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authorEelco Dolstra <eelco.dolstra@logicblox.com>2014-02-14T19·12+0100
committerEelco Dolstra <eelco.dolstra@logicblox.com>2014-02-14T19·12+0100
commit581a160c11dd3de66d9cd1a6e01c0641909546ef (patch)
treef07060bb31b062c08a22206717939684a7d27f45
parenta35c6eb4a2209716fe1d40cebad2b3adb5d05e0f (diff)
Add a function for looking up programs in $PATH
-rw-r--r--functions.mk4
1 files changed, 4 insertions, 0 deletions
diff --git a/functions.mk b/functions.mk
index 51f6457016e7..1287e4321ea3 100644
--- a/functions.mk
+++ b/functions.mk
@@ -5,3 +5,7 @@ rwildcard=$(foreach d,$(wildcard $1*),$(call rwildcard,$d/,$2) $(filter $(subst
 # Given a file name, produce the corresponding dependency file
 # (e.g. ‘foo/bar.o’ becomes ‘foo/.bar.o.dep’).
 filename-to-dep = $(dir $1).$(notdir $1).dep
+
+# Return the full path to a program by looking it up in $PATH, or the
+# empty string if not found.
+find-program = $(shell for i in $$(IFS=: ; echo $$PATH); do p=$$i/$(strip $1); if [ -e $$p ]; then echo $$p; break; fi; done)