@ -1,81 +1,119 @@
#!/bin/sh
#
# Detects OS we're compiling on and generates build_config.mk,
# which in turn gets read while processing Makefile.
#
# build_config.mk will set the following variables:
# - PORT_CFLAGS will either set:
# -DLEVELDB_PLATFORM_POSIX if cstatomic is present
# PLATFORM_LDFLAGS Linker flags
# PLATFORM_CCFLAGS C compiler flags
# PLATFORM_CXXFLAGS C++ compiler flags. Will contain:
# -DLEVELDB_PLATFORM_POSIX if cstdatomic is present
# -DLEVELDB_PLATFORM_NOATOMIC if it is not
# - PLATFORM_CFLAGS with compiler flags for the platform
# - PLATFORM_LDFLAGS with linker flags for the platform
SCRIPT_DIR=`dirname $0`
# Delete existing build_config.mk
rm -f build_config.mk
touch build_config.mk
if test -z "$CXX"; then
CXX=g++
fi
# Detect OS
case `uname -s` in
if test -z "$TARGET_OS"; then
TARGET_OS=`uname -s`
fi
COMMON_FLAGS=
PLATFORM_CCFLAGS=
PLATFORM_CXXFLAGS=
PLATFORM_LDFLAGS=
# On GCC, we pick libc's memcmp over GCC's memcmp via -fno-builtin-memcmp
case "$TARGET_OS" in
Darwin)
PLATFORM=OS_MACOSX
echo "PLATFORM_CFLAGS=-DOS_MACOSX" >> build_config.mk
echo "PLATFORM_LDFLAGS=" >> build_config.mk
COMMON_FLAGS="-fno-builtin-memcmp -DOS_MACOSX"
PORT_FILE=port/port_posix.cc
;;
Linux)
PLATFORM=OS_LINUX
echo "PLATFORM_CFLAGS=-pthread -DOS_LINUX" >> build_config.mk
echo "PLATFORM_LDFLAGS=-pthread" >> build_config.mk
COMMON_FLAGS="-fno-builtin-memcmp -pthread -DOS_LINUX"
PLATFORM_LDFLAGS="-pthread"
PORT_FILE=port/port_posix.cc
;;
SunOS)
PLATFORM=OS_SOLARIS
echo "PLATFORM_CFLAGS=-D_REENTRANT -DOS_SOLARIS" >> build_config.mk
echo "PLATFORM_LDFLAGS=-lpthread -lrt" >> build_config.mk
COMMON_FLAGS="-fno-builtin-memcmp -D_REENTRANT -DOS_SOLARIS"
PLATFORM_LDFLAGS="-lpthread -lrt"
PORT_FILE=port/port_posix.cc
;;
FreeBSD)
PLATFORM=OS_FREEBSD
echo "PLATFORM_CFLAGS=-D_REENTRANT -DOS_FREEBSD" >> build_config.mk
echo "PLATFORM_LDFLAGS=-lpthread" >> build_config.mk
COMMON_FLAGS="-fno-builtin-memcmp -D_REENTRANT -DOS_FREEBSD"
PLATFORM_LDFLAGS="-lpthread"
PORT_FILE=port/port_posix.cc
;;
NetBSD)
PLATFORM=OS_NETBSD
echo "PLATFORM_CFLAGS=-D_REENTRANT -DOS_NETBSD" >> build_config.mk
echo "PLATFORM_LDFLAGS=-lpthread -lgcc_s" >> build_config.mk
COMMON_FLAGS="-fno-builtin-memcmp -D_REENTRANT -DOS_NETBSD"
PLATFORM_LDFLAGS="-lpthread -lgcc_s"
PORT_FILE=port/port_posix.cc
;;
OpenBSD)
PLATFORM=OS_OPENBSD
echo "PLATFORM_CFLAGS=-D_REENTRANT -DOS_OPENBSD" >> build_config.mk
echo "PLATFORM_LDFLAGS=-pthread" >> build_config.mk
COMMON_FLAGS="-fno-builtin-memcmp -D_REENTRANT -DOS_OPENBSD"
PLATFORM_LDFLAGS="-pthread"
PORT_FILE=port/port_posix.cc
;;
DragonFly)
PLATFORM=OS_DRAGONFLYBSD
echo "PLATFORM_CFLAGS=-D_REENTRANT -DOS_DRAGONFLYBSD" >> build_config.mk
echo "PLATFORM_LDFLAGS=-lpthread" >> build_config.mk
COMMON_FLAGS="-fno-builtin-memcmp -D_REENTRANT -DOS_DRAGONFLYBSD"
PLATFORM_LDFLAGS="-lpthread"
PORT_FILE=port/port_posix.cc
;;
OS_ANDROID_CROSSCOMPILE)
PLATFORM="$TARGET_OS"
COMMON_FLAGS=""
PLATFORM_LDFLAGS=""
PORT_FILE=port/port_android.cc
;;
*)
echo "Unknown platform!"
