diff --git a/.gitignore b/.gitignore
index 050e5cfbe..a256a9a19 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 *.strhash.c
 docs/_*
 bencode.c
+config.mk
diff --git a/Makefile b/Makefile
index aaef6083b..baf422e5c 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,5 @@
 .DEFAULT_GOAL := all
 
-RTPENGINE_ROOT_DIR=.
 with_transcoding ?= yes
 
 ifeq ($(DO_ASAN_FLAGS),1)
@@ -20,6 +19,11 @@ export UBSAN_OPTIONS=print_stacktrace=1
 export G_SLICE=always-malloc
 endif
 
+export top_srcdir = $(CURDIR)
+
+# Initialize all flags, so that we only compute them once.
+include lib/deps.Makefile
+
 include lib/lib.Makefile
 
 .PHONY:	all distclean clean coverity
@@ -63,6 +67,7 @@ distclean clean:
 	$(MAKE) -C perf-tester clean
 	$(MAKE) -C kernel-module clean
 	$(MAKE) -C t clean
+	rm -f config.mk
 
 .DEFAULT:
 	$(MAKE) -C daemon $@
diff --git a/daemon/Makefile b/daemon/Makefile
index 51274b781..7a4293e6f 100644
--- a/daemon/Makefile
+++ b/daemon/Makefile
@@ -1,5 +1,9 @@
 TARGET=		rtpengine
 
+export top_srcdir = ..
+
+include ../lib/deps.Makefile
+
 with_iptables_option ?= yes
 with_transcoding ?= yes
 
@@ -11,36 +15,33 @@ CFLAGS:=	$(CFLAGS)
 endif
 CFLAGS+=	-pthread
 CFLAGS+=	-std=c11
-CFLAGS+=	$(shell pkg-config --cflags glib-2.0)
-CFLAGS+=	$(shell pkg-config --cflags gthread-2.0)
-CFLAGS+=	$(shell pkg-config --cflags zlib)
-CFLAGS+=	$(shell pkg-config --cflags openssl)
-CFLAGS+=	$(shell pkg-config --cflags libevent_pthreads)
-CFLAGS+=	-DPCRE2_CODE_UNIT_WIDTH=8
-CFLAGS+=	$(shell pkg-config --cflags libpcre2-8)
-CFLAGS+=	$(shell pkg-config xmlrpc_client --cflags 2> /dev/null || xmlrpc-c-config client --cflags)
-CFLAGS+=	$(shell pkg-config xmlrpc --cflags 2> /dev/null)
-CFLAGS+=	$(shell pkg-config xmlrpc_util --cflags 2> /dev/null)
-CFLAGS+=	$(shell pkg-config --cflags json-glib-1.0)
-CFLAGS+=	$(shell pkg-config --cflags libwebsockets)
-CFLAGS+=	$(shell pkg-config --cflags libnftnl)
-CFLAGS+=	$(shell pkg-config --cflags libmnl)
+CFLAGS+=	-I. -I../kernel-module/ -I../lib/ -I../include/
+CFLAGS+=	-D_GNU_SOURCE
+CFLAGS+=	$(CFLAGS_GLIB)
+CFLAGS+=	$(CFLAGS_GTHREAD)
+CFLAGS+=	$(CFLAGS_LIBZ)
+CFLAGS+=	$(CFLAGS_OPENSSL)
+CFLAGS+=	$(CFLAGS_LIBEVENT)
+CFLAGS+=	$(CFLAGS_LIBPCRE)
+CFLAGS+=	$(CFLAGS_XMLRPC)
+CFLAGS+=	$(CFLAGS_JSON_GLIB)
+CFLAGS+=	$(CFLAGS_LIBWEBSOCKETS)
+CFLAGS+=	$(CFLAGS_LIBNFTNL)
+CFLAGS+=	$(CFLAGS_LIBMNL)
 ifeq ($(with_iptables_option),yes)
-CFLAGS+=	$(shell pkg-config --cflags libiptc)
+CFLAGS+=	$(CFLAGS_LIBIPTC)
 CFLAGS+=	-DWITH_IPTABLES_OPTION
 endif
-CFLAGS+=	-I. -I../kernel-module/ -I../lib/ -I../include/
-CFLAGS+=	-D_GNU_SOURCE
 ifeq ($(with_transcoding),yes)
-CFLAGS+=	$(shell pkg-config --cflags libavcodec)
-CFLAGS+=	$(shell pkg-config --cflags libavformat)
-CFLAGS+=	$(shell pkg-config --cflags libavutil)
-CFLAGS+=	$(shell pkg-config --cflags libswresample)
-CFLAGS+=	$(shell pkg-config --cflags libavfilter)
-CFLAGS+=	$(shell pkg-config --cflags spandsp)
-CFLAGS+=	$(shell pkg-config --cflags opus)
+CFLAGS+=	$(CFLAGS_LIBAVCODEC)
+CFLAGS+=	$(CFLAGS_LIBAVFORMAT)
+CFLAGS+=	$(CFLAGS_LIBAVUTIL)
+CFLAGS+=	$(CFLAGS_LIBSWRESAMPLE)
+CFLAGS+=	$(CFLAGS_LIBAVFILTER)
+CFLAGS+=	$(CFLAGS_SPANDSP)
+CFLAGS+=	$(CFLAGS_OPUS)
 CFLAGS+=	-DWITH_TRANSCODING
-CFLAGS+=        $(shell mysql_config --cflags)
+CFLAGS+=	$(CFLAGS_MYSQL)
 else
 CFLAGS+=	-DWITHOUT_CODECLIB
 endif
@@ -53,42 +54,44 @@ endif
 #CFLAGS+=	-DSTRICT_SDES_KEY_LIFETIME
 
