ESP8266 Community Forum

- Fri Oct 07, 2016 7:27 pm #56214 BTW, this is what I get when I set the same PATH and run the exact same command in a Cygwin terminal. So the actual toolchain is working ok, it's just the Windows/Eclipse specific instantiation of the commands that are failing.

***UPDATE***
So I ran the exact same test in a Windows CMD window and got the same errors as in the Eclipse environment, so it's definitely a Windows related issue.

Code: Select alldnorris@P50-DKV1M71 ~
$ export PATH="/cygdrive/d/esp8266/xtensa-lx106-elf/bin:${PATH}"

dnorris@P50-DKV1M71 ~
$ xtensa-lx106-elf-gcc -E -P -v -dD /cygdrive/c/workspaces/esp/.metadata/.plugins/org.eclipse.cdt.managedbuilder.core/spec.c
Using built-in specs.
COLLECT_GCC=xtensa-lx106-elf-gcc
Target: xtensa-lx106-elf
Configured with: /cygdrive/d/Data/git/esp-open-sdk/crosstool-NG/.build/src/gcc-4.8.5/configure --build=x86_64-build_unknown-cygwin --host=x86_64-build_unknown-cygwin --target=xtensa-lx106-elf --prefix=/cygdrive/d/esp8266/xtensa-lx106-elf --with-local-prefix=/cygdrive/d/esp8266/xtensa-lx106-elf/xtensa-lx106-elf/sysroot --with-sysroot=/cygdrive/d/esp8266/xtensa-lx106-elf/xtensa-lx106-elf/sysroot --with-newlib --enable-threads=no --disable-shared --with-pkgversion='crosstool-NG crosstool-ng-1.22.0-55-gecfc19a' --disable-__cxa_atexit --enable-cxx-flags='-fno-exceptions -fno-rtti' --with-gmp=/cygdrive/d/Data/git/esp-open-sdk/crosstool-NG/.build/xtensa-lx106-elf/buildtools --with-mpfr=/cygdrive/d/Data/git/esp-open-sdk/crosstool-NG/.build/xtensa-lx106-elf/buildtools --with-mpc=/cygdrive/d/Data/git/esp-open-sdk/crosstool-NG/.build/xtensa-lx106-elf/buildtools --with-isl=/cygdrive/d/Data/git/esp-open-sdk/crosstool-NG/.build/xtensa-lx106-elf/buildtools --with-cloog=/cygdrive/d/Data/git/esp-open-sdk/crosstool-NG/.build/xtensa-lx106-elf/buildtools --with-libelf=/cygdrive/d/Data/git/esp-open-sdk/crosstool-NG/.build/xtensa-lx106-elf/buildtools --enable-lto --enable-target-optspace --without-long-double-128 --disable-libgomp --disable-libmudflap --disable-libssp --disable-libquadmath --disable-libquadmath-support --disable-nls --disable-libstdcxx-pch --disable-multilib --enable-languages=c,c++
Thread model: single
gcc version 4.8.5 (crosstool-NG crosstool-ng-1.22.0-55-gecfc19a)
COLLECT_GCC_OPTIONS='-E' '-P' '-v' '-dD'
 /cygdrive/d/esp8266/xtensa-lx106-elf/libexec/gcc/xtensa-lx106-elf/4.8.5/cc1.exe -E -quiet -v -P /cygdrive/c/workspaces/esp/.metadata/.plugins/org.eclipse.cdt.managedbuilder.core/spec.c -dD
ignoring nonexistent directory "/cygdrive/d/esp8266/xtensa-lx106-elf/xtensa-lx106-elf/sysroot/cygdrive/d/esp8266/xtensa-lx106-elf/xtensa-lx106-elf/sysroot/include"
#include "..." search starts here:
#include <...> search starts here:
 /cygdrive/d/esp8266/xtensa-lx106-elf/lib/gcc/xtensa-lx106-elf/4.8.5/include
 /cygdrive/d/esp8266/xtensa-lx106-elf/lib/gcc/xtensa-lx106-elf/4.8.5/include-fixed
 /cygdrive/d/esp8266/xtensa-lx106-elf/lib/gcc/xtensa-lx106-elf/4.8.5/../../../../xtensa-lx106-elf/include
 /cygdrive/d/esp8266/xtensa-lx106-elf/xtensa-lx106-elf/sysroot/usr/include
End of search list.
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#define __WCHAR_MAX__ 65535
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#define __INTMAX_C(c) c ## LL
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#define __INT_FAST8_MAX__ 2147483647
#define __INT_FAST16_MAX__ 2147483647
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#define __INT_FAST64_MAX__ 9223372036854775807LL
#define __UINT_FAST8_MAX__ 4294967295U
#define __UINT_FAST16_MAX__ 4294967295U
#define __UINT_FAST32_MAX__ 4294967295U
#define __UINT_FAST64_MAX__ 18446744073709551615ULL
#define __INTPTR_MAX__ 2147483647
#define __UINTPTR_MAX__ 4294967295U
#define __FLT_EVAL_METHOD__ 0
#define __DEC_EVAL_METHOD__ 2
#define __FLT_RADIX__ 2
#define __FLT_MANT_DIG__ 24
#define __FLT_DIG__ 6
#define __FLT_MIN_EXP__ (-125)
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#define __DEC64_MANT_DIG__ 16
#define __DEC64_MIN_EXP__ (-382)
#define __DEC64_MAX_EXP__ 385
#define __DEC64_MIN__ 1E-383DD
#define __DEC64_MAX__ 9.999999999999999E384DD
#define __DEC64_EPSILON__ 1E-15DD
#define __DEC64_SUBNORMAL_MIN__ 0.000000000000001E-383DD
#define __DEC128_MANT_DIG__ 34
#define __DEC128_MIN_EXP__ (-6142)
#define __DEC128_MAX_EXP__ 6145
#define __DEC128_MIN__ 1E-6143DL
#define __DEC128_MAX__ 9.999999999999999999999999999999999E6144DL
#define __DEC128_EPSILON__ 1E-33DL
#define __DEC128_SUBNORMAL_MIN__ 0.000000000000000000000000000000001E-6143DL
#define __REGISTER_PREFIX__
#define __USER_LABEL_PREFIX__
#define __GNUC_GNU_INLINE__ 1
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#define __CHAR_UNSIGNED__ 1
#define __GCC_ATOMIC_BOOL_LOCK_FREE 1
#define __GCC_ATOMIC_CHAR_LOCK_FREE 1
#define __GCC_ATOMIC_CHAR16_T_LOCK_FREE 1
#define __GCC_ATOMIC_CHAR32_T_LOCK_FREE 1
#define __GCC_ATOMIC_WCHAR_T_LOCK_FREE 1
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COMPILER_PATH=/cygdrive/d/esp8266/xtensa-lx106-elf/libexec/gcc/xtensa-lx106-elf/4.8.5/:/cygdrive/d/esp8266/xtensa-lx106-elf/libexec/gcc/xtensa-lx106-elf/4.8.5/:/cygdrive/d/esp8266/xtensa-lx106-elf/libexec/gcc/xtensa-lx106-elf/:/cygdrive/d/esp8266/xtensa-lx106-elf/lib/gcc/xtensa-lx106-elf/4.8.5/:/cygdrive/d/esp8266/xtensa-lx106-elf/lib/gcc/xtensa-lx106-elf/:/cygdrive/d/esp8266/xtensa-lx106-elf/lib/gcc/xtensa-lx106-elf/4.8.5/../../../../xtensa-lx106-elf/bin/
LIBRARY_PATH=/cygdrive/d/esp8266/xtensa-lx106-elf/lib/gcc/xtensa-lx106-elf/4.8.5/:/cygdrive/d/esp8266/xtensa-lx106-elf/lib/gcc/xtensa-lx106-elf/4.8.5/../../../../xtensa-lx106-elf/lib/:/cygdrive/d/esp8266/xtensa-lx106-elf/xtensa-lx106-elf/sysroot/lib/:/cygdrive/d/esp8266/xtensa-lx106-elf/xtensa-lx106-elf/sysroot/usr/lib/
COLLECT_GCC_OPTIONS='-E' '-P' '-v' '-dD'



