cppcms: needs NPTL support

cppcms uses some thread functions that are not available in certain
uClibc thread implementations. Even though a bit more restrictive than
necessary, adding a NPTL dependency is the easiest solution, and is
quite logical for a relatively large and complex package such as
cppcms.

Fixes:

  http://autobuild.buildroot.net/results/a26/a26574419aacbea4140dfca1d503bcab599edd71/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/cppcms/Config.in

@@ -4,7 +4,7 @@ config BR2_PACKAGE_CPPCMS
 	select BR2_PACKAGE_PCRE
 	select BR2_PACKAGE_LIBGCRYPT
 	depends on BR2_INSTALL_LIBSTDCPP
-	depends on BR2_TOOLCHAIN_HAS_THREADS
+	depends on BR2_TOOLCHAIN_HAS_THREADS_NPTL
 	depends on !BR2_PREFER_STATIC_LIB # dlopen()
 	help
 	  CppCMS is a Free High Performance Web Development Framework
@@ -39,6 +39,6 @@ comment "icu support needs a toolchain w/ wchar"
 
 endif
 
-comment "cppcms needs a toolchain w/ C++, threads, dynamic library"
-	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS || \
+comment "cppcms needs a toolchain w/ C++, NPTL, dynamic library"
+	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS_NPTL || \
 		BR2_PREFER_STATIC_LIB