 LDLIBS:=	-lm -ldl
-LDLIBS+=	$(shell pkg-config --libs glib-2.0)
-LDLIBS+=	$(shell pkg-config --libs gthread-2.0)
-LDLIBS+=	$(shell pkg-config --libs zlib)
-LDLIBS+=	$(shell pkg-config --libs libpcre2-8)
-LDLIBS+=	$(shell pkg-config --libs libcrypto)
-LDLIBS+=	$(shell pkg-config --libs openssl)
-LDLIBS+=	$(shell pkg-config --libs libevent_pthreads)
-LDLIBS+=	-lpcap
-LDLIBS+=	$(shell pkg-config xmlrpc_client --libs 2> /dev/null || xmlrpc-c-config client --libs)
-LDLIBS+=	$(shell pkg-config xmlrpc --libs 2> /dev/null)
-LDLIBS+=	$(shell pkg-config xmlrpc_util --libs 2> /dev/null)
-LDLIBS+=	-lhiredis
-LDLIBS+=	$(shell pkg-config --libs json-glib-1.0)
-LDLIBS+=	$(shell pkg-config --libs libwebsockets)
-LDLIBS+=	$(shell pkg-config --libs libnftnl)
-LDLIBS+=	$(shell pkg-config --libs libmnl)
+LDLIBS+=	$(LDLIBS_GLIB)
+LDLIBS+=	$(LDLIBS_GTHREAD)
+LDLIBS+=	$(LDLIBS_LIBZ)
+LDLIBS+=	$(LDLIBS_LIBPCRE)
+LDLIBS+=	$(LDLIBS_LIBCRYPTO)
+LDLIBS+=	$(LDLIBS_OPENSSL)
+LDLIBS+=	$(LDLIBS_LIBEVENT)
+LDLIBS+=	$(LDLIBS_LIBPCAP)
+LDLIBS+=	$(LDLIBS_XMLRPC)
+LDLIBS+=	$(LDLIBS_LIBHIREDIS)
+LDLIBS+=	$(LDLIBS_JSON_GLIB)
+LDLIBS+=	$(LDLIBS_LIBWEBSOCKETS)
+LDLIBS+=	$(LDLIBS_LIBNFTNL)
+LDLIBS+=	$(LDLIBS_LIBMNL)
 ifeq ($(with_iptables_option),yes)
-LDLIBS+=	$(shell pkg-config --libs libiptc)
+LDLIBS+=	$(LDLIBS_LIBIPTC)
 endif
 ifeq ($(with_transcoding),yes)
-LDLIBS+=	$(shell pkg-config --libs libavcodec)
-LDLIBS+=	$(shell pkg-config --libs libavformat)
-LDLIBS+=	$(shell pkg-config --libs libavutil)
-LDLIBS+=	$(shell pkg-config --libs libswresample)
-LDLIBS+=	$(shell pkg-config --libs libavfilter)
-LDLIBS+=	$(shell pkg-config --libs spandsp)
-LDLIBS+=	$(shell pkg-config --libs opus)
-LDLIBS+=        $(shell mysql_config --libs)
+LDLIBS+=	$(LDLIBS_LIBAVCODEC)
+LDLIBS+=	$(LDLIBS_LIBAVFORMAT)
+LDLIBS+=	$(LDLIBS_LIBAVUTIL)
+LDLIBS+=	$(LDLIBS_LIBSWRESAMPLE)
+LDLIBS+=	$(LDLIBS_LIBAVFILTER)
+LDLIBS+=	$(LDLIBS_SPANDSP)
+LDLIBS+=	$(LDLIBS_OPUS)
+LDLIBS+=	$(LDLIBS_MYSQL)
 endif
 
 ifeq ($(with_transcoding),yes)
-include ../lib/g729.Makefile
-include ../lib/codec-chain.Makefile
+CFLAGS+=	$(CFLAGS_BCG729)
+LDLIBS+=	$(LDLIBS_BCG729)
+
+CFLAGS+=	$(CFLAGS_CODEC_CHAIN)
+LDLIBS+=	$(LDLIBS_CODEC_CHAIN)
 endif
 
-include ../lib/mqtt.Makefile
+CFLAGS+=	$(CFLAGS_MQTT)
+LDLIBS+=	$(LDLIBS_MQTT)
 
 SRCS=		main.c kernel.c helpers.c control_tcp.c call.c control_udp.c redis.c \
 		cookie_cache.c udp_listener.c control_ng_flags_parser.c control_ng.strhash.c sdp.strhash.c stun.c rtcp.c \
diff --git a/debian/ngcp-rtpengine-kernel-dkms.install b/debian/ngcp-rtpengine-kernel-dkms.install
index 1b046efbc..aa79ef266 100644
--- a/debian/ngcp-rtpengine-kernel-dkms.install
+++ b/debian/ngcp-rtpengine-kernel-dkms.install
@@ -2,3 +2,4 @@ kernel-module/*.c	usr/src/${env:DEB_SOURCE}-${env:DEB_VERSION_UPSTREAM}
 kernel-module/*.h	usr/src/${env:DEB_SOURCE}-${env:DEB_VERSION_UPSTREAM}
 kernel-module/*.inc	usr/src/${env:DEB_SOURCE}-${env:DEB_VERSION_UPSTREAM}
 kernel-module/Makefile	usr/src/${env:DEB_SOURCE}-${env:DEB_VERSION_UPSTREAM}
+kernel-module/gen-*	usr/src/${env:DEB_SOURCE}-${env:DEB_VERSION_UPSTREAM}
diff --git a/kernel-module/.gitignore b/kernel-module/.gitignore
index fc5e8de35..f3e89fc5e 100644
--- a/kernel-module/.gitignore
+++ b/kernel-module/.gitignore
@@ -4,5 +4,6 @@
 *.mod.c
 modules.order
 Module.symvers
+rtpengine.mk
 .*.cmd
 xt_RTPENGINE.mod
diff --git a/kernel-module/Makefile b/kernel-module/Makefile
index 70d0a5599..161c4513e 100644
--- a/kernel-module/Makefile
+++ b/kernel-module/Makefile
@@ -1,27 +1,11 @@
-PWD    := $(shell pwd)
 KSRC   ?= /lib/modules/$(shell uname -r)/build
 KBUILD := $(KSRC)
-M      ?= $(PWD)
-
-ifeq ($(RTPENGINE_VERSION),)
-  DPKG_PRSCHNGLG := $(shell which dpkg-parsechangelog 2>/dev/null)
-  DEB_CHANGELOG := $(shell test -f $(M)/../debian/changelog && echo $(M)/../debian/changelog || echo $(M)/debian/changelog)
-  ifneq ($(DPKG_PRSCHNGLG),)
-    DPKG_PRSCHNGLG := $(shell dpkg-parsechangelog -l$(DEB_CHANGELOG) | awk '/^Version: / {print $$2}')
-  endif
-  GIT_BR_COMMIT := git-$(shell cd $(M) && git rev-parse --abbrev-ref --symbolic-full-name HEAD 2> /dev/null)-$(shell cd $(M) && git rev-parse --short HEAD 2> /dev/null)
-
-  ifneq ($(DPKG_PRSCHNGLG),)
-    RTPENGINE_VERSION+=$(DPKG_PRSCHNGLG)
-  endif
-  ifneq ($(GIT_BR_COMMIT),git--)
-    RTPENGINE_VERSION+=$(GIT_BR_COMMIT)
-  endif
-
-  ifeq ($(RTPENGINE_VERSION),)
-    RTPENGINE_VERSION+=undefined
-  endif
-endif
+M      ?= $(CURDIR)
+
+export M
+
+include rtpengine-kmod.mk
+
 EXTRA_CFLAGS+=	-DRTPENGINE_VERSION="\"$(RTPENGINE_VERSION)\""
 
