tcpdump mailing list archives
Re: Fw: Building 32 bit libpcap on 64 bit OS
From: Guy Harris <guy () alum mit edu>
Date: Tue, 5 Jan 2010 23:42:45 -0800
On Jan 5, 2010, at 2:49 PM, Bryan W Budak wrote:
When building libpcap on 64 bit OS it is placed in the /usr/lib directory
If you build libpcap from our source code, it is installed, by default, in /usr/local/lib, not /usr/lib. You need special configuration options to install in /usr/lib.
rather than the /usr/lib64 This then causes the compile for a 32 bit version of my application to fail since there is a 64 bit version in a 32 bit directory. So, is there a way to build a 32 bit version of libpcap on 64 bit OS and install in /usr/lib?
The configure script has a --prefix option, but that would control where the header files go as well, e.g. "--prefix=/usr" to put the headers in /usr/include and the libraries in /usr/lib, rather than putting them in /usr/local/include and /usr/local/lib, respectively. If you are trying to install in standard system directories, rather than under /usr/local, try CFLAGS=<appropriate settings to build a 64-bit library> ./configure --prefix=/usr --libdir=/usr/lib64 to build 64-bit libraries and install them in /usr/lib64, and CFLAGS=<appropriate settings to build a 32-bit library> ./configure --prefix=/usr to build 32-bit libraries and install them in /usr/lib. Both will install the header files under /usr/include; the header files' contents don't differ between ILP32 and LP64. (You say "/usr/lib", so you're presumably discussing UN*X, and thus presumably don't have to worry about Windows-style LLP64.) (Of cource, there *are* OSes where the 32-bit and 64-bit versions are not only put in the same directory, but are put in the same *file*: $ file /usr/lib/libpcap.dylib /usr/lib/libpcap.dylib: Mach-O universal binary with 3 architectures /usr/lib/libpcap.dylib (for architecture x86_64): Mach-O 64-bit dynamically linked shared library x86_64 /usr/lib/libpcap.dylib (for architecture i386): Mach-O dynamically linked shared library i386 /usr/lib/libpcap.dylib (for architecture ppc7400): Mach-O dynamically linked shared library ppc but I digress. :-))- This is the tcpdump-workers list. Visit https://cod.sandelman.ca/ to unsubscribe.
Current thread:
- Fw: Building 32 bit libpcap on 64 bit OS Bryan W Budak (Jan 05)
- Re: Fw: Building 32 bit libpcap on 64 bit OS Guy Harris (Jan 05)