的libjpeg涡轮增压为Android [英] libjpeg-turbo for android

问题描述

我需要的libjpeg涡轮增压为Android NDK。有没有人设法将其编译为.A（静态）LIB？ 我已经尝试了几次，但它给了我很多的错误而已。

I need libjpeg-turbo for android ndk. Did anyone managed to compile it as .a (static) lib? I have tried a few times, but it gave me a lot of errors only.

推荐答案

安装Android NDK 。下面的说明与被验证的 R8B ，旧版本可能有问题，我不知道。

Install Android NDK. Following instructions were verified with r8b, older versions may have problems, I don't know.

获取Android源从本杰明Gaignard 的libjpeg涡轮增压：

Get the Android sources for libjpeg-turbo from Benjamin Gaignard:

git clone git://git.linaro.org/people/tomgall/libjpeg-turbo/libjpeg-turbo.git -b linaro-android

在的libjpeg涡轮增压由混帐，编辑文件创建目录 Android.mk ：行70后， LOCAL_MODULE：=的libjpeg ，添加以下内容：

In the libjpeg-turbo directory created by git, edit file Android.mk: after line 70, LOCAL_MODULE := libjpeg, add the following:

ifeq ($(notdir $(MAKECMDGOALS)),libjpeg.a)
  LOCAL_SRC_FILES +=  $(libsimd_SOURCES_DIST)
  include $(BUILD_STATIC_LIBRARY)
  include $(CLEAR_VARS)
  LOCAL_MODULE := dummy
endif

运行 NDK建造

ndk-build NDK_PROJECT_PATH=. APP_BUILD_SCRIPT=./Android.mk obj/local/armeabi/libjpeg.a

利润！的

PS：您可能希望在 armeabi-V7A 版本：

ndk-build NDK_PROJECT_PATH=. APP_BUILD_SCRIPT=./Android.mk APP_ABI=armeabi-v7a obj/local/armeabi-v7a/libjpeg.a

或者编译 ARM ，以提高性能，添加到命令行：

Or compile for ARM, to improve performance, add to command line:

LOCAL_ARM_MODE=arm

如果你的目标有 NEON 的支持，添加到命令行：

If your target has NEON support, add to command line:

LOCAL_ARM_NEON=true ARCH_ARM_HAVE_NEON=true

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