# SHELL is the full path of sh.exe, unless
# 1) it is found in the current directory
# 2) it is not found at all
# 3) it is overridden on the command line with an existing file
# ... otherwise it is always sh.exe. Specifically, SHELL from the
# environment has no effect.
#
# This check will fail if SHELL is explicitly set to a not
# sh-compatible shell. This is not a problem, because configure.bat
# will not do that.
ifeq ($(SHELL), sh.exe)
    ifeq ($(wildcard ./sh.exe), )
        SH = 0
    else
        SH = 1
    endif
else
    SH = 1
endif

ifeq ($(SH), 1)
    RM_F = rm -f
    RM_RF = rm -rf
else
    RM_F = del /f
    RM_RF = rmdir /s /q
endif