[gspell] build: fix compilation on Mac OS X

[Sébastien Wilmet <swilmet src gnome org>]

commit 09bf18a4d225be0613d59834d260f619c310fb03
Author: Tom Schoonjans <Tom Schoonjans diamond ac uk>
Date:   Sun Jan 31 15:10:36 2016 +0530

    build: fix compilation on Mac OS X
    
    Ensures that all files are treated as Objective-C source code.

 gspell/Makefile.am |   20 ++++++++------------
 1 files changed, 8 insertions(+), 12 deletions(-)
---
diff --git a/gspell/Makefile.am b/gspell/Makefile.am
index c9a7d7e..72547a6 100644
--- a/gspell/Makefile.am
+++ b/gspell/Makefile.am
@@ -84,23 +84,19 @@ gspell-resources.c: $(xml_res) $(shell $(GLIB_COMPILE_RESOURCES) --sourcedir=$(s
 
 CLEANFILES = $(BUILT_SOURCES)
 
-# Mac OSX convenience library and ldflags
 if OS_OSX
-noinst_LTLIBRARIES = libosx.la
+libgspell_1_la_LDFLAGS += \
+       -framework Cocoa
 
-libosx_la_LDFLAGS =            \
-       -framework Cocoa        \
-       $(GTK_MAC_LIBS)
-
-libosx_la_CFLAGS =             \
-       -xobjective-c           \
-       $(GTK_MAC_CFLAGS)
+libgspell_1_la_CFLAGS = \
+       -xobjective-c
 
-libosx_la_SOURCES =    \
-       gspell-osx.c    \
+gspell_private_headers += \
        gspell-osx.h
 
-libgspell_1_la_LIBADD += libosx.la
+gspell_private_c_files += \
+       gspell-osx.c
+
 endif # OS_OSX
 
 if HAVE_INTROSPECTION