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jcmvbkbc / crosstool-NG

crosstool-NG with support for Xtensa
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Support for later levels of GCC #19

Open nkolban opened 8 years ago

nkolban commented 8 years ago

I see that the version of GCC built is 4.8.2. I see that the latest version of GCC is 5.2 and am wondering if there are plans to update?

jcmvbkbc commented 8 years ago

It's been updated: the branch lx106-g++-1.21.0 offers gcc-5.1 by default, here's the announcement: http://www.esp8266.com/viewtopic.php?f=9&t=224&start=155#p19771 But it seems that not a lot of people picked it up. So I left 4.8.x as default in xtensa-1.22.x branch, but whoever needs that still can do 'ct-ng menuconfig' after the 'ct-ng xtensa-lx106-elf' and select gcc-5.x.

maruno commented 8 years ago

Is compiling GCC 5.2 supported? From the xtensa-1.22.x-branch I can't select GCC 5.1, and GCC 5.2 seems to fail to compile here for me: https://gist.github.com/maruno/64e33793c46fc84480169ccd01bbcd10

jcmvbkbc commented 8 years ago

unwind-dw2-fde-dip.c:36:40: fatal error: elf.h: No such file or directory

I believe your system is missing libc development package. On ubuntu/debian it should be fixed with apt-get install build-essential

maruno commented 8 years ago

I'm not running Linux, but trying to build this on FreeBSD. Shouldn't elf.h be found in the target system headers? Adding the system headers to the last command doesn't seem to work too well.

I updated my gist with the full build.log.

maruno commented 8 years ago

Adding -isystem /storage/tooling/crosstool-NG/bin/.build/src/gcc-5.2.0/gcc/config/xtensa to the last command seems to let it run, maybe a missing include directory?

jcmvbkbc commented 8 years ago

Reading unwind-dw2-fde-dip.c I see the following:

#if !defined(inhibit_libc) && !defined(__OpenBSD__)
#include <elf.h>        /* Get DT_CONFIG.  */
#endif

which makes me think, that something like && !defined(__FreeBSD__) may be missing here.

jcmvbkbc commented 8 years ago

OK, reading it a bit further I realize that the compiler thinks that it builds the unwinding library for FreeBSD running on esp8266. At that point I'd say that this is gcc issue and this type of configuration is not actually supported by gcc.

igrr commented 7 years ago

Getting this issue on macOS as well. Shouldn't this unwinding code be only added to libgcc build if it is being built for linux target?

jcmvbkbc commented 7 years ago

Now I'm getting the same error when building esp32 toolchain, but not esp8266. Looking at it.

jcmvbkbc commented 7 years ago

Ok, my problem was that unwind-dw2-fde-dip.c should not have been used on baremetal elf target. It should be fixed with commit a194053064fba3c261bce32f2eebe16e4d775225. I suspect that it also fixes issues seen on *BSD/macOS, can you guys please check?

igrr commented 7 years ago

Thanks, this fixes the issue on macOS.