/usr/bin/c-icap-config is in libicapapi-dev 1:0.1.6-1ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 | #!/bin/sh
prefix=/usr
PKGLIBDIR=/usr/lib/c_icap/
LIBDIR=/usr/lib/
CONFIGDIR=/etc/c-icap/
DATADIR=/usr/share/c_icap/
#LOGDIR=
SOCKDIR=/var/run/c-icap
INCDIR=/usr/include/c_icap
VERSION=0.1.6
CICAPCFLAGS="-D_REENTRANT -g -O2 -Wall"
CICAPLDFLAGS=
CICAPLIBS=
CFLAGS="-D_REENTRANT -g -O2 -Wall -DCI_BUILD_MODULE"
LIBS=
LDFLAGS=""
usage() 
{
   cat <<EOTXT
Usage: c-icap-config [OPTIONS]
Where OPTION one of the following:
   --prefix             print c-icap instalation base directory
   --cflags		print preprocessor and compiler flags
   --libs		print linker flags
   --datarootdir	print the c-icap data directory
   --configdir		print the c-icap configuration directory
   --modulesdir		print the c-icap modules/plugins directory
   --version		print the c-icap server version
   --config		print the c-icap server compile configuration
EOTXT
}
case $1 in
    '--prefix')
        echo $prefix;
        ;;
    '--cflags')
        echo $CFLAGS" -I"$INCDIR;
        ;;
    '--libs')
       echo $LIBS;
       ;;
    '--datarootdir')
       echo $DATADIR;
       ;;
    '--configdir')
       echo $CONFIGDIR;
       ;;
    '--modulesdir')
       echo $PKGLIBDIR;
       ;;
    '--version')
       echo $VERSION;
       ;;
    '--config')
        echo "c-icap configuration";
	echo "c-icap version: "$VERSION;
        echo "c-icap installation prefix: "$prefix
	echo "c-icap configuration directory: "$CONFIGDIR;
	echo "c-icap modules/plugins directory: "$PKGLIBDIR;
	echo "c-icap shared data directory: "$DATADIR;
	echo ;
        echo "c-icap cflags for modules: "$CFLAGS;
        echo "c-icap libs for modules: "$LIBS;
       ;;
    *)
        usage
esac;
 |