1

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 ) 配置了一个单视图应用程序，并在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)

链接时似乎有问题，没有When.o在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];

还检查了SAXParser.i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):

但是在尝试的情况下When

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

我遇到了一个与番石榴类似的错误

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)

检查后libjre_emul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;

我尝试了不同的版本（0.9.5、0.9.4、0.9.3、0.9），但错误仍然存​​在。

总之，据我所知，没有办法将番石榴与 j2objc 一起使用，因为它取决于缺少的符号。

希望有人能证明我错了吗？我真的很想在实际项目中开始使用 j2objc！

提前致谢！圣诞节快乐！

4

1 回答 1

4

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。

于 2014-12-25T05:37:22.410 回答