BUILD: Handle the cases where the `arch` command does not exist on the system (manjaro...)

configure

@@ -2815,6 +2815,10 @@ fi
+# Get the architecture, in some cases `arch` is not present on the system
+LKT_ARCH=`arch`
+if test $? -ne 0 ; then LKT_ARCH=`uname -m` ; fi
+
 LKT_PATH_SOURCE="$(dirname $(readlink -f "$0"))"
 LKT_PATH_BUILD="$(pwd)"
@@ -18499,9 +18503,9 @@ fi
   as_fn_error $? "chmod is required for AppImage" "$LINENO" 5
 fi
-    LKT_APPIMAGETOOL="$LKT_PATH_SOURCE/utils/appimagetool-`arch`.AppImage"
-    LKT_LINUXDEPLOY="$LKT_PATH_SOURCE/utils/linuxdeploy-`arch`.AppImage"
-    LKT_LINUXDEPLOYQT="$LKT_PATH_SOURCE/utils/linuxdeploy-qt-`arch`.AppImage"
+    LKT_APPIMAGETOOL="$LKT_PATH_SOURCE/utils/appimagetool-$LKT_ARCH.AppImage"
+    LKT_LINUXDEPLOY="$LKT_PATH_SOURCE/utils/linuxdeploy-$LKT_ARCH.AppImage"
+    LKT_LINUXDEPLOYQT="$LKT_PATH_SOURCE/utils/linuxdeploy-qt-$LKT_ARCH.AppImage"
@@ -18523,7 +18527,7 @@ as_fn_error $? "failed from path
 See \`config.log' for more details" "$LINENO" 5; }
 fi
         else
-            $WGET https://github.com/probonopd/AppImageKit/releases/download/continuous/appimagetool-`arch`.AppImage \
+            $WGET https://github.com/probonopd/AppImageKit/releases/download/continuous/appimagetool-$LKT_ARCH.AppImage \
                 -O "$LKT_APPIMAGETOOL" -a config.wget.log
             $CHMOD 00700 $LKT_PATH_SOURCE/utils/appimagetool.AppImage
             if test $? -eq 0 ; then :
@@ -18663,7 +18667,7 @@ _ACEOF
 cat >>confdefs.h <<_ACEOF
-#define LKT_ARCH "$(arch)"
+#define LKT_ARCH "$LKT_ARCH"
 _ACEOF

configure.ac

@@ -15,6 +15,10 @@ AC_PATH_PROG([MKVPROPEDIT], [mkvpropedit],  [:])
 AC_PATH_PROG([TEST_MAKE],   [make],         [:])
 AC_PATH_PROG([TEST_SQLITE], [sqlite3],      [:])
 
+# Get the architecture, in some cases `arch` is not present on the system
+LKT_ARCH=`arch`
+if test $? -ne 0 ; then LKT_ARCH=`uname -m` ; fi
+
 LKT_PATH_SOURCE="$(dirname $(readlink -f "$0"))"
 LKT_PATH_BUILD="$(pwd)"
 AC_SUBST([LKT_PATH_SOURCE])
@@ -173,9 +177,9 @@ AS_IF([test "x${LKT_APPIMAGE}" = "xyes"], [
     AS_IF([test "$WGET"     = ":"], [AC_MSG_ERROR([wget is required for AppImage])    ])
     AS_IF([test "$CHMOD"    = ":"], [AC_MSG_ERROR([chmod is required for AppImage])   ])
 
-    LKT_APPIMAGETOOL="$LKT_PATH_SOURCE/utils/appimagetool-`arch`.AppImage"
-    LKT_LINUXDEPLOY="$LKT_PATH_SOURCE/utils/linuxdeploy-`arch`.AppImage"
-    LKT_LINUXDEPLOYQT="$LKT_PATH_SOURCE/utils/linuxdeploy-qt-`arch`.AppImage"
+    LKT_APPIMAGETOOL="$LKT_PATH_SOURCE/utils/appimagetool-$LKT_ARCH.AppImage"
+    LKT_LINUXDEPLOY="$LKT_PATH_SOURCE/utils/linuxdeploy-$LKT_ARCH.AppImage"
+    LKT_LINUXDEPLOYQT="$LKT_PATH_SOURCE/utils/linuxdeploy-qt-$LKT_ARCH.AppImage"
     AC_SUBST([LKT_APPIMAGETOOL])
     AC_SUBST([LKT_LINUXDEPLOY])
     AC_SUBST([LKT_LINUXDEPLOYQT])
@@ -188,7 +192,7 @@ AS_IF([test "x${LKT_APPIMAGE}" = "xyes"], [
             cp $PRESENT_IN_PATH $LKT_APPIMAGETOOL
             AS_IF([test $? -eq 0 ], [AC_MSG_RESULT([from path])], [AC_MSG_FAILURE([failed from path])])
         else
-            $WGET https://github.com/probonopd/AppImageKit/releases/download/continuous/appimagetool-`arch`.AppImage \
+            $WGET https://github.com/probonopd/AppImageKit/releases/download/continuous/appimagetool-$LKT_ARCH.AppImage \
                 -O "$LKT_APPIMAGETOOL" -a config.wget.log
             $CHMOD 00700 $LKT_PATH_SOURCE/utils/appimagetool.AppImage
             AS_IF([test $? -eq 0 ], [AC_MSG_RESULT([done])], [AC_MSG_FAILURE([failed])])
@@ -254,7 +258,7 @@ AC_SUBST([LKT_MAN_BINARY])
 AC_DEFINE_UNQUOTED([LKT_COMPILER], ["$CC"], [Lektor compiled with])
 AC_SUBST([LKT_COMPILER])
 
-AC_DEFINE_UNQUOTED([LKT_ARCH], ["$(arch)"], [Host architecture])
+AC_DEFINE_UNQUOTED([LKT_ARCH], ["$LKT_ARCH"], [Host architecture])
 AC_SUBST([LKT_ARCH])
 
 LKT_BUILD_STRING="$(basename $CC)/$(basename $CXX) $(uname -s) $(uname -p) $(uname -r) $(uname -m)"