 obj-m        += xt_RTPENGINE.o
@@ -29,14 +13,18 @@ obj-m        += xt_RTPENGINE.o
 .PHONY:		modules clean patch install
 
 modules:
-		$(MAKE) -C $(KBUILD) M=$(PWD) O=$(KBUILD) modules
+		$(MAKE) -C $(KBUILD) M=$(CURDIR) O=$(KBUILD) modules
 
 clean:
-		$(MAKE) -C $(KBUILD) M=$(PWD) clean || true
+		$(MAKE) -C $(KBUILD) M=$(CURDIR) clean || true
+		rm -f rtpengine-kmod.mk
 
 patch:
-		../utils/patch-kernel magic "$(PWD)" "$(KERNEL)" "$(RTPENGINE_VERSION)"
+		../utils/patch-kernel magic "$(CURDIR)" "$(KERNEL)" "$(RTPENGINE_VERSION)"
 
 install:
 	install -D xt_RTPENGINE.ko $(DESTDIR)/lib/modules/$(shell uname -r)/updates/xt_RTPENGINE.ko
 	depmod -a
+
+rtpengine-kmod.mk:
+	./gen-rtpengine-kmod-flags >$@
diff --git a/kernel-module/gen-rtpengine-kmod-flags b/kernel-module/gen-rtpengine-kmod-flags
new file mode 100755
index 000000000..dda476e1b
--- /dev/null
+++ b/kernel-module/gen-rtpengine-kmod-flags
@@ -0,0 +1,33 @@
+#!/bin/bash
+
+if [ -z "${M}" ]; then
+  M=$(pwd)
+fi
+
+if [ -z "${RTPENGINE_VERSION}" ]; then
+  have_dpkg_parsechangelog=no
+  if command -v dpkg-parsechangelog >/dev/null; then
+    have_dpkg_parsechangelog=yes
+  fi
+  if [ -f "${M}/../debian/changelog" ]; then
+    deb_changelog="${M}/../debian/changelog"
+  else
+    deb_changelog="${M}/debian/changelog"
+  fi
+  if [ "${have_dpkg_parsechangelog}" = yes ]; then
+    deb_version="$(dpkg-parsechangelog -l${deb_changelog} | awk '/^Version: / {print $$2}')"
+  fi
+  git_br_commit="git-$(cd ${M} && git rev-parse --abbrev-ref --symbolic-full-name HEAD 2> /dev/null)-$(cd ${M} && git rev-parse --short HEAD 2> /dev/null)"
+
+  if [ "${have_dpkg_parsechangelog}" = yes ]; then
+    RTPENGINE_VERSION+=" ${deb_version}"
+  fi
+  if [ "${git_br_commit}" != "git--" ]; then
+    RTPENGINE_VERSION+=" ${git_br_commit}"
+  fi
+
+  if [ -z "${RTPENGINE_VERSION}" ]; then
+    RTPENGINE_VERSION="undefined"
+  fi
+  echo "RTPENGINE_VERSION := ${RTPENGINE_VERSION}"
+fi
diff --git a/lib/codec-chain.Makefile b/lib/codec-chain.Makefile
deleted file mode 100644
index 6cf796d5e..000000000
--- a/lib/codec-chain.Makefile
+++ /dev/null
@@ -1,7 +0,0 @@
-ifneq (,$(filter pkg.ngcp-rtpengine.codec-chain,${DEB_BUILD_PROFILES}))
-ifneq (,$(wildcard $(CODEC_CHAIN_HOME)/usr/include/codec-chain/client.h))
-CFLAGS+=	-DHAVE_CODEC_CHAIN -I$(CODEC_CHAIN_HOME)/usr/include
-else ifneq (,$(wildcard /usr/include/codec-chain/client.h))
-CFLAGS+=	-DHAVE_CODEC_CHAIN
-endif
-endif
diff --git a/lib/deps.Makefile b/lib/deps.Makefile
new file mode 100644
index 000000000..d3564146c
--- /dev/null
+++ b/lib/deps.Makefile
@@ -0,0 +1,12 @@
+# Define build flags for used dependencies.
+
+$(top_srcdir)/config.mk:
+	$(top_srcdir)/utils/gen-common-flags >$@
+ifeq (,$(filter pkg.ngcp-rtpengine.nobcg729,${DEB_BUILD_PROFILES}))
+	$(top_srcdir)/utils/gen-bcg729-flags >>$@
+endif
+ifneq (,$(filter pkg.ngcp-rtpengine.codec-chain,${DEB_BUILD_PROFILES}))
+	$(top_srcdir)/utils/gen-codec-chain-flags >>$@
+endif
+
+include $(top_srcdir)/config.mk
diff --git a/lib/g729.Makefile b/lib/g729.Makefile
deleted file mode 100644
index abeef264a..000000000
--- a/lib/g729.Makefile
+++ /dev/null
@@ -1,58 +0,0 @@
-ifeq (,$(filter pkg.ngcp-rtpengine.nobcg729,${DEB_BUILD_PROFILES}))
-# look for bcg729
-# system pkg-config
-have_bcg729 := $(shell pkg-config --exists libbcg729 && echo yes)
-ifeq ($(have_bcg729),yes)
-bcg729_inc := $(shell pkg-config --cflags libbcg729)
-bcg729_lib := $(shell pkg-config --libs libbcg729)
-else
-# system generic
-ifneq (,$(wildcard /usr/include/bcg729/decoder.h))
-have_bcg729 := yes
-bcg729_lib := -lbcg729
-else
-# /usr/src
-ifneq (,$(wildcard /usr/src/bcg729/include/bcg729/decoder.h))
-have_bcg729 := yes
-bcg729_inc := -I/usr/src/bcg729/include/
-bcg729_lib := -L/usr/src/bcg729/src/ -lbcg729
-else
-# rfuchs dev
-ifneq (,$(wildcard $(HOME)/src/bcg729/include/bcg729/decoder.h))
-have_bcg729 := yes
-bcg729_inc := -I$(HOME)/src/bcg729/include/
-bcg729_lib := -L$(HOME)/src/bcg729/src/ -lbcg729
-else
-# home directory
-ifneq (,$(wildcard $(HOME)/bcg729/include/bcg729/decoder.h))
-have_bcg729 := yes
-bcg729_inc := -I$(HOME)/bcg729/include/
-bcg729_lib := -L$(HOME)/bcg729/src/ -lbcg729
-else
-# included toplevel
-ifneq (,$(wildcard ../bcg729/include/bcg729/decoder.h))
-have_bcg729 := yes
-bcg729_inc := -I../bcg729/include/
-bcg729_lib := -L../bcg729/src/ -lbcg729
-else
-# /usr/local/include when installing from git
-ifneq (,$(wildcard /usr/local/include/bcg729/decoder.h))
-have_bcg729 := yes
-bcg729_inc := -I/usr/local/include/
-bcg729_lib := -L/usr/local/lib64/ -lbcg729
-endif
-endif
-endif
-endif
-endif
-endif
-endif
-endif
-
-ifeq ($(have_bcg729),yes)
-CFLAGS+=	-DHAVE_BCG729
-CFLAGS+=	$(bcg729_inc)
-endif
-ifeq ($(have_bcg729),yes)
-LDLIBS+=	$(bcg729_lib)
-endif
diff --git a/lib/lib.Makefile b/lib/lib.Makefile
index ddd2bb61d..83df96cac 100644
--- a/lib/lib.Makefile
+++ b/lib/lib.Makefile
@@ -1,56 +1,14 @@
 CC ?= gcc
 
-
-ifeq ($(RTPENGINE_ROOT_DIR),)
-	RTPENGINE_ROOT_DIR=..
-endif
-
-HAVE_DPKG_PARSECHANGELOG := $(shell which dpkg-parsechangelog 2>/dev/null)
-
-ifeq ($(RELEASE_DATE),)
-  ifneq ($(HAVE_DPKG_PARSECHANGELOG),)
-    RELEASE_DATE := $(shell date -u -d "@$$(dpkg-parsechangelog -l$(RTPENGINE_ROOT_DIR)/debian/changelog -STimestamp)" '+%F')
-  endif
-  ifeq ($(RELEASE_DATE),)
-    RELEASE_DATE := undefined
-  endif
-endif
-
-ifeq ($(RTPENGINE_VERSION),)
-  ifneq ($(HAVE_DPKG_PARSECHANGELOG),)
-    DPKG_PRSCHNGLG := $(shell dpkg-parsechangelog -l$(RTPENGINE_ROOT_DIR)/debian/changelog | awk '/^Version: / {print $$2}')
-  endif
-  GIT_BR_COMMIT := git-$(shell git rev-parse --abbrev-ref --symbolic-full-name HEAD 2> /dev/null)-$(shell git rev-parse --short HEAD 2> /dev/null)
-
-  ifneq ($(DPKG_PRSCHNGLG),)
-    RTPENGINE_VERSION+=$(DPKG_PRSCHNGLG)
-  endif
-  ifneq ($(GIT_BR_COMMIT),git--)
-    RTPENGINE_VERSION+=$(GIT_BR_COMMIT)
-  endif
-
-  ifeq ($(RTPENGINE_VERSION),)
-    RTPENGINE_VERSION+=undefined
-  endif
-endif
 CFLAGS+=	-DRTPENGINE_VERSION="\"$(RTPENGINE_VERSION)\""
 
-# look for libsystemd
-have_libsystemd := $(shell pkg-config --exists libsystemd && echo yes)
-ifeq ($(have_libsystemd),yes)
-CFLAGS+=	$(shell pkg-config --cflags libsystemd)
-CFLAGS+=	-DHAVE_LIBSYSTEMD
-LDLIBS+=	$(shell pkg-config --libs libsystemd)
-endif
+CFLAGS+=	$(CFLAGS_LIBSYSTEMD)
+LDLIBS+=	$(LDLIBS_LIBSYSTEMD)
 
 # look for liburing
 ifeq (,$(filter pkg.ngcp-rtpengine.nouring,${DEB_BUILD_PROFILES}))
-have_liburing := $(shell pkg-config --atleast-version=2.3 liburing && echo yes)
-ifeq ($(have_liburing),yes)
-CFLAGS+=	$(shell pkg-config --cflags liburing)
-CFLAGS+=	-DHAVE_LIBURING
-LDLIBS+=	$(shell pkg-config --libs liburing)
-endif
+CFLAGS+=	$(CFLAGS_LIBURING)
+LDLIBS+=	$(LDLIBS_LIBURING)
 endif
 
 ifeq ($(DBG),yes)
@@ -62,15 +20,9 @@ LDFLAGS += -rdynamic
 
 ifneq ($(DBG),yes)
   ifeq (,$(filter $(CFLAGS),-O0))
-    DPKG_BLDFLGS := $(shell which dpkg-buildflags 2>/dev/null)
-    ifneq ($(DPKG_BLDFLGS),)
-      # support http://wiki.debian.org/Hardening for >=wheezy
-      CFLAGS+=	$(shell dpkg-buildflags --get CFLAGS)
-      CPPFLAGS+=	$(shell dpkg-buildflags --get CPPFLAGS)
-      LDFLAGS+=	$(shell dpkg-buildflags --get LDFLAGS)
-    endif
-    CFLAGS+=-O3 -flto=auto -ffat-lto-objects
-    LDFLAGS+=-flto=auto
+    CFLAGS+=	$(CFLAGS_DEFAULT)
+    CPPFLAGS+=	$(CPPFLAGS_DEFAULT)
+    LDFLAGS+=	$(LDFLAGS_DEFAULT)
   endif
 endif
 
diff --git a/lib/mqtt.Makefile b/lib/mqtt.Makefile
deleted file mode 100644
index 37d687442..000000000
--- a/lib/mqtt.Makefile
+++ /dev/null
@@ -1,10 +0,0 @@
-have_mqtt := $(shell pkg-config --exists libmosquitto && echo yes)
-ifeq ($(have_mqtt),yes)
-mqtt_inc := $(shell pkg-config --cflags libmosquitto)
-mqtt_lib := $(shell pkg-config --libs libmosquitto)
-CFLAGS+=	-DHAVE_MQTT
-CFLAGS+=	$(mqtt_inc)
-endif
-ifeq ($(have_mqtt),yes)
-LDLIBS+=	$(mqtt_lib)
-endif
diff --git a/perf-tester/Makefile b/perf-tester/Makefile
index fa7a50c7c..e97a017b0 100644
--- a/perf-tester/Makefile
+++ b/perf-tester/Makefile
@@ -1,5 +1,9 @@
 TARGET = rtpengine-perftest
 
