arch: remove Blackfin architecture

The Blackfin architecture has for a long time been complicated to
maintain, with poor support in upstream binutils/gcc. As of April
2018, the Blackfin architecture has been dropped from the upstream
Linux kernel. Also, the Analog Device engineer who used to be in touch
with the Buildroot community also privately said we should drop the
support for this architecture, which Analog Devices is no longer
using, promoting and maintaining.

The BR2_BINFMT_FLAT_SEP_DATA option becomes unselectable, it will be
removed in a future commit.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

diff --git a/Config.in.legacy b/Config.in.legacy
index 22e23433ea89b40a16d219a0745a337e776104f0..3d20950af57bd2760fc5d5085ed58c9bf8ceecb1 100644 (file)
--- a/Config.in.legacy
+++ b/Config.in.legacy
@@ -162,6 +162,14 @@ config BR2_PACKAGE_IQVLINUX
          See https://sourceforge.net/p/e1000/bugs/589/ for the
          discussion.
 
+config BR2_bfin
+       bool "Blackfin architecture support removed"
+       select BR2_LEGACY
+       help
+         Following the removal of Blackfin support for the upstream
+         Linux kernel, Buildroot has removed support for this CPU
+         architecture.
+
 config BR2_PACKAGE_KODI_ADSP_BASIC
        bool "kodi-adsp-basic package removed"
        select BR2_LEGACY

diff --git a/DEVELOPERS b/DEVELOPERS
index aa70ba5264989dfe465f85adcfc08f25cfa62026..eec278db500118ab907f68cdb9472d8de9a6177c 100644 (file)
--- a/DEVELOPERS
+++ b/DEVELOPERS
@@ -1950,7 +1950,6 @@ N:        Wade Berrier <wberrier@gmail.com>
 F:     package/ngrep/
 
 N:     Waldemar Brodkorb <wbx@openadk.org>
-F:     arch/Config.in.bfin
 F:     arch/Config.in.m68k
 F:     arch/Config.in.or1k
 F:     arch/Config.in.sparc

diff --git a/Makefile b/Makefile
index 3b846b997a8e8ebb765d7767753f41914fa3b3e3..54f940659cf5b0becda7426e0d52d681d892210c 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -429,7 +429,6 @@ KERNEL_ARCH := $(shell echo "$(ARCH)" | sed -e "s/-.*//" \
        -e s/arceb/arc/ \
        -e s/arm.*/arm/ -e s/sa110/arm/ \
        -e s/aarch64.*/arm64/ \
-       -e s/bfin/blackfin/ \
        -e s/or1k/openrisc/ \
        -e s/parisc64/parisc/ \
        -e s/powerpc64.*/powerpc/ \

diff --git a/arch/Config.in b/arch/Config.in
index 65448e9339a79db1082b00990c9251789a7caf09..a193cd00680df01a50c6dc364563e986e8e2732a 100644 (file)
--- a/arch/Config.in
+++ b/arch/Config.in
@@ -78,16 +78,6 @@ config BR2_aarch64_be
          http://www.arm.com/products/processors/instruction-set-architectures/armv8-architecture.php
          http://en.wikipedia.org/wiki/ARM
 
-config BR2_bfin
-       bool "Blackfin"
-       select BR2_ARCH_HAS_FDPIC_SUPPORT
-       select BR2_ARCH_NEEDS_GCC_AT_LEAST_6
-       help
-         The Blackfin is a family of 16 or 32-bit microprocessors
-         developed, manufactured and marketed by Analog Devices.
-         http://www.analog.com/
-         http://en.wikipedia.org/wiki/Blackfin
-
 config BR2_csky
        bool "csky"
        select BR2_ARCH_HAS_NO_TOOLCHAIN_BUILDROOT
@@ -400,14 +390,14 @@ config BR2_BINFMT_FLAT_SEP_DATA
        # big functions cannot be built in this mode. They cause build
        # failures such as "Tried to convert PC relative branch to
        # absolute jump" or "error: value -yyyyy out of range".
-       depends on BR2_bfin
+       depends on BR2_BROKEN
        help
          Allow for the data and text segments to be separated and
          placed in different regions of memory.
 
