diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2013-09-13 18:25:51 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2013-10-16 18:21:00 +0200 |
| commit | 837a2e267f9c01cd9204d5b701712d6d26a5220e (patch) | |
| tree | 02833701e040d146ba7503a512777142c3fae4d1 /rules.mak | |
| parent | 39c153b80f890dc5f02465dc59992e195abd5f40 (diff) | |
rules.mak: New logical functions for handling y/n values
Add new logical functions for handling y/n values like those we
use in CONFIG_FOO variables:
lnot : logical NOT
land : logical AND
lor : logical OR
lxor : logical XOR
leqv : logical equality, inverse of lxor
lif : like Make's $(if) but with an eq-like test
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')
| -rw-r--r-- | rules.mak | 17 |
1 files changed, 17 insertions, 0 deletions
@@ -89,6 +89,23 @@ find-in-path = $(if $(find-string /, $1), \ $(wildcard $1), \ $(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH))))) +# Logical functions (for operating on y/n values like CONFIG_FOO vars) +# Inputs to these must be either "y" (true) or "n" or "" (both false) +# Output is always either "y" or "n". +# Usage: $(call land,$(CONFIG_FOO),$(CONFIG_BAR)) +# Logical NOT +lnot = $(if $(subst n,,$1),n,y) +# Logical AND +land = $(if $(findstring yy,$1$2),y,n) +# Logical OR +lor = $(if $(findstring y,$1$2),y,n) +# Logical XOR (note that this is the inverse of leqv) +lxor = $(if $(filter $(call lnot,$1),$(call lnot,$2)),n,y) +# Logical equivalence (note that leqv "","n" is true) +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,$3) + # Generate files with tracetool TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py |