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<p>I was able to compile my first hello world for esp32, however I
had to patch a few files so that compiling works for 4.0 / 4.1
Branch of esp-idf</p>
<p>Florian, can you please have a look at the patches and apply them
if they are OK?</p>
<p><font size="-1"><tt>diff --git a/compiler/systems/t_freertos.pas
b/compiler/systems/t_freertos.pas</tt><tt><br>
</tt><tt>index 3698f28dc1..a0788751ec 100644</tt><tt><br>
</tt><tt>--- a/compiler/systems/t_freertos.pas</tt><tt><br>
</tt><tt>+++ b/compiler/systems/t_freertos.pas</tt><tt><br>
</tt><tt>@@ -77,7 +77,7 @@ begin</tt><tt><br>
</tt><tt> if target_info.system=system_xtensa_freertos then</tt><tt><br>
</tt><tt> ExeCmd[1]:='ld -g '+platform_select+' $OPT
$DYNLINK $STATIC $GCSECTIONS $STRIP $MAP -L. -o $EXE -T $RES
'+</tt><tt><br>
</tt><tt> '-u call_user_start_cpu0 -u
ld_include_panic_highint_hdl -u esp_app_desc -u
vfs_include_syscalls_impl -u pthread_include_pthread_impl -u
pthread_include_pthread_cond_impl -u
pthread_include_pthread_local_storage_impl -u
newlib_include_locks_impl -u newlib_include_heap_impl -u
newlib_include_syscalls_impl -u newlib_include_pthread_impl -u
app_main -u uxTopUsedPriority '+</tt><tt><br>
</tt><tt>- '-L $IDF_PATH/components/esp_rom/esp32/ld -T
esp32.rom.newlib-funcs-time.ld '+</tt><tt><br>
</tt><tt>+ '-L $IDF_PATH/components/esp_rom/esp32/ld '+</tt><tt><br>
</tt><tt> '-T esp32.rom.ld -T esp32.rom.libgcc.ld -T
esp32.rom.newlib-data.ld -T esp32.rom.syscalls.ld -T
esp32.rom.newlib-funcs.ld '+</tt><tt><br>
</tt><tt> '-L . -T esp32_out.ld -T esp32.project.ld '+</tt><tt><br>
</tt><tt> '-L $IDF_PATH/components/esp32/ld -T
esp32.peripherals.ld'</tt><tt><br>
</tt><tt>@@ -1523,10 +1523,10 @@ begin</tt><tt><br>
</tt><tt> { generate linker maps for esp32 }</tt><tt><br>
</tt><tt> binstr:='$IDF_PATH/tools/ldgen/ldgen.py';</tt><tt><br>
</tt><tt> cmdstr:='--config sdkconfig --fragments
$IDF_PATH/components/xtensa/linker.lf
$IDF_PATH/components/soc/linker.lf
$IDF_PATH/components/esp_event/linker.lf '+</tt><tt><br>
</tt><tt>- '$IDF_PATH/components/spi_flash/linker.lf
$IDF_PATH/components/esp_wifi/linker.lf
$IDF_PATH/components/lwip/linker.lf
$IDF_PATH/components/log/linker.lf '+</tt><tt><br>
</tt><tt>+ '$IDF_PATH/components/spi_flash/linker.lf
$IDF_PATH/components/esp_wifi/linker.lf
$IDF_PATH/components/lwip/linker.lf '+</tt><tt><br>
</tt><tt> '$IDF_PATH/components/heap/linker.lf
$IDF_PATH/components/esp_ringbuf/linker.lf
$IDF_PATH/components/espcoredump/linker.lf
$IDF_PATH/components/esp32/linker.lf '+</tt><tt><br>
</tt><tt>
'$IDF_PATH/components/esp32/ld/esp32_fragments.lf
$IDF_PATH/components/freertos/linker.lf
$IDF_PATH/components/newlib/newlib.lf '+</tt><tt><br>
</tt><tt>- '$IDF_PATH/components/app_trace/linker.lf
$IDF_PATH/components/esp_gdbstub/linker.lf '+</tt><tt><br>
</tt><tt>+ '$IDF_PATH/components/esp_gdbstub/linker.lf '+</tt><tt><br>
</tt><tt> '--input
$IDF_PATH/components/esp32/ld/esp32.project.ld.in --output
./esp32.project.ld --kconfig $IDF_PATH/Kconfig --env-file
config.env '+</tt><tt><br>
</tt><tt> '--libraries-file ldgen_libraries --objdump
xtensa-esp32-elf-objdump';</tt><tt><br>
</tt><tt>
Replace(binstr,'$IDF_PATH',maybequoted(GetEnvironmentVariable('IDF_PATH')));</tt><tt><br>
</tt><tt><br>
</tt><tt>diff --git a/rtl/freertos/xtensa/esp32.pp
b/rtl/freertos/xtensa/esp32.pp</tt><tt><br>
</tt><tt>index 1bc9d3bcf9..e7070e082b 100644</tt><tt><br>
</tt><tt>--- a/rtl/freertos/xtensa/esp32.pp</tt><tt><br>
</tt><tt>+++ b/rtl/freertos/xtensa/esp32.pp</tt><tt><br>
</tt><tt>@@ -22,10 +22,10 @@ unit esp32;</tt><tt><br>
</tt><tt> {$linklib spi_flash,static}</tt><tt><br>
