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Make:Diagnostic fail if no eval

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To help diagnose make problems, we report an error if the make
program used does not provide the $(eval ) make functionality.
This will detect early versions of GNU make and other make programs.

Change-Id: I0ebb0f63694cf0b04eaeb7ea1e9e172fb9770ce0
This commit is contained in:
Evan Lloyd 2015-12-02 18:41:22 +00:00
parent f1477d4ad8
commit 1670d9df4d
1 changed files with 6 additions and 0 deletions
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6
make_helpers/build_macros.mk
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@ -28,6 +28,12 @@
# POSSIBILITY OF SUCH DAMAGE.
#
# Report an error if the eval make function is not available.
$(eval eval_available := T)
ifneq (${eval_available},T)
$(error This makefile only works with a Make program that supports $$(eval))
endif
# Some utility macros for manipulating awkward (whitespace) characters.
blank :=
space :=${blank} ${blank}