字元轉碼開源庫libiconv目前還不支援64位
最新版的libiconv 1.14目前還不支援64位系統，只能編譯出32位庫。
libiconv 1.14下載地址：
libiconv介紹：
linux系統編譯安裝方法：
$ ./configure --prefix=/usr/local $ make $ make install執行make會報錯：
./stdio.h:1010:1: error: ‘gets’ undeclared here (not in a function)
_GL_WARN_ON_USE (gets, "gets is a security hole - use fgets instead");
^
make[2]: *** [progname.o] 錯誤 1
make[2]:正在離開目錄 `/home/min/projects/libiconv-1.14/srclib'
make[1]: *** [all] 錯誤 2
make[1]:正在離開目錄 `/home/min/projects/libiconv-1.14/srclib'
make: *** [all] 錯誤 2
修改後make可以通過，但執行make install還是會報錯：
/usr/bin/install: cannot create regular file '/usr/local/lib/libcharset.so.1.0.0': Permission denied
make[2]: *** [install] 錯誤 1
make[2]:正在離開目錄 `/home/min/projects/libiconv-1.14/libcharset/lib'
make[1]: *** [install] 錯誤 2
make[1]:正在離開目錄 `/home/min/projects/libiconv-1.14/libcharset'
make: *** [install] 錯誤 2
提示許可權拒絕，需要用管理員許可權安裝，先執行su或者直接用sudo make install安裝。
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Android NDK編譯iconv，參考：ndk編譯iconv
編譯出來的是32位的，64的無法編譯成功。
NDK目錄下的編譯mk檔案也只是編譯了32位庫，Android.mk檔案位於：android-ndk-r10e/sources/android/support
內容如下，iconv.c檔案只再32位庫中編譯
LOCAL_PATH := $(call my-dir)
android_support_c_includes := $(LOCAL_PATH)/include
ifneq ($(filter $(NDK_KNOWN_DEVICE_ABI64S),$(TARGET_ARCH_ABI)),)
# 64-bit ABIs
android_support_sources := \
src/musl-locale/catclose.c \
src/musl-locale/catgets.c \
src/musl-locale/catopen.c
else
# 32-bit ABIs
android_support_sources := \
src/libdl_support.c \
src/locale_support.c \
src/math_support.c \
src/stdlib_support.c \
src/wchar_support.c \
src/locale/duplocale.c \
src/locale/freelocale.c \
src/locale/localeconv.c \
src/locale/newlocale.c \
src/locale/uselocale.c \
src/stdio/stdio_impl.c \
src/stdio/strtod.c \
src/stdio/vfprintf.c \
src/stdio/vfwprintf.c \
src/msun/e_log2.c \
src/msun/e_log2f.c \
src/msun/s_nan.c \
src/musl-ctype/iswalnum.c \
src/musl-ctype/iswalpha.c \
src/musl-ctype/iswblank.c \
src/musl-ctype/iswcntrl.c \
src/musl-ctype/iswctype.c \
src/musl-ctype/iswdigit.c \
src/musl-ctype/iswgraph.c \
src/musl-ctype/iswlower.c \
src/musl-ctype/iswprint.c \
src/musl-ctype/iswpunct.c \
src/musl-ctype/iswspace.c \
src/musl-ctype/iswupper.c \
src/musl-ctype/iswxdigit.c \
src/musl-ctype/towctrans.c \
src/musl-ctype/wcswidth.c \
src/musl-ctype/wctrans.c \
src/musl-ctype/wcwidth.c \
src/musl-locale/catclose.c \
src/musl-locale/catgets.c \
src/musl-locale/catopen.c \
src/musl-locale/iconv.c \
src/musl-locale/intl.c \