Question

我正在玩j2objc，看看我是否可以在我的项目中使用番石榴。

我的项目非常简单：为j2obcj（https://github.com/google/j2objc/wiki/Xcode-Build-Rules）配置的单个视图应用程序，其中自定义行已添加到appDelegete.m

#include "java/util/ArrayList.h"
#include "com/google/common/collect/Lists.h"
[...]
[ComGoogleCommonCollectLists newArrayList];

尝试编译它会产生错误：

Undefined symbols for architecture x86_64:
  "_JavaxAnnotationMetaWhenEnum_initialized", referenced from:
      +[ComGoogleCommonBaseCharMatcher __annotations_removeFromWithJavaLangCharSequence_] in libguava.a(CharMatcher.o)
      +[ComGoogleCommonBaseCharMatcher __annotations_retainFromWithJavaLangCharSequence_] in libguava.a(CharMatcher.o)
      +[ComGoogleCommonBaseCharMatcher __annotations_replaceFromWithJavaLangCharSequence_withChar_] in libguava.a(CharMatcher.o)
      +[ComGoogleCommonBaseCharMatcher __annotations_replaceFromWithJavaLangCharSequence_withJavaLangCharSequence_] in libguava.a(CharMatcher.o)
      +[ComGoogleCommonBaseCharMatcher __annotations_trimFromWithJavaLangCharSequence_] in libguava.a(CharMatcher.o)
      +[ComGoogleCommonBaseCharMatcher __annotations_trimLeadingFromWithJavaLangCharSequence_] in libguava.a(CharMatcher.o)
      +[ComGoogleCommonBaseCharMatcher __annotations_trimTrailingFromWithJavaLangCharSequence_] in libguava.a(CharMatcher.o)
      ...
  "_JavaxAnnotationMetaWhenEnum_values_", referenced from:
      +[ComGoogleCommonBaseCharMatcher __annotations_removeFromWithJavaLangCharSequence_] in libguava.a(CharMatcher.o)
      +[ComGoogleCommonBaseCharMatcher __annotations_retainFromWithJavaLangCharSequence_] in libguava.a(CharMatcher.o)
      +[ComGoogleCommonBaseCharMatcher __annotations_replaceFromWithJavaLangCharSequence_withChar_] in libguava.a(CharMatcher.o)
      +[ComGoogleCommonBaseCharMatcher __annotations_replaceFromWithJavaLangCharSequence_withJavaLangCharSequence_] in libguava.a(CharMatcher.o)
      +[ComGoogleCommonBaseCharMatcher __annotations_trimFromWithJavaLangCharSequence_] in libguava.a(CharMatcher.o)
      +[ComGoogleCommonBaseCharMatcher __annotations_trimLeadingFromWithJavaLangCharSequence_] in libguava.a(CharMatcher.o)
      +[ComGoogleCommonBaseCharMatcher __annotations_trimTrailingFromWithJavaLangCharSequence_] in libguava.a(CharMatcher.o)
      ...
  "_OBJC_CLASS_$_JavaxAnnotationCheckForNull", referenced from:
      objc-class-ref in libguava.a(Ints.o)
      objc-class-ref in libguava.a(AndroidInteger.o)
  "_OBJC_CLASS_$_JavaxAnnotationCheckReturnValue", referenced from:
      objc-class-ref in libguava.a(CharMatcher.o)
      objc-class-ref in libguava.a(Joiner.o)
      objc-class-ref in libguava.a(Splitter.o)
      objc-class-ref in libguava.a(CacheBuilder.o)
      objc-class-ref in libguava.a(BaseEncoding.o)
      objc-class-ref in libguava.a(UnsignedLong.o)
      objc-class-ref in libguava.a(UnsignedInteger.o)
      ...
  "_OBJC_CLASS_$_JavaxAnnotationMetaWhenEnum", referenced from:
      objc-class-ref in libguava.a(CharMatcher.o)
      objc-class-ref in libguava.a(Joiner.o)
      objc-class-ref in libguava.a(Splitter.o)
      objc-class-ref in libguava.a(CacheBuilder.o)
      objc-class-ref in libguava.a(BaseEncoding.o)
      objc-class-ref in libguava.a(UnsignedLong.o)
      objc-class-ref in libguava.a(UnsignedInteger.o)
      ...
  "_OBJC_CLASS_$_JavaxAnnotationNullable", referenced from:
      objc-class-ref in libguava.a(Equivalence.o)
      objc-class-ref in libguava.a(FunctionalEquivalence.o)
      objc-class-ref in libguava.a(Functions.o)
      objc-class-ref in libguava.a(Joiner.o)
      objc-class-ref in libguava.a(Objects.o)
      objc-class-ref in libguava.a(Optional.o)
      objc-class-ref in libguava.a(PairwiseEquivalence.o)
      ...
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

链接时似乎存在问题，When.o中没有libjre_emul.a。

我尝试运行以下行没有任何问题，只是为了检查javax包是否在那里

#include "javax/xml/parsers/SAXParser.h"
[...]
[[JavaxXmlParsersSAXParser alloc] init];

同时检查SAXParser.i是否在libjre_emul

$ otool -o lib/libjre_emul.a  | grep .o\): | grep SAXParser
lib/libjre_emul.a(SAXParser.o):
lib/libjre_emul.a(SAXParserFactory.o):
lib/libjre_emul.a(SAXParserFactoryImpl.o):
lib/libjre_emul.a(SAXParserImpl.o):

但是在尝试When

的情况下

#include "javax/annotation/meta/When.h"
[...]
[JavaxAnnotationMetaWhenEnum values];

我收到类似于番石榴

的错误

Undefined symbols for architecture x86_64:
  "_OBJC_CLASS_$_JavaxAnnotationMetaWhenEnum", referenced from:
      objc-class-ref in AppDelegate.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

检查libjre_emul后，没有When.o

otool -o lib/libjre_emul.a  | grep .o\): | grep When

我的设置是：

J2OBJC_HOME = ./bin/j2objc-0.9.5;
HEADER_SEARCH_PATHS = $(inherited) "${J2OBJC_HOME}/include";
LIBRARY_SEARCH_PATHS = $(inherited) "${J2OBJC_HOME}/lib";
OTHER_LDFLAGS = $(inherited) -l"z" -l"jre_emul" -l"guava" -l"icucore" -framework "Security" -ObjC;

我尝试过不同的版本（0.9.5,0.9.4,0.9.3,0.9），但错误仍然存在。

总之，据我所知，没有办法使用guava和j2objc，因为它取决于缺少的符号。

有希望有人证明我错了吗？我真的想在真正的项目中开始使用j2objc！

提前致谢！圣诞快乐！

Answer 1

尝试在jsr305库（-ljsr305）中进行链接，因为它定义了上面引用的javax.annotation注释。

j2objc错误添加番石榴（When.o缺失）

1 个答案: