The following code in Sanity.gmk checks to make sure the Mozilla
libs dir exists and contains the XPCOM library.

@#
@# MOZILLA_LIBS_PATH must be valid....
@#
@if [ ! -r $(subst \,/,$(MOZILLA_LIBS_PATH))/mozilla_libs_ns610/$(LIB_PREFIX)xpcom.$(LIB_SUFFIX) ]; then $(ECHO) "ERROR: You do not have access to a valid Mozilla library set. \n" " Please check your access to \n" " $(subst \,/,$(MOZILLA_LIBS_PATH))/mozilla_libs_ns610/$(LIB_PREFIX)xpcom.$(LIB_SUFFIX) \n" " and/or check your value of ALT_MOZILLA_PATH, ALT_MOZILLA_LIBS_PATH, \n" " and on Windows, ALT_MOZILLA_DRIVE. \n" "" >> $(ERROR_FILE) ; fi


This code only applies to Solaris. For linux, this code does not apply
as we do not need to statically link against libxpcom.so.