+export top_srcdir = ..
+
+include ../lib/deps.Makefile
+
 FIXTURES_PATH ?= ../fixtures
 
 ifeq ($(origin CFLAGS),undefined)
@@ -12,39 +16,42 @@ endif
 CFLAGS += -pthread
 CFLAGS += -std=c11
 CFLAGS += -I. -I../kernel-module/ -I../lib/
-CFLAGS += -DPCRE2_CODE_UNIT_WIDTH=8
-CFLAGS += -DFIXTURES_PATH="\"$(FIXTURES_PATH)\""
-CFLAGS += $(shell pkg-config --cflags glib-2.0)
-CFLAGS += $(shell pkg-config --cflags json-glib-1.0)
-CFLAGS += $(shell pkg-config --cflags gthread-2.0)
 CFLAGS += -D_GNU_SOURCE
-CFLAGS += $(shell pkg-config --cflags libavcodec)
-CFLAGS += $(shell pkg-config --cflags libavformat)
-CFLAGS += $(shell pkg-config --cflags libavutil)
-CFLAGS += $(shell pkg-config --cflags libswresample)
-CFLAGS += $(shell pkg-config --cflags libavfilter)
-CFLAGS += $(shell pkg-config --cflags spandsp)
-CFLAGS += $(shell pkg-config --cflags opus)
-CFLAGS += $(shell pkg-config --cflags ncursesw)
+CFLAGS += -DFIXTURES_PATH="\"$(FIXTURES_PATH)\""
 CFLAGS += -DWITH_TRANSCODING
-CFLAGS += $(shell pkg-config --cflags openssl)
+CFLAGS += $(CFLAGS_LIBPCRE)
+CFLAGS += $(CFLAGS_GLIB)
+CFLAGS += $(CFLAGS_JSON_GLIB)
+CFLAGS += $(CFLAGS_GTHREAD)
+CFLAGS += $(CFLAGS_LIBAVCODEC)
+CFLAGS += $(CFLAGS_LIBAVFORMAT)
+CFLAGS += $(CFLAGS_LIBAVUTIL)
+CFLAGS += $(CFLAGS_LIBSWRESAMPLE)
+CFLAGS += $(CFLAGS_LIBAVFILTER)
+CFLAGS += $(CFLAGS_SPANDSP)
+CFLAGS += $(CFLAGS_OPUS)
+CFLAGS += $(CFLAGS_NCURSESW)
+CFLAGS += $(CFLAGS_OPENSSL)
 
 LDLIBS := -lm -ldl
-LDLIBS += $(shell pkg-config --libs glib-2.0)
-LDLIBS += $(shell pkg-config --libs json-glib-1.0)
-LDLIBS += $(shell pkg-config --libs gthread-2.0)
-LDLIBS += $(shell pkg-config --libs libavcodec)
-LDLIBS += $(shell pkg-config --libs libavformat)
-LDLIBS += $(shell pkg-config --libs libavutil)
-LDLIBS += $(shell pkg-config --libs libswresample)
-LDLIBS += $(shell pkg-config --libs libavfilter)
-LDLIBS += $(shell pkg-config --libs spandsp)
-LDLIBS += $(shell pkg-config --libs opus)
-LDLIBS += $(shell pkg-config --libs ncursesw)
-LDLIBS += $(shell pkg-config --libs openssl)
-
-include ../lib/g729.Makefile
-include ../lib/codec-chain.Makefile
+LDLIBS += $(LDLIBS_GLIB)
+LDLIBS += $(LDLIBS_JSON_GLIB)
+LDLIBS += $(LDLIBS_GTHREAD)
+LDLIBS += $(LDLIBS_LIBAVCODEC)
+LDLIBS += $(LDLIBS_LIBAVFORMAT)
+LDLIBS += $(LDLIBS_LIBAVUTIL)
+LDLIBS += $(LDLIBS_LIBSWRESAMPLE)
+LDLIBS += $(LDLIBS_LIBAVFILTER)
+LDLIBS += $(LDLIBS_SPANDSP)
+LDLIBS += $(LDLIBS_OPUS)
+LDLIBS += $(LDLIBS_NCURSESW)
+LDLIBS += $(LDLIBS_OPENSSL)
+
+CFLAGS += $(CFLAGS_BCG729)
+LDLIBS += $(LDLIBS_BCG729)
+
+CFLAGS += $(CFLAGS_CODEC_CHAIN)
+LDLIBS += $(LDLIBS_CODEC_CHAIN)
 
 SRCS = main.c log.c
 LIBSRCS = codeclib.strhash.c loglib.c auxlib.c resample.c str.c dtmflib.c rtplib.c poller.c ssllib.c bufferpool.c \
diff --git a/recording-daemon/Makefile b/recording-daemon/Makefile
index 8fe8f75e4..42917ea0a 100644
--- a/recording-daemon/Makefile
+++ b/recording-daemon/Makefile
@@ -1,43 +1,49 @@
 TARGET=		rtpengine-recording
 
+export top_srcdir = ..
+
+include ../lib/deps.Makefile
+
 ifeq ($(origin CFLAGS),undefined)
 CFLAGS?=	-g -Wall -Wextra -Wno-sign-compare -Wno-unused-parameter -Wstrict-prototypes -Werror=return-type \
 		-Wshadow
 else
 CFLAGS:=	$(CFLAGS)
 endif
-CFLAGS+=	-pthread -I. -I../lib/ -I../kernel-module/
+CFLAGS+=	-pthread
 CFLAGS+=	-std=c11
+CFLAGS+=	-I. -I../lib/ -I../kernel-module/
 CFLAGS+=	-D_GNU_SOURCE -D_POSIX_SOURCE -D_POSIX_C_SOURCE
-CFLAGS+=	-DPCRE2_CODE_UNIT_WIDTH=8
-CFLAGS+=	$(shell pkg-config --cflags glib-2.0)
-CFLAGS+=	$(shell pkg-config --cflags json-glib-1.0)
-CFLAGS+=	$(shell pkg-config --cflags gthread-2.0)
-CFLAGS+=	$(shell pkg-config --cflags libavcodec)
-CFLAGS+=	$(shell pkg-config --cflags libavformat)
-CFLAGS+=	$(shell pkg-config --cflags libavutil)
-CFLAGS+=	$(shell pkg-config --cflags libswresample)
-CFLAGS+=	$(shell pkg-config --cflags libavfilter)
-CFLAGS+=	$(shell pkg-config --cflags opus)
-CFLAGS+=	$(shell mysql_config --cflags)
-CFLAGS+=	$(shell pkg-config --cflags openssl)
-CFLAGS+=	$(shell pkg-config --cflags libcurl)
+CFLAGS+=	$(CFLAGS_LIBPCRE)
+CFLAGS+=	$(CFLAGS_GLIB)
+CFLAGS+=	$(CFLAGS_JSON_GLIB)
+CFLAGS+=	$(CFLAGS_GTHREAD)
+CFLAGS+=	$(CFLAGS_LIBAVCODEC)
+CFLAGS+=	$(CFLAGS_LIBAVFORMAT)
+CFLAGS+=	$(CFLAGS_LIBAVUTIL)
+CFLAGS+=	$(CFLAGS_LIBSWRESAMPLE)
+CFLAGS+=	$(CFLAGS_LIBAVFILTER)
+CFLAGS+=	$(CFLAGS_OPUS)
+CFLAGS+=	$(CFLAGS_MYSQL)
+CFLAGS+=	$(CFLAGS_OPENSSL)
+CFLAGS+=	$(CFLAGS_LIBCURL)
 
 LDLIBS:=	-lm -ldl
-LDLIBS+=	$(shell pkg-config --libs glib-2.0)
-LDLIBS+=	$(shell pkg-config --libs json-glib-1.0)
-LDLIBS+=	$(shell pkg-config --libs gthread-2.0)
-LDLIBS+=	$(shell pkg-config --libs libavcodec)
-LDLIBS+=	$(shell pkg-config --libs libavformat)
-LDLIBS+=	$(shell pkg-config --libs libavutil)
-LDLIBS+=	$(shell pkg-config --libs libswresample)
-LDLIBS+=	$(shell pkg-config --libs libavfilter)
-LDLIBS+=	$(shell pkg-config --libs opus)
-LDLIBS+=	$(shell mysql_config --libs)
-LDLIBS+=	$(shell pkg-config --libs openssl)
-LDLIBS+=	$(shell pkg-config --libs libcurl)
-
-include ../lib/g729.Makefile
+LDLIBS+=	$(LDLIBS_GLIB)
+LDLIBS+=	$(LDLIBS_JSON_GLIB)
+LDLIBS+=	$(LDLIBS_GTHREAD)
+LDLIBS+=	$(LDLIBS_LIBAVCODEC)
+LDLIBS+=	$(LDLIBS_LIBAVFORMAT)
+LDLIBS+=	$(LDLIBS_LIBAVUTIL)
+LDLIBS+=	$(LDLIBS_LIBSWRESAMPLE)
+LDLIBS+=	$(LDLIBS_LIBAVFILTER)
+LDLIBS+=	$(LDLIBS_OPUS)
+LDLIBS+=	$(LDLIBS_MYSQL)
+LDLIBS+=	$(LDLIBS_OPENSSL)
+LDLIBS+=	$(LDLIBS_LIBCURL)
+
+CFLAGS+=	$(CFLAGS_BCG729)
+LDLIBS+=	$(LDLIBS_BCG729)
 
 SRCS=		epoll.c garbage.c inotify.c main.c metafile.c stream.c recaux.c packet.c \
 		decoder.c output.c mix.c db.c log.c forward.c tag.c poller.c notify.c
diff --git a/t/Makefile b/t/Makefile
index cc0315ea0..d82c86436 100644
--- a/t/Makefile
+++ b/t/Makefile
@@ -1,5 +1,9 @@
 TARGET=		all-tests
 
+export top_srcdir = ..
+
+include ../lib/deps.Makefile
+
 with_transcoding ?= yes
 
 ifeq ($(origin CFLAGS),undefined)
@@ -11,64 +15,60 @@ endif
 PRELOAD_CFLAGS := $(CFLAGS)
 CFLAGS+=	-pthread
 CFLAGS+=	-std=c11
-CFLAGS+=	$(shell pkg-config --cflags glib-2.0)
-CFLAGS+=	$(shell pkg-config --cflags gthread-2.0)
-CFLAGS+=	$(shell pkg-config --cflags openssl)
 CFLAGS+=	-I. -I../lib/ -I../kernel-module/ -I../include/
 CFLAGS+=	-D_GNU_SOURCE
-CFLAGS+=	-DPCRE2_CODE_UNIT_WIDTH=8
-CFLAGS+=	$(shell pkg-config --cflags libpcre2-8)
-CFLAGS+=	$(shell pkg-config --cflags json-glib-1.0)
+CFLAGS+=	$(CFLAGS_GLIB)
+CFLAGS+=	$(CFLAGS_GTHREAD)
+CFLAGS+=	$(CFLAGS_OPENSSL)
+CFLAGS+=	$(CFLAGS_LIBPCRE)
+CFLAGS+=	$(CFLAGS_JSON_GLIB)
 ifeq ($(with_transcoding),yes)
-CFLAGS+=	$(shell pkg-config --cflags libavcodec)
-CFLAGS+=	$(shell pkg-config --cflags libavformat)
-CFLAGS+=	$(shell pkg-config --cflags libavutil)
-CFLAGS+=	$(shell pkg-config --cflags libswresample)
-CFLAGS+=	$(shell pkg-config --cflags libavfilter)
-CFLAGS+=	$(shell pkg-config --cflags spandsp)
-CFLAGS+=	$(shell pkg-config --cflags opus)
+CFLAGS+=	$(CFLAGS_LIBAVCODEC)
+CFLAGS+=	$(CFLAGS_LIBAVFORMAT)
+CFLAGS+=	$(CFLAGS_LIBAVUTIL)
+CFLAGS+=	$(CFLAGS_LIBSWRESAMPLE)
+CFLAGS+=	$(CFLAGS_LIBAVFILTER)
+CFLAGS+=	$(CFLAGS_SPANDSP)
+CFLAGS+=	$(CFLAGS_OPUS)
+CFLAGS+=	$(CFLAGS_LIBZ)
+CFLAGS+=	$(CFLAGS_LIBWEBSOCKETS)
+CFLAGS+=	$(CFLAGS_LIBEVENT)
+CFLAGS+=	$(CFLAGS_XMLRPC)
 CFLAGS+=	-DWITH_TRANSCODING
-CFLAGS+=	$(shell pkg-config --cflags zlib)
-CFLAGS+=	$(shell pkg-config --cflags libwebsockets)
-CFLAGS+=	$(shell pkg-config --cflags libevent_pthreads)
-CFLAGS+=	$(shell pkg-config xmlrpc_client --cflags 2> /dev/null || xmlrpc-c-config client --cflags)
-CFLAGS+=	$(shell pkg-config xmlrpc --cflags 2> /dev/null)
-CFLAGS+=	$(shell pkg-config xmlrpc_util --cflags 2> /dev/null)
 ifeq ($(RTPENGINE_EXTENDED_TESTS),1)
 CFLAGS+=	-DWITH_AMR_TESTS
 endif
-CFLAGS+=	$(shell mysql_config --cflags)
+CFLAGS+=	$(CFLAGS_MYSQL)
 else
 CFLAGS+=	-DWITHOUT_CODECLIB
 endif
 
