Modernize build

.gitignore

@@ -1,32 +1,22 @@
-# Ignore libtoolize artifacts
-ltmain.sh
-m4/
-
-# Ignore autoreconf artifacts
+/autom4te.cache
+/autoconf
 aclocal.m4
-autom4te.cache/
-configure
-Makefile.in
 
-# Ignore automake --add-missing artifacts
-ar-lib
-compile
-config.guess
-config.sub
-install-sh
-missing
-depcomp
+*.o
+*.lo
+*.a
+*.la
+.dirstamp
+*.pc
 
-# Ignore configure artifacts
-Makefile
+.deps
+.libs
+
+Makefile.in
+configure
 config.log
 config.status
 libtool
-.deps/
+Makefile
 
-# Ignore make artifacts
-*.o
-*.lo
-*.la
-.libs
-src/hqx
+/hqx

Makefile.am

@@ -1,3 +1,23 @@
-ACLOCAL_AMFLAGS = -I m4
+ACLOCAL_AMFLAGS = -I autoconf/m4
 
-SUBDIRS = src
+pkgconfigdir = ${libdir}/pkgconfig
+pkgconfig_DATA = hqx.pc
+
+EXTRA_DIST = README.md
+
+bin_PROGRAMS = hqx
+lib_LTLIBRARIES = libhqx.la
+
+libhqx_la_SOURCES = \
+  src/init.c \
+  src/hq2x.c \
+  src/hq3x.c \
+  src/hq4x.c \
+  src/common.h
+libhqx_la_LDFLAGS = -no-undefined -version-info @HQX_LTVERSION@
+
+include_HEADERS = src/hqx.h
+
+hqx_SOURCES = src/hqx.c
+hqx_CFLAGS = $(IL_CFLAGS) -I.
+hqx_LDADD = libhqx.la $(IL_LIBS)

README.md

@@ -9,7 +9,7 @@ hqx ("hq" stands for "high quality" and "x" stands for magnification) is one of
     autoreconf -vi
 
 # Install
-NOTE: DevIL library and development headers are required.
+NOTE: [DevIL](http://openil.sf.net/) library and development headers are required.
 
     ./configure
     make && make install

configure.ac

@@ -1,34 +1,29 @@
-AC_INIT([hqx], [1.0], [grom@zeminvaders.net])
-AC_CONFIG_MACRO_DIR([m4])
-AC_PROG_CC
+AC_INIT([hqx], [1.2], [https://github.com/grom358/hqx/issues],
+  [hqx], [https://github.com/grom358/hqx])
+AC_CONFIG_AUX_DIR([autoconf])
+AC_CONFIG_MACRO_DIR([autoconf/m4])
+AM_INIT_AUTOMAKE([1.11 foreign subdir-objects -Wall])
+AM_SILENT_RULES([yes])
+
 AC_LANG([C])
+AC_PROG_CPP
+AC_PROG_CC
+AM_PROG_AR
 AC_C_INLINE
 AC_C_BIGENDIAN
-AM_INIT_AUTOMAKE([-Wall -Werror])
-AM_PROG_CC_C_O
-AM_PROG_AR
 
-AC_CHECK_HEADER([IL/il.h],,AC_MSG_ERROR("DevIL il.h required"))
-
-AC_ARG_ENABLE([debug],
-	      [AS_HELP_STRING([--enable-debug], [Compile a debug version of the library])],
-          [CFLAGS="-Wall -g -O0"],
-	      [CFLAGS="-O3"])
-
-AC_LIBTOOL_WIN32_DLL
-AC_PROG_LIBTOOL
+LT_INIT([win32-dll])
 HQX_LTVERSION=1:0:0
 AC_SUBST([HQX_LTVERSION])
 
-dnl Win32
-AS_CASE([$host],
-        [*mingw32*], [PLATFORM="MINGW32"],
-        [*cygwin*], [PLATFORM="CYGWIN"],
-        [*darwin*], [PLATFORM="OSX"])
-AC_SUBST([PLATFORM])
+PKG_CHECK_MODULES([IL], [IL], ,
+  AC_MSG_ERROR([DevIL (http://openil.sf.net) is required.]))
 
-AM_CONDITIONAL([WINDOWS_BUILD],
-	       [test "x$PLATFORM" = "xMINGW32" -o "x$PLATFORM" = "xCYGWIN"])
+AC_ARG_ENABLE([debug],
+  AS_HELP_STRING([--enable-debug], [Compile a debug version of the library]))
+AS_IF([test "x$enable_debug" = "xyes"],
+  [CFLAGS="-Wall -g -O0"],
+  [CFLAGS="-O3"])
 
-AC_CONFIG_FILES([Makefile src/Makefile])
+AC_CONFIG_FILES([Makefile hqx.pc])
 AC_OUTPUT

hqx.pc.in

@@ -0,0 +1,12 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: @PACKAGE_TARNAME@
+Description: Fast, high-quality magnification filter designed for pixel art
+Version: @PACKAGE_VERSION@
+URL: @PACKAGE_URL@
+Requires.private: IL
+Cflags: -I${includedir}
+Libs: -L${libdir} -lhqx

src/hqx.c

@@ -19,7 +19,7 @@
 #include <unistd.h>
 #include <stdint.h>
 #include <stdlib.h>
-#include <hqx.h>
+#include "hqx.h"
 #include <IL/il.h>
 
 static inline uint32_t swapByteOrder(uint32_t ui)