ifeq ($(shell if test -d $(SRC_DIR)/../.git; then echo 1; fi), 1)
# Find the revision like: gXXXXM-branch
REV := g$(shell if head=`LC_ALL=C git rev-parse --verify HEAD 2>/dev/null`; then echo "$$head" | cut -c1-8; fi)$(shell if git diff-index HEAD | read dummy; then echo M; fi)$(shell git branch|grep '[*]' | sed 's/\* /-/;s/^-master$$//')
REV := g$(shell if head=`LC_ALL=C git rev-parse --verify HEAD 2>/dev/null`; then echo "$$head" | cut -c1-8; fi)$(shell if cd "$(SRC_DIR)/.." && git diff-index HEAD src | read dummy; then echo M; fi)$(shell git branch|grep '[*]' | sed 's/\* /-/;s/^-master$$//')
ifeq ($(shell if test -d $(SRC_DIR)/../.hg; then echo 1; fi), 1)
# Find the revision like: hXXXXM-branch
REV := h$(shell if head=`LC_ALL=C hg tip 2>/dev/null`; then echo "$$head" | head -n 1 | cut -c19-26; fi)$(shell if hg status $(SRC_DIR) | grep -v '^?' | read dummy; then echo M; fi)$(shell hg branch | sed 's/^/-/;s/^-default$$//')