I have found a way out. You need to add 'CROSSOPT=-Cpcortexm3' at the end of the line:-
make clean buildbase installbase CROSSINSTALL=1 OS_TARGET=embedded CPU_TARGET=arm SUBARCH=armv7m in the wiki page. Then the rtl builds in thumb2. Geoffrey On 21 Dec 2011, at 10:55, Geoffrey Barton wrote: > > On 21 Dec 2011, at 10:43, fpc-devel-requ...@lists.freepascal.org wrote: >> From: Jeppe Græsdal Johansen <jjoha...@student.aau.dk> >> Subject: Re: [fpc-devel] arm embedded on 2.6.0rc1 >> Date: 20 December 2011 21:20:07 GMT >> To: FPC developers' list <fpc-devel@lists.freepascal.org> >> Reply-To: FPC developers' list <fpc-devel@lists.freepascal.org> >> >> >> Den 20-12-2011 21:51, Geoffrey Barton skrev: >>> I have been trying to cross-compile arm embedded for a cortexm3 using >>> 2.6.0rc1. I had this working previously with 2.4.0 and stellaris >>> controllers. >>> >>> Following the instructions on the wiki page 'TARGET_Embedded' and adding >>> suitable devices into cpuinfo etc. where they have been missed out, I can >>> build a test program. However disassembling the resulting elf file shows >>> the sections system_fpc_cpuuint, system_sysinitfpu, fpc_initializeunits, >>> fpc_initializeunitsetc, system_internalexit, fpc_do_exit, >>> system_system_exit and init$_system to be 32 bit arm code not thumb2. The >>> rest of the program, including the stellaris.pp code, are correct thumb2 >>> code. >>> >>> It appears the armv7m subarch is not being acted on when compiling rtl? I >>> got the same result if I substituted cortexm3 for this too. >>> >>> Geoffrey >>> >>> >>> _______________________________________________ >>> fpc-devel maillist - fpc-devel@lists.freepascal.org >>> http://lists.freepascal.org/mailman/listinfo/fpc-devel >> Do you have an example of how you can see it is 32 bit arm code and not >> thumb2? > > previously:- > > 00005cf4 <SYSTEM_FPC_CPUINIT>: > 5cf4: 46ec mov ip, sp > 5cf6: e92d 4800 stmdb sp!, {fp, lr} > 5cfa: 46e3 mov fp, ip > 5cfc: b08a sub sp, #40 > 5cfe: f000 f803 bl 5d08 <SYSTEM_SYSINITFPU> > 5d02: 46dd mov sp, fp > 5d04: e91d 8800 ldmdb sp, {fp, pc} > > now:- > > 00005d88 <SYSTEM_FPC_CPUINIT>: > 5d88: e92d4000 push {lr} > 5d8c: e24dd004 sub sp, sp, #4 > 5d90: e59f0010 ldr r0, [pc, #16] ; 5da8 > <SYSTEM_FPC_CPUINIT+0x20> > 5d94: e5d00000 ldrb r0, [r0] > 5d98: e3500000 cmp r0, #0 > 5d9c: 0b000002 bleq 5dac <SYSTEM_SYSINITFPU> > 5da0: e28dd004 add sp, sp, #4 > 5da4: e8bd8000 pop {pc} > 5da8: 20000018 andcs r0, r0, r8, lsl r0
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