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224 lines
7.3 KiB
224 lines
7.3 KiB
#!/bin/sh |
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# |
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# Detects OS we're compiling on and outputs a file specified by the first |
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# argument, which in turn gets read while processing Makefile. |
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# |
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# The output will set the following variables: |
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# CC C Compiler path |
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# CXX C++ Compiler path |
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# PLATFORM_LDFLAGS Linker flags |
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# PLATFORM_LIBS Libraries flags |
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# PLATFORM_SHARED_EXT Extension for shared libraries |
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# PLATFORM_SHARED_LDFLAGS Flags for building shared library |
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# This flag is embedded just before the name |
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# of the shared library without intervening spaces |
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# PLATFORM_SHARED_CFLAGS Flags for compiling objects for shared library |
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# PLATFORM_CCFLAGS C compiler flags |
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# PLATFORM_CXXFLAGS C++ compiler flags. Will contain: |
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# PLATFORM_SHARED_VERSIONED Set to 'true' if platform supports versioned |
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# shared libraries, empty otherwise. |
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# |
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# The PLATFORM_CCFLAGS and PLATFORM_CXXFLAGS might include the following: |
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# |
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# -DLEVELDB_CSTDATOMIC_PRESENT if <cstdatomic> is present |
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# -DLEVELDB_PLATFORM_POSIX for Posix-based platforms |
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# -DSNAPPY if the Snappy library is present |
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# |
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OUTPUT=$1 |
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PREFIX=$2 |
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if test -z "$OUTPUT" || test -z "$PREFIX"; then |
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echo "usage: $0 <output-filename> <directory_prefix>" >&2 |
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exit 1 |
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fi |
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# Delete existing output, if it exists |
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rm -f $OUTPUT |
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touch $OUTPUT |
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if test -z "$CC"; then |
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CC=cc |
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fi |
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if test -z "$CXX"; then |
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CXX=g++ |
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fi |
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if test -z "$TMPDIR"; then |
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TMPDIR=/tmp |
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fi |
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# Detect OS |
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if test -z "$TARGET_OS"; then |
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TARGET_OS=`uname -s` |
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fi |
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COMMON_FLAGS= |
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CROSS_COMPILE= |
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PLATFORM_CCFLAGS= |
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PLATFORM_CXXFLAGS= |
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PLATFORM_LDFLAGS= |
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PLATFORM_LIBS= |
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PLATFORM_SHARED_EXT="so" |
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PLATFORM_SHARED_LDFLAGS="-shared -Wl,-soname -Wl," |
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PLATFORM_SHARED_CFLAGS="-fPIC" |
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PLATFORM_SHARED_VERSIONED=true |
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MEMCMP_FLAG= |
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if [ "$CXX" = "g++" ]; then |
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# Use libc's memcmp instead of GCC's memcmp. This results in ~40% |
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# performance improvement on readrandom under gcc 4.4.3 on Linux/x86. |
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MEMCMP_FLAG="-fno-builtin-memcmp" |
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fi |
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case "$TARGET_OS" in |
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Darwin) |
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PLATFORM=OS_MACOSX |
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COMMON_FLAGS="$MEMCMP_FLAG -DOS_MACOSX" |
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PLATFORM_SHARED_EXT=dylib |
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[ -z "$INSTALL_PATH" ] && INSTALL_PATH=`pwd` |
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PLATFORM_SHARED_LDFLAGS="-dynamiclib -install_name $INSTALL_PATH/" |
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PORT_FILE=port/port_posix.cc |
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;; |
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Linux) |
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PLATFORM=OS_LINUX |
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COMMON_FLAGS="$MEMCMP_FLAG -pthread -DOS_LINUX" |
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PLATFORM_LDFLAGS="-pthread" |
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PORT_FILE=port/port_posix.cc |
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;; |
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SunOS) |
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PLATFORM=OS_SOLARIS |
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COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_SOLARIS" |
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PLATFORM_LIBS="-lpthread -lrt" |
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PORT_FILE=port/port_posix.cc |
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;; |
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FreeBSD) |
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PLATFORM=OS_FREEBSD |
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COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_FREEBSD" |
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PLATFORM_LIBS="-lpthread" |
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PORT_FILE=port/port_posix.cc |
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;; |
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GNU/kFreeBSD) |
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PLATFORM=OS_KFREEBSD |
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COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_KFREEBSD" |
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PLATFORM_LIBS="-lpthread" |
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PORT_FILE=port/port_posix.cc |
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;; |
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NetBSD) |
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PLATFORM=OS_NETBSD |
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COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_NETBSD" |
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PLATFORM_LIBS="-lpthread -lgcc_s" |
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PORT_FILE=port/port_posix.cc |
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;; |
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OpenBSD) |
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PLATFORM=OS_OPENBSD |
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COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_OPENBSD" |
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PLATFORM_LDFLAGS="-pthread" |
