curl-config(1) User Commands curl-config(1)

NAME

curl-config - Get information about a libcurl installation

SYNOPSIS

curl-config [options]

DESCRIPTION

curl-config displays information about the curl and libcurl
installation.

OPTIONS

--ca Displays the built-in path to the CA cert bundle this libcurl
uses.

--cc Displays the compiler used to build libcurl.

--cflags
Set of compiler options (CFLAGS) to use when compiling files
that use libcurl. Currently that is only the include path to
the curl include files.

--checkfor [version]
Specify the oldest possible libcurl version string you want,
and this script returns 0 if the current installation is new
enough or it returns 1 and outputs a text saying that the
current version is not new enough. (Added in 7.15.4)

--configure
Displays the arguments given to configure when building curl.

--feature
Lists what particular main features the installed libcurl was
built with. At the time of writing, this list may include SSL,
KRB4 or IPv6. Do not assume any particular order. The keywords
are separated by newlines. There may be none, one, or several
keywords in the list.

--help Displays the available options.

--libs Shows the complete set of libs and other linker options you
need in order to link your application with libcurl.

--prefix
This is the prefix used when libcurl was installed. libcurl is
then installed in $prefix/lib and its header files are
installed in $prefix/include and so on. The prefix is set with
"configure --prefix".

--protocols
Lists what particular protocols the installed libcurl was
built to support. At the time of writing, this list may
include HTTP, HTTPS, FTP, FTPS, FILE, TELNET, LDAP, DICT and
many more. Do not assume any particular order. The protocols
are listed using uppercase and are separated by newlines.
There may be none, one, or several protocols in the list.
(Added in 7.13.0)

--ssl-backends
Lists the SSL backends that were enabled when libcurl was
built. It might be no, one or several names. If more than one
name, they appear comma-separated. (Added in 7.58.0)

--static-libs
Shows the complete set of libs and other linker options you
need in order to link your application with libcurl
statically. (Added in 7.17.1)

--version
Outputs version information about the installed libcurl.

--vernum
Outputs version information about the installed libcurl, in
numerical mode. This shows the version number, in
hexadecimal, using 8 bits for each part: major, minor, and
patch numbers. This makes libcurl 7.7.4 appear as 070704 and
libcurl 12.13.14 appear as 0c0d0e... Note that the initial
zero might be omitted. (This option was broken in the 7.15.0
release.)

EXAMPLES

What linker options do I need when I link with libcurl?
$ curl-config --libs
What compiler options do I need when I compile using libcurl
functions?
$ curl-config --cflags
How do I know if libcurl was built with SSL support?
$ curl-config --feature | grep SSL
What's the installed libcurl version?
$ curl-config --version
How do I build a single file with a one-line command?
$ `curl-config --cc --cflags` -o example source.c `curl-config --libs`

SEE ALSO

curl(1)

curl-config 2025-02-25 curl-config(1)