 LDLIBS:=	-lm -ldl
-LDLIBS+=	$(shell pkg-config --libs glib-2.0)
-LDLIBS+=	$(shell pkg-config --libs gthread-2.0)
-LDLIBS+=	$(shell pkg-config --libs libcrypto)
-LDLIBS+=	$(shell pkg-config --libs openssl)
-LDLIBS+=	$(shell pkg-config --libs libpcre2-8)
-LDLIBS+=	$(shell pkg-config --libs json-glib-1.0)
+LDLIBS+=	$(LDLIBS_GLIB)
+LDLIBS+=	$(LDLIBS_GTHREAD)
+LDLIBS+=	$(LDLIBS_LIBCRYPTO)
+LDLIBS+=	$(LDLIBS_OPENSSL)
+LDLIBS+=	$(LDLIBS_LIBPCRE)
+LDLIBS+=	$(LDLIBS_JSON_GLIB)
 ifeq ($(with_transcoding),yes)
-LDLIBS+=	$(shell pkg-config --libs libavcodec)
-LDLIBS+=	$(shell pkg-config --libs libavformat)
-LDLIBS+=	$(shell pkg-config --libs libavutil)
-LDLIBS+=	$(shell pkg-config --libs libswresample)
-LDLIBS+=	$(shell pkg-config --libs libavfilter)
-LDLIBS+=	$(shell pkg-config --libs spandsp)
-LDLIBS+=	$(shell pkg-config --libs opus)
-LDLIBS+=	$(shell pkg-config --libs zlib)
-LDLIBS+=	$(shell pkg-config --libs libwebsockets)
-LDLIBS+=	-lpcap
-LDLIBS+=	$(shell pkg-config --libs libevent_pthreads)
-LDLIBS+=	$(shell pkg-config xmlrpc_client --libs 2> /dev/null || xmlrpc-c-config client --libs)
-LDLIBS+=	$(shell pkg-config xmlrpc --libs 2> /dev/null)
-LDLIBS+=	$(shell pkg-config xmlrpc_util --libs 2> /dev/null)
-LDLIBS+=	-lhiredis
-LDLIBS+=	$(shell mysql_config --libs)
+LDLIBS+=	$(LDLIBS_LIBAVCODEC)
+LDLIBS+=	$(LDLIBS_LIBAVFORMAT)
+LDLIBS+=	$(LDLIBS_LIBAVUTIL)
+LDLIBS+=	$(LDLIBS_LIBSWRESAMPLE)
+LDLIBS+=	$(LDLIBS_LIBAVFILTER)
+LDLIBS+=	$(LDLIBS_SPANDSP)
+LDLIBS+=	$(LDLIBS_OPUS)
+LDLIBS+=	$(LDLIBS_LIBZ)
+LDLIBS+=	$(LDLIBS_LIBWEBSOCKETS)
+LDLIBS+=	$(LDLIBS_LIBPCAP)
+LDLIBS+=	$(LDLIBS_LIBEVENT)
+LDLIBS+=	$(LDLIBS_XMLRPC)
+LDLIBS+=	$(LDLIBS_LIBHIREDIS)
+LDLIBS+=	$(LDLIBS_MYSQL)
 endif
 
-include ../lib/codec-chain.Makefile
+CFLAGS+=	$(CFLAGS_CODEC_CHAIN)
+LDLIBS+=	$(LDLIBS_CODEC_CHAIN)
 
