Building sepdk kernel module fails when sh -> dash

[Nicolas_B_2]

Gentoo, kernel vanilla-sources-3.8.13, sh -> dash. When I run

/opt/intel/vtune_amplifier_xe/sepdk/src $ sudo ./build-driver

I get this error:

In file included from /opt/intel/vtune_amplifier_xe_2015.3.0.403110/sepdk/src/vtsspp/vtss_config.h:31:0,
                 from /opt/intel/vtune_amplifier_xe_2015.3.0.403110/sepdk/src/vtsspp/module.c:28:
/opt/intel/vtune_amplifier_xe_2015.3.0.403110/sepdk/src/vtsspp/vtss_autoconf.h:32:1: error: expected identifier or ‘(’ before ‘-’ token
 -n #define 
 ^
/opt/intel/vtune_amplifier_xe_2015.3.0.403110/sepdk/src/vtsspp/vtss_autoconf.h:32:4: error: stray ‘#’ in program
 -n #define 
    ^
/opt/intel/vtune_amplifier_xe_2015.3.0.403110/sepdk/src/vtsspp/vtss_autoconf.h:35:4: error: stray ‘#’ in program
 -n #define 
    ^

and many more. Upon inspecting vtss_config.h I find this:

    28	#ifndef CONFIG_RING_BUFFER
    29	#error "The kernel should be compiled with CONFIG_RING_BUFFER=y"
    30	#endif /* CONFIG_RING_BUFFER */
    31	
    32	-n #define 
    33	_N VTSS_AUTOCONF_CPUMASK_PARSELIST_USER
    34	 1
    35	-n #define 
    36	_N VTSS_AUTOCONF_DPATH_PATH

Upon switching sh -> bash, the build is fine. I don't quite understand at this point why this is happening. Line vtsspp/Makefile:180 seems fine even under dash.

nick