[Scons-users] How to force flags order when linking static libraries

[Dirk Bächle]

Hi Davide,

On 11.03.2014 17:10, Davide Coppola wrote:

> Hi,

>

> I'm trying to build a program which is linked against a static library 

> (SDL2) built with Scons as well.

> The problem is that the final linking phase fails because of the order 

> of the flags.

>

> [...]

>

> The SConsript to build the program is called by the following command:

>

> SConscript('src/game/SConscript', exports = 'env', variant_dir = 

> 'build/' + env['mode'], src_dir = 'src', duplicate = 0)

>

> and it looks like this:

>

> Import('env')

>

> sources = Split(""" tmp_src/main.cpp """)

>

> env.Append(CPPPATH=['#/src/libs/SDL2/include'])

>

> env.Append(CCFLAGS = ['-D_REENTRANT'])

> env.Append(LINKFLAGS=['-lSDL2', '-lpthread', '-Wl,--no-undefined', 

> '-lm', '-ldl', '-lts', '-lpthread', '-lrt'])

>

> env.Program('#/bin/%s/game/bof' % env['mode'], sources, LIBS = 

> ['SDL2'], LIBPATH = ['../libs/SDL2'] )

>

>

> Any suggestion?

>


yes, you should use LINKFLAGS for specifying linker flags only, like the 
"-Wl,--no-undefined". For the actual libraries there is the LIBS 
variable instead. Its values get appended to the compiler command after 
your object file, so this should solve your problem:

env.Append(LINKFLAGS=['-Wl,--no-undefined'])
env.Append(LIBS=['SDL2', 'pthread', 'm', 'dl', 'ts', 'pthread', 'rt'])

.

Best regards,

Dirk