portable version of Makefile (tested with bsdmake and GNUmake)

qemu_mode/unsigaction/Makefile

@@ -1,2 +1,34 @@
-all:
-	@echo please use GNU make, thanks!
+#
+# american fuzzy lop++ - unsigaction
+# --------------------------------
+#
+# Written by Andrea Fioraldi <andreafioraldi@gmail.com>
+#
+# Copyright 2019-2020 Andrea Fioraldi. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+.POSIX:
+
+_UNIQ=_QINU_
+
+TARGETCANDIDATES=unsigaction32.so unsigaction64.so
+_TARGETS=$(_UNIQ)$(AFL_NO_X86)$(_UNIQ)
+__TARGETS=$(_TARGETS:$(_UNIQ)1$(_UNIQ)=)
+TARGETS=$(__TARGETS:$(_UNIQ)$(_UNIQ)=$(TARGETCANDIDATES))
+
+all:  $(TARGETS)
+	@if [ "$(AFL_NO_X86)" != "" ]; then echo "[!] Note: skipping compilation of unsigaction (AFL_NO_X86 set)."; fi
+
+unsigaction32.so:
+	@$(CC) -m32 -fPIC -shared unsigaction.c -o unsigaction32.so 2>/dev/null ; if [ "$$?" = "0" ]; then echo "unsigaction32 build success"; else echo "unsigaction32 build failure (that's fine)"; fi
+
+unsigaction64.so:
+	$(CC) -m64 -fPIC -shared unsigaction.c -o unsigaction64.so
+
+clean:
+	rm -f unsigaction32.so unsigaction64.so