c++ - Cmake cannot find Boost any longer -


until yesterday, program compiled , linked correctly. since today, same program (same source , same environment), not link. boost library not found.

top of cmakelists.txt file:

... find_package (boost required) set (boost_use_static_libs on) set (boost_use_multithreaded off) set (boost_use_static_runtime off) find_package (boost components program_options)  if (boost_found)     include_directories(${boost_include_dirs}) endif() ...

running cmake:

cmake -dcmake_build_type=release -dbuild_documentation=on ../numberpuncher/ -- c compiler identification gnu 4.7.1 -- cxx compiler identification gnu 4.7.1 -- check working c compiler: /usr/bin/gcc -- check working c compiler: /usr/bin/gcc -- works -- detecting c compiler abi info -- detecting c compiler abi info - done -- check working cxx compiler: /usr/bin/c++ -- check working cxx compiler: /usr/bin/c++ -- works -- detecting cxx compiler abi info -- detecting cxx compiler abi info - done -- boost version: 1.49.0 -- not find boost -- configuring done -- generating done -- build files have been written to: /swenvironment/sw/numberpuncher_prj/release

the line:

-- boost version: 1.49.0

is wrong, since boost have installed 1.54.0. however, in cmakelists.txt file, boost version not specified , not need be.

building program, link errors relative boost of kind:

entrypoint.cpp:(.text.startup+0x6be): undefined reference `boost::program_options::options_description::add_options()'

at first thought directory containing boost had been removed, still there.

i made clean build, rerunning cmake, problem remains.

any idea?

environment:
linux opensuse 12.2
gcc/g++ 4.7.1
boost 1.54.0

moving find_package(boost components program_options) command find_package(boost required) fixed problem:

find_package (boost components program_options) set (boost_use_static_libs on) set (boost_use_multithreaded off) set (boost_use_static_runtime off)

i still cannot understand why has worked in past. if clarify appreciate. anyway should work in future, too.


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