Update autotools build system

Make genmodules create a simpler Makefile.am:
Instead of generating separate rules for modules and implementations, just create rules for modules and lua libraries
Disable selection of non-lua libraries, they will now be built when needed.
Also disable selection of implementations, because that was useless anyway.

Note: inter-module dependencies aren't dealt with (yet).

--HG--
branch : minor

platform/unix/configure.ac

@@ -52,35 +52,61 @@ AC_ARG_WITH([luaversion], [AS_HELP_STRING([--with-luaversion], [Select the lua v
 with_clean_luaversion=`printf ${with_luaversion} | sed 's/\.//g'`
 
 # Generated sources for enabling/disabling modules
-m4_include([configure-modules.ac])
+m4_include([configure-modules-pre.ac])
 
 # Other features that can be enabled/disabled
 AC_ARG_ENABLE([mpg123], AC_HELP_STRING([--disable-mpg123], [Disable mp3 support, for patent-free builds]), [], [enable_mpg123=yes])
 AC_ARG_ENABLE([gme], AC_HELP_STRING([--enable-gme], [Enable GME support, for more chiptuney goodness]), [], [enable_gme=no])
 
+# Dependencies we always use
 ACLOVE_DEP_LUA
 ACLOVE_DEP_SDL2
 ACLOVE_DEP_LIBM
 ACLOVE_DEP_ZLIB
 
-AS_VAR_IF([enable_audio_openal], [true], [ACLOVE_DEP_OPENAL], [])
-AS_VAR_IF([enable_filesystem_physfs], [true], [ACLOVE_DEP_PHYSFS], [])
-AS_VAR_IF([enable_font_freetype], [true], [ACLOVE_DEP_FREETYPE2], [])
-AS_VAR_IF([enable_sound_lullaby], [true], [
+# Conditional dependencies
+AS_VAR_IF([enable_module_audio], [yes], [ACLOVE_DEP_OPENAL], [])
+AS_VAR_IF([enable_module_filesystem], [yes], [ACLOVE_DEP_PHYSFS], [])
+AS_VAR_IF([enable_module_font], [yes], [ACLOVE_DEP_FREETYPE2], [])
+AS_VAR_IF([enable_module_sound], [yes], [
 	ACLOVE_DEP_LIBMODPLUG
 	ACLOVE_DEP_VORBISFILE
 ], [enable_mpg123=no])
-AS_VAR_IF([enable_video_theora], [true], [ACLOVE_DEP_THEORA], [])
+AS_VAR_IF([enable_module_video], [yes], [ACLOVE_DEP_THEORA], [])
 AS_VAR_IF([enable_gme], [yes], [ACLOVE_DEP_GME], [])
 AS_VAR_IF([enable_mpg123], [no],
 	  AC_DEFINE([LOVE_NOMPG123], [], [Build without mpg123]),
 	  [ACLOVE_DEP_MPG123])
 
-# GME, treated seperately because it can be enabled (default off)
+# Add flags for optional libraries
+AC_ARG_ENABLE([library-enet], [  --disable-library-enet    Turn off library enet], [], [enable_library_enet=yes])
+AC_ARG_ENABLE([library-luasocket], [  --disable-library-luasocket    Turn off library luasocket], [], [enable_library_luasocket=yes])
+AC_ARG_ENABLE([library-luautf8], [  --disable-library-luautf8    Turn off library luautf8], [], [enable_library_luautf8=yes])
+
+# Select the libraries we need to build, based on the selected modules
+AS_VAR_IF([enable_module_physics], [yes], [enable_library_Box2D=yes], [enable_library_Box2D=no])
+AS_VAR_IF([enable_module_image], [yes], [enable_library_ddsparse=yes], [enable_library_ddsparse=no])
+AS_VAR_IF([enable_module_graphics], [yes], [enable_library_glad=yes], [enable_library_glad=no])
+AS_VAR_IF([enable_module_graphics], [yes], [enable_library_glslang=yes], [enable_library_glslang=no])
+AS_VAR_IF([enable_module_image], [yes], [enable_library_lodepng=yes], [enable_library_lodepng=no])
+AS_VAR_IF([enable_module_math], [yes], [enable_library_lz4=yes], [enable_library_lz4=no])
+AS_VAR_IF([enable_module_math], [yes], [enable_library_noise1234=yes], [enable_library_noise1234=no])
+AS_VAR_IF([enable_module_image], [yes], [enable_library_stb=yes], [enable_library_stb=no])
+AS_VAR_IF([enable_module_image], [yes], [enable_library_tinyexr=yes], [enable_library_tinyexr=no])
+AS_VAR_IF([enable_module_sound], [yes], [enable_library_Wuff=yes], [enable_library_Wuff=no])
+AS_VAR_IF([enable_module_graphics], [yes], [enable_library_xxHash=yes], [enable_library_xxHash=no])
+
+# Utf8 is required by both graphics and font, so enable if either is enabled
+enable_library_utf8=no
+AS_VAR_IF([enable_module_graphics], [yes], [enable_library_utf8=yes], [])
+AS_VAR_IF([enable_module_font], [yes], [enable_library_utf8=yes], [])
 
