Fix kernel module path using --with-linux config flag

Sometimes the arch linux kernel is versioned without a minor version number.
For example, 3.14 instead of 3.14.0. However, the kernel module path always
uses the minor version number (/usr/lib/modules/3.14.0-1-ARCH).

This change adds support for detecting missing minor version number in the
linux version and adds "0" to it to create the proper module path.

spl/PKGBUILD

@@ -21,6 +21,19 @@ LINUX_VERSION_X32="3.13.8-1"
 LINUX_VERSION_X64="3.13.8-1"
 [[ $CARCH == "i686" ]] && LINUX_VERSION=$LINUX_VERSION_X32 || LINUX_VERSION=$LINUX_VERSION_X64
 
+# If LINUX_VERSION does not have a minor version, we need to add "0" as the
+# minor version for the kernel module path. Kernel modules for linux versions
+# with no minor version (i.e. 3.14) are kept in /usr/lib/modules/3.14.0-4-ARCH
+[[ $LINUX_VERSION =~ ^[:digit:]+\.[:digit:]+\.([:digit:]+)\-[:digit:]+ ]]
+if [[ ${BASH_REMATCH[1]} == "" ]]; then
+    [[ $LINUX_VERSION =~ ^([[:digit:]\.]+)\-([[:digit:]]+)  ]] &&
+        MOD_LINUX_VERSION=${BASH_REMATCH[1]};
+        MOD_LINUX_PKGREL=${BASH_REMATCH[2]}
+    MOD_BASENAME=${MOD_LINUX_VERSION}.0-$MOD_LINUX_PKGREL-ARCH
+else
+    MOD_BASENAME=$LINUX_VERSION-ARCH
+fi
+
 pkgdesc="Solaris Porting Layer kernel modules."
 depends=("spl-utils" "linux=$LINUX_VERSION")
 makedepends=("linux-headers=$LINUX_VERSION")
@@ -50,11 +63,11 @@ build() {
   ./autogen.sh
   if [[ $CARCH == "i686" ]]; then
     ./configure --prefix=/usr --libdir=/usr/lib --sbindir=/usr/bin \
-                --with-linux=/usr/lib/modules/$LINUX_VERSION_X32-ARCH/build \
+                --with-linux=/usr/lib/modules/$MOD_BASENAME/build \
                 --with-config=kernel --enable-atomic-spinlocks
   else
     ./configure --prefix=/usr --libdir=/usr/lib --sbindir=/usr/bin \
-                --with-linux=/usr/lib/modules/$LINUX_VERSION_X64-ARCH/build \
+                --with-linux=/usr/lib/modules/$MOD_BASENAME/build \
                 --with-config=kernel
   fi
   make

zfs/PKGBUILD

@@ -21,12 +21,18 @@ LINUX_VERSION_X32="3.13.8-1"
 LINUX_VERSION_X64="3.13.8-1"
 [[ $CARCH == "i686" ]] && LINUX_VERSION=$LINUX_VERSION_X32 || LINUX_VERSION=$LINUX_VERSION_X64
 
-# Build the kernel module path string
-[[ $AZB_LINUX_VERSION =~ ^[[:digit:]]+\.[[:digit:]]+\.([[:digit:]]+)\-[[:digit:]]+]] ]] &&
-        MOD_PATH=${BASH_REMATCH[1]}
-
-echo $MOD_PATH
-exit 1
+# If LINUX_VERSION does not have a minor version, we need to add "0" as the
+# minor version for the kernel module path. Kernel modules for linux versions
+# with no minor version (i.e. 3.14) are kept in /usr/lib/modules/3.14.0-4-ARCH
+[[ $LINUX_VERSION =~ ^[:digit:]+\.[:digit:]+\.([:digit:]+)\-[:digit:]+ ]]
+if [[ ${BASH_REMATCH[1]} == "" ]]; then
+    [[ $LINUX_VERSION =~ ^([[:digit:]\.]+)\-([[:digit:]]+)  ]] &&
+        MOD_LINUX_VERSION=${BASH_REMATCH[1]};
+        MOD_LINUX_PKGREL=${BASH_REMATCH[2]}
+    MOD_BASENAME=${MOD_LINUX_VERSION}.0-$MOD_LINUX_PKGREL-ARCH
+else
+    MOD_BASENAME=$LINUX_VERSION-ARCH
+fi
 
 pkgdesc="Kernel modules for the Zettabyte File System."
 depends=("spl=0.6.2_3.13.8-1" "zfs-utils" "linux=$LINUX_VERSION")
@@ -52,7 +58,7 @@ build() {
                 --with-udevdir=/lib/udev \
                 --libexecdir=/usr/lib/zfs-0.6.2 \
                 --with-config=kernel \
-                --with-linux=/usr/lib/modules/$LINUX_VERSION_X32-ARCH/build
+                --with-linux=/usr/lib/modules/$MOD_BASENAME/build
   else
     ./configure --prefix=/usr \
                 --sysconfdir=/etc \
@@ -63,7 +69,7 @@ build() {
                 --with-udevdir=/lib/udev \
                 --libexecdir=/usr/lib/zfs-0.6.2 \
                 --with-config=kernel \
-                --with-linux=/usr/lib/modules/$LINUX_VERSION_X64-ARCH/build
+                --with-linux=/usr/lib/modules/$MOD_BASENAME/build
   fi
   make
 }