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We are using the compiler gcc 4.8, and the gdb 7 debugger. With these settings, one gets the following error when trying to print a variable with gdb with the name "var":
No symbol "var" in current context.
Here is the solution explanation found on stack overflow:
DWARF4 is now the default when generating DWARF debug information. When -g is used on a platform that uses DWARF debugging information, GCC will now default to -gdwarf-4 -fno-debug-types-section. GDB 7.5, Valgrind 3.8.0 and elfutils 0.154 debug information consumers support DWARF4 by default. Before GCC 4.8 the default version used was DWARF2. To make GCC 4.8 generate an older DWARF version use -g together with -gdwarf-2 or -gdwarf-3. The default for Darwin and VxWorks is still -gdwarf-2 -gstrict-dwarf.
Remove the contents of your cmake build directory, and run cmake
again with the correct flags. For example, for albers-core, fcc-edm and
analysis-cpp{.twikiLink} , run the following command
from your cmake build directory:
cmake -DCMAKE_INSTALL_PREFIX=../install -DCMAKE_CXX_FLAGS="-g -gdwarf-2" ..
Compile again:
make -j 4 install
And run gdb on your executable, e.g. :
gdb ./install/bin/fccedm-write
We don't know! Please let us know if you have a solution.
In the meanwhile, install the code on lxplus if you need to debug, and follow these instructions{.twikiCurrentTopicLink .twikiAnchorLink} .
Instead of running make , run:
make VERBOSE=1
-- ColinBernet {.twikiLink} - 2015-01-23