@@ -329,6 +329,7 @@ case "$host" in

 		AM_CONDITIONAL([TARGET_LINUX], [true])

 		AC_DEFINE_UNQUOTED([TARGET_PREFIX], ["L"], [Target prefix])

 		have_sitnl="yes"

+		pkg_config_required="yes"

 		;;

 	*-*-solaris*)

 		AC_DEFINE([TARGET_SOLARIS], [1], [Are we running on Solaris?])

@@ -382,6 +383,16 @@ esac

 AM_CONDITIONAL([CROSS_COMPILING], test "${cross_compiling}" = "yes")

 PKG_PROG_PKG_CONFIG

+# Add variable to print if pkg-config is found or not. Users often miss that

+if test "${PKG_CONFIG}" = ""; then

+	if test "${pkg_config_required}" = "yes"; then

+		AC_MSG_ERROR([pkg-config is required])

+	fi

+	pkg_config_found="(not found)"

+else

+	pkg_config_found="(${PKG_CONFIG})"

+fi

+

 AC_PROG_CPP

 AC_PROG_INSTALL

 AC_PROG_LN_S

@@ -819,7 +830,7 @@ if test "$enable_dco" != "no"; then

 					  [libnl-genl-3.0 >= 3.4.0],

 					  [have_libnl="yes"],

 					  [

-					   AC_MSG_ERROR([libnl-genl-3.0 package not found or too old. Is the development package and pkg-config installed? Must be version 3.4.0 or newer for DCO])

+					   AC_MSG_ERROR([libnl-genl-3.0 package not found or too old. Is the development package and pkg-config ${pkg_config_found} installed? Must be version 3.4.0 or newer for DCO])

 					  ]

 				)

 				CFLAGS="${CFLAGS} ${LIBNL_GENL_CFLAGS}"

@@ -863,10 +874,11 @@ dnl Depend on libcap-ng on Linux

 dnl

 case "$host" in

 	*-*-linux*)

+		# We require pkg-config

 		PKG_CHECK_MODULES([LIBCAPNG],

 				  [libcap-ng],

 				  [],

-				  [AC_MSG_ERROR([libcap-ng package not found. Is the development package and pkg-config installed?])]

+				  [AC_MSG_ERROR([libcap-ng package not found. Is the development package and pkg-config ${pkg_config_found} installed?])]

 		)

 		AC_CHECK_HEADER([sys/prctl.h],,[AC_MSG_ERROR([sys/prctl.h not found!])])

@@ -887,7 +899,7 @@ if test "${with_crypto_library}" = "openssl"; then

 			[OPENSSL],

 			[openssl >= 1.0.2],

 			[have_openssl="yes"],

-			[] # If this fails, we will do another test next

+			[AC_MSG_WARN([OpenSSL not found by pkg-config ${pkg_config_found}])] # If this fails, we will do another test next

 		)

 		OPENSSL_LIBS=${OPENSSL_LIBS:--lssl -lcrypto}

 	fi

@@ -1070,7 +1082,7 @@ elif test "${with_crypto_library}" = "wolfssl"; then

 			[WOLFSSL],

 			[wolfssl],

 			[],

-			[AC_MSG_ERROR([Could not find wolfSSL.])]

+			[AC_MSG_ERROR([Could not find wolfSSL using pkg-config ${pkg_config_found}])]

 		)

 		PKG_CHECK_VAR(

 			[WOLFSSL_INCLUDEDIR],

@@ -1478,7 +1490,7 @@ AC_ARG_ENABLE(

 PKG_CHECK_MODULES(

 	[CMOCKA], [cmocka],

 	[have_cmocka="yes"],

-	[AC_MSG_WARN([cmocka.pc not found on the system.  Unit tests disabled])]

+	[AC_MSG_WARN([cmocka.pc not found on the system using pkg-config ${pkg_config_found}.  Unit tests disabled])]

 )

 AM_CONDITIONAL([ENABLE_UNITTESTS], [test "${enable_unit_tests}" = "yes" -a "${have_cmocka}" = "yes" ])

 AC_SUBST([ENABLE_UNITTESTS])