Installing spandsp

This guide provides instructions for installing the spandsp library along with their development dependencies.

Spandsp is a library that provides DSP (Digital Signal Processing) capabilities, specifically targeting telecommunications applications. It is a low-level signal processing library that modulates and demodulates signals commonly used in telephony, such as the "noise" generated by a fax modem or DTMF touchpad.

warning

Ensure that you have development tools like gcc, make, autoconf, and automake installed on your system. You may also need some additional libraries (e.g., libtiff, libjpeg, etc.) depending on what spandsp requires.

tip

After installation, if you're unable to use the library or load it correctly, you might need to adjust your library path using sudo ldconfig. This command refreshes the linker cache so that the system can locate newly installed libraries.

Installation Steps:

Navigate to /usr/local/src directory.
```
cd /usr/local/src
```

Clone the spandsp repository:

git clone https://github.com/freeswitch/spandsp.git

Navigating into the Directory:
```
cd spandsp/
```
Checkout the fs branch:
```
git checkout fs
```
Building the Project:
```
./bootstrap.sh && ./configure && make && sudo make install
```
- ./bootstrap.sh: This script prepares the build environment (e.g., running autoconf, automake, etc.).
- ./configure: This script checks for system dependencies and sets up the makefile configuration for your environment.
- make: This compiles the source code into binary files.
- sudo make install: This installs the compiled library on your system (typically to /usr/local/lib, /usr/local/include, etc.).
Verify Installation You can verify the library installation using any of below methods provided it is supported on your system:
- Using ldconfig: ldconfig maintains the cache of shared libraries. You can use it to search for spandsp library in the system.
```
ldconfig
```
```
ldconfig -p | grep spandsp
```
- Using find: You can also search for spandsp library file like this:
```
find /usr/local/lib /usr/lib /lib -name "libspandsp*"
```
- Using pkg-config (if supported): Many libraries include a .pc file for pkg-config, which can be used to check if the library is installed and find information about it.
```
pkg-config --exists spandsp && echo "spandsp is installed" || echo "spandsp is not installed"
```
- Using Header files: You can also check if the header files (needed for development) are installed. These are usually installed in /usr/include/ or /usr/local/include/.
```
find /usr/include /usr/local/include -name "spandsp*"
```