From 1759706eb4ca85142ac873a5b3019a81d476ae74 Mon Sep 17 00:00:00 2001
From: jnsh <39574454+jnsh@users.noreply.github.com>
Date: Sat, 8 Sep 2018 18:13:25 +0300
Subject: [PATCH] Separate gtk3 and gnome-shell versioning (#117)

* Separate gtk3 and gnome-shell version detection

GTK3's version isn't tied to gnome desktop version any more. Let's
separate the versioning for gtk3 and gnome-shell themes to reflect that.

* Add symlinks to support shell versions up to 3.30

* Fix indentation in autoconf macros

* Detect version with gnome-shell: grab the shell version directly from 'gnome-shell --version'
output.

* Update README for gtk3 and gnome-shell options

GTK3 and gnome-shell themes are now versioned separately.

* Update build options indentation in README
---
 README.md               | 37 +++++++++++------------
 common/Makefile.am      | 66 ++++++++++++++++++++---------------------
 common/gnome-shell/3.26 |  1 +
 common/gnome-shell/3.28 |  1 +
 common/gnome-shell/3.30 |  1 +
 configure.ac            |  3 +-
 m4/arc-gnome-shell.m4   | 47 +++++++++++++++++++++++++++++
 m4/arc-gnome.m4         | 38 ------------------------
 m4/arc-gtk3.m4          | 38 ++++++++++++++++++++++++
 9 files changed, 141 insertions(+), 91 deletions(-)
 create mode 120000 common/gnome-shell/3.26
 create mode 120000 common/gnome-shell/3.28
 create mode 120000 common/gnome-shell/3.30
 create mode 100644 m4/arc-gnome-shell.m4
 delete mode 100644 m4/arc-gnome.m4
 create mode 100644 m4/arc-gtk3.m4

diff --git a/README.md b/README.md
index c62ae1a..8c0b1fa 100644
--- a/README.md
+++ b/README.md
@@ -77,26 +77,25 @@ Clone the git repository with
 
 Other options to pass to autogen.sh are
 
-    --disable-transparency     disable transparency in the GTK3 theme
-    --disable-light            disable Arc Light support
-    --disable-darker           disable Arc Darker support
-    --disable-dark             disable Arc Dark support
-    --disable-cinnamon         disable Cinnamon support
-    --disable-gnome-shell      disable GNOME Shell support
-    --disable-gtk2             disable GTK2 support
-    --disable-gtk3             disable GTK3 support
-    --disable-metacity         disable Metacity support
-    --disable-unity            disable Unity support
-    --disable-xfwm             disable XFWM support
-    --disable-plank            disable Plank theme support
-    --disable-openbox          disable Openbox support
+    --disable-transparency         disable transparency in the GTK3 theme
+    --disable-light                disable Arc Light support
+    --disable-darker               disable Arc Darker support
+    --disable-dark                 disable Arc Dark support
+    --disable-cinnamon             disable Cinnamon support
+    --disable-gnome-shell          disable GNOME Shell support
+    --disable-gtk2                 disable GTK2 support
+    --disable-gtk3                 disable GTK3 support
+    --disable-metacity             disable Metacity support
+    --disable-unity                disable Unity support
+    --disable-xfwm                 disable XFWM support
+    --disable-plank                disable Plank theme support
+    --disable-openbox              disable Openbox support
 
-    --with-gnome=<version>     build the theme for a specific GNOME version (3.18, 3.20, 3.22)
-                               Note 1: Normally the correct version is detected automatically and this
-                               option should not be needed.
-                               Note 2: For GNOME 3.24 and 3.26, use --with-gnome=3.22
-                               (this works for now, the build system will be improved in the future)
-    --with-custom=<script>     run the executable script file in the custom subfolder
+    --with-gnome-shell=<version>   build the gnome-shell theme for a specific version
+    --with-gtk3=<version>          build the GTK3 theme for a specific version
+                                   Note: Normally the correct version is detected automatically
+                                   and these options should not be needed.
+    --with-custom=<script>         run the executable script file in the custom subfolder
 
 After the installation is complete the theme can be activated with `gnome-tweak-tool` or a similar program by selecting `Arc`, `Arc-Darker` or `Arc-Dark` as Window/GTK+ theme and `Arc` or `Arc-Dark` as GNOME Shell/Cinnamon theme.
 