 SRCS=		test-bitstr.c aes-crypt.c aead-aes-crypt.c test-const_str_hash.strhash.c aead-decrypt.c
 LIBSRCS=	loglib.c auxlib.c str.c rtplib.c ssllib.c mix_buffer.c bufferpool.c bencode.c
diff --git a/utils/gen-bcg729-flags b/utils/gen-bcg729-flags
new file mode 100755
index 000000000..dc8db3c59
--- /dev/null
+++ b/utils/gen-bcg729-flags
@@ -0,0 +1,47 @@
+#!/bin/bash
+
+have_bcg729="no"
+
+# look for bcg729
+if pkg-config --exists libbcg729; then
+  # system pkg-config
+  have_bcg729="yes"
+
+  bcg729_inc="$(pkg-config --cflags libbcg729)"
+  bcg729_lib="$(pkg-config --libs libbcg729)"
+elif [ -e /usr/include/bcg729/decoder.h ]; then
+  # system generic
+  have_bcg729="yes"
+  bcg729_lib="-lbcg729"
+elif [ -e /usr/src/bcg729/include/bcg729/decoder.h ]; then
+  # /usr/src
+  have_bcg729=yes
+  bcg729_inc="-I/usr/src/bcg729/include/"
+  bcg729_lib="-L/usr/src/bcg729/src/ -lbcg729"
+elif [ -e "${HOME}/src/bcg729/include/bcg729/decoder.h" ]; then
+  # rfuchs dev
+  have_bcg729="yes"
+  bcg729_inc="-I${HOME}/src/bcg729/include/"
+  bcg729_lib="-L${HOME}/src/bcg729/src/ -lbcg729"
+elif [ -e "${HOME}/bcg729/include/bcg729/decoder.h" ]; then
+  # home directory
+  have_bcg729="yes"
+  bcg729_inc="-I$(HOME)/bcg729/include/"
+  bcg729_lib="-L$(HOME)/bcg729/src/ -lbcg729"
+elif [ -e "../bcg729/include/bcg729/decoder.h" ]; then
+  # included toplevel
+  have_bcg729="yes"
+  bcg729_inc="-I../bcg729/include/"
+  bcg729_lib="-L../bcg729/src/ -lbcg729"
+elif [ -e /usr/local/include/bcg729/decoder.h ]; then
+  # /usr/local/include when installing from git
+  have_bcg729="yes"
+  bcg729_inc="-I/usr/local/include/"
+  bcg729_lib="-L/usr/local/lib64/ -lbcg729"
+fi
+
+if [ "${have_bcg729}" = "yes" ]; then
+  echo "CFLAGS_BCG729 := -DHAVE_BCG729"
+  echo "CFLAGS_BCG729 += ${bcg729_inc}"
+  echo "LDLIBS_BCG729 := ${bcg729_lib}"
+fi
diff --git a/utils/gen-codec-chain-flags b/utils/gen-codec-chain-flags
new file mode 100755
index 000000000..151f0aa70
--- /dev/null
+++ b/utils/gen-codec-chain-flags
@@ -0,0 +1,7 @@
+#!/bin/bash
+
+if [ -e "${CODEC_CHAIN_HOME}/usr/include/codec-chain/client.h" ]; then
+  echo "CFLAGS_CODEC_CHAIN := -DHAVE_CODEC_CHAIN -I${CODEC_CHAIN_HOME}/usr/include"
+elif [ -e /usr/include/codec-chain/client.h ]; then
+  echo "CFLAGS_CODEC_CHAIN := -DHAVE_CODEC_CHAIN"
+fi
diff --git a/utils/gen-common-flags b/utils/gen-common-flags
new file mode 100755
index 000000000..63c447486
--- /dev/null
+++ b/utils/gen-common-flags
@@ -0,0 +1,119 @@
+#!/bin/bash
+
+gen-pkgconf-flags()
+{
+  local var="$1"
+  local pc="$2"
+
+  echo "export CFLAGS_${var} LDLIBS_${var}"
+  echo "CFLAGS_${var} := $(pkg-config --cflags "${pc}")"
+  echo "LDLIBS_${var} := $(pkg-config --libs "${pc}")"
+}
+
+if [ -z "${top_srcdir}" ]; then
+  top_srcdir=.
+fi
+
+have_dpkg_parsechangelog=no
+if command -v dpkg-parsechangelog >/dev/null; then
+  have_dpkg_parsechangelog=yes
+fi
+
+if [ -z "${RELEASE_DATE}" ]; then
+  if [ "${have_dpkg_parsechangelog}" = yes ]; then
+    RELEASE_DATE="$(date -u -d "@$(dpkg-parsechangelog -l${top_srcdir}/debian/changelog -STimestamp)" '+%F')"
+  fi
+  if [ -z "${RELEASE_DATE}" ]; then
+    RELEASE_DATE="undefined"
+  fi
+fi
+echo "RELEASE_DATE = ${RELEASE_DATE}"
+
+if [ -z "${RTPENGINE_VERSION}" ]; then
+  if [ "${have_dpkg_parsechangelog}" = yes ]; then
+    deb_version="$(dpkg-parsechangelog -l${top_srcdir}/debian/changelog | awk '/^Version: / { print $2 }')"
+  fi
+  git_br_commit="git-$(git rev-parse --abbrev-ref --symbolic-full-name HEAD 2> /dev/null)-$(git rev-parse --short HEAD 2> /dev/null)"
+
+  if [ "${have_dpkg_parsechangelog}" = yes ]; then
+    RTPENGINE_VERSION+=" ${deb_version}"
+  fi
+  if [ "${git_br_commit}" != "git--" ]; then
+    RTPENGINE_VERSION+=" ${git_br_commit}"
+  fi
+
+  if [ -z "${RTPENGINE_VERSION}" ]; then
+    RTPENGINE_VERSION=" undefined"
+  fi
+fi
+echo "RTPENGINE_VERSION := ${RTPENGINE_VERSION}"
+
+CFLAGS_DEFAULT=
+CPPFLAGS_DEFAULT=
+LDFLAGS_DEFAULT=
+LDLIBS_DEFAULT=
+if command -v dpkg-buildflags >/dev/null; then
+  # support http://wiki.debian.org/Hardening for >=wheezy
+  CFLAGS_DEFAULT=$(dpkg-buildflags --get CFLAGS)
+  CPPFLAGS_DEFAULT=$(dpkg-buildflags --get CPPFLAGS)
+  LDFLAGS=$(dpkg-buildflags --get LDFLAGS)
+fi
+CFLAGS_DEFAULT+=" -O3 -flto=auto -ffat-lto-objects"
+LDFLAGS_DEFAULT+=" -flto=auto"
+
+echo "export CFLAGS_DEFAULT := ${CFLAGS_DEFAULT}"
+echo "export CPPFLAGS_DEFAULT := ${CPPFLAGS_DEFAULT}"
+echo "export LDFLAGS_DEFAULT := ${LDFLAGS_DEFAULT}"
+
+gen-pkgconf-flags GLIB                glib-2.0
+gen-pkgconf-flags GTHREAD             gthread-2.0
+gen-pkgconf-flags JSON_GLIB           json-glib-1.0
+gen-pkgconf-flags LIBAVCODEC          libavcodec
+gen-pkgconf-flags LIBAVFILTER         libavfilter
+gen-pkgconf-flags LIBAVFORMAT         libavformat
+gen-pkgconf-flags LIBAVUTIL           libavutil
+gen-pkgconf-flags LIBCURL             libcurl
+gen-pkgconf-flags LIBCRYPTO           libcrypto
+gen-pkgconf-flags LIBEVENT            libevent_pthreads
+gen-pkgconf-flags LIBIPTC             libiptc
+gen-pkgconf-flags LIBMNL              libmnl
+gen-pkgconf-flags LIBNFTNL            libnftnl
+gen-pkgconf-flags LIBPCRE             libpcre2-8
+echo "CFLAGS_LIBPCRE += -DPCRE2_CODE_UNIT_WIDTH=8"
+gen-pkgconf-flags LIBSWRESAMPLE       libswresample
+gen-pkgconf-flags LIBWEBSOCKETS       libwebsockets
+gen-pkgconf-flags LIBZ                zlib
+gen-pkgconf-flags NCURSESW            ncursesw
+gen-pkgconf-flags OPENSSL             openssl
+gen-pkgconf-flags OPUS                opus
+gen-pkgconf-flags SPANDSP             spandsp
+
+echo "export CFLAGS_XMLRPC := $(pkg-config xmlrpc_client --cflags 2> /dev/null || xmlrpc-c-config client --cflags)"
+echo "CFLAGS_XMLRPC += $(pkg-config xmlrpc --cflags 2> /dev/null)"
+echo "CFLAGS_XMLRPC += $(pkg-config xmlrpc_util --cflags 2> /dev/null)"
+echo "export LDLIBS_XMLRPC := $(pkg-config xmlrpc_client --libs 2> /dev/null || xmlrpc-c-config client --libs)"
+echo "LDLIBS_XMLRPC += $(pkg-config xmlrpc --libs 2> /dev/null)"
+echo "LDLIBS_XMLRPC += $(pkg-config xmlrpc_util --libs 2> /dev/null)"
+
+echo "export CFLAGS_MYSQL := $(mysql_config --cflags)"
+echo "export LDLIBS_MYSQL := $(mysql_config --libs)"
+
+echo "export LDLIBS_LIBHIREDIS := -lhiredis"
+echo "export LDLIBS_LIBPCAP := -lpcap"
+
+if pkg-config --exists libmosquitto; then
+  gen-pkgconf-flags MQTT              libmosquitto
+  echo "CFLAGS_MQTT += -DHAVE_MQTT"
+fi
+
+# look for libsystemd
+if pkg-config --exists libsystemd; then
+  gen-pkgconf-flags LIBSYSTEMD        libsystemd
+  echo "CFLAGS_LIBSYSTEMD += -DHAVE_LIBSYSTEMD"
+fi
+
+# look for liburing
+if pkg-config --atleast-version=2.3 liburing; then
+  gen-pkgconf-flags LIBURING liburing
+  echo "CFLAGS_LIBURING += -DHAVE_LIBURING"
+fi