switch to cmake

8 files changed, 138 insertions, 46 deletions

diff --git a/.gitignore b/.gitignore
index 6ec8668..740923b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,2 @@
-# C-Objects
-*.o
-
-# Binary
-lan7800-led-ctl
+# generated files during cmake build process
+/build/*
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..bba1a01
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,73 @@
+cmake_minimum_required(VERSION 3.16)
+
+set(CMAKE_DISABLE_SOURCE_CHANGES ON)
+set(CMAKE_DISABLE_IN_SOURCE_BUILD ON)
+
+# This needs to come before project() to skip the compiler config process
+if ("${CMAKE_BINARY_DIR}" STREQUAL "${CMAKE_SOURCE_DIR}")
+	message(FATAL_ERROR "In-source builds are disabled.
+Please create a subfolder and use `cmake ..` inside it.
+NOTE: cmake will now create CMakeCache.txt and CMakeFiles/*.
+You must delete them, or cmake will refuse to work.")
+endif() # yes, end-markers and even else() need empty parentheses
+
+project(lan7800-led-ctl LANGUAGES C)
+
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/cmake")
+
+set(CMAKE_INSTALL_PREFIX /usr)
+set(CMAKE_C_STANDARD 11)
+set(CMAKE_C_STANDARD_REQUIRED ON)
+
+set(CMAKE_VERBOSE_MAKEFILE ON)
+
+find_package(PkgConfig REQUIRED)
+
+pkg_check_modules(libusb REQUIRED libusb-1.0)
+
+set(HEADERS
+	include/lan7800-led-ctl.h
+)
+
+add_executable(${PROJECT_NAME}
+	${HEADERS}
+)
+
+target_include_directories(${PROJECT_NAME} PUBLIC
+	${CMAKE_BINARY_DIR}	# HB9HEI - location of generated version.h
+	${CMAKE_SOURCE_DIR}/include
+)
+
+target_link_libraries(${PROJECT_NAME} PRIVATE
+	usb-1.0
+)
+
+target_sources(${PROJECT_NAME} PRIVATE
+	src/lan7800-led-ctl.c
+)
+
+add_dependencies(${PROJECT_NAME}
+	git-version
+)
+
+target_compile_options(${PROJECT_NAME} PUBLIC
+	-g
+	-Os
+	-std=c11
+	-fstack-protector-strong
+	-Wall
+	-Wextra
+	-Werror
+	-Wstrict-prototypes
+	-Wconversion
+	-Wmissing-prototypes
+	-Wshadow
+	-Wunused
+)
+
+install(TARGETS ${PROJECT_NAME} DESTINATION bin)
+
+# HB9HEI - custom target that produces version.h	(req. cmake 3.0)
+add_custom_target(git-version ALL
+	${CMAKE_COMMAND} -P ${CMAKE_CURRENT_SOURCE_DIR}/cmake/gitversion.cmake
+)
diff --git a/Makefile b/Makefile
deleted file mode 100644
index aa2696c..0000000
--- a/Makefile
+++ /dev/null
@@ -1,37 +0,0 @@
-ECHO	= /bin/echo -e
-SHELL	= /bin/sh
-RM	= /bin/rm -f
-CC	= gcc
-STRIP	= strip
-
-GIT_VERSION := $(shell git --no-pager describe --tags --dirty |sed 's/\([^-]*-g\)/r\1/;s/-/./g')
-
-CFLAGS	= -g -Os -std=c11 -I./include -Wall -Wstrict-prototypes -Wconversion
-CFLAGS += -DVERSION=\"$(GIT_VERSION)\"
-CFLAGS	+= -Wmissing-prototypes -Wshadow -Wextra -Wunused
-LDFLAGS	= -lusb-1.0
-
-PROGS = lan7800-led-ctl
-
-all:	$(PROGS)
-
-clean:
-	$(RM) src/*.o
-tidy:
-	$(RM) src/*.o $(PROGS)
-
-install: $(PROGS)
-	@$(ECHO) "\t==> Installing programs to $(DESTDIR)/bin"
-	@install -m 0755 -d $(DESTDIR)/bin
-	@install -m 0755 -t $(DESTDIR)/bin $(PROGS)
-
-# Generic instructions
-src/%.o: src/%.c
-	@$(ECHO) "\t--> Compiling `basename $<`"
-	@$(CC) $(CFLAGS) -c $< -o $@
-
-# Specific programs
-lan7800-led-ctl:	src/lan7800-led-ctl.o
-	@$(ECHO) "\t==> Linking objects to output file $@ $(GIT_VERSION)\n"
-	@$(CC) $(CFLAGS) $(LDFLAGS) $+ -o $@
-	@$(STRIP) $@
diff --git a/README b/README
index 48a8b03..40d2658 100644
--- a/README
+++ b/README
@@ -10,4 +10,4 @@ These ethernet and USB controllers are used on embedded computers like
 Raspberry Pi 3B+.
 