diff --git a/common/Makefile.am b/common/Makefile.am
index 6e5c402..d3353b6 100644
--- a/common/Makefile.am
+++ b/common/Makefile.am
@@ -68,9 +68,9 @@ endif # ENABLE_GNOME_SHELL
 if ENABLE_GNOME_SHELL
 	$(MKDIR_P) $(ithemedir)/gnome-shell
 
-	sassc $(srcdir)/gnome-shell/$(GNOME_VERSION)/sass/gnome-shell.scss $(srcdir)/gnome-shell/$(GNOME_VERSION)/gnome-shell.css;
+	sassc $(srcdir)/gnome-shell/$(GNOME_SHELL_VERSION)/sass/gnome-shell.scss $(srcdir)/gnome-shell/$(GNOME_SHELL_VERSION)/gnome-shell.css;
 
-	cd $(srcdir)/gnome-shell/$(GNOME_VERSION) && cp -R \
+	cd $(srcdir)/gnome-shell/$(GNOME_SHELL_VERSION) && cp -R \
 		common-assets \
 		light-assets \
 		gnome-shell.css \
@@ -79,14 +79,14 @@ if ENABLE_GNOME_SHELL
 if ENABLE_DARK
 	$(MKDIR_P) $(ithemedarkdir)/gnome-shell
 
-	sassc $(srcdir)/gnome-shell/$(GNOME_VERSION)/sass/gnome-shell-dark.scss $(srcdir)/gnome-shell/$(GNOME_VERSION)/gnome-shell-dark.css;
+	sassc $(srcdir)/gnome-shell/$(GNOME_SHELL_VERSION)/sass/gnome-shell-dark.scss $(srcdir)/gnome-shell/$(GNOME_SHELL_VERSION)/gnome-shell-dark.css;
 
-	cd $(srcdir)/gnome-shell/$(GNOME_VERSION) && cp -R \
+	cd $(srcdir)/gnome-shell/$(GNOME_SHELL_VERSION) && cp -R \
 		common-assets \
 		dark-assets \
 		$(ithemedarkdir)/gnome-shell
 
-	cd $(srcdir)/gnome-shell/$(GNOME_VERSION) && cp -R \
+	cd $(srcdir)/gnome-shell/$(GNOME_SHELL_VERSION) && cp -R \
 		gnome-shell-dark.css \
 		$(ithemedarkdir)/gnome-shell/gnome-shell.css
 endif # ENABLE_DARK
@@ -143,17 +143,17 @@ endif # ENABLE_GTK2
 
 
 if ENABLE_GTK3
-	cd $(srcdir)/gtk-3.0/$(GNOME_VERSION) && $(MKDIR_P) assets && ./render-assets.sh
+	cd $(srcdir)/gtk-3.0/$(GTK3_VERSION) && $(MKDIR_P) assets && ./render-assets.sh
 
 if ENABLE_LIGHT
 	$(MKDIR_P) $(ithemedir)/gtk-3.0
 
 	cd $(srcdir)/gtk-3.0 && cp thumbnail.png $(ithemedir)/gtk-3.0
 
-	sassc $(srcdir)/gtk-3.0/$(GNOME_VERSION)/sass/gtk.scss $(srcdir)/gtk-3.0/$(GNOME_VERSION)/gtk.css;
-	sassc $(srcdir)/gtk-3.0/$(GNOME_VERSION)/sass/gtk-dark.scss $(srcdir)/gtk-3.0/$(GNOME_VERSION)/gtk-dark.css;
+	sassc $(srcdir)/gtk-3.0/$(GTK3_VERSION)/sass/gtk.scss $(srcdir)/gtk-3.0/$(GTK3_VERSION)/gtk.css;
+	sassc $(srcdir)/gtk-3.0/$(GTK3_VERSION)/sass/gtk-dark.scss $(srcdir)/gtk-3.0/$(GTK3_VERSION)/gtk-dark.css;
 
-	cd $(srcdir)/gtk-3.0/$(GNOME_VERSION) && cp -R \
+	cd $(srcdir)/gtk-3.0/$(GTK3_VERSION) && cp -R \
 		assets \
 		gtk.css \
 		gtk-dark.css \
@@ -165,16 +165,16 @@ if ENABLE_DARKER
 
