升级安装GD

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　　好久没升级我服务器上的软件包,今天我对每个重要的软件都看了一下,发现GD和php都有了升级,事不宜迟马上升级

gd的下载我没选择官方网站,因为官方的版本是不支持gif创建函数的,为什么会不支持呢?
官方网站是这样解释的:

When will you put GIF support back into gd?
Many have asked whether gd will support reading and creating GIF files again, since we have passed June 20th, 2003, when the well-known Unisys LZW patent expired in the US. Although this patent has expired in the United States, this patent does not expire for another year in the rest of the world. Since I have no way of limiting distribution of GIF-reading-and-creating code to US users only that is guaranteed to please somebody else's lawyer, I have opted to follow the same policy that the ImageMagick authors are following: GIF support will not reappear in gd until the patent expires world-wide on July 7th, 2004. I realize this situation is frustrating for many; please direct your anger and complaints toward the questionable patent system that allows the patenting of such straightforward algorithms in the first place. Thank you!

所以我从http://www.rime.com.au/gd/下载已经打了gif补丁的gd库.

wget http://downloads.rhyme.com.au/gd/gd-2.0.21gif_040120.tar.gz

tar zvxf gd-2.0.21gif_040120.tar.gz

cd gd-2.0.21gif

./configure --with-png=/usr --with-freetype=/usr --with-jpeg=/usr --with-xpm=/usr

make

make install


安装完毕,当然如果你用php的话,最好重新编译一下php,反正今天php今天也要升级到4.3.5.php的编译我就不多说了,不过php的官方好像说对gd的支持只到2.0.17,不知我这么高的版本是否支持的很好,反正不管了,升级.go go go

编译php的时候需要加哪些参数呢？

--with-freetype-dir=/usr --with-png-dir=/usr --with-gd=/usr/local --enable-gd-native-ttf --with-ttf --with-jpeg-dir=/usr --with-png

请问1.--with-freetype-dir=/usr --with-png-dir=/usr --with-gd=/usr/local

为什么不是 =/usr/lib 或者/usr/include 或者/usr/local/include 或/usr/local/lib呢？

2.--enable-gd-native-ttf --with-ttf

enable-gd-native-ttf是开启了什么功能呢？

--with-ttf 后为什么没有相应的 =/usr呢？

--with-freetype-dir是指它安装的路径,而不单单是lib路径或者include路径

--enable-gd-native-ttf GD: Enable TrueType string function.

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