Bug 10846

Summary:	error in compiling gnutls
Product:	buildroot	Reporter:	tinotom
Component:	Other	Assignee:	unassigned
Status:	RESOLVED FIXED
Severity:	normal	CC:	buildroot
Priority:	P5
Version:	2018.02
Target Milestone:	---
Hardware:	All
OS:	Linux
Host:		Target:
Build:
Attachments:	buildroot .config linux-4.15 .config gnutls config.log

Description tinotom 2018-03-06 16:50:40 UTC

Hi,

it seems there is a bug in some header file in gnutls 3.5.17 .
Platform: Ubuntu 17.10 up-to-date on x86_64
Target: orange-pi-zero + systemd

Please read below an excerpt of the output:

[...]
checking dynamic linker characteristics... GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... no
checking how to run the C++ preprocessor... cpp
configure: error: in `/home/santo/buildroot-2018.02/output/build/gnutls-3.5.17':
configure: error: C++ preprocessor "cpp" fails sanity check
See `config.log' for more details
package/pkg-generic.mk:237: recipe for target '/home/santo/buildroot-2018.02/output/build/gnutls-3.5.17/.stamp_configured' failed
make[1]: *** [/home/santo/buildroot-2018.02/output/build/gnutls-3.5.17/.stamp_configured] Error 1
Makefile:79: recipe for target '_all' failed
make: *** [_all] Error 2
santo@lapin:~/buildroot-2018.02$
[...]

in the corresponding config.log:
[...]
ldroot-2018.02/output/host/arm-buildroot-linux-gnueabihf/bin --enable-shared --disable-libgomp
Thread model: posix
gcc version 6.4.0 (Buildroot 2018.02) 
configure:5369: $? = 0
configure:5358: /home/santo/buildroot-2018.02/output/host/bin/arm-buildroot-linux-gnueabihf-gcc -V >&5
arm-buildroot-linux-gnueabihf-gcc.br_real: error: unrecognized command line option '-V'
arm-buildroot-linux-gnueabihf-gcc.br_real: fatal error: no input files
compilation terminated.
configure:5369: $? = 1
configure:5358: /home/santo/buildroot-2018.02/output/host/bin/arm-buildroot-linux-gnueabihf-gcc -qversion >&5
[...]

Please let me know if teh above is not enough.
Thank you

Comment 1 Peter Seiderer 2018-03-06 21:19:11 UTC

The cited config.log fragment is unrelated to the shown error (1), please
try:

    $ make clean
    $ make

And if the error shows up again please provide your .config/defconfig file (see
http://nightly.buildroot.org/manual.html#reporting-bugs) and/or the complete
build/gnutls-3.5.17/config.log file...

(1) not all errors in config.log lead to an configure error, there are many/hundreds of tests in there...

Comment 2 tinotom 2018-03-17 17:05:19 UTC

Created attachment 7516 [details]
buildroot .config

Comment 3 tinotom 2018-03-17 17:07:40 UTC

Created attachment 7521 [details]
linux-4.15 .config

Comment 4 tinotom 2018-03-17 17:09:20 UTC

Created attachment 7526 [details]
gnutls config.log

Comment 5 tinotom 2018-03-17 17:11:46 UTC

Hi Peter, thank you for looking into this.
I tried to install buildroot on another machine, but the error is the same.

Perhaps a better spot can be:

[...]
configure:49488: result: cpp
configure:49508: cpp -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -I/storage/santo/buildroot/buildroot-2018.02/output/host/arm-buildroot-linux-gnueabihf/sysroot/usr/include
 conftest.cpp
In file included from /storage/santo/buildroot/buildroot-2018.02/output/host/arm-buildroot-linux-gnueabihf/sysroot/usr/include/features.h:447:0,
                 from /storage/santo/buildroot/buildroot-2018.02/output/host/arm-buildroot-linux-gnueabihf/sysroot/usr/include/bits/libc-header-start.h:33,
                 from /storage/santo/buildroot/buildroot-2018.02/output/host/arm-buildroot-linux-gnueabihf/sysroot/usr/include/limits.h:26,
                 from conftest.cpp:683:
/storage/santo/buildroot/buildroot-2018.02/output/host/arm-buildroot-linux-gnueabihf/sysroot/usr/include/gnu/stubs.h:7:11: fatal error: gnu/stubs-soft.h: No such file or directory
 # include <gnu/stubs-soft.h>
           ^~~~~~~~~~~~~~~~~~
compilation terminated.
configure:49508: $? = 1
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME "GnuTLS"
| #define PACKAGE_TARNAME "gnutls"
[...]

. Anyway I've attached the buildroot .config, the linux kernel .config and the config.log.

Thank you,

Comment 6 Peter Seiderer 2018-03-21 19:52:38 UTC

Yes, this config.log location was the real failure reason.

The hints to the solution are:

- checking how to run the C++ preprocessor... cpp
- configure:49488: result: cpp

Your toolchain is missing C++ support (and the gnutls packages is missing
the C++ dependency), the following buildroot config change fixed the
failure for me:

    $ diff -u .config.old .config
@@ -299,7 +300,7 @@
 BR2_GCC_SUPPORTS_FINEGRAINEDMTUNE=y
 BR2_GCC_VERSION="6.4.0"
 BR2_EXTRA_GCC_CONFIG_OPTIONS=""
-# BR2_TOOLCHAIN_BUILDROOT_CXX is not set
+BR2_TOOLCHAIN_BUILDROOT_CXX=y
 # BR2_TOOLCHAIN_BUILDROOT_FORTRAN is not set
 # BR2_GCC_ENABLE_LTO is not set
 # BR2_GCC_ENABLE_OPENMP is not set

Regards,
Peter

Comment 7 tinotom 2018-03-23 14:55:31 UTC

Hi Peter,

thank you very much, your solution works and I've been able to generate the image.
Thank you very much again for your time.
Best,