 	cd $(srcdir)/gtk-3.0 && cp thumbnail.png $(ithemedarkerdir)/gtk-3.0
 
-	sassc $(srcdir)/gtk-3.0/$(GNOME_VERSION)/sass/gtk-dark.scss $(srcdir)/gtk-3.0/$(GNOME_VERSION)/gtk-dark.css;
-	sassc $(srcdir)/gtk-3.0/$(GNOME_VERSION)/sass/gtk-darker.scss $(srcdir)/gtk-3.0/$(GNOME_VERSION)/gtk-darker.css;
-	sassc $(srcdir)/gtk-3.0/$(GNOME_VERSION)/sass/gtk.scss $(srcdir)/gtk-3.0/$(GNOME_VERSION)/gtk.css;
+	sassc $(srcdir)/gtk-3.0/$(GTK3_VERSION)/sass/gtk-dark.scss $(srcdir)/gtk-3.0/$(GTK3_VERSION)/gtk-dark.css;
+	sassc $(srcdir)/gtk-3.0/$(GTK3_VERSION)/sass/gtk-darker.scss $(srcdir)/gtk-3.0/$(GTK3_VERSION)/gtk-darker.css;
+	sassc $(srcdir)/gtk-3.0/$(GTK3_VERSION)/sass/gtk.scss $(srcdir)/gtk-3.0/$(GTK3_VERSION)/gtk.css;
 
-	cd $(srcdir)/gtk-3.0/$(GNOME_VERSION) && cp -R \
+	cd $(srcdir)/gtk-3.0/$(GTK3_VERSION) && cp -R \
 		assets \
 		gtk-dark.css \
 		$(ithemedarkerdir)/gtk-3.0
 
-	cd $(srcdir)/gtk-3.0/$(GNOME_VERSION) && cp -R \
+	cd $(srcdir)/gtk-3.0/$(GTK3_VERSION) && cp -R \
 		gtk-darker.css \
 		$(ithemedarkerdir)/gtk-3.0/gtk.css
 endif # ENABLE_DARKER
@@ -184,14 +184,14 @@ if ENABLE_DARK
 
 	cd $(srcdir)/gtk-3.0 && cp thumbnail-dark.png $(ithemedarkdir)/gtk-3.0/thumbnail.png
 
-	cd $(srcdir)/gtk-3.0/$(GNOME_VERSION) && cp -R \
+	cd $(srcdir)/gtk-3.0/$(GTK3_VERSION) && cp -R \
 		assets \
 		$(ithemedarkdir)/gtk-3.0
 
-	sassc $(srcdir)/gtk-3.0/$(GNOME_VERSION)/sass/gtk-dark.scss $(srcdir)/gtk-3.0/$(GNOME_VERSION)/gtk-dark.css;
-	sassc $(srcdir)/gtk-3.0/$(GNOME_VERSION)/sass/gtk.scss $(srcdir)/gtk-3.0/$(GNOME_VERSION)/gtk.css;
+	sassc $(srcdir)/gtk-3.0/$(GTK3_VERSION)/sass/gtk-dark.scss $(srcdir)/gtk-3.0/$(GTK3_VERSION)/gtk-dark.css;
+	sassc $(srcdir)/gtk-3.0/$(GTK3_VERSION)/sass/gtk.scss $(srcdir)/gtk-3.0/$(GTK3_VERSION)/gtk.css;
 
-	cd $(srcdir)/gtk-3.0/$(GNOME_VERSION) && cp -R \
+	cd $(srcdir)/gtk-3.0/$(GTK3_VERSION) && cp -R \
 		gtk-dark.css \
 		$(ithemedarkdir)/gtk-3.0/gtk.css
 endif # ENABLE_DARK
@@ -199,40 +199,40 @@ endif # ENABLE_DARK
 if !ENABLE_TRANSPARENCY
 
 if ENABLE_LIGHT
-	sassc $(srcdir)/gtk-3.0/$(GNOME_VERSION)/sass/gtk-solid.scss $(srcdir)/gtk-3.0/$(GNOME_VERSION)/gtk-solid.css;
-	sassc $(srcdir)/gtk-3.0/$(GNOME_VERSION)/sass/gtk-solid-dark.scss $(srcdir)/gtk-3.0/$(GNOME_VERSION)/gtk-solid-dark.css;
-	sassc $(srcdir)/gtk-3.0/$(GNOME_VERSION)/sass/gtk.scss $(srcdir)/gtk-3.0/$(GNOME_VERSION)/gtk.css;
-	sassc $(srcdir)/gtk-3.0/$(GNOME_VERSION)/sass/gtk-dark.scss $(srcdir)/gtk-3.0/$(GNOME_VERSION)/gtk-dark.css;
+	sassc $(srcdir)/gtk-3.0/$(GTK3_VERSION)/sass/gtk-solid.scss $(srcdir)/gtk-3.0/$(GTK3_VERSION)/gtk-solid.css;
+	sassc $(srcdir)/gtk-3.0/$(GTK3_VERSION)/sass/gtk-solid-dark.scss $(srcdir)/gtk-3.0/$(GTK3_VERSION)/gtk-solid-dark.css;
+	sassc $(srcdir)/gtk-3.0/$(GTK3_VERSION)/sass/gtk.scss $(srcdir)/gtk-3.0/$(GTK3_VERSION)/gtk.css;
+	sassc $(srcdir)/gtk-3.0/$(GTK3_VERSION)/sass/gtk-dark.scss $(srcdir)/gtk-3.0/$(GTK3_VERSION)/gtk-dark.css;
 
