diff --git a/configure.ac b/configure.ac
index 166121f..d23ad78 100644
--- a/configure.ac
+++ b/configure.ac
@@ -39,6 +39,10 @@ AC_TYPE_UINTPTR_T
 LT_PREREQ([2.2.6])
 LT_INIT()
 
+# pkg-config
+PKG_PROG_PKG_CONFIG
+PKG_INSTALLDIR
+
 # other programs
 AC_PROG_INSTALL
 
@@ -76,40 +80,13 @@ AC_CHECK_FUNCS([wcslcat wcslcmp wcslcpy])
 # Extra libraries
 #
 
-# cryb-core
-save_LIBS="${LIBS}"
-LIBS=""
-AC_SEARCH_LIBS([cryb_core_version], [cryb-core], [
-  CRYB_CORE_LIBS="${LIBS}"
-], [
-  AC_MSG_ERROR([cryb-core library not found])
-])
-LIBS="${save_LIBS}"
-AC_SUBST(CRYB_CORE_LIBS)
-
-# cryb-oath
-save_LIBS="${LIBS}"
-LIBS=""
-AC_SEARCH_LIBS([cryb_oath_version], [cryb-oath], [
-  CRYB_OATH_LIBS="${LIBS}"
-], [
-  AC_MSG_ERROR([cryb-oath library not found])
-])
-LIBS="${save_LIBS}"
-AC_SUBST(CRYB_OATH_LIBS)
-
-# cryb-test
-save_LIBS="${LIBS}"
-LIBS=""
-AC_SEARCH_LIBS([cryb_test_version], [cryb-test], [
-  CRYB_TEST_LIBS="${LIBS}"
-], [
-  CRYB_TEST_LIBS=""
-  AC_MSG_WARN([cryb-test library not found, unit tests disabled])
-])
-LIBS="${save_LIBS}"
-AC_SUBST(CRYB_TEST_LIBS)
-AM_CONDITIONAL([WITH_CRYB_TEST], [ test x"$CRYB_TEST_LIBS" != x"" ])
+# Cryb.to components
+PKG_HAVE_WITH_MODULES([CRYB_CORE], [cryb-core],
+  [Cryb.to core utilities])
+PKG_HAVE_WITH_MODULES([CRYB_OATH], [cryb-oath],
+  [Cryb.to Open Authentication primitives])
+PKG_HAVE_WITH_MODULES([CRYB_TEST], [cryb-test],
+  [Cryb.to test framework])
 
 # libpam
 save_LIBS="${LIBS}"
@@ -248,6 +225,7 @@ AC_CONFIG_FILES([
     include/cryb/Makefile
     lib/Makefile
     lib/otp/Makefile
+    lib/otp/cryb-otp.pc
     pam/Makefile
     pam/pam_otp/Makefile
     libexec/Makefile
diff --git a/lib/otp/Makefile.am b/lib/otp/Makefile.am
index 378349b..02223c2 100644
--- a/lib/otp/Makefile.am
+++ b/lib/otp/Makefile.am
@@ -9,3 +9,5 @@ libcryb_otp_la_SOURCES = \
 libcryb_otp_la_LIBADD = \
 	$(CRYB_CORE_LIBS) \
 	$(CRYB_OATH_LIBS)
+
+pkgconfig_DATA = cryb-otp.pc
diff --git a/lib/otp/cryb-otp.pc.in b/lib/otp/cryb-otp.pc.in
new file mode 100644
index 0000000..cb872fc
--- /dev/null
+++ b/lib/otp/cryb-otp.pc.in
@@ -0,0 +1,11 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+includedir=@includedir@
+libdir=@libdir@
+
+Name: cryb-otp
+Description: Cryb.to one-time password library
+Version: @PACKAGE_VERSION@
+Cflags: -I${includedir}
+Libs: -L${libdir} -lcryb-otp
+Requires.private: cryb-core cryb-oath
diff --git a/t/Makefile.am b/t/Makefile.am
index 11d5efc..0cac1d9 100644
--- a/t/Makefile.am
+++ b/t/Makefile.am
@@ -2,7 +2,7 @@ AM_CPPFLAGS = -I$(top_srcdir)/include
 
 EXTRA_DIST =
 
-if WITH_CRYB_TEST
+if HAVE_CRYB_TEST
 
 libotp = $(top_builddir)/lib/otp/libcryb-otp.la
 
@@ -25,4 +25,4 @@ endif OTP_LIB
 
 check_PROGRAMS = $(TESTS)
 
-endif WITH_CRYB_TEST
+endif HAVE_CRYB_TEST