LI75091: MULTIPLE PRAGMA COMMENTS EXCEEDED LINKER LIMIT

October 2009 Update for XL C/C++ for Linux, V10.1
June 2011 Update for XL C/C++ for Linux, V10.1
XL C/C++ for Linux Fix Pack 8 (January 2014 Update) for 10.1
August 2010 Update for XL C/C++ for Linux, V10.1
January 2011 Update for XL C/C++ for Linux, V10.1
January 2012 Update for XL C/C++ for Linux, V10.1
July 2012 Update for XL C/C++ for Linux, V10.1

APAR status

• Closed as program error.

Error description

• The following perl script will generate a cpp file that contains
  6500 pragma comment strings with each 17 characters long.
  
  <perl>
  #!/usr/bin/perl -w
  
  use strict;
  
  open(COMMENT_SOURCE, ">comment.cpp");
  for(my $i=0; $i<6_500; ++$i) {
      print COMMENT_SOURCE qq{#pragma comment(user, "This is
  comment $i")\n};
  }
  print COMMENT_SOURCE <<MAIN;
  int main()
  {
      return 0;
  }
  MAIN
  </perl>
  
  The generated comment.cpp looks like this:
  
  #pragma comment(user, "This is comment 0")
  #pragma comment(user, "This is comment 1")
  .....
  
  int main() {return 0;}
  
  Once it's executed, building comment.cpp
  
  $xlC comment.cpp
  
  ld: 0711-950 ERROR: A name is too long.
          Names longer than 65535 characters are truncated.
          The name begins: This is comment 0This is comment 1This
  is com
  

Local fix

• N/A
  

Problem summary

• USER AFFECTED:
  Users of #pragma comment
  
  PROBLEM DESCRIPTION:
  
  "ld: 0711-950 ERROR: A name is too long.  Names longer than
  65535 characters are truncated. The name begins: This is comment
  0This is comment 1This is com"
  
  pragam comment user concatenates the strings together and in
  this case hit the limit for the size of a name for a single
  symbol.
  

Problem conclusion

• Create another comment symbol to handle the overflow,  i.e. made
  the compiler always generate linker acceptable symbols for any
  size name string
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  IZ52400

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  XL C/C++ RHEL52

• Fixed component ID

  5724U8310

Applicable component levels

• RA10 PSN IZ52400

     UP06/09/13