-	cd $(srcdir)/gtk-3.0/$(GNOME_VERSION) && cp -R \
+	cd $(srcdir)/gtk-3.0/$(GTK3_VERSION) && cp -R \
 		gtk-solid.css \
 		$(ithemedir)/gtk-3.0/gtk.css
 
-	cd $(srcdir)/gtk-3.0/$(GNOME_VERSION) && cp -R \
+	cd $(srcdir)/gtk-3.0/$(GTK3_VERSION) && cp -R \
 		gtk-solid-dark.css \
 		$(ithemedir)/gtk-3.0/gtk-dark.css
 endif # ENABLE_LIGHT
 
 if ENABLE_DARKER
-	sassc $(srcdir)/gtk-3.0/$(GNOME_VERSION)/sass/gtk-solid-darker.scss $(srcdir)/gtk-3.0/$(GNOME_VERSION)/gtk-solid-darker.css;
-	sassc $(srcdir)/gtk-3.0/$(GNOME_VERSION)/sass/gtk-solid-dark.scss $(srcdir)/gtk-3.0/$(GNOME_VERSION)/gtk-solid-dark.css;
-	sassc $(srcdir)/gtk-3.0/$(GNOME_VERSION)/sass/gtk.scss $(srcdir)/gtk-3.0/$(GNOME_VERSION)/gtk.css;
-	sassc $(srcdir)/gtk-3.0/$(GNOME_VERSION)/sass/gtk-dark.scss $(srcdir)/gtk-3.0/$(GNOME_VERSION)/gtk-dark.css;
+	sassc $(srcdir)/gtk-3.0/$(GTK3_VERSION)/sass/gtk-solid-darker.scss $(srcdir)/gtk-3.0/$(GTK3_VERSION)/gtk-solid-darker.css;
+	sassc $(srcdir)/gtk-3.0/$(GTK3_VERSION)/sass/gtk-solid-dark.scss $(srcdir)/gtk-3.0/$(GTK3_VERSION)/gtk-solid-dark.css;
+	sassc $(srcdir)/gtk-3.0/$(GTK3_VERSION)/sass/gtk.scss $(srcdir)/gtk-3.0/$(GTK3_VERSION)/gtk.css;
+	sassc $(srcdir)/gtk-3.0/$(GTK3_VERSION)/sass/gtk-dark.scss $(srcdir)/gtk-3.0/$(GTK3_VERSION)/gtk-dark.css;
 
-	cd $(srcdir)/gtk-3.0/$(GNOME_VERSION) && cp -R \
+	cd $(srcdir)/gtk-3.0/$(GTK3_VERSION) && cp -R \
 		gtk-solid-darker.css \
 		$(ithemedarkerdir)/gtk-3.0/gtk.css
 
-	cd $(srcdir)/gtk-3.0/$(GNOME_VERSION) && cp -R \
+	cd $(srcdir)/gtk-3.0/$(GTK3_VERSION) && cp -R \
 		gtk-solid-dark.css \
 		$(ithemedarkerdir)/gtk-3.0/gtk-dark.css
 endif # ENABLE_DARKER
 
 if ENABLE_DARK
-	sassc $(srcdir)/gtk-3.0/$(GNOME_VERSION)/sass/gtk-solid-dark.scss $(srcdir)/gtk-3.0/$(GNOME_VERSION)/gtk-solid-dark.css;
-	sassc $(srcdir)/gtk-3.0/$(GNOME_VERSION)/sass/gtk.scss $(srcdir)/gtk-3.0/$(GNOME_VERSION)/gtk.css;
+	sassc $(srcdir)/gtk-3.0/$(GTK3_VERSION)/sass/gtk-solid-dark.scss $(srcdir)/gtk-3.0/$(GTK3_VERSION)/gtk-solid-dark.css;
+	sassc $(srcdir)/gtk-3.0/$(GTK3_VERSION)/sass/gtk.scss $(srcdir)/gtk-3.0/$(GTK3_VERSION)/gtk.css;
 
