Beyond Linux® From Scratch (systemd Edition) - Version 11.2

Chapter 9. General Libraries

Pth-2.0.7

Introduction to Pth

The Pth package contains a very portable POSIX/ANSI-C based library for Unix platforms which provides non-preemptive priority-based scheduling for multiple threads of execution (multithreading) inside event-driven applications. All threads run in the same address space of the server application, but each thread has its own individual program-counter, run-time stack, signal mask and errno variable.

This package is known to build and work properly using an LFS-11.2 platform.

Package Information

Pth Dependencies

Optional

GCC-12.2.0 (for gfortran) and libnsl-2.0.0

User Notes: https://wiki.linuxfromscratch.org/blfs/wiki/pth

Installation of Pth

[Caution]

Caution

Don't add the --enable-pthread parameter to the configure command below else you will overwrite the pthread library and interface header installed by the Glibc package in LFS.

Install Pth by running the following commands: 

sed -i 's#$(LOBJS): Makefile#$(LOBJS): pth_p.h Makefile#' Makefile.in &&
./configure --prefix=/usr           \
            --disable-static        \
            --mandir=/usr/share/man &&
make

To test the results, issue: make test.

Now, as the root user: 

make install &&
install -v -m755 -d /usr/share/doc/pth-2.0.7 &&
install -v -m644    README PORTING SUPPORT TESTS \
                    /usr/share/doc/pth-2.0.7

Command Explanations

sed -i 's#$(LOBJS) ...: This sed fixes a race condition in the Makefile. It allows running make with multiple jobs (e.g., make -j4).

--disable-static: This switch prevents installation of static versions of the libraries.

--mandir=/usr/share/man: This switch puts the man pages in /usr/share/man instead of /usr/man.

Contents

Installed Program: pth-config
Installed Library: libpth.so
Installed Directory: /usr/share/doc/pth-2.0.7

Short Descriptions

pth-config

is a utility used to configure and build applications based on the pth(3) library. It can be used to query the C compiler and linker flags which are required to correctly compile and link the application against the pth(3) library

libpth.so

contains the API functions used by the GNU Portable Threads Library