package/llvm: add dependency on shared libraries

llvm generates libLLVM.so, so it won't work if BR2_STATIC_LIBS is set

Also propagate llvm dependency to mesa3d.

Link to report from autobuilders:
http://lists.busybox.net/pipermail/buildroot/2018-April/218296.html

Signed-off-by: Valentin Korenblit <valentin.korenblit@smile.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/llvm/Config.in

@@ -19,6 +19,7 @@ config BR2_PACKAGE_LLVM
 	depends on BR2_TOOLCHAIN_HAS_THREADS
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on !BR2_TOOLCHAIN_HAS_GCC_BUG_64735 # std::shared_future
+	depends on !BR2_STATIC_LIBS
 	help
 	  The LLVM Project is a collection of modular and reusable
 	  compiler and toolchain technologies.
@@ -35,10 +36,11 @@ config BR2_PACKAGE_LLVM_AMDGPU
 
 endif
 
-comment "llvm needs a toolchain w/ threads, C++, gcc >= 4.8, host gcc >= 4.8"
+comment "llvm needs a toolchain w/ threads, C++, gcc >= 4.8, host gcc >= 4.8, dynamic library"
 	depends on BR2_PACKAGE_LLVM_ARCH_SUPPORTS
 	depends on !BR2_TOOLCHAIN_HAS_THREADS || !BR2_INSTALL_LIBSTDCPP || \
-		!BR2_HOST_GCC_AT_LEAST_4_8 || !BR2_TOOLCHAIN_GCC_AT_LEAST_4_8
+		!BR2_HOST_GCC_AT_LEAST_4_8 || !BR2_TOOLCHAIN_GCC_AT_LEAST_4_8 \
+		|| BR2_STATIC_LIBS
 
 comment "llvm needs a toolchain not affected by GCC bug 64735"
 	depends on BR2_PACKAGE_LLVM_ARCH_SUPPORTS

package/mesa3d/Config.in

@@ -33,12 +33,14 @@ config BR2_PACKAGE_MESA3D_LLVM
 	depends on BR2_TOOLCHAIN_HAS_THREADS
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on !BR2_TOOLCHAIN_HAS_GCC_BUG_64735 # std::shared_future
+	depends on !BR2_STATIC_LIBS
 	select BR2_PACKAGE_LLVM
 
-comment "llvm support needs a toolchain w/ threads, C++, gcc >= 4.8, host gcc >= 4.8"
+comment "llvm support needs a toolchain w/ threads, C++, gcc >= 4.8, host gcc >= 4.8, dynamic library"
 	depends on BR2_PACKAGE_LLVM_ARCH_SUPPORTS
 	depends on !BR2_TOOLCHAIN_HAS_THREADS || !BR2_INSTALL_LIBSTDCPP || \
-		!BR2_HOST_GCC_AT_LEAST_4_8 || !BR2_TOOLCHAIN_GCC_AT_LEAST_4_8
+		!BR2_HOST_GCC_AT_LEAST_4_8 || !BR2_TOOLCHAIN_GCC_AT_LEAST_4_8 \
+		|| BR2_STATIC_LIBS
 
 comment "llvm support needs a toolchain not affected by GCC bug 64735"
 	depends on BR2_PACKAGE_LLVM_ARCH_SUPPORTS