[PATCH v2] build: add support for ncurses[w][5,6]

[Nikola Pajkovsky]

now iptraf-ng is able to build against any ncurses library.
By default, iptraf-ng is built with ncurses5 lib. If you want to override
it, use of the commands:

$ make NEEDS_NCURSESW5=YesPlease
$ make NEEDS_NCURSES6=YesPlease
$ make NEEDS_NCURSESW6=YesPlease

or define it in Makefile

---
I'm really not happy with that autodetection.

Signed-off-by: Nikola Pajkovsky <npajkovs(a)redhat.com&gt;
---
 Makefile |   90 +++++++++++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 75 insertions(+), 15 deletions(-)

diff --git a/Makefile b/Makefile
index dd5aed2..b014f89 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,16 @@ all::
 
 # Define V=1 to have a more verbose compile.
 #
-# Define NO_NCURSES if not linking with ncurses.
+# Define NO_PANEL if you don't want to use -lpanel.
+#
+# Define NEEDS_NCURSES5 if you need linking with ncurses5.
+#
+# Define NEEDS_NCURSESW5 if you need linking with ncursesw5.
+#
+# Define NEEDS_NCURSES6 if you need linking with ncurses6.
+#
+# Define NEEDS_NCURSESW6 if you need linking with ncursesw6.
+
 
 VERSION-FILE: FORCE
 	@$(SHELL_PATH) ./GEN-VERSION-FILE
@@ -196,26 +205,77 @@ $(error please set COMPUTE_HEADER_DEPENDENCIES to yes, no, or auto
\
 endif
 endif
 
-ifndef NO_NCURSES
-NCURSES6_CFLAGS := $(shell ncurses6-config --cflags 2>/dev/null)
-ifneq ($(NCURSES6_CFLAGS),)
-NCURSES_CFLAGS += $(NCURSES6_CFLAGS)
+ifndef NCURSES_LDFLAGS
+ifdef NEEDS_NCURSES5
+	NCURSES_CFLAGS := $(shell ncurses5-config --cflags 2>/dev/null)
+	NCURSES_LDFLAGS := $(shell ncurses5-config --libs 2>/dev/null)
+	ifndef NO_PANEL
+		NCURSES_LDFLAGS += -lpanel
+	endif
+endif
+endif
+
+ifndef NCURSES_LDFLAGS
+ifdef NEEDS_NCURSESW5
+	NCURSES_CFLAGS := $(shell ncursesw5-config --cflags 2>/dev/null)
+	NCURSES_LDFLAGS := $(shell ncursesw5-config --libs 2>/dev/null)
+	ifndef NO_PANEL
+		NCURSES_LDFLAGS += -lpanel
+	endif
+endif
+endif
+
+ifndef NCURSES_LDFLAGS
+ifdef NEEDS_NCURSES6
+	NCURSES_CFLAGS := $(shell ncurses6-config --cflags 2>/dev/null)
+	NCURSES_LDFLAGS := $(shell ncurses6-config --libs 2>/dev/null)
+	ifndef NO_PANEL
+		NCURSES_LDFLAGS += -lpanel
+	endif
 endif
-NCURSES6_LDFLAGS := $(shell ncurses6-config --libs 2>/dev/null)
-ifneq ($(NCURSES6_LDFLAGS),)
-NCURSES_LDFLAGS += $(NCURSES6_LDFLAGS)
 endif
 
-NCURSES5_CFLAGS := $(shell ncurses5-config --cflags 2>/dev/null)
-ifneq ($(NCURSES5_CFLAGS),)
-NCURSES_CFLAGS += $(NCURSES5_CFLAGS)
+ifndef NCURSES_LDFLAGS
+ifdef NEEDS_NCURSESW6
+	NCURSES_CFLAGS := $(shell ncursesw6-config --cflags 2>/dev/null)
+	NCURSES_LDFLAGS := $(shell ncursesw6-config --libs 2>/dev/null)
+	ifndef NO_PANEL
+		NCURSES_LDFLAGS += -lpanel
+	endif
 endif
-NCURSES5_LDFLAGS := $(shell ncurses5-config --libs 2>/dev/null)
-ifneq ($(NCURSES5_LDFLAGS),)
-NCURSES_LDFLAGS += $(NCURSES5_LDFLAGS)
 endif
 
-NCURSES_LDFLAGS += -lpanel
+# try find ncuses by autodetect
+ifndef NCURSES_LDFLAGS
+	TRY_NCURSES := $(shell ncurses5-config --libs 2>/dev/null)
+	ifneq ($(TRY_NCURSES),)
+		NCURSES_CFLAGS := $(shell ncurses5-config --cflags 2>/dev/null)
+		NCURSES_LDFLAGS := $(shell ncurses5-config --libs 2>/dev/null)
+	else
+		TRY_NCURSES := $(shell ncursesw5-config --libs 2>/dev/null)
+		ifneq ($(TRY_NCURSES),)
+			NCURSES_CFLAGS := $(shell ncursesw5-config --cflags 2>/dev/null)
+			NCURSES_LDFLAGS := $(shell ncursesw5-config --libs 2>/dev/null)
+		else
+			TRY_NCURSES := $(shell ncurses6-config --libs 2>/dev/null)
+			ifneq ($(TRY_NCURSES),)
+				NCURSES_CFLAGS := $(shell ncurses6-config --cflags 2>/dev/null)
+				NCURSES_LDFLAGS := $(shell ncurses6-config --libs 2>/dev/null)
+			else
+				TRY_NCURSES := $(shell ncursesw6-config --libs 2>/dev/null)
+				ifneq ($(TRY_NCURSES),)
+					NCURSES_CFLAGS := $(shell ncursesw6-config --cflags 2>/dev/null)
+					NCURSES_LDFLAGS := $(shell ncursesw6-config --libs 2>/dev/null)
+				endif
+			endif
+		endif
+	endif
+
+	ifneq ($(TRY_NCURSES),)
+	ifndef NO_PANEL
+		NCURSES_LDFLAGS += -lpanel
+	endif
+	endif
 endif
 
 QUIET_SUBDIR0  = +$(MAKE) -C # space to separate -C and subdir
-- 
1.7.10