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-rwxr-xr-xsrc/leveldb/build_detect_platform202
1 files changed, 202 insertions, 0 deletions
diff --git a/src/leveldb/build_detect_platform b/src/leveldb/build_detect_platform
new file mode 100755
index 000000000..7cdb793a1
--- /dev/null
+++ b/src/leveldb/build_detect_platform
@@ -0,0 +1,202 @@
+#!/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_CSTDATOMIC_PRESENT if <cstdatomic> 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 "$CXX"; then
+ CXX=g++
+fi
+
+# Detect OS
+if test -z "$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
+ Darwin)
+ PLATFORM=OS_MACOSX
+ COMMON_FLAGS="$MEMCMP_FLAG -DOS_MACOSX"
+ PLATFORM_SHARED_EXT=dylib
+ [ -z "$INSTALL_PATH" ] && INSTALL_PATH=`pwd`
+ PLATFORM_SHARED_LDFLAGS="-dynamiclib -install_name $INSTALL_PATH/"
+ PORT_FILE=port/port_posix.cc
+ ;;
+ Linux)
+ PLATFORM=OS_LINUX
+ COMMON_FLAGS="$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="$MEMCMP_FLAG -D_REENTRANT -DOS_HPUX"
+ PLATFORM_LDFLAGS="-pthread"
+ PORT_FILE=port/port_posix.cc
+ # man ld: +h internal_name
+ PLATFORM_SHARED_LDFLAGS="-shared -Wl,+h -Wl,"
+ ;;
+ *)
+ echo "Unknown platform!" >&2
+ exit 1
+esac
+
+# We want to make a list of all cc files within util, db, table, and helpers
+# except for the test and benchmark files. By default, find will output a list
+# of all files matching either rule, so we need to append -print to make the
+# prune take effect.
+DIRS="$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"
+PORTABLE_FILES=`find $DIRS $PRUNE_TEST -o $PRUNE_BENCH -o -name '*.cc' -print | sort | sed "s,^$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
+ # If -std=c++0x works, use <cstdatomic>. Otherwise use port_posix.h.
+ $CXX $CXXFLAGS -std=c++0x -x c++ - -o /dev/null 2>/dev/null <<EOF
+ #include <cstdatomic>
+ int main() {}
+EOF
+ if [ "$?" = 0 ]; then
+ COMMON_FLAGS="$COMMON_FLAGS -DLEVELDB_PLATFORM_POSIX -DLEVELDB_CSTDATOMIC_PRESENT"
+ PLATFORM_CXXFLAGS="-std=c++0x"
+ else
+ COMMON_FLAGS="$COMMON_FLAGS -DLEVELDB_PLATFORM_POSIX"
+ fi
+
+ # Test whether Snappy library is installed
+ # http://code.google.com/p/snappy/
+ $CXX $CXXFLAGS -x c++ - -o /dev/null 2>/dev/null <<EOF
+ #include <snappy.h>
+ int main() {}
+EOF
+ if [ "$?" = 0 ]; then
+ COMMON_FLAGS="$COMMON_FLAGS -DSNAPPY"
+ PLATFORM_LIBS="$PLATFORM_LIBS -lsnappy"
+ fi
+
+ # Test whether tcmalloc is available
+ $CXX $CXXFLAGS -x c++ - -o /dev/null -ltcmalloc 2>/dev/null <<EOF
+ int main() {}
+EOF
+ if [ "$?" = 0 ]; then
+ PLATFORM_LIBS="$PLATFORM_LIBS -ltcmalloc"
+ fi
+fi
+
+PLATFORM_CCFLAGS="$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