Make .mk files more portable

Replace some -ldl by $(DLOPEN_LIBS)
Add some FREEBSD tests

Change-Id: Ic30fe29b938d877694db2927775f89de15c02d87
Reviewed-on: https://gerrit.libreoffice.org/20652Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Matúš Kukan <matus@libreoffice.org>

avmedia/Library_avmediaogl.mk

@@ -51,7 +51,7 @@ else ifeq ($(OS),MACOSX)
 $(eval $(call gb_Library_use_system_darwin_frameworks,avmediaogl,\
 	OpenGL \
 ))
-else ifeq ($(OS),LINUX)
+else ifeq ($(OS), $(filter LINUX %BSD SOLARIS, $(OS)))
 $(eval $(call gb_Library_add_libs,avmediaogl,\
     -lGL \
 ))

chart2/Library_chartcore.mk

@@ -253,9 +253,9 @@ else ifeq ($(OS),MACOSX)
 $(eval $(call gb_Library_use_system_darwin_frameworks,chartcore,\
 	OpenGL \
 ))
-else ifeq ($(OS),LINUX)
+else ifeq ($(OS), $(filter LINUX %BSD SOLARIS, $(OS)))
 $(eval $(call gb_Library_add_libs,chartcore,\
-	-ldl \
+	$(DLOPEN_LIBS) \
 	-lGL \
 	-lX11 \
 ))

chart2/Library_chartopengl.mk

@@ -65,9 +65,9 @@ else ifeq ($(OS),MACOSX)
 $(eval $(call gb_Library_use_system_darwin_frameworks,chartopengl,\
 	OpenGL \
 ))
-else ifeq ($(OS),LINUX)
+else ifeq ($(OS), $(filter LINUX %BSD SOLARIS, $(OS)))
 $(eval $(call gb_Library_add_libs,chartopengl,\
-	-ldl \
+	$(DLOPEN_LIBS) \
 	-lGL \
 	-lX11 \
 ))

sd/Module_sd.mk

@@ -25,7 +25,7 @@ $(eval $(call gb_Module_add_l10n_targets,sd,\
     UIConfig_simpress \
 ))
 
-ifneq ($(OS),DRAGONFLY)
+ifeq ($(filter DRAGONFLY FREEBSD,$(OS)),)
 $(eval $(call gb_Module_add_check_targets,sd,\
 	$(if $(and $(filter $(COM),MSC),$(MERGELIBS)),, \
 		CppunitTest_sd_uimpress) \

vcl/StaticLibrary_glxtest.mk

@@ -30,8 +30,7 @@ $(eval $(call gb_StaticLibrary_use_api,glxtest,\
 ))
 
 $(eval $(call gb_StaticLibrary_add_libs,glxtest,\
-	-lm \
-	-ldl \
+	-lm $(DLOPEN_LIBS) \
 	-lpthread \
     -lX11 \
 ))