Beyond Linux® From Scratch - Version 7.9

Chapter 17. Networking Libraries

cURL-7.47.1

Introduction to cURL

The cURL package contains a utility and a library used for transferring files with URL syntax to any of the following protocols: FTP, FTPS, HTTP, HTTPS, SCP, SFTP, TFTP, TELNET, DICT, LDAP, LDAPS and FILE. Its ability to both download and upload files can be incorporated into other programs to support functions like streaming media.

This package is known to build and work properly using an LFS-7.9 platform.

Package Information

  • Download (HTTP): https://curl.haxx.se/download/curl-7.47.1.tar.lzma

  • Download MD5 sum: 8242c073d8e5fc1c2a1aa946f1e903a4

  • Download size: 2.8 MB

  • Estimated disk space required: 56 MB (with tests)

  • Estimated build time: 0.4 SBU (additional 8.8 SBU for tests, with parallelism = 4)

cURL Dependencies

Recommended

Certificate Authority Certificates and OpenSSL-1.0.2g or GnuTLS-3.4.9

Optional

libidn-1.32, MIT Kerberos V5-1.14, OpenLDAP-2.4.44, Samba-4.3.4, c-ares, libmetalink, Libpsl, libssh2, nghttp2, mbed TLS (formerly known as PolarSSL), and SPNEGO

Optional for Running the Test Suite

stunnel-5.30 (for the HTTPS and FTPS tests) and Valgrind-3.11.0

User Notes: http://wiki.linuxfromscratch.org/blfs/wiki/curl

Installation of cURL

Install cURL by running the following commands: 

./configure --prefix=/usr              \
            --disable-static           \
            --enable-threaded-resolver &&
make

To run the test suite, issue: make test.

Now, as the root user: 

make install &&

cp -a docs docs-save       &&
rm -rf docs/examples/.deps &&

find docs \( -name Makefile\* \
          -o -name \*.1       \
          -o -name \*.3 \)    \
          -exec rm {} \;      &&
install -v -d -m755 /usr/share/doc/curl-7.47.1 &&
cp -v -R docs/*     /usr/share/doc/curl-7.47.1 &&

rm -rf docs &&
mv -i docs-save doc

Simple tests to the new installed curl: curl --trace-ascii debugdump.txt http://www.example.com/ and curl --trace-ascii d.txt --trace-time http://example.com/. Inspect the locally created trace files debugdump.txt and d.txt, which contain version downloaded files information, etc. One file has the time for each action logged.

Command Explanations

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

--enable-threaded-resolver: This switch enables cURL's builtin threaded DNS resolver.

--with-gssapi: This parameter adds Kerberos 5 support to libcurl.

--without-ssl --with-gnutls: Use to build with GnuTLS support instead of OpenSSL for SSL/TLS.

find docs ... -exec rm {} \;: This command removes Makefiles and man files from the documentation directory that would otherwise be installed by the commands that follow.

Contents

Installed Programs: curl and curl-config
Installed Library: libcurl.so
Installed Directories: /usr/include/curl and /usr/share/doc/curl-7.47.1

Short Descriptions

curl

is a command line tool for transferring files with URL syntax.

curl-config

prints information about the last compile, like libraries linked to and prefix setting.

libcurl.so

provides the API functions required by curl and other programs.

Last updated on 2016-02-21 12:38:55 -0800