 # libenet check for socklen_t
 ACLOVE_SOCKLEN_T
 
+# Generated sources for enabling/disabling modules
+m4_include([configure-modules-post.ac])
+
 # Optionally build the executable (default on)
 AC_ARG_ENABLE([exe],
 			  AC_HELP_STRING([--disable-exe], [Disable building of executable launcher]), [], [enable_exe=yes])

platform/unix/genmodules

@@ -3,20 +3,15 @@
 love_suffix="$1"
 love_amsuffix="$(echo "$love_suffix" | sed 's/\-/_/g' | sed 's/\./_/g')"
 
-flags=""
+flags=()
 upper()
 {
 	echo "$@" | tr '[:lower:]' '[:upper:]'
 }
 
-implfind()
-{
-	find "$1" -maxdepth 1 -type d -exec basename '{}' \; | grep -v "^\." | tail -n +2
-}
-
 sourcefind()
 {
-	find "$1" $2 -type f \( -iname "*.c" -o -iname "*.cpp" -o -iname "*.h" -o -iname "*.hpp" -o -iname "*.lch" -o -iname "*.lua" \) | awk "{print \"./$prefix\"\$0\" \\\\\"}" | grep -v -f"$LOVEROOT/platform/unix/exclude"
+	find "$1" $2 -type f \( -iname "*.c" -o -iname "*.cpp" -o -iname "*.h" -o -iname "*.hpp" -o -iname "*.lch" -o -iname "*.lua" \) | awk "{print \"./$prefix\"\$0\" \\\\\"}" | grep -v -f"$LOVEROOT/platform/unix/exclude" | sort
 }
 
 handlemodule()
@@ -26,21 +21,6 @@ handlemodule()
 	printf "$DEFINENAME"
 }
 
-handleimpl()
-{
-	module="$1"
-	implementation="$2"
-	name="$3"
-
-	printf "if $name\n"
-	FILES="$(sourcefind "$module/$implementation" | sed "s/^/    /")"
-	if [[ "x$FILES" != "x" ]]; then
-		printf "liblove${love_amsuffix}_la_SOURCES += \\\\\n"
-		printf "${FILES:0:${#FILES}-2}\n"
-	fi
-	printf "endif\n\n"
-}
-
 genmodules()
 {
 	LOVEROOT="$(pwd)"
@@ -51,57 +31,80 @@ genmodules()
 	FILES="$(sourcefind "scripts" | sed "s/^/    /")"
 	printf "${FILES:0:${#FILES}-2}\n\n"
 
+	local -a modulelist=()
+	local -a liblist=()
+
 	cd modules
 	prefix="modules/"
 	for module in *; do
-		NAME=$(handlemodule "$module")
-		flags="$flags module-$module"
+		flags+=("module-$module")
 
-		printf "if $NAME\n"
-
-		for implementation in $(implfind "$module"); do
-			flags="$flags implementation-$module-$implementation"
-			handleimpl "$module" "$implementation" "LOVE_IMPLEMENTATION_$(upper "$module")_$(upper "$implementation")"
-		done
-
-		FILES="$(sourcefind "$module" "-maxdepth 1" | sed "s/^/    /")"
+		FILES="$(sourcefind "$module" | sed "s/^/    /")"
 		if [[ "x$FILES" != "x" ]]; then
-			printf "liblove${love_amsuffix}_la_SOURCES += \\\\\n"
-			printf "${FILES:0:${#FILES}-2}\n"
+			printf "liblove_module_$module = \\\\\n"
+			printf "${FILES:0:${#FILES}-2}\n\n"
+			modulelist+=("$module")
 		fi
 
