package/llvm: add dependency on wchar

Extract from log:

output/build/llvm-5.0.1/include/llvm/Support/ConvertUTF.h:203:53:
error: ‘std::wstring’ has not been declared
bool ConvertUTF8toWide(llvm::StringRef Source, std::wstring &Result);

Also propagate dependency to mesa3d

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

package/llvm/Config.in

@@ -20,6 +20,7 @@ config BR2_PACKAGE_LLVM
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on !BR2_TOOLCHAIN_HAS_GCC_BUG_64735 # std::shared_future
 	depends on !BR2_STATIC_LIBS
+	depends on BR2_USE_WCHAR # std::wstring
 	help
 	  The LLVM Project is a collection of modular and reusable
 	  compiler and toolchain technologies.
@@ -36,11 +37,11 @@ config BR2_PACKAGE_LLVM_AMDGPU
 
 endif
 
-comment "llvm needs a toolchain w/ threads, C++, gcc >= 4.8, host gcc >= 4.8, dynamic library"
+comment "llvm needs a toolchain w/ wchar, 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_STATIC_LIBS
+		|| BR2_STATIC_LIBS || !BR2_USE_WCHAR
 
 comment "llvm needs a toolchain not affected by GCC bug 64735"
 	depends on BR2_PACKAGE_LLVM_ARCH_SUPPORTS

package/mesa3d/Config.in

@@ -34,13 +34,14 @@ config BR2_PACKAGE_MESA3D_LLVM
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on !BR2_TOOLCHAIN_HAS_GCC_BUG_64735 # std::shared_future
 	depends on !BR2_STATIC_LIBS
+	depends on BR2_USE_WCHAR # std::wstring
 	select BR2_PACKAGE_LLVM
 
-comment "llvm support needs a toolchain w/ threads, C++, gcc >= 4.8, host gcc >= 4.8, dynamic library"
+comment "llvm support needs a toolchain w/ wchar, 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_STATIC_LIBS
+		|| BR2_STATIC_LIBS || !BR2_USE_WCHAR
 
 comment "llvm support needs a toolchain not affected by GCC bug 64735"
 	depends on BR2_PACKAGE_LLVM_ARCH_SUPPORTS