add SPDX identifiers

Signed-off-by: Steffen Jaeckel <[email protected]>

Author: sjaeckel

CMakeLists.txt

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: Unlicense
 #
 # LibTomMath, a free open source portable number theoretic multiple-precision
 # integer (MPI) library written entirely in C.

helper.pl

@@ -223,7 +223,10 @@ sub patch_file {
 
 sub make_sources_cmake {
   my @list = @_;
-  my $output = "set(SOURCES\n";
+  my $output = "# SPDX-License-Identifier: Unlicense
+# Autogenerated File! Do not edit.
+
+set(SOURCES\n";
   foreach my $obj (sort @list) {
     $output .= $obj . "\n";
   }

sources.cmake

@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: Unlicense
+# Autogenerated File! Do not edit.
+
 set(SOURCES
 mp_2expt.c
 mp_abs.c