无法为OpenWRT编译C 上的helloworld

Cannot compile package Helloworld on C++ for OpenWrt

本文关键字：上的 helloworld 编译 OpenWRT      更新时间：2023-10-16

我正在尝试为OpenWrt编译简单的Helloworld程序（使用Build System，分支17.01.6）。我使用了两个教程：官方网站上的Helloworld教程和埃里克·毕晓普（Eric Bishop），第2部分for C 。

但是在编译Helloworld包装期间，我有错误：Package helloworld is missing dependencies for the following libraries: libc.so.6

文件的结构：
。
├-openwrt_17_01
＆nbsp;＆nbsp;＆nbsp; nbsp; source #source目录，构建系统
＆nbsp;＆nbsp;＆nbsp;├-helloworld #helloworld project
＆nbsp;＆nbsp;＆nbsp;＆nbsp; |＆nbsp;＆nbsp;＆nbsp;＆nbsp; |＆nbsp;＆nbsp;＆nbsp;＆nbsp; |＆nbsp;＆nbsp; nbsp; nbsp;└--mypackages
"＆nbsp;＆nbsp;＆nbsp;＆nbsp;＆nbsp; nbsp; nbsp; nbsp; nbsp; nbsp; nbsp; nbsp; nbsp; nbsp; nbsp; nbsp; nbsp; nblowerld
＆nbsp;＆nbsp;＆nbsp;＆nbsp;＆nbsp;＆nbsp; nbsp; nbsp; nbsp;＆nbsp;＆nbsp;＆nbsp; nbsp; nbsp; nbsp; nbsp;＆nbsp;＆nbsp;＆nbsp;＆nbsp;

OpenWrt_17_01/helloworld/src/helloworld.cpp：

#include "stdio.h"
int main()
{
    printf("Hello, world! (C++)nn");
    return 0;
}

OpenWrt_17_01/helloworld/src/makefile：

helloworld: helloworld.o
    $(CXX) $(LDFLAGS) helloworld.o -o helloworld $(LIBS)
helloworld.o: helloworld.cpp
    $(CXX) $(CXXFLAGS) -c helloworld.cpp
clean:
    rm *.o helloworld

mypackages/示例/helloworld/makefile：

include $(TOPDIR)/rules.mk
PKG_NAME:=helloworld
PKG_VERSION:=1.0
PKG_RELEASE:=1
SOURCE_DIR:=/home/mzhi/proj_src/openwrt_17_01/helloworld
PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)
include $(INCLUDE_DIR)/package.mk
define Package/helloworld
    SECTION:=examples
    DEPENDS:= +libstdcpp +libc
    CATEGORY:=Examples
    TITLE:=Hello, World!
endef
define Package/helloworld/description
    A simple "Hello, world!" -application.
endef
define Build/Prepare
    mkdir -p $(PKG_BUILD_DIR)
    $(CP) $(SOURCE_DIR)/src/* $(PKG_BUILD_DIR)/
endef
define Build/Compile
    $(MAKE) -C $(PKG_BUILD_DIR) 
    LIBS="-nodefaultlibs -lgcc -lc -luClibc++" 
    LDFLAGS="$(EXTRA_LDFLAGS)" 
    CXXFLAGS="$(TARGET_CFLAGS) $(EXTRA_CPPFLAGS) -nostdinc++" 
    $(TARGET_CONFIGURE_OPTS) 
    CROSS="$(TARGET_CROSS)" 
    ARCH="$(ARCH)" 
    $(1);
endef
define Package/helloworld/install
    $(INSTALL_DIR) $(1)/usr/bin
    $(INSTALL_BIN) $(PKG_BUILD_DIR)/helloworld $(1)/usr/bin
endef
$(eval $(call BuildPackage,helloworld))