-	cd $(srcdir)/gtk-3.0/$(GNOME_VERSION) && cp -R \
+	cd $(srcdir)/gtk-3.0/$(GTK3_VERSION) && cp -R \
 		gtk-solid-dark.css \
 		$(ithemedarkdir)/gtk-3.0/gtk.css
 endif # ENABLE_DARK
diff --git a/common/gnome-shell/3.26 b/common/gnome-shell/3.26
new file mode 120000
index 0000000..55b698c
--- /dev/null
+++ b/common/gnome-shell/3.26
@@ -0,0 +1 @@
+3.18
\ No newline at end of file
diff --git a/common/gnome-shell/3.28 b/common/gnome-shell/3.28
new file mode 120000
index 0000000..55b698c
--- /dev/null
+++ b/common/gnome-shell/3.28
@@ -0,0 +1 @@
+3.18
\ No newline at end of file
diff --git a/common/gnome-shell/3.30 b/common/gnome-shell/3.30
new file mode 120000
index 0000000..55b698c
--- /dev/null
+++ b/common/gnome-shell/3.30
@@ -0,0 +1 @@
+3.18
\ No newline at end of file
diff --git a/configure.ac b/configure.ac
index db94181..4473944 100644
--- a/configure.ac
+++ b/configure.ac
@@ -26,7 +26,8 @@ ARC_ENABLE([TRANSPARENCY],  [transparency],  [transparency],  [disable])
 ARC_ENABLE([PLANK],         [plank],         [Plank theme],   [disable])
 ARC_ENABLE([OPENBOX],       [openbox],       [Openbox],       [disable])
 
-AS_IF([test "x$ENABLE_GNOME_SHELL$ENABLE_GTK3" != xnono], [ARC_GNOME])
+AS_IF([test "x$ENABLE_GTK3" != xno], [ARC_GTK3])
+AS_IF([test "x$ENABLE_GNOME_SHELL" != xno], [ARC_GNOME_SHELL])
 