-		printf "endif\n\n"
+		if [[ "$module" = "sound" ]]; then
+			printf "if !LOVE_NOMPG123\n"
+			printf "liblove_module_$module += \\\\\n"
+			printf "\t./modules/sound/lullaby/Mpg123Decoder.cpp \\\\\n"
+			printf "\t./modules/sound/lullaby/Mpg123Decoder.h\n"
+			printf "endif\n\n"
+		fi
 	done
 
 	cd ../libraries
 	prefix="libraries/"
 	for library in *; do
-		NAME="LOVE_LIBRARY_$(upper "$library")"
-		flags="$flags library-$library"
+		flags+=("library-$library")
 		FILES="$(sourcefind "$library" | sed "s/^/    /")"
 
 		if [[ ${#FILES} -gt 2 ]]; then
-			printf "if $NAME\n"
-			printf "liblove${love_amsuffix}_la_SOURCES += \\\\\n"
-			printf "${FILES:0:${#FILES}-2}\nendif\n\n"
+			printf "liblove_library_$library = \\\\\n"
+			printf "${FILES:0:${#FILES}-2}\n\n"
+			liblist+=("$library")
 		fi
 	done
+
+	for module in "${modulelist[@]}"; do
+		NAME=$(handlemodule "$module")
+		printf "if $NAME\n"
+		printf "liblove${love_amsuffix}_la_SOURCES += \$(liblove_module_$module)\n"
+		printf "endif\n\n"
+	done
+
+	for library in "${liblist[@]}"; do
+		NAME="LOVE_LIBRARY_$(upper "$library")"
+		printf "if $NAME\n"
+		printf "liblove${love_amsuffix}_la_SOURCES += \$(liblove_library_$library)\n"
+		printf "endif\n\n"
+	done
+
 	cd ../..
 }
 
 genflags()
 {
-	for flag in $flags; do
-		prettyflag="$(echo "$flag" | sed 's/-/ love./' | sed 's/-/./g')"
-		varflag="enable_$(echo "$flag" | sed 's/^[^-]*-//' | sed 's/[^a-zA-Z0-9]/_/')"
-		defineflag="LOVE_ENABLE_$(upper $(echo $flag | sed 's/^[^-]*-//' | sed 's/-/_/g'))"
+	printf > configure-modules-pre.ac
+	printf > configure-modules-post.ac
+	for flag in "${flags[@]}"; do
+		prettyflag="$(echo "$flag" | sed -e 's/-/ love./' -e 's/-/./g')"
+		varflag="enable_$(echo "$flag" | sed -e 's/[^a-zA-Z0-9]/_/')"
+		defineflag="LOVE_ENABLE_$(upper $(echo $flag | sed -e 's/^[^-]*-//' -e 's/-/_/g'))"
 		amflag="$(upper $(echo love-$flag | sed 's/-/_/g'))"
-		printf "AC_ARG_ENABLE([$flag], [  --disable-$flag    Turn off $prettyflag], [], [$varflag=true])\n"
-		printf "AH_TEMPLATE([$defineflag], [])\n"
-		printf "if test x\"\$$varflag\" = xtrue; then\n"
-		printf "    AC_DEFINE([$defineflag], [])\n"
-		printf "fi\n"
-		printf "AM_CONDITIONAL([$amflag], [test x\$$varflag = xtrue])\n\n"
+
+		# Don't generate an --enable rule for libraries
+		if [[ "$(echo $flag | sed -e '/^library-/d')" != "" ]]; then
+			printf "AC_ARG_ENABLE([$flag], [  --disable-$flag    Turn off $prettyflag], [], [$varflag=yes])\n" >> configure-modules-pre.ac
+		fi
+
+		printf "AH_TEMPLATE([$defineflag], [])\n" >> configure-modules-post.ac
+		printf "if test x\"\$$varflag\" = xyes; then\n" >> configure-modules-post.ac
+		printf "    AC_DEFINE([$defineflag], [])\n" >> configure-modules-post.ac
+		printf "fi\n" >> configure-modules-post.ac
+		printf "AM_CONDITIONAL([$amflag], [test x\$$varflag = xyes])\n\n" >> configure-modules-post.ac
 	done
 }
 
@@ -147,23 +150,16 @@ liblove${love_amsuffix}_la_LIBADD = \
 	\$(SDL_LIBS) \$(freetype2_LIBS) \$(lua_LIBS)\
 	\$(openal_LIBS) \$(zlib_LIBS) \$(libmodplug_LIBS)\
 	\$(vorbisfile_LIBS) \$(theora_LIBS)
+
 EOF
 
 genmodules >> src/Makefile.am
 
-cat >> src/Makefile.am << EOF
-if !LOVE_NOMPG123
-liblove${love_amsuffix}_la_SOURCES += \\
-    ./modules/sound/lullaby/Mpg123Decoder.cpp \\
-    ./modules/sound/lullaby/Mpg123Decoder.h
-endif
-EOF
-
 echo "src/Makefile.am is updated! ^.^"
 
 echo "Generating configure-modules.ac"
-genflags > configure-modules.ac
-cat >> configure-modules.ac << EOF
+genflags
+cat >> configure-modules-post.ac << EOF
 AC_SUBST([LOVE_SUFFIX], [${love_suffix}])
 EOF
 echo "configure-modules.ac is updated! ^.^"