【发布时间】：2017-05-09 03:57:55
【问题描述】：
在 C 库上创建过程会导致与架构相关的链接错误。我正在尝试为 iOS 构建库，但它依赖于 libxml2，在这种情况下我猜这是仅限 Mac 的库
lipo -info 也证实了这一点
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，它不是被链接的架构（armv7）： /usr/local/lib/libxml2.dylib 架构 armv7 的未定义符号： “_xmlAddChild”，引用自： libspatialite.a(gg_xml.o) 中的 _setIsoId 参考自： libspatialite.a(libsplite_la-virtualxpath.o) ld 中的 _vxpath_eval_expr：未找到符号 对于架构 armv7 clang：错误：链接器命令失败并退出 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 make1: * [/Users/admin/Downloads/libspatialite-ios-master/build/armv7/lib/libspatialite.a] 错误 2 make: *** [build_arches] 错误 2
编辑#1
在对 make 文件中的 libspatailite 配置和 make 部分进行注释后，我注意到其余的依赖项，如 get、proj、sqlite 正在为所有平台 armv7、armv7s、arm64、i386、x86_64 生成。
这些库上的 lipo -info 确认相同。所以问题仅限于构建 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 - 似乎空间目录中的 Makefile 是从 Makefile 上方自动生成的。我不确定如何控制 lib，动态包含 libxml2 的路径。
编辑2 进一步的调查显示，为 i386 和 x86_64 生成了库，而为 armv7、armv7s 和 arm64 生成了库
${MAKE} ARCH=armv7 IOS_PLATFORM=iPhoneOS HOST=arm-apple-darwin ${MAKE} 拱 ARCH=armv7s IOS_PLATFORM=iPhoneOS 主机=arm-apple-darwin ${MAKE} 拱 ARCH=arm64 IOS_PLATFORM=iPhoneOS 主机=arm-apple-darwin ${MAKE} 拱 ARCH=i386 IOS_PLATFORM=iPhoneSimulator HOST=i386-apple-darwin ${MAKE} ARCH=x86_64 IOS_PLATFORM=iPhoneSimulator HOST=x86_64-apple-darwin
【问题讨论】：
-
检查集成并按照 SDK 文档中的建议添加其他链接器标志。
标签： c++ ios c libxml2 spatialite