(OpenBSD) Using $< in a non-suffix rule context is a GNUmake idiom (Makefile:18)

[vl-ms]

This is the error message I get when using OpenBSD's make. Here's a tutorial on how to write a portable makefile that works with all versions of make: nullprogram.com/blog/2017/08/20/

[r1w1s1]

hey, not sure if this fixes it but can you try?

--- a/Makefile
+++ b/Makefile
@@ -12,7 +12,13 @@ CFLAGS += -Wold-style-definition
 CFLAGS += -Wpedantic
 CFLAGS += -Wshadow
 
+# OpenBSD ships X11 outside the default search paths
+UNAME := $(shell uname)
+ifeq ($(UNAME), OpenBSD)
+	CFLAGS  += -I/usr/X11R6/include
+	LDFLAGS += -L/usr/X11R6/lib
+endif
+
 all: xhidecursor
 
 xhidecursor: main.c Makefile
-	$(CC) $(CFLAGS) -o $@ $< -lX11 -lXfixes -lXi
+	$(CC) $(CFLAGS) -o $@ $< $(LDFLAGS) -lX11 -lXfixes -lXi

[astier]

This is certainly an important issue. Making my programs BSD compatible is on my mind for a long time now. I will take a look into it. Thanks for the help @r1w1s1