 Further info can be found at:
-https://familie-radermacher.ch/dominic/computer/raspberry-pi/lan7800-led-ctl/
+https://dominic.familie-radermacher.ch/computer/raspberry-pi/lan7800-led-ctl/
diff --git a/cmake/gitversion.cmake b/cmake/gitversion.cmake
new file mode 100644
index 0000000..92483ea
--- /dev/null
+++ b/cmake/gitversion.cmake
@@ -0,0 +1,56 @@
+# HB9HEI - required for autogen version.h
+find_package(Git REQUIRED)
+
+# Get commit hash
+execute_process(COMMAND git log --format='%H' -n 1
+	OUTPUT_VARIABLE GIT_COMMIT_HASH
+	ERROR_QUIET)
+# Check whether we got any revision (which isn't always the case, e.g. when
+# someone downloaded a zip file instead of a checkout)
+if ("${GIT_COMMIT_HASH}" STREQUAL "")
+	set(GIT_BRANCH "N/A")
+	set(GIT_COMMITS "")
+	set(GIT_COMMIT_HASH "N/A")
+	set(GIT_COMMIT_SHORT "N/A")
+	set(GIT_DIFF "")
+	set(GIT_TAG "N/A")
+else()
+	execute_process(COMMAND
+		bash -c "git diff --quiet --exit-code || echo +"
+		OUTPUT_VARIABLE GIT_DIFF)
+	execute_process(COMMAND
+		bash -c "git describe --always --tags |cut -f1 -d'-'"
+		OUTPUT_VARIABLE GIT_TAG ERROR_QUIET)
+	execute_process(COMMAND
+		bash -c "git describe --always --tags |cut -f2 -d'-'"
+		OUTPUT_VARIABLE GIT_COMMITS ERROR_QUIET)
+	execute_process(COMMAND
+		git rev-parse --abbrev-ref HEAD
+		OUTPUT_VARIABLE GIT_BRANCH)
+	string(STRIP "${GIT_COMMIT_HASH}" GIT_COMMIT_HASH)
+	string(SUBSTRING "${GIT_COMMIT_HASH}" 1 7 GIT_COMMIT_SHORT)
+	string(STRIP "${GIT_BRANCH}" GIT_BRANCH)
+	string(STRIP "${GIT_COMMITS}" GIT_COMMITS)
+	string(STRIP "${GIT_DIFF}" GIT_DIFF)
+	string(STRIP "${GIT_TAG}" GIT_TAG)
+	if (${GIT_COMMITS} STREQUAL ${GIT_TAG})
+		set(GIT_COMMITS "0")
+	endif()
+endif()
+
+set(VERSION "#define GIT_BRANCH \"${GIT_BRANCH}\"
+#define GIT_COMMIT \"${GIT_COMMIT_SHORT}\"
+#define GIT_COMMITS \"${GIT_COMMITS}\"
+#define GIT_TAG \"${GIT_TAG}\"
+#define VERSION \"${GIT_TAG}.r${GIT_COMMITS}.g${GIT_COMMIT_SHORT}${GIT_DIFF}\"
+")
+
+message(DEBUG "Generated Version: \"${VERSION}\"")
+if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/version.h)
+	file(READ ${CMAKE_CURRENT_SOURCE_DIR}/version.h VERSION_)
+else()
+	set(VERSION_ "")
+endif()
+if (NOT "${VERSION}" STREQUAL "${VERSION_}")
+	file(WRITE "${CMAKE_CURRENT_SOURCE_DIR}/version.h" "${VERSION}")
+endif()
diff --git a/compile.sh b/compile.sh
new file mode 100755
index 0000000..96701ce
--- /dev/null
+++ b/compile.sh
@@ -0,0 +1,2 @@
+#!/bin/sh
+mkdir -p build && cmake --fresh -B build && cmake --build build
diff --git a/include/lan7800-led-ctl.h b/include/lan7800-led-ctl.h
index d8a57a4..f477562 100644
--- a/include/lan7800-led-ctl.h
+++ b/include/lan7800-led-ctl.h
@@ -1,7 +1,7 @@
 /*
 	lan7800-led-ctl - control LEDs of LAN7800 ethernet/usb controllers
 	
-	Copyright (C) 2018 Dominic Radermacher <dominic@familie-radermacher.ch>
+	Copyright (C) 2018-2024 Dominic Radermacher <dominic@familie-radermacher.ch>
 	
 	This program is free software; you can redistribute it and/or modify it
 	under the terms of the GNU General Public License version 3 as
diff --git a/src/lan7800-led-ctl.c b/src/lan7800-led-ctl.c
index 6934710..109bd3e 100644
--- a/src/lan7800-led-ctl.c
+++ b/src/lan7800-led-ctl.c
@@ -1,7 +1,7 @@
 /*
 	lan7800-led-ctl - control LEDs of LAN7800 ethernet/usb controllers
 	
-	Copyright (C) 2018 Dominic Radermacher <dominic@familie-radermacher.ch>
+	Copyright (C) 2018-2024 Dominic Radermacher <dominic@familie-radermacher.ch>
 	
 	This program is free software; you can redistribute it and/or modify it
 	under the terms of the GNU General Public License version 3 as
@@ -24,6 +24,7 @@
 #include <libusb-1.0/libusb.h>
 
 #include "lan7800-led-ctl.h"
+#include "version.h"		/* generated by cmake */
 
 /* global variables */
 int led_arr[3] = { MODE_KEEP, MODE_KEEP, MODE_KEEP };
@@ -100,7 +101,7 @@ void about(void)
 {
 	printf("lan7800-led-ctl %s programmed by Dominic Radermacher\n", VERSION);
 	printf("For further info or latest version see\n");
-	printf("https://familie-radermacher.ch/dominic/computer/raspberry-pi/lan7800-led-ctl/\n");
+	printf("https://dominic.familie-radermacher.ch/computer/raspberry-pi/lan7800-led-ctl/\n");
 	exit(1);
 }