我正在尝试在 ubuntu 13.04 下编译 curl 源代码（版本 7.22.0）以将 libcurl 导入 Android 平台。Android源码（Android-2.2_r1版本）已经编译成功，curl编译环境搭建成功。
编译环境：
Android Source Code version: 2.2_r1
NDK Version:android-ndk-r8e
Curl Souce Code version:7.22.0
GCC version:4.4.7
JDK version:1.5.0_21
下面是为 libcurl 设置编译环境的 configure 命令：
ANDROID_HOME=/home/kevin/Android-Build/working-space && \
NDK_HOME=/home/kevin/Software/android-ndk-r8e && \
PATH="$ANDROID_HOME/prebuilt/linux-x86/toolchain/arm-eabi-4.4.0/bin:$PATH" \
./configure --host=arm-linux CC=arm-eabi-gcc --with-random=/dev/urandom \
CPPFLAGS="-I$NDK_HOME/platforms/android-14/arch-arm/usr/include \
-I $ANDROID_HOME/external/curl/include/ \
-I $ANDROID_HOME/external/curl \
-I $ANDROID_HOME/out/target/product/generic/obj/STATIC_LIBRARIES/libcurl_intermediates \
-I $ANDROID_HOME/dalvik/libnativehelper/include/nativehelper \
-I $ANDROID_HOME/system/core/include \
-I $ANDROID_HOME/hardware/libhardware/include \
-I $ANDROID_HOME/hardware/libhardware_legacy/include \
-I $ANDROID_HOME/hardware/ril/include \
-I $ANDROID_HOME/dalvik/libnativehelper/include \
-I $ANDROID_HOME/frameworks/base/include \
-I $ANDROID_HOME/frameworks/base/opengl/include \
-I $ANDROID_HOME/frameworks/base/native/include \
-I $ANDROID_HOME/external/skia/include \
-I $ANDROID_HOME/out/target/product/generic/obj/include \
-I $ANDROID_HOME/bionic/libc/arch-arm/include \
-I $ANDROID_HOME/bionic/libc/include \
-I $ANDROID_HOME/bionic/libstdc++/include \
-I $ANDROID_HOME/bionic/libc/kernel/common \
-I $ANDROID_HOME/bionic/libc/kernel/arch-arm \
-I $ANDROID_HOME/bionic/libm/include \
-I $ANDROID_HOME/bionic/libm/include/arch/arm \
-I $ANDROID_HOME/bionic/libthread_db/include \
-include $ANDROID_HOME/system/core/include/arch/linux-arm/AndroidConfig.h \
-I $ANDROID_HOME/system/core/include/arch/linux-arm/ \
-D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -DANDROID -DNDEBUG -DNDEBUG -DHAVE_CONFIG_H" \
CFLAGS="-fno-exceptions -Wno-multichar -msoft-float -fpic -ffunction-sections \
-funwind-tables -fstack-protector -Wa,--noexecstack -Werror=format-security \
-fno-short-enums -march=armv5te -mtune=xscale -Wno-psabi -mthumb-interwork \
-fmessage-length=0 -W -Wall -Wno-unused -Winit-self -Wpointer-arith \
-Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point \
-g -Wstrict-aliasing=2 -finline-functions -fno-inline-functions-called-once \
-fgcse-after-reload -frerun-cse-after-loop -frename-registers -UDEBUG \
-mthumb -Os -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64 \
-Wpointer-arith -Wwrite-strings -Wunused -Winline -Wnested-externs \
-Wmissing-declarations -Wmissing-prototypes -Wno-long-long -Wfloat-equal \
-Wno-multichar -Wsign-compare -Wno-format-nonliteral -Wendif-labels \
-Wstrict-prototypes -Wdeclaration-after-statement -Wno-system-headers" \
LIBS="-nostdlib -Bdynamic -Wl,-T,$ANDROID_HOME/build/core/armelf.x \
-Wl,-dynamic-linker,/system/bin/linker -Wl,--gc-sections -Wl,-z,nocopyreloc \
-L$ANDROID_HOME/out/target/product/generic/obj/lib -Wl,-z,noexecstack \
-Wl,-rpath-link=$ANDROID_HOME/out/target/product/generic/obj/lib \
-lc -llog -lcutils -lstdc++ \
-Wl,--no-undefined $ANDROID_HOME/prebuilt/linux-x86/toolchain/arm-eabi-4.4.0/lib/gcc/arm-eabi/4.4.0/libgcc.a \
$ANDROID_HOME/out/target/product/generic/obj/lib/crtend_android.o \
-lm $ANDROID_HOME/out/target/product/generic/obj/lib/crtbegin_dynamic.o"
执行 config 命令后，我可以从 external/curl 目录下的 config.log 文件中看到以下内容
configure:21303: checking zlib.h usability
configure:21303: $? = 0
configure:21303: result: yes
configure:21303: checking zlib.h presence
configure:21303: $? = 0
configure:21303: result: yes
configure:21303: checking for zlib.h
configure:21303: result: yes
configure:21384: found both libz and libz.h header
我还检查了目录：$NDK_HOME/platforms/android-14/arch-arm/usr/include并确保 zlib.h 文件确实存在。
问题：当我尝试使用命令编译 libcurl 时，编译make libcurl失败。我得到的错误是：
In file included from external/curl/lib/base64.c:30:
external/curl/lib/urldata.h:141:59: error: zlib.h: No such file or directory
In file included from external/curl/lib/base64.c:30:
external/curl/lib/urldata.h:585: error: expected specifier-qualifier-list before 'z_stream'
这真的让我很沮丧，因为该文件确实存在并且在配置步骤中找到。
解决方案尝试： 我尝试将 NDK_HOME 中 zlib.h 文件的绝对路径添加到位于 external/curl 目录的 Android.mk 文件中，如下所示。
LOCAL_C_INCLUDES += $(LOCAL_PATH)/include/ /home/kevin/Software/android-ndk-r8e/platforms/android-14/arch-arm/usr/include
原来错误消失了，编译成功了，但是在程序中使用curl库时，出现如下错误：
/home/kevin/Software/android-ndk-r8e/platforms/android-14/arch-arm/usr/lib/libcurl.a(content_encoding.o): in function Curl_unencode_deflate_write:external/curl/lib/content_encoding.c:180: error: undefined reference to 'inflateInit_'
有人有同样的问题吗？任何帮助是极大的赞赏。