exit 1
esac
echo "PLATFORM=$PLATFORM" >> build_config.mk
# 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="$SCRIPT_DIR/util $SCRIPT_DIR/db $SCRIPT_DIR/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 $PRUNE_BENCH -o -name '*.cc' -print | sort | tr "\n" " "`
set +f # re-enable globbing
# On GCC, use libc's memcmp, not GCC's memcmp
PORT_CFLAGS="-fno-builtin-memcmp"
# The sources consist of the portable files, plus the platform-specific port
# file.
echo "SOURCES=$PORTABLE_FILES $PORT_FILE" >> build_config.mk
echo "MEMENV_SOURCES=helpers/memenv/memenv.cc" >> build_config.mk
# Detect C++0x -- this determines whether we'll use port_noatomic.h
# or port_posix.h by:
# 1. Rrying to compile with -std=c++0x and including <cstdatomic>.
# 2. If $CXX returns error code, we know to use port_posix.h
if [ "$PLATFORM" = "OS_ANDROID_CROSSCOMPILE" ]; then
# Cross-compiling; do not try any compilation tests.
true
else
# If -std=c++0x works, use <cstdatomic>. Otherwise use port_posix.h.
$CXX $CFLAGS -std=c++0x -x c++ - -o /dev/null 2>/dev/null <<EOF
#include <cstdatomic>
int main() {}
EOF
if [ "$?" = 0 ]; then
PORT_CFLAGS="$PORT_CFLAGS -DLEVELDB_PLATFORM_POSIX -DLEVELDB_CSTDATOMIC_PRESENT -std=c++0x"
COMMON_FLAGS="$COMMON_FLAGS -DLEVELDB_PLATFORM_POSIX -DLEVELDB_CSTDATOMIC_PRESENT"
PLATFORM_CXXFLAGS="-std=c++0x"
else
PORT_CFLAGS="$PORT_C FLAGS -DLEVELDB_PLATFORM_POSIX"
COMMON_FLAGS="$COMMON_ FLAGS -DLEVELDB_PLATFORM_POSIX"
fi
# Test whether Snappy library is installed
@ -85,9 +123,23 @@ $CXX $CFLAGS -x c++ - -o /dev/null 2>/dev/null <<EOF
int main() {}
EOF
if [ "$?" = 0 ]; then
echo "SNAPPY=1" >> build_config.mk
else
echo "SNAPPY=0" >> build_config.mk
COMMON_FLAGS="$COMMON_FLAGS -DSNAPPY"
PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -lsnappy"
fi
echo "PORT_CFLAGS=$PORT_CFLAGS" >> build_config.mk
# Test whether tcmalloc is available
$CXX $CFLAGS -x c++ - -o /dev/null -ltcmalloc 2>/dev/null <<EOF
int main() {}
EOF
if [ "$?" = 0 ]; then
PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -ltcmalloc"
fi
fi
PLATFORM_CCFLAGS="$PLATFORM_CCFLAGS $COMMON_FLAGS"
PLATFORM_CXXFLAGS="$PLATFORM_CXXFLAGS $COMMON_FLAGS"
echo "PLATFORM=$PLATFORM" >> build_config.mk
echo "PLATFORM_LDFLAGS=$PLATFORM_LDFLAGS" >> build_config.mk
echo "PLATFORM_CCFLAGS=$PLATFORM_CCFLAGS" >> build_config.mk
echo "PLATFORM_CXXFLAGS=$PLATFORM_CXXFLAGS" >> build_config.mk
Sanjay Ghemawat
13 years ago