Bug 670270

Summary:	Compilation failure due to known/unfixed bug
Product:	Red Hat Enterprise Linux 6	Reporter:	brett
Component:	libpng	Assignee:	Tom Lane <tgl>
Status:	CLOSED NOTABUG	QA Contact:	BaseOS QE - Apps <qe-baseos-apps>
Severity:	medium	Docs Contact:
Priority:	low
Version:	6.0	CC:	brett, hhorak
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-01-17 18:34:04 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description brett 2011-01-17 18:22:34 UTC

When compiling against libpng12, an error is thrown:

pngconf.h __dont__ does not name a type


This is known in Ubuntu and other OS's:
https://bugs.launchpad.net/ubuntu/+source/libpng/+bug/218409


The patch is as given in the above (/usr/include/libpng12/pngconf.h):

--- libpng12/pngconf.h
+++ libpng12/pngconf.h
@@ -323,8 +323,8 @@
      /* If you encounter a compiler error here, see the explanation
       * near the end of INSTALL.
       */
- __pngconf.h__ already includes setjmp.h;
- __dont__ include it again.;
+#warning __pngconf.h__ already includes setjmp.h;
+#warning __dont__ include it again.;
 # endif
 # endif /* __linux__ */

Comment 2 Tom Lane 2011-01-17 18:34:04 UTC

This is not a bug.  libpng will not work correctly if you include <setjmp.h> in the wrong place, and that syntax error is trying to ensure that you don't end up with a malfunctioning program.  Downgrading it to a warning would not be an improvement.

Comment 3 brett 2011-01-17 18:54:20 UTC

Thanks for the info. I ran into this porting MySQL Gui Tools to RHEL-6. I've fixed most of the other issues, but ran into that one, googled, and patched as indicated. I appreciate the response.