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| author | Daniel Dunbar <daniel@zuster.org> | 2010-01-18 06:48:33 +0000 |
|---|---|---|
| committer | Daniel Dunbar <daniel@zuster.org> | 2010-01-18 06:48:33 +0000 |
| commit | faf0150036689985ecea64e78f2637093857cd7b (patch) | |
| tree | c73207e736ba2d380094d9b6c51e921578d2d26e /make/util.mk | |
| parent | f5722759b8fd2ae65042fe6f87908e3569dbfdf0 (diff) | |
Simplify subdirectory makefiles, and be more robust by checking that they define the appropriate variables.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@93714 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'make/util.mk')
| -rw-r--r-- | make/util.mk | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/make/util.mk b/make/util.mk index 4f6579084..2ce9a46a2 100644 --- a/make/util.mk +++ b/make/util.mk @@ -3,6 +3,18 @@ ### # Utility functions +# Function: streq LHS RHS +# +# Return "true" if LHS == RHS, otherwise "". +# +# LHS == RHS <=> (LHS subst RHS is empty) and (RHS subst LHS is empty) +streq = $(if $(1),$(if $(subst $(1),,$(2))$(subst $(2),,$(1)),,true),$(if $(2),,true)) + +# Function: strneq LHS RHS +# +# Return "true" if LHS != RHS, otherwise "". +strneq = $(if $(call streq,$(1),$(2)),,true) + # Function: Set variable value # # Set the given make variable to the given value. |