</tt><tt> {$linklib app_update,static}</tt><tt><br>
</tt><tt> {$linklib xtensa,static}</tt><tt><br>
</tt><tt>-{$linklib esp_timer,static}</tt><tt><br>
</tt><tt>+//{$linklib esp_timer,static}</tt><tt><br>
</tt><tt> {$linklib bootloader_support,static}</tt><tt><br>
</tt><tt> {$linklib pthread,static}</tt><tt><br>
</tt><tt>-{$linklib soc_esp32,static}</tt><tt><br>
</tt><tt>+//{$linklib soc_esp32,static}</tt><tt><br>
</tt><tt> {$linklib hal,static}</tt><tt><br>
</tt><tt> {$linklib c,static}</tt><tt><br>
</tt><tt> {$linklib esp_event,static}</tt></font></p>
<p><br>
</p>
<div class="moz-cite-prefix">Am 05.04.20 um 14:50 schrieb Michael
Ring via fpc-devel:<br>
</div>
<blockquote type="cite"
cite="mid:f0350eec-7842-a98b-5fa7-a2c7fc5ea200@michael-ring.org">Just
to be sure, from your Path settings it looks like you are using
esp-idf from the release/v4.0 Branch, correct?
<br>
<br>
Michael
<br>
<br>
Am 04.04.20 um 19:44 schrieb Florian Klämpfl:
<br>
<blockquote type="cite">Am 04.04.20 um 16:06 schrieb Christo
Crause via fpc-devel:
<br>
<blockquote type="cite">I'm keen to test the xtensa-freertos
target, but it seems there are a couple of patches missing
from trunk.
<br>
<br>
It is possible to build an xtensa cross compiler, but the make
files doesn't know the xtensa-freertos target. To get the make
files in rtl updated, one needs to rebuild fpcmake, edit
rtl/MakeFile.fpc and add "dirs_freertos=freertos" to the
target list, then run fpcmake. At this point the the following
make command proceeds up to sysutils:
<br>
make rtl FPC=~/fpc/3.3.1/compiler/ppcrossxtensa
CPU_TARGET=xtensa OS_TARGET=freertos
BINUTILSPREFIX=xtensa-esp32-elf-
<br>
<br>
where the following errors crop up:
<br>
syssbh.inc(43,41) Error: Identifier not found "Double"
<br>
syssbh.inc(49,41) Error: Identifier not found "Single" etc.
<br>
<br>
I trust someone (Florian...) has a working build?
<br>
<br>
</blockquote>
<br>
I sent Michael recently some instructions but I am not sure if
they are still working. As Pierre got qemu-xtensa working I am
pushing the linux port so we can test more easily the compiler.
<br>
<br>
- install esp-idf and execute
<br>
source ~/eps/esp-idf/export.sh
<br>
to get the pathes and environment set (namely tools path and
$IDF_PATH are needed)
<br>
- use the lazarus project fpc/compiler/ppcxtens.lpt to build an
xtensa compiler
<br>
- build the rtl (breaks currently at sysutils, doesn't matter):
<br>
cd rtl/freertos
<br>
make FPC=../../compiler/xtensa/pp OS_TARGET=freertos
"OPT=-Cplx6 -Cawindowed -XPxtensa-esp32-elf-" clean all
<br>
- build the example hello world program from the esp-idf, copy
all generated .a into e.g. ~/xtensa-esp32-elf-libs
<br>
- create somewhere a hello world program, compile it with
<br>
fpc/compiler/xtensa/pp -Fu../rtl/units/xtensa-freertos/
-Tfreertos -Cawindowed -XPxtensa-esp32-elf- -al -O3 -Wpesp32
-Fl~/xtensa-esp32-elf-libs
-Fl$HOME/.espressif/tools/xtensa-esp32-elf/esp-2019r2-8.2.0/xtensa-esp32-elf/xtensa-esp32-elf/lib/
hello
<br>
- get partition-table.bin and bootloader.bin from the
hello_world example compiled above and copy them into the same
dir as the compiled hello.bin
<br>
- flash with
<br>
esptool.py -p /dev/ttyUSB0 -b 460800 --before default_reset
--after hard_reset --chip esp32 write_flash --flash_mode dio
--flash_size detect --flash_freq 40m 0x1000 bootloader.bin
0x8000 partition-table.bin 0x10000 hello.bin
<br>
- monitor the output with:
<br>
idf_monitor.py --port /dev/ttyUSB0 hello.elf
<br>
<br>
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<br>
</blockquote>
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