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)
l4/pkg/test/server/src/main.cc l4/pkg/test/server/src/folder1/test1.c l4/pkg/test/include/test1.h
l4/pkg/test/server/src/Makefile
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.
Martin