https://bugs.gentoo.org/831161
Backport of https://github.com/scribusproject/scribus/commit/80405ce

From: Jean Ghali <jghali@libertysurf.fr>
Date: Mon, 10 Jan 2022 20:38:51 +0000
Subject: [PATCH] Rename byte() to to_byte() in order to avoid potential
 conflict with std::byte in c++17 mode
--- a/scribus/third_party/prc/oPRCFile.cc
+++ b/scribus/third_party/prc/oPRCFile.cc
@@ -76,3 +76,3 @@
 // Map [0,1] to [0,255]
-inline uint8_t byte(double r) 
+inline uint8_t to_byte(double r) 
 {
@@ -451,5 +451,5 @@
               {
-                tess->rgba_vertices.push_back(byte(lit->color.red));
-                tess->rgba_vertices.push_back(byte(lit->color.green));
-                tess->rgba_vertices.push_back(byte(lit->color.blue));
+                tess->rgba_vertices.push_back(to_byte(lit->color.red));
+                tess->rgba_vertices.push_back(to_byte(lit->color.green));
+                tess->rgba_vertices.push_back(to_byte(lit->color.blue));
               }
@@ -595,19 +595,19 @@
           {
-            tessFace->rgba_vertices.push_back(byte(C[1].R));
-            tessFace->rgba_vertices.push_back(byte(C[1].G));
-            tessFace->rgba_vertices.push_back(byte(C[1].B));
+            tessFace->rgba_vertices.push_back(to_byte(C[1].R));
+            tessFace->rgba_vertices.push_back(to_byte(C[1].G));
+            tessFace->rgba_vertices.push_back(to_byte(C[1].B));
             if(tessFace->is_rgba)
-              tessFace->rgba_vertices.push_back(byte(C[1].A));
+              tessFace->rgba_vertices.push_back(to_byte(C[1].A));
             
-            tessFace->rgba_vertices.push_back(byte(C[2].R));
-            tessFace->rgba_vertices.push_back(byte(C[2].G));
-            tessFace->rgba_vertices.push_back(byte(C[2].B));
+            tessFace->rgba_vertices.push_back(to_byte(C[2].R));
+            tessFace->rgba_vertices.push_back(to_byte(C[2].G));
+            tessFace->rgba_vertices.push_back(to_byte(C[2].B));
             if(tessFace->is_rgba)
-              tessFace->rgba_vertices.push_back(byte(C[2].A));
+              tessFace->rgba_vertices.push_back(to_byte(C[2].A));
             
-            tessFace->rgba_vertices.push_back(byte(C[3].R));
-            tessFace->rgba_vertices.push_back(byte(C[3].G));
-            tessFace->rgba_vertices.push_back(byte(C[3].B));
+            tessFace->rgba_vertices.push_back(to_byte(C[3].R));
+            tessFace->rgba_vertices.push_back(to_byte(C[3].G));
+            tessFace->rgba_vertices.push_back(to_byte(C[3].B));
             if(tessFace->is_rgba)
-              tessFace->rgba_vertices.push_back(byte(C[3].A));
+              tessFace->rgba_vertices.push_back(to_byte(C[3].A));
           }
@@ -622,19 +622,19 @@
           {
-            tessFace->rgba_vertices.push_back(byte(C[0].R));
-            tessFace->rgba_vertices.push_back(byte(C[0].G));
-            tessFace->rgba_vertices.push_back(byte(C[0].B));
+            tessFace->rgba_vertices.push_back(to_byte(C[0].R));
+            tessFace->rgba_vertices.push_back(to_byte(C[0].G));
+            tessFace->rgba_vertices.push_back(to_byte(C[0].B));
             if(tessFace->is_rgba)
-              tessFace->rgba_vertices.push_back(byte(C[0].A));
+              tessFace->rgba_vertices.push_back(to_byte(C[0].A));
             
-            tessFace->rgba_vertices.push_back(byte(C[2].R));
-            tessFace->rgba_vertices.push_back(byte(C[2].G));
-            tessFace->rgba_vertices.push_back(byte(C[2].B));
+            tessFace->rgba_vertices.push_back(to_byte(C[2].R));
+            tessFace->rgba_vertices.push_back(to_byte(C[2].G));
+            tessFace->rgba_vertices.push_back(to_byte(C[2].B));
             if(tessFace->is_rgba)
-              tessFace->rgba_vertices.push_back(byte(C[2].A));
+              tessFace->rgba_vertices.push_back(to_byte(C[2].A));
             
