package/efivar: needs host gcc >= 4.8

The efivar code compiled for the host machine uses
__builtin_bswap16(), which is only available starting from gcc 4.8:

  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52624

So let's add a dependency on host gcc >= 4.8 to efivar and its unique
reverse dependency, efibootmgr.

Fixes:

  http://autobuild.buildroot.net/results/48ba906bb6f4dc0c8af43ec11be64f7168dd62fd/

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

package/efibootmgr/Config.in

@@ -4,6 +4,7 @@ config BR2_PACKAGE_EFIBOOTMGR
 	depends on !BR2_STATIC_LIBS # efivar
 	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12 # efivar
 	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 # efivar
+	depends on BR2_HOST_GCC_AT_LEAST_4_8 # efivar
 	depends on !BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_MIPS
 	select BR2_PACKAGE_EFIVAR
 	select BR2_PACKAGE_POPT
@@ -15,9 +16,10 @@ config BR2_PACKAGE_EFIBOOTMGR
 
 	  https://github.com/rhboot/efibootmgr
 
-comment "efibootmgr needs a glibc or uClibc toolchain w/ dynamic library, headers >= 3.12, gcc >= 4.9"
+comment "efibootmgr needs a glibc or uClibc toolchain w/ dynamic library, headers >= 3.12, gcc >= 4.9, host gcc >= 4.8"
 	depends on BR2_PACKAGE_EFIVAR_ARCH_SUPPORTS
 	depends on BR2_STATIC_LIBS || \
 		!BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12 || \
-		!BR2_TOOLCHAIN_GCC_AT_LEAST_4_9
+		!BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 || \
+		!BR2_HOST_GCC_AT_LEAST_4_8
 	depends on !BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_MIPS

package/efivar/Config.in

@@ -17,14 +17,17 @@ config BR2_PACKAGE_EFIVAR
 	# toolchains.
 	depends on !BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_MIPS
 	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_9
+	# needs __builtin_bswap16
+	depends on BR2_HOST_GCC_AT_LEAST_4_8
 	help
 	  Tools and libraries to manipulate EFI variables
 
 	  https://github.com/rhboot/efivar
 
-comment "efivar needs a toolchain w/ dynamic library, headers >= 3.12, gcc >= 4.9"
+comment "efivar needs a toolchain w/ dynamic library, headers >= 3.12, gcc >= 4.9, host gcc >= 4.8"
 	depends on BR2_PACKAGE_EFIVAR_ARCH_SUPPORTS
 	depends on BR2_STATIC_LIBS || \
 		!BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12 || \
-		!BR2_TOOLCHAIN_GCC_AT_LEAST_4_9
+		!BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 || \
+		!BR2_HOST_GCC_AT_LEAST_4_8
 	depends on !BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_MIPS