New package linking fails
martin.kuettler at gmail.com
Mon Sep 1 16:45:49 CEST 2014
On 09/01/2014 04:28 PM, Masti Ramya Jayaram wrote:
> Dear all,
> I am trying to create a new package under l4/pkg. The linking of the package fails and it has to do with the linker path but I am not sure how to fix it. Here are the details.
> Package structure: (relevant parts)
> PKGDIR ?= ../..
> L4DIR ?= $(PKGDIR)/../..
> TARGET = $(PKGNAME)
> # list requirements of your program here
> REQUIRES_LIBS = libsigma0 libirq l4util l4re_c-util
> # list your .c or .cc files here
> SRC_C = folder1/test1.c
> SRC_CC = main.cc
> include $(L4DIR)/mk/prog.mk
> The compilation of the package fails with an undefined reference in main.cc to a function in test1.c (defined through test1.h). All the object files are generated and I checked under build. What do you think is the issue?
Did you declare the function with extern "C" linkage in main.cc? Without
that the linker won't find C-functions called from C++-files.
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