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.
6
# The output will set the following variables:
8
# CXX C++ Compiler path
9
# PLATFORM_LDFLAGS Linker flags
10
# PLATFORM_LIBS Libraries flags
11
# PLATFORM_SHARED_EXT Extension for shared libraries
12
# PLATFORM_SHARED_LDFLAGS Flags for building shared library
13
# This flag is embedded just before the name
14
# of the shared library without intervening spaces
15
# PLATFORM_SHARED_CFLAGS Flags for compiling objects for shared library
16
# PLATFORM_CCFLAGS C compiler flags
17
# PLATFORM_CXXFLAGS C++ compiler flags. Will contain:
18
# PLATFORM_SHARED_VERSIONED Set to 'true' if platform supports versioned
19
# shared libraries, empty otherwise.
21
# The PLATFORM_CCFLAGS and PLATFORM_CXXFLAGS might include the following:
23
# -DLEVELDB_CSTDATOMIC_PRESENT if <cstdatomic> is present
24
# -DLEVELDB_PLATFORM_POSIX for Posix-based platforms
25
# -DSNAPPY if the Snappy library is present
30
if test -z "$OUTPUT" || test -z "$PREFIX"; then
31
echo "usage: $0 <output-filename> <directory_prefix>" >&2
35
# Delete existing output, if it exists
39
if test -z "$CC"; then
43
if test -z "$CXX"; then
47
if test -z "$TMPDIR"; then
52
if test -z "$TARGET_OS"; then
62
PLATFORM_SHARED_EXT="so"
63
PLATFORM_SHARED_LDFLAGS="-shared -Wl,-soname -Wl,"
64
PLATFORM_SHARED_CFLAGS="-fPIC"
65
PLATFORM_SHARED_VERSIONED=true
68
if [ "$CXX" = "g++" ]; then
69
# Use libc's memcmp instead of GCC's memcmp. This results in ~40%
70
# performance improvement on readrandom under gcc 4.4.3 on Linux/x86.
71
MEMCMP_FLAG="-fno-builtin-memcmp"
77
COMMON_FLAGS="$MEMCMP_FLAG -DOS_MACOSX"
78
PLATFORM_SHARED_EXT=dylib
79
[ -z "$INSTALL_PATH" ] && INSTALL_PATH=`pwd`
80
PLATFORM_SHARED_LDFLAGS="-dynamiclib -install_name $INSTALL_PATH/"
81
PORT_FILE=port/port_posix.cc
85
COMMON_FLAGS="$MEMCMP_FLAG -pthread -DOS_LINUX"
86
PLATFORM_LDFLAGS="-pthread"
87
PORT_FILE=port/port_posix.cc
91
COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_SOLARIS"
92
PLATFORM_LIBS="-lpthread -lrt"
93
PORT_FILE=port/port_posix.cc
97
COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_FREEBSD"
98
PLATFORM_LIBS="-lpthread"
99
PORT_FILE=port/port_posix.cc
103
COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_NETBSD"
104
PLATFORM_LIBS="-lpthread -lgcc_s"
105
PORT_FILE=port/port_posix.cc
109
COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_OPENBSD"
110
PLATFORM_LDFLAGS="-pthread"
111
PORT_FILE=port/port_posix.cc
114
PLATFORM=OS_DRAGONFLYBSD
115
COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_DRAGONFLYBSD"
116
PLATFORM_LIBS="-lpthread"
117
PORT_FILE=port/port_posix.cc
119
OS_ANDROID_CROSSCOMPILE)
121
COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_ANDROID -DLEVELDB_PLATFORM_POSIX"
122
PLATFORM_LDFLAGS="" # All pthread features are in the Android C library
123
PORT_FILE=port/port_posix.cc
128
COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_HPUX"
129
PLATFORM_LDFLAGS="-pthread"
130
PORT_FILE=port/port_posix.cc
131
