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Topic: Simple hello world program error

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Post #1
sukesh.chand
15 Nov 2017, 17:38

I am trying to learn OpenWRT.
I have downloaded the sdk.
Created a simple helloworld.cpp file inside the packages\helloworld folder
created the following Makefile inside the packages\helloworld

======================Makefile==================================
include $(TOPDIR)/rules.mk

PKG_NAME:=helloworld
PKG_RELEASE:=1

PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)


include $(INCLUDE_DIR)/package.mk

define Package/helloworld
    SECTION:=utils
    CATEGORY:=Utilities
    TITLE:=Helloworld -- prints a snarky message
    Package/PKG_NAME/description:=\
    If you can't figure out what this program does, \\\
    you're probably brain-dead and need immediate \\\
    medical attention.
endef

define Build/Prepare
    mkdir -p $(PKG_BUILD_DIR)
    $(CP) ./src/* $(PKG_BUILD_DIR)/
endef

define Package/helloworld/install
    $(INSTALL_DIR) $(1)/bin
    $(INSTALL_BIN) $(PKG_BUILD_DIR)/helloworld $(1)/bin/
endef

$(eval $(call BuildPackage,helloworld))
======================Makefile==================================

After that I ran make command from the sdk root

I am getting the following error

naro_uClibc-0.9.33.2$ make V=s
make[1]: Entering directory '/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2'
make[2]: Entering directory '/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2'
make[3]: Entering directory '/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2/package/helloworld'
CFLAGS="-O2 -pipe -march=i486 -fno-caller-saves -fhonour-copts -Wno-error=unused-but-set-variable  -I/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2/staging_dir/target-i386_uClibc-0.9.33.2/usr/include -I/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2/staging_dir/target-i386_uClibc-0.9.33.2/include -I/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2/staging_dir/toolchain-i386_gcc-4.6-linaro_uClibc-0.9.33.2/usr/include -I/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2/staging_dir/toolchain-i386_gcc-4.6-linaro_uClibc-0.9.33.2/include " CXXFLAGS="-O2 -pipe -march=i486 -fno-caller-saves -fhonour-copts -Wno-error=unused-but-set-variable  -I/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2/staging_dir/target-i386_uClibc-0.9.33.2/usr/include -I/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2/staging_dir/target-i386_uClibc-0.9.33.2/include -I/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2/staging_dir/toolchain-i386_gcc-4.6-linaro_uClibc-0.9.33.2/usr/include -I/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2/staging_dir/toolchain-i386_gcc-4.6-linaro_uClibc-0.9.33.2/include " LDFLAGS="-L/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2/staging_dir/target-i386_uClibc-0.9.33.2/usr/lib -L/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2/staging_dir/target-i386_uClibc-0.9.33.2/lib -L/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2/staging_dir/toolchain-i386_gcc-4.6-linaro_uClibc-0.9.33.2/usr/lib -L/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2/staging_dir/toolchain-i386_gcc-4.6-linaro_uClibc-0.9.33.2/lib " make -j1 -C /home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2/build_dir/target-i386_uClibc-0.9.33.2/helloworld/. AR=i486-openwrt-linux-uclibc-ar AS="ccache_cc -c -O2 -pipe -march=i486 -fno-caller-saves -fhonour-copts -Wno-error=unused-but-set-variable" LD=i486-openwrt-linux-uclibc-ld NM=i486-openwrt-linux-uclibc-nm CC="ccache_cc" GCC="ccache_cc" CXX="ccache_cxx" RANLIB=i486-openwrt-linux-uclibc-ranlib STRIP=i486-openwrt-linux-uclibc-strip OBJCOPY=i486-openwrt-linux-uclibc-objcopy OBJDUMP=i486-openwrt-linux-uclibc-objdump SIZE=i486-openwrt-linux-uclibc-size CROSS="i486-openwrt-linux-uclibc-" ARCH="i386" ;
make[4]: Entering directory '/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2/build_dir/target-i386_uClibc-0.9.33.2/helloworld'
make[4]: *** Notargets specified and no makefile found.  Stop.
make[4]: Leaving directory '/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2/build_dir/target-i386_uClibc-0.9.33.2/helloworld'
Makefile:32: recipe for target '/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2/build_dir/target-i386_uClibc-0.9.33.2/helloworld/.built' failed
make[3]: *** [/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2/build_dir/target-i386_uClibc-0.9.33.2/helloworld/.built] Error 2
make[3]: Leaving directory '/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2/package/helloworld'
package/Makefile:105: recipe for target 'package/helloworld/compile' failed
make[2]: *** [package/helloworld/compile] Error 2
make[2]: Leaving directory '/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2'
package/Makefile:101: recipe for target '/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2/staging_dir/target-i386_uClibc-0.9.33.2/stamp/.package_compile' failed
make[1]: *** [/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2/staging_dir/target-i386_uClibc-0.9.33.2/stamp/.package_compile] Error 2
make[1]: Leaving directory '/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2'
/home/sukesh/Desktop/SDK/OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2/include/toplevel.mk:144: recipe for target 'world' failed
make: *** [world] Error 2

Can anyone please help me to find out what is the error?

(Last edited by sukesh.chand on 15 Nov 2017, 18:50)

Post #2
Antek
15 Nov 2017, 21:20

Although it won't immediately solve your problem, I recommend you check the "Hello, world!" article series for LEDE. The build system is almost the same. The series gives you a good overview on how to build stuff.

https://lede-project.org/docs/guide-dev … orld/start

Post #3
sukesh.chand
16 Nov 2017, 08:12

Hi,
Thanks for the replay.

I have tried the build system from the above link, it has so many steps to configure. I am bit confused.

Actually I have downloaded pre build sdk (OpenWrt-SDK-x86-for-linux-i486-gcc-4.6-linaro_uClibc-0.9.33.2) from the downloads.openwrt.org and trying to build. then the above error is happening.

Can you able to tell me why the following error is related to.
make[4]: *** Notargets specified and no makefile found.  Stop.

The discussion might have continued from here.