Fix compilation of zmq on OSX

libzmq uses the LDFLAGS to find libraries, so do not send cmake LDFLAGS
that ignore linker errors since that will give compiler errors on OSX
(the makefile does not check if the symbol exists in a header; it just
compiles a program and checks linking).

Makefile.common

@@ -256,7 +256,7 @@ CMinpack-clean:
 libzmq:
 	test -d 3rdParty/libzmq
 	mkdir -p 3rdParty/libzmq/build
-	(cd 3rdParty/libzmq/build && test -f Makefile || CC="$(CC)" CXX="$(CXX)" CFLAGS="$(CFLAGS)" CPPFLAGS="$(CPPFLAGS)" $(CMAKE) -DCMAKE_VERBOSE_MAKEFILE:Bool=ON -DCMAKE_AR:String="$(AR)" -DCMAKE_COLOR_MAKEFILE:Bool=OFF -DWITH_PERF_TOOL:Bool=OFF -DZMQ_BUILD_TESTS:Bool=OFF -DENABLE_CPACK:Bool=OFF -DCMAKE_BUILD_TYPE=Release .. -G $(CMAKE_TARGET))
+	(cd 3rdParty/libzmq/build && test -f Makefile || CC="$(CC)" CXX="$(CXX)" CFLAGS="$(CFLAGS)" CPPFLAGS="$(CPPFLAGS)" $(CMAKE_CHECK_UNDEFINED_LOOKUP) -DCMAKE_VERBOSE_MAKEFILE:Bool=ON -DCMAKE_AR:String="$(AR)" -DCMAKE_COLOR_MAKEFILE:Bool=OFF -DWITH_PERF_TOOL:Bool=OFF -DZMQ_BUILD_TESTS:Bool=OFF -DENABLE_CPACK:Bool=OFF -DCMAKE_BUILD_TYPE=Release .. -G $(CMAKE_TARGET))
 	test -f 3rdParty/libzmq/build/lib/$(LIBZMQLIB) || $(MAKE) -C 3rdParty/libzmq/build
 	test ! `uname` = Darwin || install_name_tool -id @rpath/$(LIBZMQLIB) 3rdParty/libzmq/build/lib/$(LIBZMQLIB)
 	# copy dll/so to $(LIB_OMC) and $(builddir_bin) folders

Makefile.in

@@ -11,8 +11,9 @@ includedir = @includedir@
 datadir = @datadir@
 datarootdir = @datarootdir@
 docdir = @docdir@
-CMAKE = CC="$(CC)" CXX="$(CXX)" CFLAGS="$(CFLAGS)" CPPFLAGS="$(CPPFLAGS)" LDFLAGS="@CMAKE_LDFLAGS@" cmake @CMAKE_EXTRA_DEFINES@
-CMAKE_RPATH = CC="$(CC)" CXX="$(CXX)" CFLAGS="$(CFLAGS)" CXXFLAGS="$(CXXFLAGS)" CPPFLAGS="$(CPPFLAGS)" LDFLAGS="@RPATH_QMAKE@ @CMAKE_LDFLAGS@" cmake @CMAKE_EXTRA_DEFINES@
+CMAKE = CC="$(CC)" CXX="$(CXX)" CFLAGS="$(CFLAGS)" CPPFLAGS="$(CPPFLAGS)" LDFLAGS="@CMAKE_LDFLAGS_UNDEFINED_LOOKUP@" cmake @CMAKE_EXTRA_DEFINES@
+CMAKE_CHECK_UNDEFINED_LOOKUP = CC="$(CC)" CXX="$(CXX)" CFLAGS="$(CFLAGS)" CPPFLAGS="$(CPPFLAGS)" cmake @CMAKE_EXTRA_DEFINES@
+CMAKE_RPATH = CC="$(CC)" CXX="$(CXX)" CFLAGS="$(CFLAGS)" CXXFLAGS="$(CXXFLAGS)" CPPFLAGS="$(CPPFLAGS)" LDFLAGS="@RPATH_QMAKE@ @CMAKE_LDFLAGS_UNDEFINED_LOOKUP@" cmake @CMAKE_EXTRA_DEFINES@
 CMAKE_TARGET = "Unix Makefiles"
 OPENCL = @OPENCL@
 AR = @AR@

Makefile.omdev.mingw

@@ -27,6 +27,7 @@ CFLAGS =-g -O2 -falign-functions
 MSGPACK_CFLAGS = -march=i686
 
 CMAKE = $(OMDEVMSYS)/bin/cmake/bin/cmake
+CMAKE_CHECK_UNDEFINED_LOOKUP = $(CMAKE)
 CMAKE_TARGET = "MSYS Makefiles"
 
 ifeq (MINGW32,$(findstring MINGW32,$(shell uname)))

configure.ac

@@ -605,7 +605,7 @@ AC_CHECK_HEADER([CL/cl.h],[OPENCL="Yes"],[
 ])
 FINAL_MESSAGES="$FINAL_MESSAGES\nParModelica: $OPENCL"
 
-AC_SUBST(CMAKE_LDFLAGS)
+AC_SUBST(CMAKE_LDFLAGS_UNDEFINED_LOOKUP)
 AC_SUBST(CMAKE_EXTRA_DEFINES)
 AC_SUBST(DLLEXT)
 AC_SUBST(UMFPACK_SHARED)
@@ -642,7 +642,7 @@ if test "$DARWIN" = "1"; then
   AR_SH="sh -x ar.sh"
   OMC_LIBS="$OMC_LIBS -Wl,-undefined -Wl,dynamic_lookup"
   BOOTSTRAP_STATIC=""
-  CMAKE_LDFLAGS="-Wl,-undefined -Wl,dynamic_lookup"
+  CMAKE_LDFLAGS_UNDEFINED_LOOKUP="-Wl,-undefined -Wl,dynamic_lookup"
   UMFPACK_SHARED=ON
   CONFIG_OS=OSX
 elif echo "$host" | grep -iq "mingw"; then