[Buildroot] wrap Buildroot compilation for static analysis

[spam at douglasheld.net]

Hi list,

I have some commercial software called Fortify SCA that wraps a compiler
command, to build an analysis model of the code.  I would like to analyze
OpenWRT and I see that it implements Buildroot.

For each time the build system invokes a command like 'gcc <compiler
args>', I would like to capture this information and run a command
'sourceanalyzer <sca args> gcc <compiler args>'.

With makefiles, this is a pretty well solved problem; I can invoke
sourceanalyzer <sca args> make <make args>
and that makes some wrapper scripts for gcc, g++ etc. that invoke
sourceanalyzer correctly. But I am finding the Buildroot build sequence a
little incomprehensible.

For example, a shortcut I tried is:

#i.e., build the toolchain and then the product
make
# find and remove selected object files
find ./package/libnl-tiny | egrep '\.o$|\.so$' | xargs rm
# try my wrapper on limited number of files
sourceanalyzer <sca args> make

But the final command doesn't detect the missing .o files and rebuild
them.  Instead it indicates a fatal error in libnl-tiny.so not existing as
expected.

Any indication where I should be looking? I didn't imagine the OpenWRT guys
would be able to answer questions about the underlying build system.

Thanks
Doug



-- 
spam at douglasheld.net
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