efivar: not available for static builds

efivar uses dlfcn.h which is not available in static builds
configuration. Also propagate dependency to efibootmgr. This commit
also does s/requires/needs/ in comment while at it.

Fixes:
  http://autobuild.buildroot.net/results/ab3/ab32ccacfac2e65e1fcb307058d06c3d0122979d/

Signed-off-by: Rahul Bedarkar <rahul.bedarkar@imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/efibootmgr/Config.in

@@ -1,5 +1,6 @@
 config BR2_PACKAGE_EFIBOOTMGR
 	bool "efibootmgr"
+	depends on !BR2_STATIC_LIBS # efivar
 	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12 # efivar
 	depends on !BR2_TOOLCHAIN_USES_MUSL # efivar
 	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 # efivar
@@ -15,8 +16,9 @@ config BR2_PACKAGE_EFIBOOTMGR
 
 	  https://github.com/rhinstaller/efibootmgr
 
-comment "efibootmgr requires a glibc or uClibc toolchain w/ headers >= 3.12, gcc >= 4.9"
-	depends on !BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12 || \
+comment "efibootmgr needs a glibc or uClibc toolchain w/ dynamic library, headers >= 3.12, gcc >= 4.9"
+	depends on BR2_STATIC_LIBS || \
+		!BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12 || \
 		BR2_TOOLCHAIN_USES_MUSL || \
 		!BR2_TOOLCHAIN_GCC_AT_LEAST_4_9
 	depends on !BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_MIPS && \

package/efivar/Config.in

@@ -1,5 +1,6 @@
 config BR2_PACKAGE_EFIVAR
 	bool "efivar"
+	depends on !BR2_STATIC_LIBS # dlfcn.h
 	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12 # linux/nvme.h
 	# linux/nvme.h has been renamed to linux/nvme_ioctl.h since 4.4,
 	# and the efivar source handles that situation. However, some
@@ -18,8 +19,9 @@ config BR2_PACKAGE_EFIVAR
 
 	  https://github.com/rhinstaller/efivar
 
-comment "efivar requires a glibc or uClibc toolchain w/ headers >= 3.12, gcc >= 4.9"
-	depends on !BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12 || \
+comment "efivar needs a glibc or uClibc toolchain w/ dynamic library, headers >= 3.12, gcc >= 4.9"
+	depends on BR2_STATIC_LIBS || \
+		!BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12 || \
 		BR2_TOOLCHAIN_USES_MUSL || \
 		!BR2_TOOLCHAIN_GCC_AT_LEAST_4_9
 	depends on !BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_MIPS && \