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-rw-r--r--tools/build/make_check/Makefile11
1 files changed, 11 insertions, 0 deletions
diff --git a/tools/build/make_check/Makefile b/tools/build/make_check/Makefile
index bf26b44..e7bede7 100644
--- a/tools/build/make_check/Makefile
+++ b/tools/build/make_check/Makefile
@@ -44,6 +44,9 @@ all:
@echo "Running test arith_expr"
@${MAKE} arith_expr || ${MAKE} failure
@echo "PASS: Test arith_expr detected no regression."
+ @echo "Running test PATH_exists"
+ @${MAKE} PATH_exists || ${MAKE} failure
+ @echo "PASS: Test PATH_exists detected no regression."
.if make(double)
# Doubly-defined targets. make(1) will warn, but use the "right" one. If it
@@ -102,6 +105,14 @@ VALUE= 0
.endif
.endif
+.if make(PATH_exists)
+PATH_exists:
+.PATH: ${.CURDIR}
+.if !exists(${.CURDIR}/) || !exists(${.CURDIR}/.) || !exists(${.CURDIR}/..)
+.error exists() failed
+.endif
+.endif
+
failure:
@echo "FAIL: Test failed: regression detected. See above."
@false
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