path: root/rules.mak
diff options
authorPeter Maydell <peter.maydell@linaro.org>2013-09-13 18:25:52 +0100
committerPaolo Bonzini <pbonzini@redhat.com>2013-10-16 18:21:00 +0200
commit9ef622e31e7168a9a2c80f95d245c2ad156e3fa7 (patch)
tree0c511c47b0f3eafdcb297b829e34ebe708cb21dd /rules.mak
parent837a2e267f9c01cd9204d5b701712d6d26a5220e (diff)
rules.mak: New string testing functions
Add new string testing functions which return a y/n result: eq : are two strings equal (ignoring leading/trailing space)? ne : are two strings unequal? isempty : is a string empty? notempty : is a string non-empty? Based on an idea by Ákos Kovács <akoskovacs@gmx.com>. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'rules.mak')
1 files changed, 11 insertions, 0 deletions
diff --git a/rules.mak b/rules.mak
index 65a1b9695b..49edb9bf07 100644
--- a/rules.mak
+++ b/rules.mak
@@ -106,6 +106,17 @@ leqv = $(if $(filter $(call lnot,$1),$(call lnot,$2)),y,n)
# Logical if: like make's $(if) but with an leqv-like test
lif = $(if $(subst n,,$1),$2,$3)
+# String testing functions: inputs to these can be any string;
+# the output is always either "y" or "n". Leading and trailing whitespace
+# is ignored when comparing strings.
+# String equality
+eq = $(if $(subst $2,,$1)$(subst $1,,$2),n,y)
+# String inequality
+ne = $(if $(subst $2,,$1)$(subst $1,,$2),y,n)
+# Emptiness/non-emptiness tests:
+isempty = $(if $1,n,y)
+notempty = $(if $1,y,n)
# Generate files with tracetool
TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py