[libslab] Hack the build system so that people can easily use internal copies

[Vincent Untz <vuntz src gnome org>]

commit aee86331c44e6fbd101146c9285db7e15d6f7791
Author: Vincent Untz <vuntz gnome org>
Date:   Tue Aug 11 11:47:38 2009 +0200

    Hack the build system so that people can easily use internal copies
    
    The internal copies won't install a system library or headers.

 configure.ac        |    8 +++++---
 libslab/Makefile.am |    6 ++++++
 2 files changed, 11 insertions(+), 3 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index cb3b60f..e2e80db 100644
--- a/configure.ac
+++ b/configure.ac
@@ -96,9 +96,11 @@ ac_cv_lkstrftime=yes
 ])
 AC_MSG_RESULT($ac_cv_lkstrftime)
 
-dnl ==============================================
-dnl End: strftime
-dnl ==============================================
+dnl ===============================================
+dnl Enable internal copies of libslab, but not here
+dnl ===============================================
+
+AM_CONDITIONAL(LIBSLAB_FOR_INTERNAL_USE, test "yes" = "no")
 
 AC_CONFIG_FILES([
 Makefile
diff --git a/libslab/Makefile.am b/libslab/Makefile.am
index d2ffe6a..771e840 100644
--- a/libslab/Makefile.am
+++ b/libslab/Makefile.am
@@ -26,7 +26,11 @@ HEADER_FILES=					\
 	system-tile.h				\
 	tile.h
 
+if !LIBSLAB_FOR_INTERNAL_USE
 lib_LTLIBRARIES = libslab.la
+else
+noinst_LTLIBRARIES = libslab.la
+endif
 
 libslab_la_SOURCES =				\
 	$(MARSHAL_GENERATED)			\
@@ -53,10 +57,12 @@ libslab_la_SOURCES =				\
 	tile-action.c				\
 	tile.c
 
+if !LIBSLAB_FOR_INTERNAL_USE
 libslab_includedir = $(includedir)/libslab
 libslab_include_HEADERS = $(HEADER_FILES)
 
 libslab_la_LDFLAGS = -version-info $(LT_VERSION)
+endif
 
 libslab_la_LIBADD = $(LIBSLAB_LIBS)