From c42ab088191d5dd8a2d856dc96cb5b3f90687fc4 Mon Sep 17 00:00:00 2001
From: "Dmitrij D. Czarkoff" <czarkoff@gmail.com>
Date: Fri, 25 Dec 2015 17:52:01 +0100
Subject: Add verbose mode

If V variable is set to any value, commands will be echoed to standard output.
---
 Makefile  | 14 ++++++++------
 README.md |  5 +++++
 2 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/Makefile b/Makefile
index fb3d07e..6ffa5c5 100644
--- a/Makefile
+++ b/Makefile
@@ -5,6 +5,8 @@ BINPREFIX ?= $(PREFIX)/bin
 MANPREFIX ?= $(PREFIX)/share/man
 DATAPREFIX ?= $(PREFIX)/share
 
+V ?=
+
 CFLAGS ?= -W -Wall -Wpedantic
 CFLAGS += -std=gnu11 $(shell sdl2-config --cflags)
 LDFLAGS += $(shell sdl2-config --libs) -lfreeimage -lSDL2_ttf -lfontconfig -lpthread
@@ -22,26 +24,26 @@ CFLAGS += -DIMV_VERSION=\"$(VERSION)\"
 
 $(TARGET): $(OBJECTS)
 	@echo "LINKING $@"
-	@$(CC) -o $@ $^ $(LDLIBS) $(LDFLAGS)
+	$(V:%=@)$(CC) -o $@ $^ $(LDLIBS) $(LDFLAGS)
 
 debug: CFLAGS += -DDEBUG -g -pg
 debug: $(TARGET)
 
 $(BUILDDIR)/%.o: src/%.c
-	@mkdir -p $(BUILDDIR)
+	$(V:%=@)mkdir -p $(BUILDDIR)
 	@echo "COMPILING $@"
-	@$(CC) -c $(CFLAGS) -o $@ $<
+	$(V:%=@)$(CC) -c $(CFLAGS) -o $@ $<
 
 test_%: test/%.c src/%.c
 	@echo "BUILDING $@"
-	@$(CC) -o $@ -Isrc -W -Wall -std=gnu11 -lcmocka $^
+	$(V:%=@)$(CC) -o $@ -Isrc -W -Wall -std=gnu11 -lcmocka $^
 
 check: $(TESTS)
 	@echo "RUNNING TESTS"
-	@for t in "$(TESTS)"; do ./$$t; done
+	$(V:%=@)for t in "$(TESTS)"; do ./$$t; done
 
 clean:
-	@$(RM) $(TARGET) $(OBJECTS) $(TESTS)
+	$(V:%=@)$(RM) $(TARGET) $(OBJECTS) $(TESTS)
 
 install: $(TARGET)
 	install -D -m 0755 $(TARGET) $(DESTDIR)$(BINPREFIX)/imv
diff --git a/README.md b/README.md
index 5c9c87b..7ed1ff3 100644
--- a/README.md
+++ b/README.md
@@ -70,6 +70,11 @@ available.  Eg. to install `imv` to home directory, run:
 
     $ BINPREFIX=~/bin PREFIX=~/.local make install
 
+In case something goes wrong during installation process you may use verbose
+mode to inspect commands issued by make:
+
+    $ V=1 make
+
 Tests
 -----
 
-- 
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