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PORT_FILE=port/port_posix.cc |
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;; |
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DragonFly) |
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PLATFORM=OS_DRAGONFLYBSD |
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COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_DRAGONFLYBSD" |
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PLATFORM_LIBS="-lpthread" |
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PORT_FILE=port/port_posix.cc |
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;; |
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OS_ANDROID_CROSSCOMPILE) |
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PLATFORM=OS_ANDROID |
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COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_ANDROID -DLEVELDB_PLATFORM_POSIX" |
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PLATFORM_LDFLAGS="" # All pthread features are in the Android C library |
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PORT_FILE=port/port_posix.cc |
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CROSS_COMPILE=true |
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;; |
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HP-UX) |
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PLATFORM=OS_HPUX |
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COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_HPUX" |
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PLATFORM_LDFLAGS="-pthread" |
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PORT_FILE=port/port_posix.cc |
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# man ld: +h internal_name |
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PLATFORM_SHARED_LDFLAGS="-shared -Wl,+h -Wl," |
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;; |
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IOS) |
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PLATFORM=IOS |
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COMMON_FLAGS="$MEMCMP_FLAG -DOS_MACOSX" |
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[ -z "$INSTALL_PATH" ] && INSTALL_PATH=`pwd` |
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PORT_FILE=port/port_posix.cc |
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PLATFORM_SHARED_EXT= |
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PLATFORM_SHARED_LDFLAGS= |
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PLATFORM_SHARED_CFLAGS= |
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PLATFORM_SHARED_VERSIONED= |
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;; |
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OS_WINDOWS_CROSSCOMPILE | NATIVE_WINDOWS) |
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PLATFORM=OS_WINDOWS |
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COMMON_FLAGS="-fno-builtin-memcmp -D_REENTRANT -DOS_WINDOWS -DLEVELDB_PLATFORM_WINDOWS -DWINVER=0x0500 -D__USE_MINGW_ANSI_STDIO=1" |
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PLATFORM_SOURCES="util/env_win.cc" |
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PLATFORM_LIBS="-lshlwapi" |
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PORT_FILE=port/port_win.cc |
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CROSS_COMPILE=true |
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;; |
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*) |
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echo "Unknown platform!" >&2 |
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exit 1 |
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esac |
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# We want to make a list of all cc files within util, db, table, and helpers |
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# except for the test and benchmark files. By default, find will output a list |
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# of all files matching either rule, so we need to append -print to make the |
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# prune take effect. |
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DIRS="$PREFIX/db $PREFIX/util $PREFIX/table" |
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set -f # temporarily disable globbing so that our patterns aren't expanded |
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PRUNE_TEST="-name *test*.cc -prune" |
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PRUNE_BENCH="-name *_bench.cc -prune" |
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PRUNE_TOOL="-name leveldb_main.cc -prune" |
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PORTABLE_FILES=`find $DIRS $PRUNE_TEST -o $PRUNE_BENCH -o $PRUNE_TOOL -o -name '*.cc' -print | sort | sed "s,^$PREFIX/,," | tr "\n" " "` |
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set +f # re-enable globbing |
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# The sources consist of the portable files, plus the platform-specific port |
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# file. |
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echo "SOURCES=$PORTABLE_FILES $PORT_FILE" >> $OUTPUT |
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echo "MEMENV_SOURCES=helpers/memenv/memenv.cc" >> $OUTPUT |
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if [ "$CROSS_COMPILE" = "true" ]; then |
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# Cross-compiling; do not try any compilation tests. |
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true |
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else |
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CXXOUTPUT="${TMPDIR}/leveldb_build_detect_platform-cxx.$$" |
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# If -std=c++0x works, use <cstdatomic>. Otherwise use port_posix.h. |
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$CXX $CXXFLAGS -std=c++0x -x c++ - -o $CXXOUTPUT 2>/dev/null <<EOF |
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#include <cstdatomic> |
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int main() {} |
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EOF |
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if [ "$?" = 0 ]; then |
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COMMON_FLAGS="$COMMON_FLAGS -DLEVELDB_PLATFORM_POSIX -DLEVELDB_CSTDATOMIC_PRESENT" |
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PLATFORM_CXXFLAGS="-std=c++0x" |
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else |
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COMMON_FLAGS="$COMMON_FLAGS -DLEVELDB_PLATFORM_POSIX" |
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fi |
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# Test whether tcmalloc is available |
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$CXX $CXXFLAGS -x c++ - -o $CXXOUTPUT -ltcmalloc 2>/dev/null <<EOF |
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int main() {} |
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EOF |
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if [ "$?" = 0 ]; then |
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PLATFORM_LIBS="$PLATFORM_LIBS -ltcmalloc" |
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fi |
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rm -f $CXXOUTPUT 2>/dev/null |
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fi |
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PLATFORM_CCFLAGS="$PLATFORM_CCFLAGS $COMMON_FLAGS" |
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PLATFORM_CXXFLAGS="$PLATFORM_CXXFLAGS $COMMON_FLAGS" |
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echo "CC=$CC" >> $OUTPUT |
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echo "CXX=$CXX" >> $OUTPUT |
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echo "PLATFORM=$PLATFORM" >> $OUTPUT |
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echo "PLATFORM_LDFLAGS=$PLATFORM_LDFLAGS" >> $OUTPUT |
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echo "PLATFORM_LIBS=$PLATFORM_LIBS" >> $OUTPUT |
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echo "PLATFORM_CCFLAGS=$PLATFORM_CCFLAGS" >> $OUTPUT |
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echo "PLATFORM_CXXFLAGS=$PLATFORM_CXXFLAGS" >> $OUTPUT |
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echo "PLATFORM_SHARED_CFLAGS=$PLATFORM_SHARED_CFLAGS" >> $OUTPUT |
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echo "PLATFORM_SHARED_EXT=$PLATFORM_SHARED_EXT" >> $OUTPUT |
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echo "PLATFORM_SHARED_LDFLAGS=$PLATFORM_SHARED_LDFLAGS" >> $OUTPUT |
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echo "PLATFORM_SHARED_VERSIONED=$PLATFORM_SHARED_VERSIONED" >> $OUTPUT
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