Question

在C库上创建进程，导致与architecure相关的链接错误。我正在尝试为iOS构建库，但它已经依赖于libxml2，在这种情况下我猜是Mac只有库

lipo -info确认相同的

admin $ lipo -info /usr/local/lib/libxml2.dylib 非胖文件：/usr/local/lib/libxml2.dylib是架构：x86_64

ld：警告：忽略文件/usr/local/lib/libxml2.dylib，文件是为x86_64构建，而不是被链接的架构（armv7）： /usr/local/lib/libxml2.dylib架构armv7的未定义符号：＆＃34; _xmlAddChild＆＃34;，引自： libspatialite.a中的_setIsoId（gg_xml.o）引自： libspatialite.a中的_vxpath_eval_expr（libsplite_la-virtualxpath.o）ld：找不到符号对于体系结构armv7 clang：错误：链接器命令因退出而失败代码1（使用-v查看调用）make [4]： * [demo1]错误1 make [3]： [install-recursive]错误1 make [2]： [install-strip] 错误2使1：* [/Users/admin/Downloads/libspatialite-ios-master/build/armv7/lib/libspatialite.a] 错误2：*** [build_arches]错误2

修改＃1

在评论后，make文件中的libspatailite配置和make部分，我注意到其他依赖项如get，proj，sqlite正在为所有平台armv7，armv7s，arm64，i386，x86_64生成。

这些图书馆的lipo -info确认了同样的问题。所以问题仅限于建立libspatialite。

Makefile（仅构建libspatialite.a）

XCODE_DEVELOPER = $(shell xcode-select --print-path)
IOS_PLATFORM ?= iPhoneOS

# Pick latest SDK in the directory
IOS_PLATFORM_DEVELOPER = ${XCODE_DEVELOPER}/Platforms/${IOS_PLATFORM}.platform/Developer
IOS_SDK = ${IOS_PLATFORM_DEVELOPER}/SDKs/$(shell ls ${IOS_PLATFORM_DEVELOPER}/SDKs | sort -r | head -n1)

all: lib/libspatialite.a
lib/libspatialite.a: build_arches
    mkdir -p lib
    mkdir -p include

    # Copy includes
    cp -R build/armv7/include/geos include
    cp -R build/armv7/include/spatialite include
    cp -R build/armv7/include/*.h include

    # Make fat libraries for all architectures
    for file in build/armv7/lib/*.a; \
        do name=`basename $$file .a`; \
        lipo -create \
            -arch armv7 build/armv7/lib/$$name.a \
            -arch armv7s build/armv7s/lib/$$name.a \
            -arch arm64 build/arm64/lib/$$name.a \
            -arch i386 build/i386/lib/$$name.a \
            -arch x86_64 build/x86_64/lib/$$name.a \
            -output lib/$$name.a \
        ; \
        done;

# Build separate architectures
build_arches:
    ${MAKE} arch ARCH=armv7 IOS_PLATFORM=iPhoneOS HOST=arm-apple-darwin
    ${MAKE} arch ARCH=armv7s IOS_PLATFORM=iPhoneOS HOST=arm-apple-darwin
    ${MAKE} arch ARCH=arm64 IOS_PLATFORM=iPhoneOS HOST=arm-apple-darwin
    ${MAKE} arch ARCH=i386 IOS_PLATFORM=iPhoneSimulator HOST=i386-apple-darwin
    ${MAKE} arch ARCH=x86_64 IOS_PLATFORM=iPhoneSimulator HOST=x86_64-apple-darwin

PREFIX = ${CURDIR}/build/${ARCH}
LIBDIR = ${PREFIX}/lib
BINDIR = ${PREFIX}/bin
INCLUDEDIR = ${PREFIX}/include

CXX = ${XCODE_DEVELOPER}/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++
CC = ${XCODE_DEVELOPER}/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
CFLAGS = -isysroot ${IOS_SDK} -I${IOS_SDK}/usr/include -arch ${ARCH} -I${INCLUDEDIR} -miphoneos-version-min=7.0
CXXFLAGS = -stdlib=libc++ -std=c++11 -isysroot ${IOS_SDK} -I${IOS_SDK}/usr/include -arch ${ARCH} -I${INCLUDEDIR} -miphoneos-version-min=7.0
LDFLAGS = -stdlib=libc++ -isysroot ${IOS_SDK} -L${LIBDIR} -L${IOS_SDK}/usr/lib -arch ${ARCH} -miphoneos-version-min=7.0

arch: ${LIBDIR}/libspatialite.a

${LIBDIR}/libspatialite.a: ${LIBDIR}/libproj.a ${LIBDIR}/libgeos.a ${LIBDIR}/libsqlite3.a ${CURDIR}/spatialite
    cd spatialite && env \
    CXX=${CXX} \
    CC=${CC} \
    CFLAGS="${CFLAGS} -Wno-error=implicit-function-declaration" \
    CXXFLAGS="${CXXFLAGS} -Wno-error=implicit-function-declaration" \
    LDFLAGS="${LDFLAGS} -liconv -lgeos -lgeos_c -lc++" ./configure --host=${HOST} --disable-freexl --prefix=${PREFIX} --with-geosconfig=${BINDIR}/geos-config --disable-shared && make clean install-strip


clean:
    rm -rf build geos proj spatialite sqlite3 include lib

@ gagan-ios，@ kristina-brooks - 似乎在bioite目录中的Makefile是从Makefile上面自动生成的。我不知道如何控制lib，包含动态的libxml2路径。

