Fix use of sed on BSD.

Closes #1614. Thanks to Christoph Krey.

ChangeLog.txt

@@ -1,5 +1,6 @@
 Build:
 - Various fixes for building with <C99 support. Closes #1622.
+- Fix use of sed on BSD. Closes #1614.
 
 
 1.6.9 - 20200227

config.mk

@@ -158,8 +158,10 @@ PASSWD_LDADD:=
 
 ifneq ($(or $(findstring $(UNAME),FreeBSD), $(findstring $(UNAME),OpenBSD), $(findstring $(UNAME),NetBSD)),)
 	BROKER_LDADD:=$(BROKER_LDADD) -lm
+	SEDINPLACE:=-i ""
 else
 	BROKER_LDADD:=$(BROKER_LDADD) -ldl -lm
+	SEDINPLACE:=-i
 endif
 
 ifeq ($(UNAME),Linux)

lib/Makefile

@@ -74,7 +74,7 @@ endif
 	$(INSTALL) mqtt_protocol.h "${DESTDIR}${incdir}/mqtt_protocol.h"
 	$(INSTALL) -d "${DESTDIR}${libdir}/pkgconfig"
 	$(INSTALL) -m644 ../libmosquitto.pc.in "${DESTDIR}${libdir}/pkgconfig/libmosquitto.pc"
-	sed -i -e "s#@CMAKE_INSTALL_PREFIX@#${prefix}#" -e "s#@VERSION@#${VERSION}#" "${DESTDIR}${libdir}/pkgconfig/libmosquitto.pc"
+	sed ${SEDINPLACE} -e "s#@CMAKE_INSTALL_PREFIX@#${prefix}#" -e "s#@VERSION@#${VERSION}#" "${DESTDIR}${libdir}/pkgconfig/libmosquitto.pc"
 ifeq ($(WITH_SHARED_LIBRARIES),yes)
 	$(MAKE) -C cpp install
 endif

lib/cpp/Makefile

@@ -26,7 +26,7 @@ endif
 	$(INSTALL) mosquittopp.h "${DESTDIR}${incdir}/mosquittopp.h"
 	$(INSTALL) -d "${DESTDIR}${libdir}/pkgconfig/"
 	$(INSTALL) -m644 ../../libmosquittopp.pc.in "${DESTDIR}${libdir}/pkgconfig/libmosquittopp.pc"
-	sed -i -e "s#@CMAKE_INSTALL_PREFIX@#${prefix}#" -e "s#@VERSION@#${VERSION}#" "${DESTDIR}${libdir}/pkgconfig/libmosquittopp.pc"
+	sed ${SEDINPLACE} -e "s#@CMAKE_INSTALL_PREFIX@#${prefix}#" -e "s#@VERSION@#${VERSION}#" "${DESTDIR}${libdir}/pkgconfig/libmosquittopp.pc"
 
 uninstall :
 	-rm -f "${DESTDIR}${libdir}/libmosquittopp.so.${SOVERSION}"