| #!/bin/sh |
| # |
| # Detects OS we're compiling on and outputs a file specified by the first |
| # argument, which in turn gets read while processing Makefile. |
| # |
| # The output will set the following variables: |
| # CC C Compiler path |
| # CXX C++ Compiler path |
| # PLATFORM_LDFLAGS Linker flags |
| # PLATFORM_LIBS Libraries flags |
| # PLATFORM_SHARED_EXT Extension for shared libraries |
| # PLATFORM_SHARED_LDFLAGS Flags for building shared library |
| # This flag is embedded just before the name |
| # of the shared library without intervening spaces |
| # PLATFORM_SHARED_CFLAGS Flags for compiling objects for shared library |
| # PLATFORM_CCFLAGS C compiler flags |
| # PLATFORM_CXXFLAGS C++ compiler flags. Will contain: |
| # PLATFORM_SHARED_VERSIONED Set to 'true' if platform supports versioned |
| # shared libraries, empty otherwise. |
| # |
| # The PLATFORM_CCFLAGS and PLATFORM_CXXFLAGS might include the following: |
| # |
| # -DLEVELDB_ATOMIC_PRESENT if <atomic> is present |
| # -DLEVELDB_PLATFORM_POSIX for Posix-based platforms |
| # -DSNAPPY if the Snappy library is present |
| # |
| |
| OUTPUT=$1 |
| PREFIX=$2 |
| if test -z "$OUTPUT" || test -z "$PREFIX"; then |
| echo "usage: $0 <output-filename> <directory_prefix>" >&2 |
| exit 1 |
| fi |
| |
| # Delete existing output, if it exists |
| rm -f $OUTPUT |
| touch $OUTPUT |
| |
| if test -z "$CC"; then |
| CC=cc |
| fi |
| |
| if test -z "$CXX"; then |
| CXX=g++ |
| fi |
| |
| if test -z "$TMPDIR"; then |
| TMPDIR=/tmp |
| fi |
| |
| # Detect OS |
| if test -z "$TARGET_OS"; then |
| TARGET_OS=`uname -s` |
| fi |
| |
| COMMON_FLAGS= |
| CROSS_COMPILE= |
| PLATFORM_CCFLAGS= |
| PLATFORM_CXXFLAGS= |
| PLATFORM_LDFLAGS= |
| PLATFORM_LIBS= |
| PLATFORM_SHARED_EXT="so" |
| PLATFORM_SHARED_LDFLAGS="-shared -Wl,-soname -Wl," |
| PLATFORM_SHARED_CFLAGS="-fPIC" |
| PLATFORM_SHARED_VERSIONED=true |
| |
| MEMCMP_FLAG= |
| if [ "$CXX" = "g++" ]; then |
| # Use libc's memcmp instead of GCC's memcmp. This results in ~40% |
| # performance improvement on readrandom under gcc 4.4.3 on Linux/x86. |
| MEMCMP_FLAG="-fno-builtin-memcmp" |
| fi |
| |
| case "$TARGET_OS" in |
| CYGWIN_*) |
| PLATFORM=OS_LINUX |
| COMMON_FLAGS="$MEMCMP_FLAG -lpthread -DOS_LINUX -DCYGWIN" |
| PLATFORM_LDFLAGS="-lpthread" |
| PORT_FILE=port/port_posix.cc |
| ;; |
| Darwin) |
| PLATFORM=OS_MACOSX |
| COMMON_FLAGS="$MEMCMP_FLAG -DOS_MACOSX" |
| PLATFORM_SHARED_EXT=dylib |
| PLATFORM_SHARED_LDFLAGS="-dynamiclib -install_name " |
| PORT_FILE=port/port_posix.cc |
| ;; |
| Linux) |
| PLATFORM=OS_LINUX |
| COMMON_FLAGS="$MEMCMP_FLAG -pthread -DOS_LINUX" |
| PLATFORM_LDFLAGS="-pthread" |
| PORT_FILE=port/port_posix.cc |
| ;; |
| SunOS) |
| PLATFORM=OS_SOLARIS |
| COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_SOLARIS" |
| PLATFORM_LIBS="-lpthread -lrt" |
| PORT_FILE=port/port_posix.cc |
| ;; |
| FreeBSD) |
| PLATFORM=OS_FREEBSD |
| COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_FREEBSD" |
| PLATFORM_LIBS="-lpthread" |
| PORT_FILE=port/port_posix.cc |
| ;; |
| NetBSD) |
| PLATFORM=OS_NETBSD |
| COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_NETBSD" |
| PLATFORM_LIBS="-lpthread -lgcc_s" |
| PORT_FILE=port/port_posix.cc |
| ;; |
| OpenBSD) |
| PLATFORM=OS_OPENBSD |
| COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_OPENBSD" |
| PLATFORM_LDFLAGS="-pthread" |
| PORT_FILE=port/port_posix.cc |
| ;; |
| DragonFly) |
| PLATFORM=OS_DRAGONFLYBSD |
| COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_DRAGONFLYBSD" |
| PLATFORM_LIBS="-lpthread" |
| PORT_FILE=port/port_posix.cc |
| ;; |
| OS_ANDROID_CROSSCOMPILE) |
| PLATFORM=OS_ANDROID |
| COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_ANDROID -DLEVELDB_PLATFORM_POSIX" |
| PLATFORM_LDFLAGS="" # All pthread features are in the Android C library |
| PORT_FILE=port/port_posix.cc |
| CROSS_COMPILE=true |
| ;; |
| HP-UX) |
| PLATFORM=OS_HPUX |
| COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_HPUX" |
| PLATFORM_LDFLAGS="-pthread" |
| PORT_FILE=port/port_posix.cc |
| # man ld: +h internal_name |
| PLATFORM_SHARED_LDFLAGS="-shared -Wl,+h -Wl," |
| ;; |
| IOS) |
| PLATFORM=IOS |
| COMMON_FLAGS="$MEMCMP_FLAG -DOS_MACOSX" |
| PORT_FILE=port/port_posix.cc |
| PLATFORM_SHARED_EXT= |
| PLATFORM_SHARED_LDFLAGS= |
| PLATFORM_SHARED_CFLAGS= |
| PLATFORM_SHARED_VERSIONED= |
| ;; |
| *) |
| echo "Unknown platform!" >&2 |
| exit 1 |
| esac |
| |
| # We want to make a list of all cc files within util, db, table, and helpers |
| # except for the test and benchmark files. By default, find will output a list |
| # of all files matching either rule, so we need to append -print to make the |
| # prune take effect. |
| DIRS="$PREFIX/db $PREFIX/util $PREFIX/table" |
| |
| set -f # temporarily disable globbing so that our patterns aren't expanded |
| PRUNE_TEST="-name *test*.cc -prune" |
| PRUNE_BENCH="-name *_bench.cc -prune" |
| PRUNE_TOOL="-name leveldb_main.cc -prune" |
| PORTABLE_FILES=`find $DIRS $PRUNE_TEST -o $PRUNE_BENCH -o $PRUNE_TOOL -o -name '*.cc' -print | sort | sed "s,^$PREFIX/,," | tr "\n" " "` |
| |
| set +f # re-enable globbing |
| |
| # The sources consist of the portable files, plus the platform-specific port |
| # file. |
| echo "SOURCES=$PORTABLE_FILES $PORT_FILE" >> $OUTPUT |
| echo "MEMENV_SOURCES=helpers/memenv/memenv.cc" >> $OUTPUT |
| |
| if [ "$CROSS_COMPILE" = "true" ]; then |
| # Cross-compiling; do not try any compilation tests. |
| true |
| else |
| CXXOUTPUT="${TMPDIR}/leveldb_build_detect_platform-cxx.$$" |
| |
| # If -std=c++0x works, use <atomic> as fallback for when memory barriers |
| # are not available. |
| $CXX $CXXFLAGS -std=c++0x -x c++ - -o $CXXOUTPUT 2>/dev/null <<EOF |
| #include <atomic> |
| int main() {} |
| EOF |
| if [ "$?" = 0 ]; then |
| COMMON_FLAGS="$COMMON_FLAGS -DLEVELDB_PLATFORM_POSIX -DLEVELDB_ATOMIC_PRESENT" |
| PLATFORM_CXXFLAGS="-std=c++0x" |
| else |
| COMMON_FLAGS="$COMMON_FLAGS -DLEVELDB_PLATFORM_POSIX" |
| fi |
| |
| # Test whether Snappy library is installed |
| # http://code.google.com/p/snappy/ |
| $CXX $CXXFLAGS -x c++ - -o $CXXOUTPUT 2>/dev/null <<EOF |
| #include <snappy.h> |
| int main() {} |
| EOF |
| if [ "$?" = 0 ]; then |
| COMMON_FLAGS="$COMMON_FLAGS -DSNAPPY" |
| PLATFORM_LIBS="$PLATFORM_LIBS -lsnappy" |
| fi |
| |
| # Test whether tcmalloc is available |
| $CXX $CXXFLAGS -x c++ - -o $CXXOUTPUT -ltcmalloc 2>/dev/null <<EOF |
| int main() {} |
| EOF |
| if [ "$?" = 0 ]; then |
| PLATFORM_LIBS="$PLATFORM_LIBS -ltcmalloc" |
| fi |
| |
| rm -f $CXXOUTPUT 2>/dev/null |
| fi |
| |
| PLATFORM_CCFLAGS="$PLATFORM_CCFLAGS $COMMON_FLAGS" |
| PLATFORM_CXXFLAGS="$PLATFORM_CXXFLAGS $COMMON_FLAGS" |
| |
| echo "CC=$CC" >> $OUTPUT |
| echo "CXX=$CXX" >> $OUTPUT |
| echo "PLATFORM=$PLATFORM" >> $OUTPUT |
| echo "PLATFORM_LDFLAGS=$PLATFORM_LDFLAGS" >> $OUTPUT |
| echo "PLATFORM_LIBS=$PLATFORM_LIBS" >> $OUTPUT |
| echo "PLATFORM_CCFLAGS=$PLATFORM_CCFLAGS" >> $OUTPUT |
| echo "PLATFORM_CXXFLAGS=$PLATFORM_CXXFLAGS" >> $OUTPUT |
| echo "PLATFORM_SHARED_CFLAGS=$PLATFORM_SHARED_CFLAGS" >> $OUTPUT |
| echo "PLATFORM_SHARED_EXT=$PLATFORM_SHARED_EXT" >> $OUTPUT |
| echo "PLATFORM_SHARED_LDFLAGS=$PLATFORM_SHARED_LDFLAGS" >> $OUTPUT |
| echo "PLATFORM_SHARED_VERSIONED=$PLATFORM_SHARED_VERSIONED" >> $OUTPUT |