--- a/XftFontDescription.st	Sat May 19 16:21:45 2018 +0200
+++ b/XftFontDescription.st	Sat May 19 16:27:10 2018 +0200
@@ -573,6 +573,23 @@
     "
 ! !
 
+!XftFontDescription class methodsFor:'utilities'!
+
+fixedLC_CTYPE
+    "to suppress the disturbing warning messages from fontconfig,
+     if LC_CTYPE is wrong (osx problem only?)"
+
+    |lc_CTYPE|
+    
+    lc_CTYPE := OperatingSystem getEnvironment:'LC_CTYPE'.
+    lc_CTYPE = 'UTF-8' ifTrue:[
+        ^ (Smalltalk language
+          ,'_',Smalltalk languageTerritory asUppercase
+          ,'.UTF-8').
+    ].
+    ^ lc_CTYPE
+! !
+
 !XftFontDescription methodsFor:'accessing'!
 
 encoding
@@ -769,65 +786,67 @@
     |displayId myPatternHandle closestPatternHandle newFontId computedWeight deviceFont|
 
     (device == aGraphicsDevice) ifTrue:[
-	"I am already assigned to that device ..."
-	^ self
+        "I am already assigned to that device ..."
+        ^ self
     ].
     aGraphicsDevice isNil ifTrue:[
-	^ self
+        ^ self
     ].
     aGraphicsDevice supportsXftFonts ifFalse:[
-	^ self asNonXftFont onDevice:aGraphicsDevice.
+        ^ self asNonXftFont onDevice:aGraphicsDevice.
     ].
 
     deviceFont := aGraphicsDevice deviceFonts detect:[:eachFont | self sameDeviceFontAs:eachFont] ifNone:[].
     deviceFont notNil ifTrue:[
-	^ deviceFont.
+        ^ deviceFont.
     ].
 
     computedWeight := weight.
     computedWeight isNil ifTrue:[
-	computedWeight := StXFace2FCWeightMap at:(face ? '') asLowercase ifAbsent:[FC_WEIGHT_REGULAR].
+        computedWeight := StXFace2FCWeightMap at:(face ? '') asLowercase ifAbsent:[FC_WEIGHT_REGULAR].
     ].
 
     (OperatingSystem isMAClike and:[FirstTimeCalled ~~ false]) ifTrue:[
-	"Slow font matching is a MAC-only feature"
-	Logger info:'XFT: matching font (this may take a long time, if the system''s font cache needs to be filled first. Be patient...'.
-	FirstTimeCalled := false.
+        "Slow font matching is a MAC-only feature"
+        Logger info:'XFT: matching font (this may take a long time, if the system''s font cache needs to be filled first. Be patient...'.
+        FirstTimeCalled := false.
     ].
 
     [
-	myPatternHandle := FCPatternHandle create.
-	myPatternHandle
-	    add:FC_FOUNDRY value:manufacturer;
-	    add:FC_FAMILY value:family;
-	    add:FC_WEIGHT value:computedWeight;
-	    add:FC_SLANT  value:(StXStyle2FCSlantMap at:(style ? '') asLowercase ifAbsent:[FC_SLANT_ROMAN]).
-	sizeUnit = #px ifTrue:[
-	    myPatternHandle add:FC_PIXEL_SIZE value:(pixelSize isNil ifTrue:[nil] ifFalse:[pixelSize rounded]).
-	] ifFalse:[
-	    myPatternHandle add:FC_SIZE value:(size isNil ifTrue:[nil] ifFalse:[size rounded]).
-	].
+        myPatternHandle := FCPatternHandle create.
+        myPatternHandle
+            add:FC_FOUNDRY value:manufacturer;
+            add:FC_FAMILY value:family;
+            add:FC_WEIGHT value:computedWeight;
+            add:FC_SLANT  value:(StXStyle2FCSlantMap at:(style ? '') asLowercase ifAbsent:[FC_SLANT_ROMAN]).
+        sizeUnit = #px ifTrue:[
+            myPatternHandle add:FC_PIXEL_SIZE value:(pixelSize isNil ifTrue:[nil] ifFalse:[pixelSize rounded]).
+        ] ifFalse:[
+            myPatternHandle add:FC_SIZE value:(size isNil ifTrue:[nil] ifFalse:[size rounded]).
+        ].
 
-	displayId := aGraphicsDevice displayId.
-	closestPatternHandle := myPatternHandle matchFontOnDisplayId:displayId screen:aGraphicsDevice screen.
-	closestPatternHandle notNil ifTrue:[
-	    newFontId := closestPatternHandle getFontOnDisplayId:displayId.
-	    newFontId notNil ifTrue:[
-		"/ Good, this font exists!!
-		device isNil ifTrue:[
-		    deviceFont := self.
-		] ifFalse:[
-		    deviceFont := self copy.
-		].
-		closestPatternHandle := nil.
-		deviceFont setDevice:aGraphicsDevice patternId:nil fontId:newFontId.
-		aGraphicsDevice registerFont:deviceFont.
-		^ deviceFont.
-	    ].
-	].
+        displayId := aGraphicsDevice displayId.
+        
+        OperatingSystem setEnvironment:'LC_CTYPE' to:(self class fixedLC_CTYPE).
+        closestPatternHandle := myPatternHandle matchFontOnDisplayId:displayId screen:aGraphicsDevice screen.
+        closestPatternHandle notNil ifTrue:[
+            newFontId := closestPatternHandle getFontOnDisplayId:displayId.
+            newFontId notNil ifTrue:[
+                "/ Good, this font exists!!
+                device isNil ifTrue:[
+                    deviceFont := self.
+                ] ifFalse:[
+                    deviceFont := self copy.
+                ].
+                closestPatternHandle := nil.
+                deviceFont setDevice:aGraphicsDevice patternId:nil fontId:newFontId.
+                aGraphicsDevice registerFont:deviceFont.
+                ^ deviceFont.
+            ].
+        ].
     ] ensure:[
-	myPatternHandle notNil ifTrue:[myPatternHandle destroy].
-	closestPatternHandle notNil ifTrue:[closestPatternHandle destroy].
+        myPatternHandle notNil ifTrue:[myPatternHandle destroy].
+        closestPatternHandle notNil ifTrue:[closestPatternHandle destroy].
     ].
     ^ aBlock value
 
@@ -1294,12 +1313,8 @@
 
     "/ to suppress the disturbing warning message
     "/ if LC_CTYPE is wrong (osx problem)
-    (OperatingSystem getEnvironment:'LC_CTYPE') = 'UTF-8' ifTrue:[
-        shellEnvironment := Dictionary new.
-        shellEnvironment at:'LC_CTYPE' put:(Smalltalk language
-                                           ,'_',Smalltalk languageTerritory asUppercase
-                                           ,'.UTF-8').
-    ].
+    shellEnvironment := Dictionary new.
+    shellEnvironment at:'LC_CTYPE' put:XftFontDescription fixedLC_CTYPE.
 
     pipeStream := PipeStream 
                     readingFrom:fcListProg, ' -v'