汇编的全部输出（制作包/helloworld/compile -j1 v = s）：

make[1]: Entering directory 
'/home/mzhi/proj_src/openwrt_17_01/openwrt'
make[2]: Entering directory 
'/home/mzhi/proj_src/openwrt_17_01/openwrt/package/libs/toolchain'
if [ -f /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target- mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install.clean ]; then rm -f /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install.clean; fi
echo "libc" >> 
/home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install
if [ -f /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install.clean ]; then rm -f /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install.clean; fi
echo "libgcc" >> 
/home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install
if [ -f /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install.clean ]; then rm -f /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install.clean; fi
if [ -f /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install.clean ]; then rm -f /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install.clean; fi
if [ -f /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install.clean ]; then rm -f /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install.clean; fi
echo "libstdcpp" >> 
/home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install
if [ -f /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install.clean ]; then rm -f /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install.clean; fi
echo "libpthread" >> 
/home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install
if [ -f /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install.clean ]; then rm -f /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install.clean; fi
if [ -f /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install.clean ]; then rm -f /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install.clean; fi
echo "librt" >> 
/home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install
if [ -f /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install.clean ]; then rm -f /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install.clean; fi
if [ -f /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install.clean ]; then rm -f /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install.clean; fi
if [ -f /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install.clean ]; then rm -f /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo/toolchain.default.install.clean; fi
make[2]: Leaving directory '/home/mzhi/proj_src/openwrt_17_01/openwrt/package/libs/toolchain'
make[2]: Entering directory '/home/mzhi/proj_src/openwrt_17_01/mypackages/examples/helloworld'
mkdir -p /home/mzhi/proj_src/openwrt_17_01/openwrt/bin/targets/ramips/mt7621/packages /home/mzhi/proj_src/openwrt_17_01/openwrt/build_dir/target-mipsel_24kc_musl-1.1.16/helloworld/ipkg-mipsel_24kc/helloworld/CONTROL /home/mzhi/proj_src/openwrt_17_01/openwrt/staging_dir/target-mipsel_24kc_musl-1.1.16/pkginfo
install -d -m0755 /home/mzhi/proj_src/openwrt_17_01/openwrt/build_dir/target-mipsel_24kc_musl-1.1.16/helloworld/ipkg-mipsel_24kc/helloworld/usr/bin
install -m0755 /home/mzhi/proj_src/openwrt_17_01/openwrt/build_dir/target-mipsel_24kc_musl-1.1.16/helloworld/helloworld /home/mzhi/proj_src/openwrt_17_01/openwrt/build_dir/target-mipsel_24kc_musl-1.1.16/helloworld/ipkg-mipsel_24kc/helloworld/usr/bin
find /home/mzhi/proj_src/openwrt_17_01/openwrt/build_dir/target-mipsel_24kc_musl-1.1.16/helloworld/ipkg-mipsel_24kc/helloworld -name 'CVS' -o -name '.svn' -o -name '.#*' -o -name '*~'| xargs -r rm -rf
Package helloworld is missing dependencies for the following libraries:
libc.so.6
Makefile:65: recipe for target '/home/mzhi/proj_src/openwrt_17_01/openwrt/bin/packages/mipsel_24kc/mypackages/helloworld_1.0-1_mipsel_24kc.ipk' failed
make[2]: *** [/home/mzhi/proj_src/openwrt_17_01/openwrt/bin/packages/mipsel_24kc/mypackages/helloworld_1.0-1_mipsel_24kc.ipk] Error 1
make[2]: Leaving directory '/home/mzhi/proj_src/openwrt_17_01/mypackages/examples/helloworld'
package/Makefile:105: recipe for target 'package/feeds/mypackages/helloworld/compile' failed
make[1]: *** [package/feeds/mypackages/helloworld/compile] Error 2
make[1]: Leaving directory '/home/mzhi/proj_src/openwrt_17_01/openwrt'
/home/mzhi/proj_src/openwrt_17_01/openwrt/include/toplevel.mk:205: recipe for target 'package/helloworld/compile' failed
make: *** [package/helloworld/compile] Error 2

操作系统：Ubuntu 16.04
目标系统：Mediatek Ralink Mips
子目标：基于MT7621的董事会
目标配置文件：ubiquiti edgerouter x

谷歌搜索了很多，但是我仍然不明白为什么编译器看不到必要的库libc.so..6以及如何在makefile

中正确连接它

也许有人已经面临类似的问题，请分享解决方案。

如何将您的Makefile更改为此？

BINARY  = helloworld$(EXE)
FILES   = helloworld.o
all: $(BINARY)
helloworld$(EXE): $(FILES)
    $(CC) $(FILES) -o $(@)
clean:
    rm -f $(FILES) *.o

和该代码：

#include <stdio.h>
int main()
{
    printf("Hello, world! (C++)nn");
    return 0;
}

您想要的答案在这里：https：//fleshandmachines.wordpress.com/2011/08/22/openwrt-cc-programing/

您必须更改$(CXX)的$(CC)和$(CXXFLAGS)

的$(CFLAGS)
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