-            tessFace->rgba_vertices.push_back(byte(C[3].R));
-            tessFace->rgba_vertices.push_back(byte(C[3].G));
-            tessFace->rgba_vertices.push_back(byte(C[3].B));
+            tessFace->rgba_vertices.push_back(to_byte(C[3].R));
+            tessFace->rgba_vertices.push_back(to_byte(C[3].G));
+            tessFace->rgba_vertices.push_back(to_byte(C[3].B));
             if(tessFace->is_rgba)
-              tessFace->rgba_vertices.push_back(byte(C[3].A));
+              tessFace->rgba_vertices.push_back(to_byte(C[3].A));
           }
@@ -646,19 +646,19 @@
           {
-            tessFace->rgba_vertices.push_back(byte(C[3].R));
-            tessFace->rgba_vertices.push_back(byte(C[3].G));
-            tessFace->rgba_vertices.push_back(byte(C[3].B));
+            tessFace->rgba_vertices.push_back(to_byte(C[3].R));
+            tessFace->rgba_vertices.push_back(to_byte(C[3].G));
+            tessFace->rgba_vertices.push_back(to_byte(C[3].B));
             if(tessFace->is_rgba)
-              tessFace->rgba_vertices.push_back(byte(C[3].A));
+              tessFace->rgba_vertices.push_back(to_byte(C[3].A));
           
-            tessFace->rgba_vertices.push_back(byte(C[1].R));
-            tessFace->rgba_vertices.push_back(byte(C[1].G));
-            tessFace->rgba_vertices.push_back(byte(C[1].B));
+            tessFace->rgba_vertices.push_back(to_byte(C[1].R));
+            tessFace->rgba_vertices.push_back(to_byte(C[1].G));
+            tessFace->rgba_vertices.push_back(to_byte(C[1].B));
             if(tessFace->is_rgba)
-              tessFace->rgba_vertices.push_back(byte(C[1].A));
+              tessFace->rgba_vertices.push_back(to_byte(C[1].A));
           
-            tessFace->rgba_vertices.push_back(byte(C[0].R));
-            tessFace->rgba_vertices.push_back(byte(C[0].G));
-            tessFace->rgba_vertices.push_back(byte(C[0].B));
+            tessFace->rgba_vertices.push_back(to_byte(C[0].R));
+            tessFace->rgba_vertices.push_back(to_byte(C[0].G));
+            tessFace->rgba_vertices.push_back(to_byte(C[0].B));
             if(tessFace->is_rgba)
-              tessFace->rgba_vertices.push_back(byte(C[0].A));
+              tessFace->rgba_vertices.push_back(to_byte(C[0].A));
           }
@@ -1650,17 +1650,17 @@
     {
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][0]].R));
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][0]].G));
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][0]].B));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][0]].R));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][0]].G));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][0]].B));
        if(tessFace->is_rgba)
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][0]].A));
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][1]].R));
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][1]].G));
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][1]].B));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][0]].A));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][1]].R));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][1]].G));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][1]].B));
        if(tessFace->is_rgba)
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][1]].A));
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][2]].R));
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][2]].G));
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][2]].B));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][1]].A));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][2]].R));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][2]].G));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][2]].B));
        if(tessFace->is_rgba)
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][2]].A));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][2]].A));
     }
@@ -1794,33 +1794,33 @@
        // first triangle
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][0]].R));
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][0]].G));
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][0]].B));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][0]].R));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][0]].G));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][0]].B));
        if(tessFace->is_rgba)
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][0]].A));
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][1]].R));
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][1]].G));
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][1]].B));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][0]].A));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][1]].R));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][1]].G));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][1]].B));
        if(tessFace->is_rgba)
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][1]].A));
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][3]].R));
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][3]].G));
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][3]].B));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][1]].A));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][3]].R));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][3]].G));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][3]].B));
        if(tessFace->is_rgba)
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][3]].A));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][3]].A));
        // second triangle
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][1]].R));
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][1]].G));
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][1]].B));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][1]].R));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][1]].G));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][1]].B));
        if(tessFace->is_rgba)
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][1]].A));
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][2]].R));
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][2]].G));
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][2]].B));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][1]].A));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][2]].R));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][2]].G));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][2]].B));
        if(tessFace->is_rgba)
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][2]].A));
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][3]].R));
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][3]].G));
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][3]].B));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][2]].A));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][3]].R));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][3]].G));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][3]].B));
        if(tessFace->is_rgba)
-       tessFace->rgba_vertices.push_back(byte(C[CI[i][3]].A));
+       tessFace->rgba_vertices.push_back(to_byte(C[CI[i][3]].A));
     }
@@ -1912,7 +1912,7 @@
     {
-       tess->rgba_vertices.push_back(byte(C[CI[i]].R));
-       tess->rgba_vertices.push_back(byte(C[CI[i]].G));
-       tess->rgba_vertices.push_back(byte(C[CI[i]].B));
+       tess->rgba_vertices.push_back(to_byte(C[CI[i]].R));
+       tess->rgba_vertices.push_back(to_byte(C[CI[i]].G));
+       tess->rgba_vertices.push_back(to_byte(C[CI[i]].B));
        if(tess->is_rgba)
-       tess->rgba_vertices.push_back(byte(C[CI[i]].A));
+       tess->rgba_vertices.push_back(to_byte(C[CI[i]].A));
     }