GNU bug report logs - #19507
configure --with-ns fails on Fedora 21 in AppKit.h test

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Paul Eggert <eggert <at> cs.ucla.edu>
Subject: bug#19507: closed (Re: configure --with-ns fails on Fedora 21 in
 AppKit.h test)
Date: Sun, 25 Jan 2015 02:24:03 +0000

[Message part 1 (text/plain, inline)]

Your bug report

#19507: configure --with-ns fails on Fedora 21 in AppKit.h test

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 19507 <at> debbugs.gnu.org.

-- 
19507: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=19507
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: 19507-done <at> debbugs.gnu.org
Subject: Re: configure --with-ns fails on Fedora 21 in AppKit.h test
Date: Sat, 24 Jan 2015 18:22:58 -0800

[Message part 3 (text/plain, inline)]

I ported that patch from Fedora 21 to Ubuntu 14.10, installed the attached 
revised patch, and am marking this as done.

[0001-Use-gnustep-config-if-available.patch (text/x-patch, attachment)]

[Message part 5 (message/rfc822, inline)]

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Emacs bug reports and feature requests <bug-gnu-emacs <at> gnu.org>
Subject: configure --with-ns fails on Fedora 21 in AppKit.h test
Date: Sun, 04 Jan 2015 11:24:08 -0800

On Fedora 21 x86-64 I configured the current Emacs master (commit
cde73794f61fec2a5a8676c2e36ec6634e72cdc5) using "./configure --with-ns",
and this failed as follows:

  checking AppKit/AppKit.h usability... no
  checking AppKit/AppKit.h presence... yes
  configure: WARNING: AppKit/AppKit.h: present but cannot be compiled
  configure: WARNING: AppKit/AppKit.h:     check for missing prerequisite headers?
  configure: WARNING: AppKit/AppKit.h: see the Autoconf documentation
  configure: WARNING: AppKit/AppKit.h:     section "Present But Cannot Be Compiled"
  configure: WARNING: AppKit/AppKit.h: proceeding with the compiler's result
  configure: WARNING:     ## ------------------------------------ ##
  configure: WARNING:     ## Report this to bug-gnu-emacs <at> gnu.org ##
  configure: WARNING:     ## ------------------------------------ ##
  checking for AppKit/AppKit.h... no
  configure: error: `--with-ns' was specified, but the include
    files are missing or cannot be compiled.

Config.log says this (/usr/local/include is an empty directory, I'm running with 
pretty much vanilla Fedora 21):

  configure:10522: checking AppKit/AppKit.h usability
  configure:10522: gcc -std=gnu99 -c -g3 -O2 -x objective-c -I/usr/include 
-I/usr/local/include -fobjc-exceptions    -x objective-c -I/usr/include 
-I/usr/local/include conftest.c >&5
  In file included from /usr/include/AppKit/NSPanel.h:34:0,
		   from /usr/include/AppKit/NSColorPanel.h:39,
		   from /usr/include/AppKit/AppKit.h:63,
		   from conftest.c:107:
  /usr/include/AppKit/NSWindow.h:876:1: error: cannot find protocol declaration 
for 'NSWindowDelegate'
   @interface NSObject (NSWindowDelegateAdditions) <NSWindowDelegate>
   ^
  configure:10522: $? = 1
  configure: failed program was:
  | /* confdefs.h */
  | #define PACKAGE_NAME "GNU Emacs"
  | #define PACKAGE_TARNAME "emacs"
  | #define PACKAGE_VERSION "25.0.50"
  | ...
  | #include <AppKit/AppKit.h>

/usr/include/AppKit/NSWindow.h says this:

  #ifdef GNUSTEP

  @protocol NSWindowDelegate <NSObject>
  #ifdef __OBJC2__
  @optional
  #else
  @end
  @interface NSObject (NSWindowDelegate)
  #endif
  ...
  #endif

Apparently GNUSTEP must be defined by the application?  If I configure
this way:

  ./configure --with-ns CFLAGS='-g3 -O2 -DGNUSTEP'

the above problem goes away, but the builder shouldn't have to
configure CFLAGS by hand.

Have recent releases of GnuStep changed with respect to whether the application 
must define the GNUSTEP macro?  Fedora 21 is using gnustep-gui-devel-0.24.0-1; 
you can find out more about its status at:

https://apps.fedoraproject.org/packages/gnustep-gui-devel/

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