Bug 11036 - C compiler cannot create executables
Summary: C compiler cannot create executables
Status: RESOLVED INVALID
Alias: None
Product: buildroot
Classification: Unclassified
Component: Other (show other bugs)
Version: 2018.02.1
Hardware: All Linux
: P5 normal
Target Milestone: ---
Assignee: unassigned
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2018-05-23 14:44 UTC by outtierbert
Modified: 2018-05-24 06:23 UTC (History)
1 user (show)

See Also:
Host:
Target:
Build:

Attachments
file located in output/build/host-gcc-initial-6.4.0/build/arm-buildroot-linux-uclibcgnueabihf/libgcc/config.log (19.32 KB, text/x-log)
2018-05-23 14:44 UTC, outtierbert 		Details
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Description outtierbert 2018-05-23 14:44:42 UTC 
Created attachment 7596 [details]
file located in output/build/host-gcc-initial-6.4.0/build/arm-buildroot-linux-uclibcgnueabihf/libgcc/config.log

Hi all,

I am trying to build my buildroot project, but I keep on getting a strange error.

In the build step of host-gcc-initial, I get an error when it builds libgcc: 

Checking multilib configuration for libgcc...
mkdir -p -- arm-buildroot-linux-uclibcgnueabihf/libgcc
Configuring in arm-buildroot-linux-uclibcgnueabihf/libgcc
configure: creating cache ./config.cache
checking build system type... x86_64-pc-linux-gnu
checking host system type... arm-buildroot-linux-uclibcgnueabihf
checking for --enable-version-specific-runtime-libs... no
checking for a BSD-compatible install... /usr/bin/install -c
checking for gawk... gawk
checking for arm-buildroot-linux-uclibcgnueabihf-ar... /home/bertou/development/bernardo-buildroot/buildroot/output/host/arm-buildroot-linux-uclibcgnueabihf/bin/ar
checking for arm-buildroot-linux-uclibcgnueabihf-lipo... arm-buildroot-linux-uclibcgnueabihf-lipo
checking for arm-buildroot-linux-uclibcgnueabihf-nm... /home/bertou/development/bernardo-buildroot/buildroot/output/build/host-gcc-initial-6.4.0/build/./gcc/nm
checking for arm-buildroot-linux-uclibcgnueabihf-ranlib... /home/bertou/development/bernardo-buildroot/buildroot/output/host/arm-buildroot-linux-uclibcgnueabihf/bin/ranlib
checking for arm-buildroot-linux-uclibcgnueabihf-strip... /home/bertou/development/bernardo-buildroot/buildroot/output/host/arm-buildroot-linux-uclibcgnueabihf/bin/strip
checking whether ln -s works... yes
checking for arm-buildroot-linux-uclibcgnueabihf-gcc...  /home/bertou/development/bernardo-buildroot/buildroot/output/build/host-gcc-initial-6.4.0/build/./gcc/xgcc -B/home/bertou/development/bernardo-buildroot/buildroot/output/build/host-gcc-initial-6.4.0/build/./gcc/ -B/home/bertou/development/bernardo-buildroot/buildroot/output/host/arm-buildroot-linux-uclibcgnueabihf/bin/ -B/home/bertou/development/bernardo-buildroot/buildroot/output/host/arm-buildroot-linux-uclibcgnueabihf/lib/ -isystem /home/bertou/development/bernardo-buildroot/buildroot/output/host/arm-buildroot-linux-uclibcgnueabihf/include -isystem /home/bertou/development/bernardo-buildroot/buildroot/output/host/arm-buildroot-linux-uclibcgnueabihf/sys-include   
checking for C compiler default output file name... 
configure: error: in `/home/bertou/development/bernardo-buildroot/buildroot/output/build/host-gcc-initial-6.4.0/build/arm-buildroot-linux-uclibcgnueabihf/libgcc':
configure: error: C compiler cannot create executables
See `config.log' for more details.
Makefile:10976: recipe for target 'configure-target-libgcc' failed
make[2]: *** [configure-target-libgcc] Error 1
package/pkg-generic.mk:223: recipe for target '/home/bertou/development/bernardo-buildroot/buildroot/output/build/host-gcc-initial-6.4.0/.stamp_built' failed
make[1]: *** [/home/bertou/development/bernardo-buildroot/buildroot/output/build/host-gcc-initial-6.4.0/.stamp_built] Error 2
Makefile:79: recipe for target '_all' failed
make: *** [_all] Error 2

My system is a Ubuntu 16.04, gcc version 5.4.0

The full config.log is in attachment. I can build other buildroot projects just fine, so it does not seem to be a environment issue.

