Running 'mach build' on SunOS 11.2, configure fails in the obj-i386-pc-solaris2.11/intl/icu/target directory, claiming the C compiler can't make executables, because cc is being invoked with what appears to be a MS compiler flag, '-MD'. Even thought I am running 'mach' with CC and SOLARIS_SUNPRO_CC set to 'cc', CXX and SOLARIS_SUNPRO_CXX set to 'CC' in the environment, this flag seems to be coming from RTL_FLAGS in config/config.mk; but by rights it shouldn't be happening because of the 'ifeq' around it.
Can anyone tell me how to fix this please?