From 717f8986cd49d896d1566e68973f6e261d40a29f Mon Sep 17 00:00:00 2001
From: Ansa89 <ansalonistefano@gmail.com>
Date: Mon, 23 Jun 2014 21:55:32 +0200
Subject: [PATCH] Makefile: checks for libs

---
 src/Makefile | 45 +++++++++++++++++++++++++++++----------------
 1 file changed, 29 insertions(+), 16 deletions(-)

diff --git a/src/Makefile b/src/Makefile
index f40799b..7a25215 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -1,30 +1,43 @@
-SUPPORT_AUDIO ?= 0
-
 LIBS = libtoxcore ncurses
 
 CFLAGS = -std=gnu99 -pthread
 LDFLAGS = -ldl -lresolv
-DESTDIR=/usr/local
+DESTDIR ?= /usr/local
 
 OBJ = chat.o chat_commands.o configdir.o dns.o execute.o
 OBJ += file_senders.o friendlist.o global_commands.o groupchat.o line_info.o
 OBJ += log.o misc_tools.o prompt.o settings.o toxic.o toxic_strings.o windows.o
 
-ifeq ($(SUPPORT_AUDIO), 1)
-CHECK_OPENAL = $(shell pkg-config openal || echo -n "no_audio")
-CHECK_TOXAV = $(shell pkg-config libtoxav || echo -n "no_audio")
-ifeq (no_audio, $(filter no_audio, $(CHECK_OPENAL) $(CHECK_TOXAV)))
-	SUPPORT_AUDIO = 0
+AUDIO_LIBS = libtoxav openal
+AUDIO_CFLAGS = -D_SUPPORT_AUDIO
+AUDIO_OBJ = device.o audio_call.o
+
+CHECK_AUDIO_LIBS = $(shell pkg-config $(AUDIO_LIBS) || echo -n "error")
+ifneq ($(CHECK_AUDIO_LIBS), error)
+        LIBS += $(AUDIO_LIBS)
+        CFLAGS += $(AUDIO_CFLAGS)
+        OBJ += $(AUDIO_OBJ)
 else
-	CFLAGS += -D_SUPPORT_AUDIO
-	OBJ += device.o audio_call.o
-	LIBS += openal libtoxav
+ifneq ($(MAKECMDGOALS), clean)
+MISSING_AUDIO_LIBS = $(shell for lib in $(AUDIO_LIBS) ; do if ! pkg-config $$lib ; then echo $$lib ; fi ; done)
+$(warning WARNING -- Toxic will be compiled without audio support)
+$(warning WARNING -- You need these libraries for audio support)
+$(warning WARNING -- $(MISSING_AUDIO_LIBS))
 endif
 endif
 
-ifneq ($(LIBS),)
-	CFLAGS += $(shell pkg-config --cflags $(LIBS))
-	LDFLAGS += $(shell pkg-config --libs $(LIBS))
+CHECK_LIBS = $(shell pkg-config $(LIBS) || echo -n "error")
+ifneq ($(CHECK_LIBS), error)
+        CFLAGS += $(shell pkg-config --cflags $(LIBS))
+        LDFLAGS += $(shell pkg-config --libs $(LIBS))
+else
+ifneq ($(MAKECMDGOALS), clean)
+MISSING_LIBS = $(shell for lib in $(LIBS) ; do if ! pkg-config $$lib ; then echo $$lib ; fi ; done)
+$(warning ERROR -- Cannot compile Toxic)
+$(warning ERROR -- You need these libraries)
+$(warning ERROR -- $(MISSING_LIBS))
+$(error ERROR)
+endif
 endif
 
 all: toxic
@@ -36,8 +49,6 @@ install: toxic
         mkdir -pv $(DESTDIR)/bin
         install -m 0755 toxic $(DESTDIR)/bin
 
--include $(OBJ:.o=.d)
-
 %.o: %.c
         $(CC) $(CFLAGS) -o $*.o -c $*.c
         $(CC) -MM $(CFLAGS) $*.c > $*.d
@@ -45,4 +56,6 @@ install: toxic
 clean:
         rm -rf *.d *.o toxic
 
+-include $(OBJ:.o=.d)
+
 .PHONY: clean all install