Dependency issue when adding new package

For Developers
1

I try to follow the topic to add Hello World package. But in the Migrating to use GNU make in your application topic, there is a dependency issue when I use Make to build the package.

The error message is follow:

Package helloworld is missing dependencies for the following libraries:
libc.so.6

Has anyone encountered the same problem?

2

libc.so.6 is the current soname of GNU libc, means your executable likely wasn't cross compiled but built for the host. This can either happen when your Makefile uses the wrong gcc, or - which is more likely when sticking to the examples - your C source directory is not clean and already contains precompiled object files or final executables made for the host.

Make sure that your source directory is clean and contains only *.c, *.h etc. files and no *.o ones or ELF executables.

1 Like
3

I'm sure that my source directory is clean and only have helloworld.c and Makefile in the folder.
I try to find solution on internet, once I add '$(CP) /lib/x86_64-linux-gnu/libc.so.6 $(1)/usr/bin' in the Package install instructions. It can be compiled successfully, but the package not work when I install in openwrt.

4

The please provide the actual OpenWrt Makefile and - if applicable - the inner Makefile as well here. It seems to me that you're using the wrong compiler for building your sources.

5

I don't modify the OpenWrt Make file, and the helloworld Make file is follow the guide. I share the Makefile on dropbox, please help to check, thanks.
OpenWrt Makefile: https://www.dropbox.com/s/26b12d0ylr5pc7u/Makefile_openwrt?dl=0
Helloword Makefile: https://www.dropbox.com/s/cpgbco0f5bcqul1/Makefile_helloworld?dl=0

6

Your helloworld Makefile is broken. You need to change

define Build/Compile
	$(MAKE) -C $(PKG_BUILD_DIR)
	CC="$(TARGET_CC)" 
	CFLAGS="$(TARGET_CFLAGS)"  
	LDFLAGS="$(TARGET_LDFLAGS)"
endef

into

define Build/Compile
	$(MAKE) -C $(PKG_BUILD_DIR) \
		CC="$(TARGET_CC)" \
		CFLAGS="$(TARGET_CFLAGS)" \
		LDFLAGS="$(TARGET_LDFLAGS)"
endef

Note the line continuation (\) character at the end which forces the CC, CFLAGS and LDFLAGS assignments to be part of the $(MAKE) command.

1 Like
7

After change to you solution, there is another error

i486-openwrt-linux-musl-gcc: fatal error: no input files

It seems directory error...
But I try to use original method, It can build succeed.

define Build/Compile
$(TARGET_CC) $(TARGET_CFLAGS) -o $(PKG_BUILD_DIR)/helloworld.o -c $(PKG_BUILD_DIR)/helloworld.c
$(TARGET_CC) $(TARGET_LDFLAGS) -o $(PKG_BUILD_DIR)/$1 $(PKG_BUILD_DIR)/helloworld.o
endef

8

I had the exact issue, after I re-edited the compile part of Makefile, it worked for me by issue: make -j1 package/helloworld/{clean,compile}:

define Build/Compile
$(MAKE) -C $(PKG_BUILD_DIR) CC="$(TARGET_CC)" CFLAGS="$(TARGET_CFLAGS)" LDFLAGS="$(TARGET_LDFLAGS)"
endef
9

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