为了忘却的记忆

whhif

我发现我总是会将很熟的东西忘掉，可能是它在当时没有给我刻下深刻的回忆，这种代价是不能容忍的，我要记住应该记住的，也不能忘掉需要忘掉的，我想这种人也就只有神才能做到，因此我要发扬“好记性不如烂笔头”的精神，把它写到blog里。
    Collectd在编译时，要将rrdtool的库用                /configure --with-rrdtool=/usr/local/rrdtool-1.2.13/  不能加lib，否则找不到。
打过补丁的cron，只能将/var/spool/cron/crontabs/root这个文件置为0600属性，要不就不能执行，会报"WRONG INODE INFO"这个错，还真不能不看cron的源码，否则打死也想不到这个，也google不到。
rrdbuild
Overview
If you downloaded the source of rrdtool you have to compile it. This document will give some information on how this is done.
RRDtool relies on services of thrid part libraries. Some of these libraries may already be installed on your system. You have to compile copies of the other ones before you can build RRDtool.
This document will tell you about all the necessary steps to get going.
Building
Before you start to build RRDtool, you have to decide two things:
1.    In which directory you want to build the software.
2.    Where you want to install the software.
Once you have decided. Save the two locations into environment variables. Depending on the shell you are using, you can do either (bash,zsh):
BUILD_DIR=/tmp/rrdbuild
INSTALL_DIR=/usr/local/rrdtool-1.2.13
Or if you run tcsh:
set BUILD_DIR=/tmp/rrdbuild
set INSTALL_DIR=/usr/local/rrdtool-1.2.13
Now make sure the BUILD_DIR exists and go there:
mkdir -p $BUILD_DIR
cd $BUILD_DIR
Lets first assume you already have all the necessary libraries pre-installed. Note that these instructions assume that your copies of tar and make are actually GNU tar and GNU make respectively. It could be that they are installed as gtar and gmake on your system.
wget
http://oss.oetiker.ch/rrdtool/pub/rrdtool-1.2.13.tar.gz
tar zxf rrdtool-1.2.13.tar.gz
cd rrdtool-1.2.13
./configure --prefix=$INSTALL_DIR && make && make install
Ok, this was very optimistic. This try will probably have ended with configure complaining about several missing libraries. If you are on a Linux or *bsd system you may want to just install the missing bits from your software repository. When you do that, make sure you also get the -dev package for each library you install. Once you have the missing bits on board, just re-run the last line of the instructions above.
But again this may have been too optimistic, and you actually have to compile your own copies of the required libraries. Here is how:
Building zlib
cd $BUILD_DIR
wget
http://oss.oetiker.ch/rrdtool/pub/libs/zlib-1.2.3.tar.gz
tar  zxf zlib-1.2.3.tar.gz
cd zlib-1.2.2
env CFLAGS="-O3 -fPIC" ./configure --prefix=$BUILD_DIR/lb
make
make install
Building libpng
Libpng itself requires zlib to build, so we need to help a bit. If you already have a copy of zlib on your system (which is very likley) you can drop the settings of LDFLAGS and CPPFLAGS. Note that the backslash (\) at the end of line 4 means that line 4 and line 5 are on one line.
cd $BUILD_DIR
wget
http://oss.oetiker.ch/rrdtool/pub/libs/libpng-1.2.8-config.tar.gz
tar zxvf libpng-1.2.10.tar.gz
cd libpng-1.2.10
env CPPFLAGS="-I$BUILD_DIR/lb/include" LDFLAGS="-L$BUILD_DIR/lb/lib" CFLAGS="-O3 -fPIC" \
    ./configure --disable-shared --prefix=$BUILD_DIR/lb
make
make install
Building freetype
cd $BUILD_DIR
wget
http://oss.oetiker.ch/rrdtool/pub/libs/freetype-2.1.10.tar.bz2
tar jxvf freetype-2.1.10.tar.bz2
cd freetype-2.1.10
env CPPFLAGS="-I$BUILD_DIR/lb/include" LDFLAGS="-L$BUILD_DIR/lb/lib" CFLAGS="-O3 -fPIC" \
    ./configure --disable-shared --prefix=$BUILD_DIR/lb
make
make install
If you run into problems building freetype on Solaris, you may want to try to add the following at the end of the configure line:
GNUMAKE=gmake EGREP=egrep
Building libart_lgpl
cd $BUILD_DIR
wget
http://oss.oetiker.ch/rrdtool/pub/libs/libart_lgpl-2.3.17.tar.gz
tar zxvf libart_lgpl-2.3.17.tar.gz
cd libart_lgpl-2.3.17
env CFLAGS="-O3 -fPIC" ./configure --disable-shared --prefix=$BUILD_DIR/lb
make
make install
Now all the dependent libraries are built and you can try again. Since these are static libraries, you may have to use ranlib to make them accessible. Especially BSD systems like Mac OS X may require this, Linux and Solaris will do just fine without since their ar command does ranlibs job as well.
ranlib $BUILD_DIR/lb/lib/*.a
This time you tell configure where it should be looking for libraries and include files. This is done via environment variables. Depending on the shell you are running, the syntax for setting environment variables is different. Under csh/tcsh you use:
set IR=-I$BUILD_DIR/lb/include
setenv CPPFLAGS "$IR $IR/libart-2.0 $IR/freetype2 $IR/libpng"
setenv LDFLAGS  -L$BUILD_DIR/lb/lib
setenv CFLAGS -O3
If you are running bash/sh/ash/ksh/zsh use this:
IR=-I$BUILD_DIR/lb/include
CPPFLAGS="$IR $IR/libart-2.0 $IR/freetype2 $IR/libpng"
LDFLAGS="-L$BUILD_DIR/lb/lib"
CFLAGS=-O3
export CPPFLAGS LDFLAGS CFLAGS
And finally try building again. We disable the python and tcl bindings because it seems that a fair number of people have ill configured python and tcl setups that would prevent rrdtool from building if they are included in their current state.
cd $BUILD_DIR/rrdtool-1.2.13
./configure --prefix=$INSTALL_DIR --disable-python --disable-tcl
make clean
make
make install



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