 config BR2_BINFMT_FLAT_SHARED
        bool "Shared binary"
-       depends on BR2_m68k || BR2_bfin
+       depends on BR2_m68k
        # Even though this really generates shared binaries, there is no libdl
        # and dlopen() cannot be used. So packages that require shared
        # libraries cannot be built. Therefore, we don't select
@@ -427,10 +417,6 @@ if BR2_arm || BR2_armeb || BR2_aarch64 || BR2_aarch64_be
 source "arch/Config.in.arm"
 endif
 
-if BR2_bfin
-source "arch/Config.in.bfin"
-endif
-
 if BR2_csky
 source "arch/Config.in.csky"
 endif

diff --git a/arch/Config.in.bfin b/arch/Config.in.bfin
deleted file mode 100644 (file)
index b570d38..0000000
--- a/arch/Config.in.bfin
+++ /dev/null
@@ -1,102 +0,0 @@
-choice
-       prompt "Target CPU"
-       default BR2_bf532
-       depends on BR2_bfin
-       help
-         Specify target CPU
-config BR2_bf512
-       bool "bf512"
-config BR2_bf514
-       bool "bf514"
-config BR2_bf516
-       bool "bf516"
-config BR2_bf518
-       bool "bf518"
-config BR2_bf522
-       bool "bf522"
-config BR2_bf523
-       bool "bf523"
-config BR2_bf524
-       bool "bf524"
-config BR2_bf525
-       bool "bf525"
-config BR2_bf526
-       bool "bf526"
-config BR2_bf527
-       bool "bf527"
-config BR2_bf531
-       bool "bf531"
-config BR2_bf532
-       bool "bf532"
-config BR2_bf533
-       bool "bf533"
-config BR2_bf534
-       bool "bf534"
-config BR2_bf536
-       bool "bf536"
-config BR2_bf537
-       bool "bf537"
-config BR2_bf538
-       bool "bf538"
-config BR2_bf539
-       bool "bf539"
-config BR2_bf542
-       bool "bf542"
-config BR2_bf544
-       bool "bf544"
-config BR2_bf547
-       bool "bf547"
-config BR2_bf548
-       bool "bf548"
-config BR2_bf549
-       bool "bf549"
-config BR2_bf561
-       bool "bf561"
-endchoice
-
-config BR2_ARCH
-       default "bfin"
-
-config BR2_ENDIAN
-       default "LITTLE"
-
-config BR2_GCC_TARGET_CPU
-       default bf606           if BR2_bf606
-       default bf607           if BR2_bf607
-       default bf608           if BR2_bf608
-       default bf609           if BR2_bf609
-       default bf512           if BR2_bf512
-       default bf514           if BR2_bf514
-       default bf516           if BR2_bf516
-       default bf518           if BR2_bf518
-       default bf522           if BR2_bf522
-       default bf523           if BR2_bf523
-       default bf524           if BR2_bf524
-       default bf525           if BR2_bf525
-       default bf526           if BR2_bf526
-       default bf527           if BR2_bf527
-       default bf531           if BR2_bf531
-       default bf532           if BR2_bf532
-       default bf533           if BR2_bf533
-       default bf534           if BR2_bf534
-       default bf536           if BR2_bf536
-       default bf537           if BR2_bf537
-       default bf538           if BR2_bf538
-       default bf539           if BR2_bf539
-       default bf542           if BR2_bf542
-       default bf544           if BR2_bf544
-       default bf547           if BR2_bf547
-       default bf548           if BR2_bf548
-       default bf549           if BR2_bf549
-       default bf561           if BR2_bf561
-
-config BR2_GCC_TARGET_CPU_REVISION
-       string "Target CPU revision"
-       help
-         Specify a target CPU revision, which will be appended to the
-         value of the -mcpu option. For example, if the selected CPU is
-         bf609, and then selected CPU revision is "0.0", then gcc will
-         receive the -mcpu=bf609-0.0 option.
-
-config BR2_READELF_ARCH_NAME
-       default "Analog Devices Blackfin"