 AC_CONFIG_FILES([
     common/Makefile
diff --git a/m4/arc-gnome-shell.m4 b/m4/arc-gnome-shell.m4
new file mode 100644
index 0000000..9193ce4
--- /dev/null
+++ b/m4/arc-gnome-shell.m4
@@ -0,0 +1,47 @@
+# ARC_GNOME_SHELL()
+# ---------------
+AC_DEFUN([ARC_GNOME_SHELL], [
+    GNOME_SHELL_DIR="$srcdir/common/gnome-shell"
+    AC_ARG_WITH(
+        [gnome-shell],
+        [AS_HELP_STRING(
+            [--with-gnome-shell],
+            [gnome-shell minor version]
+        )],
+        [GNOME_SHELL_VERSION="$withval"],
+        [AC_CHECK_PROG(
+            [GNOME_SHELL_FOUND],
+            [gnome-shell],
+            [yes],
+            [no]
+        )
+        AS_IF(
+            [test "x$GNOME_SHELL_FOUND" = xyes],
+            [GNOME_SHELL_VERSION=`gnome-shell --version | cut -d' ' -f3`],
+            [AC_MSG_ERROR([Could not find gnome-shell from \$PATH.])]
+        )
+        AS_IF(
+            [test -z "$GNOME_SHELL_VERSION"],
+            [AC_MSG_ERROR([Could not determine gnome-shell version.])]
+        )]
+    )
+
+    # Trim version extras
+    GNOME_SHELL_VERSION=`echo $GNOME_SHELL_VERSION | cut -d. -f-2`
+
+    # Extra major and minor version components
+    GNOME_SHELL_VERSMJR=`echo $GNOME_SHELL_VERSION | cut -d. -f1`
+    GNOME_SHELL_VERSMNR=`echo $GNOME_SHELL_VERSION | cut -d. -f2`
+
+    # Evenize the minor version for stable versions
+    AS_IF(
+        [test `expr $GNOME_SHELL_VERSMNR % 2` != "0"],
+        [GNOME_SHELL_VERSION="$GNOME_SHELL_VERSMJR.`expr $GNOME_SHELL_VERSMNR + 1`"]
+    )
+    AS_IF(
+        [! test -e "$GNOME_SHELL_DIR/$GNOME_SHELL_VERSION"],
+        [AC_MSG_ERROR([Invalid gnome-shell version: $GNOME_SHELL_VERSION])]
+    )
+    AC_SUBST([GNOME_SHELL_VERSION])
+    AC_MSG_RESULT([Building for gnome-shell $GNOME_SHELL_VERSION])
+])
diff --git a/m4/arc-gnome.m4 b/m4/arc-gnome.m4
deleted file mode 100644
index 11a25db..0000000
--- a/m4/arc-gnome.m4
+++ /dev/null
@@ -1,38 +0,0 @@
-# ARC_GNOME()
-# ---------------
-AC_DEFUN([ARC_GNOME], [
-    GNOMEDIR="$srcdir/common/gtk-3.0"
-    PKG_PROG_PKG_CONFIG()
-    AC_ARG_WITH(
-        [gnome],
-        [AS_HELP_STRING(
-            [--with-gnome],
-            [GNOME minor version]
-        )],
-        [GNOME_VERSION="$withval"],
-        [PKG_CHECK_EXISTS(
-             [gtk+-3.0],
-             [GNOME_VERSION=`$PKG_CONFIG --modversion gtk+-3.0`],
-             [AC_MSG_ERROR([Could not determine GNOME version. Install GTK3 and its development files (libgtk-3-dev for Debian/Ubuntu based distros and gtk3-devel for RPM based distros).])]
-         )]
-    )
-
-    # Trim version extras
-    GNOME_VERSION=`echo $GNOME_VERSION | cut -d. -f-2`
-
-    # Extra major and minor version components
-    GNOME_VERSMJR=`echo $GNOME_VERSION | cut -d. -f1`
-    GNOME_VERSMNR=`echo $GNOME_VERSION | cut -d. -f2`
-
-    # Evenize the minor version for stable versions
-    AS_IF(
-        [test `expr $GNOME_VERSMNR % 2` != "0"],
-        [GNOME_VERSION="$GNOME_VERSMJR.`expr $GNOME_VERSMNR + 1`"]
-    )
-    AS_IF(
-        [! test -e "$GNOMEDIR/$GNOME_VERSION"],
-        [AC_MSG_ERROR([Invalid GNOME version: $GNOME_VERSION])]
-    )
-    AC_SUBST([GNOME_VERSION])
-    AC_MSG_RESULT([Building for GNOME $GNOME_VERSION])
-])
diff --git a/m4/arc-gtk3.m4 b/m4/arc-gtk3.m4
new file mode 100644
index 0000000..fee9a6c
--- /dev/null
+++ b/m4/arc-gtk3.m4
@@ -0,0 +1,38 @@
+# ARC_GTK3()
+# ---------------
+AC_DEFUN([ARC_GTK3], [
+    GTK3DIR="$srcdir/common/gtk-3.0"
+    PKG_PROG_PKG_CONFIG()
+    AC_ARG_WITH(
+        [gtk3],
+        [AS_HELP_STRING(
+            [--with-gtk3],
+            [GTK3 minor version]
+        )],
+        [GTK3_VERSION="$withval"],
+        [PKG_CHECK_EXISTS(
+            [gtk+-3.0],
+            [GTK3_VERSION=`$PKG_CONFIG --modversion gtk+-3.0`],
+            [AC_MSG_ERROR([Could not determine GTK3 version. Install GTK3 and its development files (libgtk-3-dev for Debian/Ubuntu based distros and gtk3-devel for RPM based distros).])]
+        )]
+    )
+
+    # Trim version extras
+    GTK3_VERSION=`echo $GTK3_VERSION | cut -d. -f-2`
+
+    # Extra major and minor version components
+    GTK3_VERSMJR=`echo $GTK3_VERSION | cut -d. -f1`
+    GTK3_VERSMNR=`echo $GTK3_VERSION | cut -d. -f2`
+
+    # Evenize the minor version for stable versions
+    AS_IF(
+        [test `expr $GTK3_VERSMNR % 2` != "0"],
+        [GTK3_VERSION="$GTK3_VERSMJR.`expr $GTK3_VERSMNR + 1`"]
+    )
+    AS_IF(
+        [! test -e "$GTK3DIR/$GTK3_VERSION"],
+        [AC_MSG_ERROR([Invalid GTK3 version: $GTK3_VERSION])]
+    )
+    AC_SUBST([GTK3_VERSION])
+    AC_MSG_RESULT([Building for GTK3 $GTK3_VERSION])
+])