diff --git a/test/check-utils b/test/check-utils
index 63df05c..39016dd 100755
--- a/test/check-utils
+++ b/test/check-utils
@@ -2,6 +2,11 @@
 
 . "$(dirname "$0")/functions.inc"
 
+HAVE_GETLINE=$("$ZZCAT" -l | grep -q '^  getline(' && echo "y")
+HAVE_GETDELIM=$("$ZZCAT" -l | grep -q '^  getdelim(' && echo "y")
+HAVE_GETC_UNLOCKED=$("$ZZCAT" -l | grep -q '^  getc_unlocked(' && echo "y")
+HAVE_FGETC_UNLOCKED=$("$ZZCAT" -l | grep -q '^  fgetc_unlocked(' && echo "y")
+
 checkutils()
 {
     r=$1
@@ -56,47 +61,74 @@ checkutils()
         # Regression tests for stuff that used to break
         check "$ZZOPTS" "$ZZCAT -x \"fread(1,33000) fseek(1,SEEK_SET) fread(1,1) fseek(4093,SEEK_CUR) fread(1,1) fseek(1,SEEK_CUR) fread(1,1)\" $file" \
               "eglibc (2.9-21) bug regression"
-        check "$ZZOPTS" "$ZZCAT -x \"repeat(33000,getc_unlocked() ungetc() getline() feof(10))\" $file" \
-              "sed getc_unlocked() bug regression"
+        if [ "$HAVE_GET_UNLOCKED $HAVE_GETLINE" = "y y" ]; then
+          check "$ZZOPTS" "$ZZCAT -x \"repeat(33000,getc_unlocked() ungetc() getline() feof(10))\" $file" \
+                "sed getc_unlocked() bug regression"
+        fi
         # Misc tests
         for n in \
           "fread(1,33000)" \
           "repeat(33,fread(1,1000))" \
           "repeat(1000,fread(1,33))" \
           "getc() fread(1,33000)" \
-          "getc_unlocked() fread(1,33000)" \
           "fgetc() fread(1,33000)" \
-          "fgetc_unlocked() fread(1,33000)" \
           "getc() ungetc() fread(1,33000)" \
-          "getc_unlocked() ungetc() fread(1,33000)" \
           "fgetc() ungetc() fread(1,33000)" \
-          "fgetc_unlocked() ungetc() fread(1,33000)" \
           "repeat(33000,getc(),feof(10))" \
-          "repeat(33000,getc_unlocked(),feof(10))" \
           "repeat(33000,fgetc(),feof(10))" \
-          "repeat(33000,fgetc_unlocked(),feof(10))" \
           "repeat(8000,getc()) fread(1,33000)" \
-          "repeat(8000,getc_unlocked()) fread(1,33000)" \
           "repeat(8000,fgetc()) fread(1,33000)" \
-          "repeat(8000,fgetc_unlocked()) fread(1,33000)" \
-          "repeat(10,getline()) fread(1,33000)" \
-          "repeat(10,getdelim(0)) fread(1,33000)" \
-          "repeat(10,getdelim(' ')) fread(1,33000)" \
           "fread(1,100) fseek(50,SEEK_SET) fread(1,33000)" \
           "fread(1,100) rewind() fseek(50,SEEK_CUR) fread(1,33000)" \
           "fread(1,33000) rewind() repeat(10000,fseek(1,SEEK_CUR) fread(1,1))" \
           "fread(1,33000) rewind() repeat(10000,fseek(2,SEEK_CUR) fread(1,2))" \
           "fread(1,33000) rewind() repeat(10000,fseek(3,SEEK_CUR) fread(1,3))" \
           "fread(1,33000) rewind() repeat(10000,fseek(4,SEEK_CUR) fread(1,4))" \
-          "repeat(33000,getc() ungetc() getline() feof(10))" \
-          "repeat(33000,fgetc() ungetc() getline() feof(10))" \
           "fread(1,33000) fseek(1000,SEEK_CUR) repeat(10000,fread(1,2),feof(10))" \
           "fread(1,33000) fseek(1000,SEEK_CUR) repeat(10000,getc(),feof(10))" \
           "fread(1,33000) fseek(1000,SEEK_CUR) repeat(10000,fgetc(),feof(10))" \
-          "fread(1,33000) fseek(1000,SEEK_CUR) repeat(10000,getc_unlocked(),feof(10))" \
           ; do
             check "$ZZOPTS" "$ZZCAT -x \"$n\" $file" "$n"
         done
+        # Platform-specific tests
+        if [ "$HAVE_GETLINE" = "y" ]; then
+            for n in \
+              "repeat(10,getline()) fread(1,33000)" \
+              "repeat(33000,getc() ungetc() getline() feof(10))" \
+              "repeat(33000,fgetc() ungetc() getline() feof(10))" \
+              ; do
+                check "$ZZOPTS" "$ZZCAT -x \"$n\" $file" "$n"
+            done
+        fi
+        if [ "$HAVE_GETDELIM" = "y" ]; then
+            for n in \
+              "repeat(10,getdelim(0)) fread(1,33000)" \
+              "repeat(10,getdelim(' ')) fread(1,33000)" \
+              ; do
+                check "$ZZOPTS" "$ZZCAT -x \"$n\" $file" "$n"
+            done
+        fi
+        if [ "$HAVE_GETC_UNLOCKED" = "y" ]; then
+            for n in \
+              "getc_unlocked() fread(1,33000)" \
+              "getc_unlocked() ungetc() fread(1,33000)" \
+              "repeat(33000,getc_unlocked(),feof(10))" \
+              "repeat(8000,getc_unlocked()) fread(1,33000)" \
+              "fread(1,33000) fseek(1000,SEEK_CUR) repeat(10000,getc_unlocked(),feof(10))" \
+              ; do
+                check "$ZZOPTS" "$ZZCAT -x \"$n\" $file" "$n"
+            done
+        fi
+        if [ "$HAVE_FGETC_UNLOCKED" = "y" ]; then
+            for n in \
+              "fgetc_unlocked() fread(1,33000)" \
+              "fgetc_unlocked() ungetc() fread(1,33000)" \
+              "repeat(33000,fgetc_unlocked(),feof(10))" \
+              "repeat(8000,fgetc_unlocked()) fread(1,33000)" \
+              ; do
+                check "$ZZOPTS" "$ZZCAT -x \"$n\" $file" "$n"
+            done
+        fi
     done
 }