# man ld: +h internal_name
132
PLATFORM_SHARED_LDFLAGS="-shared -Wl,+h -Wl,"
136
COMMON_FLAGS="$MEMCMP_FLAG -DOS_MACOSX"
137
[ -z "$INSTALL_PATH" ] && INSTALL_PATH=`pwd`
138
PORT_FILE=port/port_posix.cc
140
PLATFORM_SHARED_LDFLAGS=
141
PLATFORM_SHARED_CFLAGS=
142
PLATFORM_SHARED_VERSIONED=
145
echo "Unknown platform!" >&2
149
# We want to make a list of all cc files within util, db, table, and helpers
150
# except for the test and benchmark files. By default, find will output a list
151
# of all files matching either rule, so we need to append -print to make the
153
DIRS="$PREFIX/db $PREFIX/util $PREFIX/table"
155
set -f # temporarily disable globbing so that our patterns aren't expanded
156
PRUNE_TEST="-name *test*.cc -prune"
157
PRUNE_BENCH="-name *_bench.cc -prune"
158
PRUNE_TOOL="-name leveldb_main.cc -prune"
159
PORTABLE_FILES=`find $DIRS $PRUNE_TEST -o $PRUNE_BENCH -o $PRUNE_TOOL -o -name '*.cc' -print | sort | sed "s,^$PREFIX/,," | tr "\n" " "`
161
set +f # re-enable globbing
163
# The sources consist of the portable files, plus the platform-specific port
165
echo "SOURCES=$PORTABLE_FILES $PORT_FILE" >> $OUTPUT
166
echo "MEMENV_SOURCES=helpers/memenv/memenv.cc" >> $OUTPUT
168
if [ "$CROSS_COMPILE" = "true" ]; then
169
# Cross-compiling; do not try any compilation tests.
172
CXXOUTPUT="${TMPDIR}/leveldb_build_detect_platform-cxx.$$"
174
# If -std=c++0x works, use <cstdatomic>. Otherwise use port_posix.h.
175
$CXX $CXXFLAGS -std=c++0x -x c++ - -o $CXXOUTPUT 2>/dev/null <<EOF
176
#include <cstdatomic>
179
if [ "$?" = 0 ]; then
180
COMMON_FLAGS="$COMMON_FLAGS -DLEVELDB_PLATFORM_POSIX -DLEVELDB_CSTDATOMIC_PRESENT"
181
PLATFORM_CXXFLAGS="-std=c++0x"
183
COMMON_FLAGS="$COMMON_FLAGS -DLEVELDB_PLATFORM_POSIX"
186
# Test whether Snappy library is installed
187
# http://code.google.com/p/snappy/
188
$CXX $CXXFLAGS -x c++ - -o $CXXOUTPUT 2>/dev/null <<EOF
192
if [ "$?" = 0 ]; then
193
COMMON_FLAGS="$COMMON_FLAGS -DSNAPPY"
194
PLATFORM_LIBS="$PLATFORM_LIBS -lsnappy"
197
# Test whether tcmalloc is available
198
$CXX $CXXFLAGS -x c++ - -o $CXXOUTPUT -ltcmalloc 2>/dev/null <<EOF
201
if [ "$?" = 0 ]; then
202
PLATFORM_LIBS="$PLATFORM_LIBS -ltcmalloc"
205
rm -f $CXXOUTPUT 2>/dev/null
208
PLATFORM_CCFLAGS="$PLATFORM_CCFLAGS $COMMON_FLAGS"
209
PLATFORM_CXXFLAGS="$PLATFORM_CXXFLAGS $COMMON_FLAGS"
211
echo "CC=$CC" >> $OUTPUT
212
echo "CXX=$CXX" >> $OUTPUT
213
echo "PLATFORM=$PLATFORM" >> $OUTPUT
214
echo "PLATFORM_LDFLAGS=$PLATFORM_LDFLAGS" >> $OUTPUT
215
echo "PLATFORM_LIBS=$PLATFORM_LIBS" >> $OUTPUT
216
echo "PLATFORM_CCFLAGS=$PLATFORM_CCFLAGS" >> $OUTPUT
217
echo "PLATFORM_CXXFLAGS=$PLATFORM_CXXFLAGS" >> $OUTPUT
218
echo "PLATFORM_SHARED_CFLAGS=$PLATFORM_SHARED_CFLAGS" >> $OUTPUT
219
echo "PLATFORM_SHARED_EXT=$PLATFORM_SHARED_EXT" >> $OUTPUT
220
echo "PLATFORM_SHARED_LDFLAGS=$PLATFORM_SHARED_LDFLAGS" >> $OUTPUT
221
echo "PLATFORM_SHARED_VERSIONED=$PLATFORM_SHARED_VERSIONED" >> $OUTPUT
added
removed
cppForSwig/leveldb/build_detect_platform
