[SOLVED] Unable to link against juce as XrmUniqueQuark symbol is not found

Linux
1

Hi !

I’m trying to build an old project made with juce 4.1 using cmake 3.0 and gcc 4.8.

I successfully compile Juce as a static library.

The building of my project works well except the linking process, I got libjuce.a(juce_events_79b2840.o): undefined reference to symbol «XrmUniqueQuark» /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../x86_64-linux-gnu/libX11.so: error adding symbols: DSO missing from command line.

Which library am I missing to include in my linking command line ?
I’ve tried adding -lX11 but it didn’t work.

Thanks.

ANSWER -> post 7 : Unable to link against juce as XrmUniqueQuark symbol is not found

2

No idea… We don’t use that symbol anywhere in JUCE. Even searching the whole of juce for “xrm” gives no results, so you’d have to figure out yourself where it comes from, I’m afraid!

3

Ooh ooh :slight_smile:
My project uses QT.
It’s weird because the error points to the libjuce.a which is just static compiled Juce’s source code.

4 
grep -rnw -e 'XrmUniqueQuark'
binary file juce_events_79b2840.o matching 
binary file libjuce.a matching

readelf -Ws libjuce.a | grep Xrm
2455: 0000000000000000     0 NOTYPE  GLOBAL DEFAULT  UND XrmUniqueQuark

The XrmUniqueQuark is a function declared in <X11/Xresource.h> which is used in juce_events.cpp :

#elif JUCE_LINUX
 #include <X11/Xlib.h>
 #include <X11/Xresource.h>
 #include <X11/Xutil.h>
 #undef KeyPress
 #include <unistd.h>
#endif

The man entry fro XrmUniqueQuark says :
The XrmUniqueQuark function allocates a quark that is guaranteed not to represent any string that is known to the resource manager.

5

The juce Makefile I’m using which compiles fine:

# (this disables dependency generation if multiple architectures are set)
DEPFLAGS := $(if $(word 2, $(TARGET_ARCH)), , -MMD)

ifndef CONFIG
  CONFIG=Debug
endif

ifeq ($(CONFIG),Debug)
  BINDIR := build
  LIBDIR := build
  OBJDIR := build/intermediate/Debug
  OUTDIR := build

  ifeq ($(TARGET_ARCH),)
    TARGET_ARCH := -march=native
  endif

  CPPFLAGS := $(DEPFLAGS) -D "LINUX=1" -D "DEBUG=1" -D "_DEBUG=1" -D "JUCER_LINUX_MAKE_6D53C8B4=1" -D "JUCE_APP_VERSION=1.0.0" -D "JUCE_APP_VERSION_HEX=0x10000" -I /usr/include -I /usr/include/freetype2 -I ../../JuceLibraryCode -I ../../JuceLibraryCode/modules
  CFLAGS += $(CPPFLAGS) $(TARGET_ARCH) -g -ggdb -O0
  CXXFLAGS += $(CFLAGS) -std=c++11
  LDFLAGS += $(TARGET_ARCH) -L$(BINDIR) -L$(LIBDIR) -L/usr/lib/x86_64-linux-gnu/ -lX11 -lXext -lXinerama -lasound -ldl -lfreetype -lpthread -lrt 

  TARGET := libjuce.a
  BLDCMD = ar -rcs $(OUTDIR)/$(TARGET) $(OBJECTS)
  CLEANCMD = rm -rf $(OUTDIR)/$(TARGET) $(OBJDIR)
endif

ifeq ($(CONFIG),Release)
  BINDIR := build
  LIBDIR := build
  OBJDIR := build/intermediate/Release
  OUTDIR := build

  ifeq ($(TARGET_ARCH),)
    TARGET_ARCH := -march=native
  endif

  CPPFLAGS := $(DEPFLAGS) -D "LINUX=1" -D "NDEBUG=1" -D "JUCER_LINUX_MAKE_6D53C8B4=1" -D "JUCE_APP_VERSION=1.0.0" -D "JUCE_APP_VERSION_HEX=0x10000" -I /usr/include -I /usr/include/freetype2 -I ../../JuceLibraryCode -I ../../JuceLibraryCode/modules
  CFLAGS += $(CPPFLAGS) $(TARGET_ARCH) -O3
  CXXFLAGS += $(CFLAGS) -std=c++11
  LDFLAGS += $(TARGET_ARCH) -L$(BINDIR) -L$(LIBDIR) -fvisibility=hidden -L/usr/lib/x86_64-linux-gnu/ -lX11 -lXext -lXinerama -lasound -ldl -lfreetype -lpthread -lrt 

  TARGET := libjuce.a
  BLDCMD = ar -rcs $(OUTDIR)/$(TARGET) $(OBJECTS)
  CLEANCMD = rm -rf $(OUTDIR)/$(TARGET) $(OBJDIR)
endif

OBJECTS := \
  $(OBJDIR)/juce_audio_basics_2442e4ea.o \
  $(OBJDIR)/juce_audio_devices_a4c8a728.o \
  $(OBJDIR)/juce_audio_formats_d349f0c8.o \
  $(OBJDIR)/juce_audio_processors_44a134a2.o \
  $(OBJDIR)/juce_audio_utils_f63b12e8.o \
  $(OBJDIR)/juce_core_aff681cc.o \
  $(OBJDIR)/juce_data_structures_bdd6d488.o \
  $(OBJDIR)/juce_events_79b2840.o \
  $(OBJDIR)/juce_graphics_c8f1e7a4.o \
  $(OBJDIR)/juce_gui_basics_a630dd20.o \
  $(OBJDIR)/juce_gui_extra_7767d6a8.o \

