Linux环境下libiconv库基于Android NDK的编译方法
首先,到官网下载最新版的libiconv库:http://ftp.gnu.org/pub/gnu/libiconv/,我编译时为1.14版,libiconv-1.14.tar.gz,解压该文件到linux系统中指定目录,然后把其中的源文件全部放到jni文件中。首先在linux环境中进行配置,即首先对libiconv库执行configure,生产linux环境下的config.h文件,因为这样生产的config.h里面定义了很多linux平台下的宏,安装方法:首先,$./configure,然后$make,然后构建Android.mk文件放到jni目录中。
Android.mk文件内容:
LOCAL_PATH:= $(call my-dir)
#libiconv.so
include $(CLEAR_VARS)
LOCAL_MODULE := libiconv
LOCAL_CFLAGS := \
-Wno-multichar \
-DANDROID \
-DLIBDIR="c" \
-DBUILDING_LIBICONV \
-DIN_LIBRARY
LOCAL_SRC_FILES := \
libcharset/lib/localcharset.c \
lib/iconv.c \
lib/relocatable.c
LOCAL_C_INCLUDES += \
$(LOCAL_PATH)/include \
$(LOCAL_PATH)/libcharset \
$(LOCAL_PATH)/lib \
$(LOCAL_PATH)/libcharset/include \
$(LOCAL_PATH)/srclib
include $(BUILD_SHARED_LIBRARY)
#test
include $(CLEAR_VARS)
LOCAL_MODULE :=genutf8
LOCAL_SRC_FILES := tests/genutf8.c
LOCAL_C_INCLUDES += \
$(LOCAL_PATH)/include \
$(LOCAL_PATH)/libcharset \
$(LOCAL_PATH)/lib \
$(LOCAL_PATH)/libcharset/include \
$(LOCAL_PATH)/srclibLOCAL_SHARED_LIBRARIES := libiconv
include $(BUILD_EXECUTABLE)
执行编译 $ndk-build
1、编译时提示:
libiconv-1.14/jni/libcharset/lib/localcharset.c:51:24: error: langinfo.h: No such file or directory
解决方法:
修改目录文件libcharset/config.h的宏定义,禁止该宏定义:
/* Define if you haveand nl_langinfo(CODESET). */
#define HAVE_LANGINFO_CODESET 0
2、提示错误:
报“c undeclaired”错误
解决方法:
修改文件/libcharset/lib/localcharset.c中函数get_charset_aliases (void)
搜索:int c;
把该变量定义放到该函数的开始处。
执行$ndk-build,编译libiconv.so成功。
到目录libs/armeabi-v7a下可以找到。
如果执行程序则需要打包到Android平台下。