $CXX $PLATFORM_CXXFLAGS -faligned-new -x c++ - -o /dev/null 2>/dev/null <<EOF
 493             struct alignas(1024) t {int a;};
 494             int main() {}
 495 EOF
 496         if [ "$?" = 0 ]; then
 497             PLATFORM_CXXFLAGS="$PLATFORM_CXXFLAGS -faligned-new -DHAVE_ALIGNED_NEW"
 498         fi
 499     fi
 500 fi
 501
 502 # TODO(tec): Fix -Wshorten-64-to-32 errors on FreeBSD and enable the warning.
 503 # -Wshorten-64-to-32 breaks compilation on FreeBSD i386
 504 if ! [ "$TARGET_OS" = FreeBSD -a "$TARGET_ARCHITECTURE" = i386 ]; then
 505   # Test whether -Wshorten-64-to-32 is available
 506   $CXX $CFLAGS -x c++ - -o /dev/null -Wshorten-64-to-32 2>/dev/null  <<EOF
 507     int main() {}
 508 EOF
 509   if [ "$?" = 0 ]; then
 510     COMMON_FLAGS="$COMMON_FLAGS -Wshorten-64-to-32"
 511   fi
 512 fi
 513
 514 # shall we use HDFS?
 515
 516 if test "$USE_HDFS"; then
 517   if test -z "$JAVA_HOME"; then
 518     echo "JAVA_HOME has to be set for HDFS usage."
 519     exit 1
 520   fi
 521   HDFS_CCFLAGS="$HDFS_CCFLAGS -I$JAVA_HOME/include -I$JAVA_HOME/include/linux -DUSE_HDFS -I$HADOOP_HOME/include"
 522   HDFS_LDFLAGS="$HDFS_LDFLAGS -lhdfs -L$JAVA_HOME/jre/lib/amd64 -L$HADOOP_HOME/lib/native"
 523   HDFS_LDFLAGS="$HDFS_LDFLAGS -L$JAVA_HOME/jre/lib/amd64/server -L$GLIBC_RUNTIME_PATH/lib"
 524   HDFS_LDFLAGS="$HDFS_LDFLAGS -ldl -lverify -ljava -ljvm"
 525   COMMON_FLAGS="$COMMON_FLAGS $HDFS_CCFLAGS"
 526   PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS $HDFS_LDFLAGS"
 527   JAVA_LDFLAGS="$JAVA_LDFLAGS $HDFS_LDFLAGS"
 528 fi
 529
 530 if test -z "$PORTABLE"; then
 531   if test -n "`echo $TARGET_ARCHITECTURE | grep ^ppc64`"; then
 532     # Tune for this POWER processor, treating '+' models as base models
 533     POWER=`LD_SHOW_AUXV=1 /bin/true | grep AT_PLATFORM | grep -E -o power[0-9]+`
 534     COMMON_FLAGS="$COMMON_FLAGS -mcpu=$POWER -mtune=$POWER "
 535   elif test -n "`echo $TARGET_ARCHITECTURE | grep ^s390x`"; then
 536     COMMON_FLAGS="$COMMON_FLAGS -march=z10 "
 537   elif test -n "`echo $TARGET_ARCHITECTURE | grep ^arm`"; then
 538     # TODO: Handle this with approprite options.
 539     COMMON_FLAGS="$COMMON_FLAGS"
 540   elif [ "$TARGET_OS" == "IOS" ]; then
 541     COMMON_FLAGS="$COMMON_FLAGS"
 542   elif [ "$TARGET_OS" != "AIX" ] && [ "$TARGET_OS" != "SunOS" ]; then
 543     COMMON_FLAGS="$COMMON_FLAGS -march=native "
 544   elif test "$USE_SSE"; then
 545     COMMON_FLAGS="$COMMON_FLAGS -msse4.2 -mpclmul"
 546   fi
 547 elif test "$USE_SSE"; then
 548   COMMON_FLAGS="$COMMON_FLAGS -msse4.2 -mpclmul"
 549 fi
 550
 551 $CXX $PLATFORM_CXXFLAGS $COMMON_FLAGS -x c++ - -o /dev/null 2>/dev/null <<EOF
 552   #include <cstdint>
 553   #include <nmmintrin.h>
 554   int main() {
 555     volatile uint32_t x = _mm_crc32_u32(0, 0);
 556   }
 557 EOF
 558 if [ "$?" = 0 ]; then
 559   COMMON_FLAGS="$COMMON_FLAGS -DHAVE_SSE42"
 560 elif test "$USE_SSE"; then
 561   echo "warning: USE_SSE specified but compiler could not use SSE intrinsics, disabling"
 562   exit 1
 563 fi
 564
 565 $CXX $PLATFORM_CXXFLAGS $COMMON_FLAGS -x c++ - -o /dev/null 2>/dev/null <<EOF
 566   #include <cstdint>
 567   #include <wmmintrin.h>
 568   int main() {
 569     const auto a = _mm_set_epi64x(0, 0);
 570     const auto b = _mm_set_epi64x(0, 0);
 571     const auto c = _mm_clmulepi64_si128(a, b, 0x00);
 572     auto d = _mm_cvtsi128_si64(c);
 573   }
 574 EOF
 575 if [ "$?" = 0 ]; then
 576   COMMON_FLAGS="$COMMON_FLAGS -DHAVE_PCLMUL"
 577 elif test "$USE_SSE"; then
 578   echo "warning: USE_SSE specified but compiler could not use PCLMUL intrinsics, disabling"
 579   exit 1
 580 fi
 581
 582 # iOS doesn't support thread-local storage, but this check would erroneously
 583 # succeed because the cross-compiler flags are added by the Makefile, not this
 584 # script.
