[Boost-build] problem in prescribing the build flags for a special file

Subject: [Boost-build] problem in prescribing the build flags for a special file
From: rrossi_at_[hidden]
Date: 2011-02-22 17:45:26

Dear list, 

I am having troubles in fine controlling the compilation of
a file. I checked the FAQ but is still gives me problems... 

my directory
structure (simplified) 

is 

base_dir (Jamroot is here) 

|

|_dir1-Jamfile1 

| 

|_dir2_Jamfile2 

inside Jamroot I start with
something like 

using gcc : : /usr/bin/g++-4.5 ; 

using intel : : :
"-fPIC -ansi -funroll-loops -cxxlib-gcc -openmp -wd654 -wd10010" "-fPIC
-funroll-loops -cxxlib-gcc -openmp -wd654 -wd10010" ; 

using sun : : : "
-w -DBOOST_UBLAS_UNSUPPORTED_COMPILER=0" " -w
-DBOOST_UBLAS_UNSUPPORTED_COMPILER=0" " -w
-DBOOST_UBLAS_UNSUPPORTED_COMPILER=0" ; 

using clang : :
/home/riccardo/clang_svn/build/Release/bin/clang : " -fPIC -ansi
-funroll-loops -ffast-math -Wno-unknown-pragmas " " -fPIC -funroll-loops
-ffast-math " ; 

which configures the settings that I nornally like to use
for my compilation 

unfortunately inside "dir2" there is a "special_file"
which I need to compile with a very well defined set of options. 

If I
define 

obj : special_file.cpp : "whatever1" "list of ops" ; 

as
suggested in the FAQ the special flags are ADDED to the list of flags
already prescribed in the Jamroot. How can I SUBSTITUTE them? (namely i
would like to have exclusively "-O0 -g" 

the real code can be found online
here: 

http://kratos.cimne.upc.es/trac/browser/kratos 

(Common_Jamroot is
renamed as Jamroot) 

while the problematic Jamfile is:

http://kratos.cimne.upc.es/trac/browser/kratos/applications/MeshingApplication/custom_external_libraries/tetgen/tetgen1.4.0

Thank you for any hint 

Riccardo