On Tue, Oct 07, 2014 at 12:47:04PM +0100, Iain Lane wrote:

> I think that with the change in
> 9c846a3f60213235e402d1367fea799421e5b82b, armhf was left out of the
> new list by mistake. We've had it enabled for some time both in
> Debian and Ubuntu and I'm not aware of any problems.

In the case of armel, there's at least this if we enable JIT:

libtool: compile:  arm-linux-gnueabi-g++ -DHAVE_CONFIG_H -I. -I.. -Wall -W 
-Wcast-align -Wchar-subscripts -Wreturn-type -Wformat -Wformat-security -Wn
o-format-y2k -Wundef -Wmissing-format-attribute -Wpointer-arith -Wwrite-strings 
-Wno-unused-parameter -Wno-parentheses -fno-exceptions -DBUILDING_CAIR
O__ -DBUILDING_GTK__ -DBUILDING_WEBKIT2__ -I../Source 
-I../Source/JavaScriptCore -I../Source/JavaScriptCore/API 
-I../Source/JavaScriptCore/ForwardingH
eaders -I../Source/JavaScriptCore/assembler -I../Source/JavaScriptCore/bindings 
-I../Source/JavaScriptCore/bytecode -I../Source/JavaScriptCore/bytecom
piler -I../Source/JavaScriptCore/debugger -I../Source/JavaScriptCore/dfg 
-I../Source/JavaScriptCore/disassembler -I../Source/JavaScriptCore/ftl -I../S
ource/JavaScriptCore/heap -I../Source/JavaScriptCore/inspector 
-I../Source/JavaScriptCore/inspector/agents 
-I../Source/JavaScriptCore/interpreter -I..
/Source/JavaScriptCore/jit -I../Source/JavaScriptCore/llint 
-I../Source/JavaScriptCore/parser -I../Source/JavaScriptCore/profiler 
-I../Source/JavaScri
ptCore/runtime -I../Source/JavaScriptCore/tools -I../Source/JavaScriptCore/yarr 
-I./DerivedSources/JavaScriptCore -I../Source/WTF -fno-omit-frame-poin
ter -fno-tree-dce -D_FORTIFY_SOURCE=2 -fno-rtti -pthread 
-I/usr/include/glib-2.0 -I/usr/lib/arm-linux-gnueabi/glib-2.0/include 
-I/usr/include -O2 -fst
ack-protector-strong -Wformat -Werror=format-security -Wall -pthread -std=c++11 
-Wno-c++11-compat -O2 -D_FORTIFY_SOURCE=2 -MT Source/JavaScriptCore/ll
int/libjavascriptcoregtk_3_0_la-LowLevelInterpreter.lo -MD -MP -MF 
Source/JavaScriptCore/llint/.deps/libjavascriptcoregtk_3_0_la-LowLevelInterpreter.T
po -c ../Source/JavaScriptCore/llint/LowLevelInterpreter.cpp  -fPIC -DPIC -o 
Source/JavaScriptCore/llint/.libs/libjavascriptcoregtk_3_0_la-LowLevelInterpreter.o
/tmp/ccnE2mJd.s: Assembler messages:
/tmp/ccnE2mJd.s:93: Error: selected processor does not support ARM mode `blx r0'
/tmp/ccnE2mJd.s:192: Error: selected processor does not support ARM mode `blx 
r4'
/tmp/ccnE2mJd.s:213: Error: selected processor does not support ARM mode `blx 
r0'
/tmp/ccnE2mJd.s:227: Error: selected processor does not support ARM mode `blx 
llint_entry_osr'
/tmp/ccnE2mJd.s:255: Error: selected processor does not support ARM mode `blx 
llint_entry_osr'
/tmp/ccnE2mJd.s:285: Error: selected processor does not support ARM mode `blx 
llint_entry_osr_function_for_call'
/tmp/ccnE2mJd.s:333: Error: selected processor does not support ARM mode `blx 
llint_stack_check'
/tmp/ccnE2mJd.s:355: Error: selected processor does not support ARM mode `blx 
llint_entry_osr_function_for_construct'
/tmp/ccnE2mJd.s:404: Error: selected processor does not support ARM mode `blx 
llint_stack_check'
/tmp/ccnE2mJd.s:426: Error: selected processor does not support ARM mode `blx 
llint_entry_osr_function_for_call_arityCheck'
/tmp/ccnE2mJd.s:447: Error: selected processor does not support ARM mode `blx 
slow_path_call_arityCheck'
/tmp/ccnE2mJd.s:501: Error: selected processor does not support ARM mode `blx 
llint_entry_osr_function_for_construct_arityCheck'
/tmp/ccnE2mJd.s:522: Error: selected processor does not support ARM mode `blx 
slow_path_construct_arityCheck'
[...]

https://wiki.debian.org/ArmEabiPort#Choice_of_minimum_CPU

"So Debian armel runs on a minimum CPU of ARMv4t and by default the
Debian armel GCC generates code for armv4t (rather than the usual
default ARM target of armv5t)."

So I guess we either disable JIT or drop support for armv4.

Berto


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