@@ -1,30 +1,28 @@
---- kcore/def.h.m → <k/def.h>
---- ~ lexi hale <lexi@hale.su>
---- this file gathers information on the environment it's
---- being compiled in, setting macros that other headers
---- need. it will be emitted as <k/def.h>.
---- vim: ft=c
+dnl kcore/def.h.m → <k/def.h>
+dnl ~ lexi hale <lexi@hale.su>
+dnl this file gathers information on the environment it's
+dnl being compiled in, setting macros that other headers
+dnl need. it will be emitted as <k/def.h>.
+dnl vim: ft=c
 #ifndef KIdef
 #define KIdef
+define(`def',`#define $1 $2')
+
+ifdef(`atom_target_bits',`
+	define(`target',`atom_target_arch.atom_target_os.atom_target_bits')
+	def(KVbits,atom_target_bits)',`
+	define(`target',atom_target_arch.atom_target_os)')
+
+def(KVtarget,target)
+def(KVos,atom_target_os)
+def(KVarch,atom_target_arch)
 
-[ifdef atom_target_bits]
-	[define target: [atom_target_arch].[atom_target_os].[atom_target_bits]]
-	#define KVbits [atom_target_bits]
-[else]
-	[define target: [atom_target_arch].[atom_target_os]]
-[endif]
-#define KVtarget [target]
-#define KVos [atom_target_os]
-#define KVarch [atom_target_arch]
-[if [target_unix] == yes]
-	#define KFenv_unix
-	#define KFenv_posix
-[else]
-	[if [target_posix] == yes]
-		#define KFenv_posix
-	[endif]
-[endif]
+ifelse(target_unix,`yes',
+		`def(`KFenv_unix',)
+		def(`KFenv_posix',)',`
+		ifelse(target_posix,`yes',
+			`def(KFenv_posix)')')
 
 #define Kpragma(p) _Pragma(#p)
 #if defined(__GNUC__) || defined(__clang__)
 #   define Kerror(msg) Kpragma(GCC error #msg)