EDIT2 另一个级别的调查显示，为i386和x86_64生成了库，并且没有为armv7，armv7s和arm64生成

$ {MAKE} arch ARCH = armv7 IOS_PLATFORM = iPhoneOS HOST = arm-apple-darwin $ {MAKE} arch ARCH = armv7s IOS_PLATFORM = iPhoneOS HOST = arm-apple-darwin $ {MAKE} arch ARCH = arm64 IOS_PLATFORM = iPhoneOS HOST = arm-apple-darwin $ {MAKE} arch ARCH = i386 IOS_PLATFORM = iPhoneSimulator HOST = i386-apple-darwin $ {MAKE} arch ARCH = x86_64 IOS_PLATFORM = iPhoneSimulator HOST = x86_64-apple-darwin

Answer 1

iPhoneOS SDK中应该包含一个合适的libxml2存根，只需将-lxml2添加到链接器标志即可。我猜你已经明确指定了libxml2.dylib的绝对路径，而不是让链接器使用SDK相对路径，所以你试图将ARM静态库与x86_64版本链接起来您的操作系统发行版中的libxml2。

Answer 2

最后能够在Compiling external C++ library for use with iOS project

的Makefile帮助下找到解决方法

解决方法是两个不同的make文件的合并，并涉及以下步骤。

1.部分使用Makefile为所有依赖平台生成库（专业版，地理位置，sqlite3）https://github.com/gstf/libspatialite-ios

2.使用Compiling external C++ library for use with iOS project

中的Makefile从源代码编译libxml2

3. Compiling external C++ library for use with iOS project的Makefile用于为所有平台生成空间图库

4.使用步骤＃1 Makefile中的lipo生成脂肪库

 public void operate(){
        super.operate(); // call the method from super class

    }

将这些库添加到新的Xcode项目并开始使用它。那么这是我第一次成功使用这个库

包含这些库

#!/bin/bash

PLATFORMPATH="/Applications/Xcode.app/Contents/Developer/Platforms"
TOOLSPATH="/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin"
export IPHONEOS_DEPLOYMENT_TARGET="8.0"
pwd=`pwd`

findLatestSDKVersion()
{
    sdks=`ls $PLATFORMPATH/$1.platform/Developer/SDKs`
    arr=()
    for sdk in $sdks
    do
       arr[${#arr[@]}]=$sdk
    done

    # Last item will be the current SDK, since it is alpha ordered
    count=${#arr[@]}
    if [ $count -gt 0 ]; then
       sdk=${arr[$count-1]:${#1}}
       num=`expr ${#sdk}-4`
       SDKVERSION=${sdk:0:$num}
    else
       SDKVERSION="8.0"
    fi
}

buildit()
{
    target=$1
    hosttarget=$1
    platform=$2

    if [[ $hosttarget == "x86_64" ]]; then
        hostarget="i386"
    elif [[ $hosttarget == "arm64" ]]; then
        hosttarget="arm"
    fi

    export CC="$(xcrun -sdk iphoneos -find clang)"
    export CPP="$CC -E"
    export CFLAGS="-arch ${target} -isysroot $PLATFORMPATH/$platform.platform/Developer/SDKs/$platform$SDKVERSION.sdk -miphoneos-version-min=$SDKVERSION"
    export AR=$(xcrun -sdk iphoneos -find ar)
    export RANLIB=$(xcrun -sdk iphoneos -find ranlib)
    export CPPFLAGS="-arch ${target}  -isysroot $PLATFORMPATH/$platform.platform/Developer/SDKs/$platform$SDKVERSION.sdk -miphoneos-version-min=$SDKVERSION"
    export LDFLAGS="-arch ${target} -isysroot $PLATFORMPATH/$platform.platform/Developer/SDKs/$platform$SDKVERSION.sdk"

    mkdir -p $pwd/output/$target

     ./configure --prefix="$pwd/output/$target" --disable-shared --disable-sqlite --host=$hosttarget-apple-darwin

    make clean
    make
    make install
}

findLatestSDKVersion iPhoneOS

buildit armv7 iPhoneOS
buildit armv7s iPhoneOS
buildit arm64 iPhoneOS
buildit i386 iPhoneSimulator
buildit x86_64 iPhoneSimulator

使用以下API获取Spatialite版本

#include <sqlite3.h>
#include <spatialite/gaiageo.h>
#include <spatialite.h>

输出

spatialite_init(0);
printf("Spatialite version: %s\n", spatialite_version());

iOS库

2 个答案: