> http://gcc.gnu.org/onlinedocs/gcc-4.2.2/gcc/Directory-Options.html#Directory-Options > http://gcc.gnu.org/onlinedocs/gcc-4.2.2/gcc/Link-Options.html#Link-Options These two you will need. > Please help me, I am very, very desperate. Why is the syntax wrong? > Why do I get this error? You get the error because the file cannot be found :) But that's stating the obvious. > mingw32-make all > 'Building target: BoostTest.exe' > 'Invoking: MinGW C++ Linker' > g++ > -Le:\BoostCPlusLibraries\bin\boost_1_34_1\bin.v2\libs\filesystem\build\gcc-mingw-3.4.5\debug\-lboost_filesystem-mgw34-d-1_34_1 > -Wl,--out-implib=boost -o"BoostTest.exe" ./main.o > -le:\BoostCPlusLibraries\boost_1_34_1\bin.v2\libs\filesystem\build\gcc-mingw-3.4.5\debug\boost_filesystem-mgw34-d-1_34_1.a > e:\mingw\bin\..\lib\gcc\mingw32\3.4.5\..\..\..\..\mingw32\bin\ld.exe: > cannot find > -le:\BoostCPlusLibraries\boost_1_34_1\bin.v2\libs\filesystem\build\gcc-mingw-3.4.5\debug\boost_filesystem-mgw34-d-1_34_1.a > collect2: ld returned 1 exit status > mingw32-make: *** [BoostTest.exe] Error 1 I assume this is your build script and you can change this. >From the linker options described in the documentation above, the -l option (lower case L) essentially tells the linker to look for libname.a where name comes after -l (eg. -lname). I assume you're familiar with .a files and any linking order requirements (some information is posted in the docs but you can search). The option -L lets you specify directories in which the libname.a is searched for without having to provide a full path to each object file. Your directory name is rather difficult but I assume "-lboost_filesystem-mgw34-d-1_34_1" at the end of the -L option is actually your library name? In that case, you need to leave it out of the -L option and only provide a directory (eg. -Le:\BoostCPlusLibraries\bin\boost_1_34_1\bin.v2\libs\filesystem\build\gcc-mingw-3.4.5\debug). Then, with the proper -L option, you can use -l to specify an archive (.a) file and it should be found in the -L directory (searched other places as well). So that option would be (I think for you) -llboost_filesystem-mgw34-d-1_34_1 . I'm pretty sure the full filename is libboost_filesystem-mgw34-d-1_34_1.a even though you don't use that in your command so that will probably work. corey