 585 if [ "$PLATFORM" != IOS ]; then
 586   $CXX $COMMON_FLAGS -x c++ - -o /dev/null 2>/dev/null <<EOF
 587   #if defined(_MSC_VER) && !defined(__thread)
 588   #define __thread __declspec(thread)
 589   #endif
 590   int main() {
 591     static __thread int tls;
 592   }
 593 EOF
 594   if [ "$?" = 0 ]; then
 595     COMMON_FLAGS="$COMMON_FLAGS -DROCKSDB_SUPPORT_THREAD_LOCAL"
 596   fi
 597 fi
 598
 599 PLATFORM_CCFLAGS="$PLATFORM_CCFLAGS $COMMON_FLAGS"
 600 PLATFORM_CXXFLAGS="$PLATFORM_CXXFLAGS $COMMON_FLAGS"
 601
 602 VALGRIND_VER="$VALGRIND_VER"
 603
 604 ROCKSDB_MAJOR=`build_tools/version.sh major`
 605 ROCKSDB_MINOR=`build_tools/version.sh minor`
 606 ROCKSDB_PATCH=`build_tools/version.sh patch`
 607
 608 echo "CC=$CC" >> "$OUTPUT"
 609 echo "CXX=$CXX" >> "$OUTPUT"
 610 echo "PLATFORM=$PLATFORM" >> "$OUTPUT"
 611 echo "PLATFORM_LDFLAGS=$PLATFORM_LDFLAGS" >> "$OUTPUT"
 612 echo "JAVA_LDFLAGS=$JAVA_LDFLAGS" >> "$OUTPUT"
 613 echo "JAVA_STATIC_LDFLAGS=$JAVA_STATIC_LDFLAGS" >> "$OUTPUT"
 614 echo "VALGRIND_VER=$VALGRIND_VER" >> "$OUTPUT"
 615 echo "PLATFORM_CCFLAGS=$PLATFORM_CCFLAGS" >> "$OUTPUT"
 616 echo "PLATFORM_CXXFLAGS=$PLATFORM_CXXFLAGS" >> "$OUTPUT"
 617 echo "PLATFORM_SHARED_CFLAGS=$PLATFORM_SHARED_CFLAGS" >> "$OUTPUT"
 618 echo "PLATFORM_SHARED_EXT=$PLATFORM_SHARED_EXT" >> "$OUTPUT"
 619 echo "PLATFORM_SHARED_LDFLAGS=$PLATFORM_SHARED_LDFLAGS" >> "$OUTPUT"
 620 echo "PLATFORM_SHARED_VERSIONED=$PLATFORM_SHARED_VERSIONED" >> "$OUTPUT"
 621 echo "EXEC_LDFLAGS=$EXEC_LDFLAGS" >> "$OUTPUT"
 622 echo "JEMALLOC_INCLUDE=$JEMALLOC_INCLUDE" >> "$OUTPUT"
 623 echo "JEMALLOC_LIB=$JEMALLOC_LIB" >> "$OUTPUT"
 624 echo "ROCKSDB_MAJOR=$ROCKSDB_MAJOR" >> "$OUTPUT"
 625 echo "ROCKSDB_MINOR=$ROCKSDB_MINOR" >> "$OUTPUT"
 626 echo "ROCKSDB_PATCH=$ROCKSDB_PATCH" >> "$OUTPUT"
 627 echo "CLANG_SCAN_BUILD=$CLANG_SCAN_BUILD" >> "$OUTPUT"
 628 echo "CLANG_ANALYZER=$CLANG_ANALYZER" >> "$OUTPUT"
 629 echo "PROFILING_FLAGS=$PROFILING_FLAGS" >> "$OUTPUT"
 630 echo "FIND=$FIND" >> "$OUTPUT"
 631 echo "WATCH=$WATCH" >> "$OUTPUT"
 632 # This will enable some related identifiers for the preprocessor
 633 if test -n "$JEMALLOC"; then
 634   echo "JEMALLOC=1" >> "$OUTPUT"
 635 fi
 636 # Indicates that jemalloc should be enabled using -ljemalloc flag
 637 # The alternative is to porvide a direct link to the library via JEMALLOC_LIB
 638 # and JEMALLOC_INCLUDE
 639 if test -n "$WITH_JEMALLOC_FLAG"; then
 640   echo "WITH_JEMALLOC_FLAG=$WITH_JEMALLOC_FLAG" >> "$OUTPUT"
 641 fi
 642 echo "LUA_PATH=$LUA_PATH" >> "$OUTPUT"