Data commit

Task/Conditional-structures/Make/conditional-structures-1.make

@@ -0,0 +1,12 @@
+# make -f do.mk C=mycond if
+C=0
+
+if:
+   -@expr $(C) >/dev/null && make -f do.mk true; exit 0
+   -@expr $(C) >/dev/null || make -f do.mk false; exit 0
+
+true:
+   @echo "was true."
+
+false:
+   @echo "was false."

Task/Conditional-structures/Make/conditional-structures-2.make

@@ -0,0 +1,5 @@
+make -f do.mk if C=0
+> was false.
+
+make -f do.mk if C=1
+> was true.

Task/Conditional-structures/Make/conditional-structures-3.make

@@ -0,0 +1,11 @@
+C=0
+
+if: true false
+
+true:
+   @expr $(C) >/dev/null && exit 0 || exit 1
+   @echo "was true."
+
+false:
+   @expr $(C) >/dev/null && exit 1 || exit 0
+   @echo "was false."

Task/Conditional-structures/Make/conditional-structures-4.make

@@ -0,0 +1,6 @@
+|make -f do.mk -s -k C=1
+was true.
+*** Error code 1
+|make -f do.mk -s -k C=0
+*** Error code 1
+was false.

Task/Conditional-structures/Make/conditional-structures-5.make

@@ -0,0 +1,11 @@
+A=
+B=
+
+ifeq "$(A)" "1"
+       B=true
+else
+       B=false
+endif
+
+do:
+       @echo $(A) ..  $(B)

Task/Conditional-structures/Make/conditional-structures-6.make

@@ -0,0 +1,4 @@
+|gmake -f if.mk A=1
+1 .. true
+|gmake -f if.mk A=0
+0 .. false