.PHONY: clean

$(OUTDIR)/$(TARGET): $(OBJECTS) $(RESOURCES)
	@echo Linking juce
	-@mkdir -p $(BINDIR)
	-@mkdir -p $(LIBDIR)
	-@mkdir -p $(OUTDIR)
	@$(BLDCMD)

clean:
	@echo Cleaning juce
	@$(CLEANCMD)

strip:
	@echo Stripping juce
	-@strip --strip-unneeded $(OUTDIR)/$(TARGET)

$(OBJDIR)/juce_audio_basics_2442e4ea.o: ../../JuceLibraryCode/modules/juce_audio_basics/juce_audio_basics.cpp
	-@mkdir -p $(OBJDIR)
	@echo "Compiling juce_audio_basics.cpp"
	@$(CXX) $(CXXFLAGS) -o "$@" -c "$<"

$(OBJDIR)/juce_audio_devices_a4c8a728.o: ../../JuceLibraryCode/modules/juce_audio_devices/juce_audio_devices.cpp
	-@mkdir -p $(OBJDIR)
	@echo "Compiling juce_audio_devices.cpp"
	@$(CXX) $(CXXFLAGS) -o "$@" -c "$<"

$(OBJDIR)/juce_audio_formats_d349f0c8.o: ../../JuceLibraryCode/modules/juce_audio_formats/juce_audio_formats.cpp
	-@mkdir -p $(OBJDIR)
	@echo "Compiling juce_audio_formats.cpp"
	@$(CXX) $(CXXFLAGS) -o "$@" -c "$<"

$(OBJDIR)/juce_audio_processors_44a134a2.o: ../../JuceLibraryCode/modules/juce_audio_processors/juce_audio_processors.cpp
	-@mkdir -p $(OBJDIR)
	@echo "Compiling juce_audio_processors.cpp"
	@$(CXX) $(CXXFLAGS) -o "$@" -c "$<"

$(OBJDIR)/juce_audio_utils_f63b12e8.o: ../../JuceLibraryCode/modules/juce_audio_utils/juce_audio_utils.cpp
	-@mkdir -p $(OBJDIR)
	@echo "Compiling juce_audio_utils.cpp"
	@$(CXX) $(CXXFLAGS) -o "$@" -c "$<"

$(OBJDIR)/juce_core_aff681cc.o: ../../JuceLibraryCode/modules/juce_core/juce_core.cpp
	-@mkdir -p $(OBJDIR)
	@echo "Compiling juce_core.cpp"
	@$(CXX) $(CXXFLAGS) -o "$@" -c "$<"

$(OBJDIR)/juce_data_structures_bdd6d488.o: ../../JuceLibraryCode/modules/juce_data_structures/juce_data_structures.cpp
	-@mkdir -p $(OBJDIR)
	@echo "Compiling juce_data_structures.cpp"
	@$(CXX) $(CXXFLAGS) -o "$@" -c "$<"

$(OBJDIR)/juce_events_79b2840.o: ../../JuceLibraryCode/modules/juce_events/juce_events.cpp
	-@mkdir -p $(OBJDIR)
	@echo "Compiling juce_events.cpp"
	@$(CXX) $(CXXFLAGS) -o "$@" -c "$<"

$(OBJDIR)/juce_graphics_c8f1e7a4.o: ../../JuceLibraryCode/modules/juce_graphics/juce_graphics.cpp
	-@mkdir -p $(OBJDIR)
	@echo "Compiling juce_graphics.cpp"
	@$(CXX) $(CXXFLAGS) -o "$@" -c "$<"

$(OBJDIR)/juce_gui_basics_a630dd20.o: ../../JuceLibraryCode/modules/juce_gui_basics/juce_gui_basics.cpp
	-@mkdir -p $(OBJDIR)
	@echo "Compiling juce_gui_basics.cpp"
	@$(CXX) $(CXXFLAGS) -o "$@" -c "$<"

$(OBJDIR)/juce_gui_extra_7767d6a8.o: ../../JuceLibraryCode/modules/juce_gui_extra/juce_gui_extra.cpp
	-@mkdir -p $(OBJDIR)
	@echo "Compiling juce_gui_extra.cpp"
	@$(CXX) $(CXXFLAGS) -o "$@" -c "$<"

-include $(OBJECTS:%.o=%.d)

The /usr/lib/x86_64-linux-gnu/ folder contains libX11.so.

6

If you just do a standard juce build of e.g. the juce demos or other example code, then I’m assuming that works OK?

7

-lX11 was effectively needed for linking.

Prefer the CMAKE way of doing it:

FIND_PACKAGE(X11 REQUIRED)
TARGET_LINK_LIBRARIES(${PROJECT_NAME} juce ${X11_LIBRARIES})

As it’s not the first time I encounter such embarrassment I should probably make a tuto about how to compile and link juce with an user’s project.