pcap-config.1

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.TH PCAP\-CONFIG 1 "17 April 2023"
.SH NAME
pcap-config \- write libpcap compiler and linker flags to standard output
.SH SYNOPSIS
.na
.B pcap-config
[
.B \-\-help
]
[
.B \-\-version
]
[
.B \-\-cflags
]
.ti +12
[
.B \-\-libs
|
.B \-\-additional\-libs
]
.ti +12
[
.B \-\-static
|
.B \-\-static\-pcap\-only
]
.ad

.SH DESCRIPTION
.LP
.I pcap\-config
writes to the standard output various compiler and linker flags required to
build a user program with libpcap.  By default, it writes flags appropriate
for building with a dynamically\-linked version of libpcap; see below
for static linking.  Depending on the manner of libpcap installation, some
options or their combinations may produce empty output \- this is by design.

.SH OPTIONS
.TP
.B \-\-help
Produce a help message and exit.

.TP
.B \-\-version
Produce libpcap version and exit.  The version is the contents of
.I VERSION
file in libpcap source tree rather than the result of
.BR \%pcap_lib_version (3PCAP).

.TP
.B \-\-cflags
Produce the
.B \-I
compiler flag required to include libpcap's header files.

.TP
.B \-\-libs
Produce the
.B \-L
and
.B \-l
linker flags required to link with libpcap, including
.B \-l
flags for libraries required by libpcap.

.TP
.B \-\-additional\-libs
Produce the
.B \-L
and
.B \-l
linker flags for libraries required by libpcap, but not the
.B \-l
flag to link with libpcap itself.

.TP
.B \-\-static
This option causes
.B \-\-libs
and
.B \-\-additional\-libs
to produce linker flags appropriate for static linking with libpcap.

.TP
.B \-\-static\-pcap\-only
This option causes
.B \-\-libs
and
.B \-\-additional\-libs
to produce linker flags appropriate for static linking with libpcap and
dynamic linking with all other libraries, including libraries required by
libpcap.

.SH EXIT STATUS
.I pcap\-config
exits with a non-zero status when invoked with an invalid command\-line
option, and with status 0 otherwise.

.SH BACKWARD COMPATIBILITY
.PP
Before libpcap release 1.10.2
.I pcap\-config
did not treat invalid command\-line options as an error. The
.B \-\-static\-pcap\-only
flag became available in libpcap release 1.10.2.  The
.B \-\-static
flag became available in libpcap release 1.1.0.

.SH SEE ALSO
.BR pkg\-config (1),
.BR pcap (3PCAP)