- Sat Oct 08, 2016 10:02 pm #56263 OK so it looks like I may have found something relevant...

Looks like Windows has issues with the access() function when GCC tries to build a path to the relocatable executables. Under Linux and Unix based systems they have execute access testing but not in Windows, and so it barfs when GCC checks the path for execute access, and instead returns nothing, hence the path falls of the front of cc1.exe.

Need to dig a bit more....

- Sun Oct 09, 2016 7:16 am #56271 ALMOST THERE!!!

So after digging around quite a bit I found out that indeed there is a bug in gcc 4.8.5 where it doesn't correctly return execute permission status on paths, and this in turn causes the prefixed path to go missing on cc1.exe, so I bumped gcc to version 5.2.0

Unfortunately esp-open-sdk has gcc4.8.5 hardwired in to some extent and you can't select a different version simply by adding it to crosstool-config-overrides, so you have to manually edit /esp-open-sdk/crosstool-NG/samples/xtensa-lx106-elf/crosstool.config, which is a bit nasty - we should be able to override this stuff locally using the override file.

Anyway I changed CT_CC_GCC_V_4_8_5=y to CT_CC_GCC_V_5_2_0=y and built the world. Everything compiled ok, and when I added the new toolchain to my project, gcc ran perfectly and populated my default directories!!

Almost...

While the Makefile based builds are fine, the default include directories all start with /cygdrive/d/... and can't be resolved, which messes up the editor, code completion, and syntax checking. The gdb settings have a mapping section that you can use to resolve /cygdrive/c/ to C:/ and /cygdrive/d/ to D:/ but it doesn't apply to the include directories.

But at least I have a working Makefile based build at this time

- Mon Oct 10, 2016 2:36 am #56306

You may want to add my changes from my last post to your Git project - that's the updated SDK name and URL, and the Cygwin64 specific patch.

SDK name and URL are outside the crosstool-NG realm, but I can apply the cygwin64-specific patch.

I don't suppose you know what the diffs between your current and open-esp-sdk are? Can I just update the submodule in open-esp-sdk to your HEAD?

My current crosstool-NG? I believe my xtensa-1.22.x branch is a couple of patches ahead of what open-esp-sdk refers to, but they are not significant. You should be able to update to the latest crosstool-NG in the open-esp-sdk and it should just work.

I've submitted the Cygwin64 patch to the upstream crosstool-NG project too BTW

This is really good. It could be even better if you made a pull request, as the current crosstool-NG maintainer seems overloaded, so the easier it is to apply the higher is the chance to see it in the mainline.