package/elf2flt: Remove Config.in.host

There is no need to have configuration files direbtly set the
BR2_PACKAGE_HOST_ELF2FLT option. The need for the elf2flt utility is
automatically determined by gcc build in package/gcc/gcc.mk according to
the BR2_BINFMT_FLAT option.

Accordingly, we can remove the file package/elf2flt/Config.in.host to
get rid of the BR2_PACKAGE_HOST_ELF2FLT option. BR2_STRIP_strip
dependency on this option is replaced with a dependency on
BR2_BINFMT_ELF.

To stay consistent with the fact that elf2flt supports only the arm, sh,
sparc, xtensa and riscv-64 architectures, a dependency on these
architectures is added to the BR2_BINFMT_FLAT option in arch/Config.in.

Board configuration files setting the BR2_PACKAGE_HOST_ELF2FLT option
are also updated.

Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

Config.in

@@ -432,7 +432,7 @@ config BR2_ENABLE_RUNTIME_DEBUG
 config BR2_STRIP_strip
 	bool "strip target binaries"
 	default y
-	depends on !BR2_PACKAGE_HOST_ELF2FLT
+	depends on BR2_BINFMT_ELF
 	help
 	  Binaries and libraries in the target filesystem will be
 	  stripped using the normal 'strip' command. This allows to save

arch/Config.in

@@ -384,6 +384,7 @@ config BR2_BINFMT_ELF
 
 config BR2_BINFMT_FLAT
 	bool "FLAT"
+	depends on BR2_arm || BR2_sh || BR2_sparc || BR2_xtensa || BR2_RISCV_64
 	depends on !BR2_USE_MMU
 	help
 	  FLAT binary is a relatively simple and lightweight executable

configs/qemu_riscv64_nommu_virt_defconfig

@@ -6,7 +6,6 @@ BR2_RISCV_64=y
 BR2_GLOBAL_PATCH_DIR="board/riscv/nommu/patches"
 
 # Toolchain
-BR2_PACKAGE_HOST_ELF2FLT=y
 # BR2_USE_MMU is not set
 
 # Busybox with hush

configs/qemu_xtensa_lx60_nommu_defconfig

@@ -4,7 +4,6 @@ BR2_XTENSA_CUSTOM=y
 BR2_XTENSA_OVERLAY_FILE="https://github.com/jcmvbkbc/xtensa-toolchain-build/raw/95291b7c39e6f790d0b2f062c945a630290f2c81/overlays/xtensa_dc233c.tar.gz"
 
 # Toolchain
-BR2_PACKAGE_HOST_ELF2FLT=y
 # BR2_USE_MMU is not set
 
 # Use minimal busybox with hush and networking tools

package/elf2flt/Config.in.host

@@ -1,13 +0,0 @@
-config BR2_PACKAGE_HOST_ELF2FLT
-	bool "Enable elf2flt support?"
-	depends on BR2_arm || BR2_sh || BR2_sparc || BR2_xtensa || BR2_RISCV_64
-	depends on !BR2_USE_MMU
-	help
-	  uCLinux uses a Binary Flat format commonly known as BFLT. It
-	  is a relatively simple and lightweight executable format
-	  based on the original a.out format.
-
-	  This option compiles the required tools and makes the required
-	  modifications on your toolchain (linker).
-
-	  https://github.com/uclinux-dev/elf2flt

toolchain/toolchain-buildroot/Config.in

@@ -89,5 +89,4 @@ source "package/uclibc/Config.in"
 source "package/glibc/Config.in"
 source "package/binutils/Config.in.host"
 source "package/gcc/Config.in.host"
-source "package/elf2flt/Config.in.host"
 endif