rocksdb/build_detect_platform
Gabor Cselle 299ccedfec A number of bugfixes:
- Added DB::CompactRange() method.

  Changed manual compaction code so it breaks up compactions of
  big ranges into smaller compactions.

  Changed the code that pushes the output of memtable compactions
  to higher levels to obey the grandparent constraint: i.e., we
  must never have a single file in level L that overlaps too
  much data in level L+1 (to avoid very expensive L-1 compactions).

  Added code to pretty-print internal keys.

- Fixed bug where we would not detect overlap with files in
  level-0 because we were incorrectly using binary search
  on an array of files with overlapping ranges.

  Added "leveldb.sstables" property that can be used to dump
  all of the sstables and ranges that make up the db state.

- Removing post_write_snapshot support.  Email to leveldb mailing
  list brought up no users, just confusion from one person about
  what it meant.

- Fixing static_cast char to unsigned on BIG_ENDIAN platforms.

  Fixes	Issue 35 and Issue 36.

- Comment clarification to address leveldb Issue 37.

- Change license in posix_logger.h to match other files.

- A build problem where uint32 was used instead of uint32_t.

Sync with upstream @24408625
2011-10-05 16:30:28 -07:00

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#!/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
# -DLEVELDB_PLATFORM_NOATOMIC if it is not
# - PLATFORM_CFLAGS with compiler flags for the platform
# - PLATFORM_LDFLAGS with linker flags for the platform
# Delete existing build_config.mk
rm -f build_config.mk
# Detect OS
case `uname -s` in
Darwin)
PLATFORM=OS_MACOSX
echo "PLATFORM_CFLAGS=-DOS_MACOSX" >> build_config.mk
echo "PLATFORM_LDFLAGS=" >> build_config.mk
;;
Linux)
PLATFORM=OS_LINUX
echo "PLATFORM_CFLAGS=-pthread -DOS_LINUX" >> build_config.mk
echo "PLATFORM_LDFLAGS=-lpthread" >> build_config.mk
;;
SunOS)
PLATFORM=OS_SOLARIS
echo "PLATFORM_CFLAGS=-D_REENTRANT -DOS_SOLARIS" >> build_config.mk
echo "PLATFORM_LDFLAGS=-lpthread -lrt" >> build_config.mk
;;
FreeBSD)
PLATFORM=OS_FREEBSD
echo "PLATFORM_CFLAGS=-D_REENTRANT -DOS_FREEBSD" >> build_config.mk
echo "PLATFORM_LDFLAGS=-lpthread" >> build_config.mk
;;
*)
echo "Unknown platform!"
exit 1
esac
echo "PLATFORM=$PLATFORM" >> build_config.mk
# On GCC, use libc's memcmp, not GCC's memcmp
PORT_CFLAGS="-fno-builtin-memcmp"
# 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 g++ returns error code, we know to use port_posix.h
g++ $CFLAGS -std=c++0x -x c++ - -o /dev/null 2>/dev/null <<EOF
#include <cstdatomic>
int main() {}
EOF
if [ "$?" = 0 ]; then
PORT_CFLAGS="$PORT_CFLAGS -DLEVELDB_PLATFORM_POSIX -DLEVELDB_CSTDATOMIC_PRESENT -std=c++0x"
else
PORT_CFLAGS="$PORT_CFLAGS -DLEVELDB_PLATFORM_POSIX"
fi
# Test whether Snappy library is installed
# http://code.google.com/p/snappy/
g++ $CFLAGS -x c++ - -o /dev/null 2>/dev/null <<EOF
#include <snappy.h>
int main() {}
EOF
if [ "$?" = 0 ]; then
echo "SNAPPY=1" >> build_config.mk
else
echo "SNAPPY=0" >> build_config.mk
fi
echo "PORT_CFLAGS=$PORT_CFLAGS" >> build_config.mk