use_prebuilt_binary(jsoncpp)
  if (WINDOWS)
    set(JSONCPP_LIBRARIES
      debug json_vc80d
      optimized json_vc80)
  elseif (DARWIN)
    set(JSONCPP_LIBRARIES json_mac-universal-gcc_libmt)
  elseif (LINUX)
    set(JSONCPP_LIBRARIES jsoncpp)
  endif (WINDOWS)
  set(JSONCPP_INCLUDE_DIRS ${LIBS_PREBUILT_DIR}/include/jsoncpp)

(that's just the JsonCpp.cmake without the if(standalone) conditional around it)

I've never tried this myself, so I can't vouch for if it's going to be remotely successful. I can easily see it failing at the "use_prebuild_library(jsoncpp)" part if standalone is defined. If that happens, you can try manually downloading the appropriate prebuilt, unpacking in your tree, and edit that line out of the file.

BTW, I compiled a 64-bit Linux version of JsonCpp while I was updating libraries yesterday, which you can grab from the location in the patch on SNOW-241. In particular, the Linux 64-bit library is http://s3.amazonaws.com/viewer-source-downloads/install_pkgs/jsoncpp-svn-r69-linux64-20090922.tar.bz2

Here's the latest source:
http://bitbucket.org/rob_linden/jsoncpp/get/tip.tar.bz2

Here's the changelog of the Linden mods:
http://bitbucket.org/rob_linden/jsoncpp/changesets/

More info on the library can be found upstream:
http://jsoncpp.sourceforge.net/

Revision 2785

Fix for SNOW-240 (Fix up standalone builds to find jsoncpp)

Files affected:
U projects/2009/snowglobe/trunk/doc/contributions.txt
A projects/2009/snowglobe/trunk/indra/cmake/FindJsonCpp.cmake

CMake Error at cmake/FindJsonCpp.cmake:44 (MESSAGE):
  Could not find JSONCpp library

I got the tip.tar.bz2 file, extracted it somewhere, read the README files
(no INSTALL file), but the instructions fail on linux 64bit.

After grepping the sources I finally did:

python scons.py platform=linux64-gcc libs

this results in a file

./buildscons/linux64-gcc-4.3.3/src/lib_json/libjson_linux64-gcc-4.3.3_libmt.so

There are no instructions to install this in any file, nor anything that even
hints me how it should be installed, or even can be installed at all.

How to install this?

the added FindJsonCpp.cmake fails for me because
${CMAKE_CXX_COMPILER} is equal to "/usr/bin/ccache"

You should use "${CMAKE_CXX_COMPILER} ${CMAKE_CXX_COMPILER_ARG1}" instead.

as is done in indra/cmake/00-Common.cmake line 98

/usr/src/secondlife/secondlife/snowglobe/snowglobe-svn/indra/newview/lltranslate.cpp:106: error: 'Json' has not been declared
/usr/src/secondlife/secondlife/snowglobe/snowglobe-svn/indra/newview/lltranslate.cpp:106: error: expected `;' before 'root'

etc.

Imho, the problem is that the headerfile is found, but never included.

The first can contain one or more strings -L/some/path/lib and then /some/path/lib should be
searched for the library, the second can contain one or more strings -I/some/path/include
and then /some/path/include should be used to search for the header.

I can't fix this myself, cause I don't know cmake :/

Same for include -I /usr/include is automatically searched by GCC.

Just check your cmake cache to make sure it found the locations

CMakeCache.txt:JSONCPP_INCLUDE_DIR:PATH=/usr/include
CMakeCache.txt:JSONCPP_LIBRARY:FILEPATH=/usr/lib/libjson_linux-gcc-4.4.1_libmt.so

lindenrobot added a comment - 26/Sep/09 01:07 PM
Revision 2794 by rob.linden on 2009-09-26 15:07:17 -0500 (Sat, 26 Sep 2009)

Fixup for SNOW-204 (setting JSONCPP_FIND_QUIETLY and JSONCPP_FIND_REQUIRED so that missing JsonCpp is reported)

Files affected:
U projects/2009/snowglobe/trunk/indra/cmake/JsonCpp.cmake

Revision 2795

SNOW-240: Use CMAKE_CXX_COMPILER_ARG1 when invoking compiler.

Files affected:
U projects/2009/snowglobe/trunk/indra/cmake/FindJsonCpp.cmake

Thanks