Merge pull request #3731 from martin-frbg/linktest-c99

Add function prototypes to make linktest C99-compliant

exports/gensymbol

@@ -4000,6 +4000,22 @@ case "$p1" in
         no_underscore_objs="$no_underscore_objs $misc_common_objs"
 
         printf 'int main(void){\n'
+        for obj in $underscore_objs; do
+            [ "$obj" != "xerbla" ] && printf 'extern void %s%s%s%s();\n' \
+                "$symbolprefix" "$obj" "$bu" "$symbolsuffix"
+        done
+
+        for obj in $need_2underscore_objs; do
+            printf 'extern void %s%s%s%s%s();\n' \
+                "$symbolprefix" "$obj" "$bu" "$bu" "$symbolsuffix"
+        done
+
+        for obj in $no_underscore_objs; do
+            printf 'extern void %s%s%s();\n' \
+                "$symbolprefix" "$obj" "$symbolsuffix"
+        done
+
+        printf '\n'
         for obj in $underscore_objs; do
             [ "$obj" != "xerbla" ] && printf '%s%s%s%s();\n' \
                 "$symbolprefix" "$obj" "$bu" "$symbolsuffix"

exports/gensymbol.pl

@@ -3955,6 +3955,18 @@ if ($ARGV[0] eq "linktest") {
     @no_underscore_objs = (@no_underscore_objs, @misc_common_objs);
 
     print "int main(void){\n";
+    foreach $objs (@underscore_objs) {
+        print "extern void ", $symbolprefix, $objs, $bu, $symbolsuffix, "();\n" if $objs ne "xerbla";
+    }
+
+    foreach $objs (@need_2underscore_objs) {
+        print "extern void ", $symbolprefix, $objs, $bu, $bu, $symbolsuffix, "();\n";
+    }
+
+    foreach $objs (@no_underscore_objs) {
+        print "extern void ", $symbolprefix, $objs, $symbolsuffix, "();\n";
+    }
+
     foreach $objs (@underscore_objs) {
         print $symbolprefix, $objs, $bu, $symbolsuffix, "();\n" if $objs ne "xerbla";
     }