Month: March 2008

Error When Compiling PHP in CentOS 64 Bit

Library files in CentOS 64 bit are stored in the directory /usr/lib64. But in normal 32 bit CentOS, library files are stored in /usr/lib so this causes a problem when trying to compile source code that looks for library files in /usr/lib. When using the default configure options for compiling PHP, the directory /usr/lib is searched for library files so if you have any 64 bit applications installed, their associated library files will not be found. For example, trying to compile PHP with the configure option:

--with-mysql=/usr

will result in the error:

/usr/bin/ld: cannot find -lmysqlclient

You can fix this MySQL error and other configure errors relating to library files not being found by adding the following option to the configure line:

--with-libdir=lib64

Code

How to Install VMWare Tools in CentOS 5

Install software needed by VMware Tools

1. Install packages to build the kernel modules

yum install gcc kernel-devel

2. Check the running kernel matches the kernel headers

uname -r             # running kernel
rpm -q kernel-devel  # installed kernel headers

3. If the two versions do not match, run

yum -y upgrade kernel kernel-devel
reboot

4. Find out where the kernel headers are (you may need this later)

ls -d /usr/src/kernels/$(uname -r)*/include

Prepare and install VMware Tools

1. From VMware Workstation: go to VM> Install VMware Tools

2. From the VM: mount the virtual cd drive

mount /dev/cdrom /mnt/

3. Extract VMware Tools to /tmp/

tar -C /tmp -zxvf /mnt/VMwareTools-5.5.3-34685.tar.gz

4. Unmount the virtual cd drive

umount /mnt

5. Now run the installer

cd /tmp/vmware-tools-distrib
./vmware-install.pl

6. When asked Do you want to run vmware-config-tools.pl?, answer “Yes”.

VMWare Infrastructure

How To Determine Dynamic Library Dependencies For An Executable or Library File in OS X

This script uses otool -L to determine and print all dynamic library dependencies of a given executable or library file recursively and you use it like this:

$ checklibs.pl /bin/ls
   /bin/ls:
            /usr/lib/libgcc_s.1.dylib
            /usr/lib/libncurses.5.4.dylib
            /usr/lib/libSystem.B.dylib
   /usr/lib/libgcc_s.1.dylib:
            /usr/lib/libSystem.B.dylib
   /usr/lib/libncurses.5.4.dylib:
            /usr/lib/libgcc_s.1.dylib
            /usr/lib/libSystem.B.dylib
   /usr/lib/libSystem.B.dylib:
            /usr/lib/system/libmathCommon.A.dylib

Here’s the script which was written by Marc Liyanage:

#!/usr/bin/perl
#
# Written by Marc Liyanage <http://www.entropy.ch>
# use strict;
use warnings; 

my ($file) = @ARGV;
die $! unless (-f $file); 

my $libs = {};
check_libs(file => $file, libs => $libs); 

print
	map {("\n$_:\n", map {"\t$_\n"} sort {lc($a) cmp lc($b)} @{$libs->{$_}})}
	sort {lc($a) cmp lc($b)}
	grep {@{$libs->{$_}}}
	keys(%$libs);
sub check_libs {
	my (%args) = @_;
	my $libs = $args{libs};
	my @file_libs = grep {$_ ne $args{file}} grep {$_} map {/^\s+(\S+)/} qx(otool -L $args{file});
	$libs->{$args{file}} = \@file_libs;
	foreach my $lib (grep {!$libs->{$_}} @file_libs) {
		unless (-f $lib) {
			$libs->{$lib} = ['(missing)'];
			next;
		}
		check_libs(%args, file => $lib);
	}
}

In case my blog software mangles the code above, you can download the script in a plain text file by clicking here: checklibs.zip

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