diff options
Diffstat (limited to 'src/leveldb/build_detect_platform')
| -rwxr-xr-x | src/leveldb/build_detect_platform | 202 |
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 |