我正在使用 mac，我想安装osm2pgsql以将OSM数据导入PostgreSQL.
我brew install osm2pgsql在终端执行。（我已经执行了brew update）。
这是输出：
==> Downloading https://github.com/openstreetmap/osm2pgsql/archive/v0.82.0.zip
Already downloaded: /Library/Caches/Homebrew/osm2pgsql-0.82.0.zip
==> ./autogen.sh
==> ./configure --with-proj=/usr/local/opt/proj
checking for fork... yes
checking for xml2-config... /usr/bin/xml2-config
checking for xml2 libraries... yes
checking for zlib compression library... no
configure: error: required library not found
READ THIS: https://github.com/mxcl/homebrew/wiki/troubleshooting
这是执行的输出brew doctor：
Warning: Unbrewed dylibs were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.
Unexpected dylibs:
/usr/local/lib/libMonoPosixHelper.dylib
/usr/local/lib/libSFFileMonitor.32.dylib
/usr/local/lib/libSFIPC.32.dylib
/usr/local/lib/libSFIPC.I.dylib
/usr/local/lib/libSFsqlite3.7.4.dylib
/usr/local/lib/libSFSyncEngine.I.dylib
我不知道这些 dylib，我应该删除它们吗？
我应该怎么做 linstall osm2pgsql？
还是我应该放弃osm2pgsql并使用其他工具将OSM数据导入PostgreSQL？
[编辑 1]
根据http://www.zlib.net/，zlib 已经包含在 Mac OS X 中。
当我在谷歌中搜索它时，我发现了这个https://github.com/josegonzalez/homebrew-php/issues/205和这个https://github.com/josgonzalez/homebrew-php/issues/538
所以我执行以下两个命令：
brew tap homebrew/dupes
brew install zlib
结果输出为：
==> Downloading http://zlib.net/zlib-1.2.8.tar.gz
######################################################################## 100.0%
==> ./configure --prefix=/usr/local/Cellar/zlib/1.2.8
==> make install
==> Caveats
This formula is keg-only: so it was not symlinked into /usr/local.
Mac OS X already provides this software and installing another version in
parallel can cause all kinds of trouble.
Generally there are no consequences of this for you. If you build your
own software and it requires this formula, you'll need to add to your
build variables:
LDFLAGS: -L/usr/local/opt/zlib/lib
CPPFLAGS: -I/usr/local/opt/zlib/include
==> Summary
看来我不必安装zlib。
我再次执行brew install osm2pgsql，但它仍然不起作用。
[编辑 2]
我放弃自制软件并通过二进制安装程序安装 osm2pgsql。
仅供参考：
http ://wiki.openstreetmap.org/wiki/Osm2pgsql#Binary_Installer
https://github.com/openstreetmap/osm2pgsql/issues/15