newlib: iconv: autogenerate iconv define list

The list of iconv to/from defines is hand maintained in newlib.hin.
Lets leverage mkdeps.pl to generate this list automatically from the
list of known encodings.  The newlib.hin list is up-to-date, so the
list in iconv.m4 matches the list already generated.

1 files changed, 39 insertions, 0 deletions

diff --git a/newlib/libc/iconv/ces/mkdeps.pl b/newlib/libc/iconv/ces/mkdeps.pl
index 4e648694a..b279fd4e8 100755
--- a/newlib/libc/iconv/ces/mkdeps.pl
+++ b/newlib/libc/iconv/ces/mkdeps.pl
@@ -334,6 +334,9 @@ sub process_section_encodings($)
   # Generate ccsnames.h header file
   generate_ccsnames_h (\%ccsenc);
 
+  # Generate iconv.m4 file
+  my @encodings = sort keys %encalias;
+  generate_iconv_m4 (\@encodings);
 }
 
 # ==============================================================================
@@ -928,3 +931,39 @@ sub generate_ccsnames_h($)
   print CCSNAMES_H "\n#endif /* !__CCSNAMES_H__ */\n\n";
   close CCSNAMES_H or err "Error while closing ../ccs/ccsnames.h file.";
 }
+
+# ==============================================================================
+#
+# Generate iconv.m4 file.
+#
+# Parameter 1 (input): array reference with encoding names
+#
+# ==============================================================================
+sub generate_iconv_m4($)
+{
+  my @encodings = @{$_[0]};
+
+  print "Debug: create \"../../../iconv.m4\" file.\n" if $verbose;
+  open (ICONV_M4, '>', "../../../iconv.m4")
+  or err "Can't create \"../../../iconv.m4\" file for writing.\nSystem error message: $!.\n";
+
+  print ICONV_M4 "$comment_automatic\n";
+  print ICONV_M4 "AC_DEFUN([NEWLIB_ICONV_DEFINES],[dnl\n";
+  foreach my $encoding (@encodings)
+  {
+    my $ucencoding = uc $encoding;
+
+    my $tovar = "_ICONV_TO_ENCODING_$ucencoding";
+    print ICONV_M4 "  if test \"\$$tovar\" = 1; then\n";
+    print ICONV_M4 "    AC_DEFINE($tovar, 1, [Support $encoding output encoding.])\n";
+    print ICONV_M4 "  fi\n";
+
+    my $fromvar = "_ICONV_FROM_ENCODING_$ucencoding";
+    print ICONV_M4 "  if test \"\$$fromvar\" = 1; then\n";
+    print ICONV_M4 "    AC_DEFINE($fromvar, 1, [Support $encoding input encoding.])\n";
+    print ICONV_M4 "  fi\n";
+  }
+  print ICONV_M4 "])\n";
+
+  close ICONV_M4 or err "Error while closing ../../../iconv.m4 file.";
+}