This is the buildroot defconfig that I am trying to build:

BR2_arm=y
BR2_cortex_a8=y
BR2_GLOBAL_PATCH_DIR="$(BR2_EXTERNAL_BERNARDO_PATH)/board/bernardo/patches"
BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_9=y
BR2_TARGET_GENERIC_GETTY_PORT="ttyO0"
BR2_ROOTFS_OVERLAY="$(BR2_EXTERNAL_BERNARDO_PATH)/board/bernardo/rootfs_overlay"
BR2_ROOTFS_POST_BUILD_SCRIPT="$(BR2_EXTERNAL_BERNARDO_PATH)/board/bernardo/post-build.sh"
BR2_ROOTFS_POST_IMAGE_SCRIPT="$(BR2_EXTERNAL_BERNARDO_PATH)/board/bernardo/post-image.sh"
BR2_LINUX_KERNEL=y
BR2_LINUX_KERNEL_CUSTOM_GIT=y
BR2_LINUX_KERNEL_CUSTOM_REPO_URL="https://github.com/RobertCNelson/linux-stable-rcn-ee"
BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="4.9.36-ti-r46"
BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="$(BR2_EXTERNAL_BERNARDO_PATH)/board/bernardo/kernel.config"
BR2_LINUX_KERNEL_DTS_SUPPORT=y
BR2_LINUX_KERNEL_USE_CUSTOM_DTS=y
BR2_LINUX_KERNEL_CUSTOM_DTS_PATH="$(BR2_EXTERNAL_BERNARDO_PATH)/board/bernardo/bernardo.dts"
BR2_PACKAGE_BUSYBOX_CONFIG="$(BR2_EXTERNAL_BERNARDO_PATH)/board/bernardo/busybox.config"
BR2_TARGET_ROOTFS_EXT2=y
BR2_TARGET_ROOTFS_EXT2_4=y
BR2_TARGET_UBOOT=y
BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
BR2_TARGET_UBOOT_CUSTOM_GIT=y
BR2_TARGET_UBOOT_CUSTOM_REPO_URL="https://github.com/u-boot/u-boot"
BR2_TARGET_UBOOT_CUSTOM_REPO_VERSION="v2018.01"
BR2_TARGET_UBOOT_PATCH="$(BR2_EXTERNAL_BERNARDO_PATH)/board/bernardo/u-boot"
BR2_TARGET_UBOOT_BOARD_DEFCONFIG="am335x_boneblack"
BR2_TARGET_UBOOT_NEEDS_DTC=y
# BR2_TARGET_UBOOT_FORMAT_BIN is not set
BR2_TARGET_UBOOT_FORMAT_IMG=y
BR2_TARGET_UBOOT_FORMAT_CUSTOM=y
BR2_TARGET_UBOOT_FORMAT_CUSTOM_NAME="spl/u-boot-spl.bin"
BR2_TARGET_UBOOT_SPL=y
BR2_TARGET_UBOOT_SPL_NAME="MLO"
BR2_PACKAGE_HOST_DOSFSTOOLS=y
BR2_PACKAGE_HOST_GENIMAGE=y
BR2_PACKAGE_HOST_MTOOLS=y

When I try to build the beaglebone_defconfig config (which is not that different), I do not have any issue. 

Can you guys help me?
Comment 1 Thomas Petazzoni 2018-05-23 14:58:00 UTC 
First question: does this issue appear when doing a full rebuild from scratch, i.e "make clean; make" ?
Comment 2 outtierbert 2018-05-23 15:03:53 UTC 
Yes, it does. I even completely removed the output folder once, just to be sure.
Comment 3 Thomas Petazzoni 2018-05-23 17:03:30 UTC 
OK. Could you try to provide a defconfig that exhibits the problem but does not use your own private BR2_EXTERNAL tree, so that we could try to reproduce the issue ?

Since it's the toolchain that is failing to build, normally only those options would be needed to reproduce the problem:

BR2_arm=y
BR2_cortex_a8=y
BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_9=y

the other options should not affect the toolchain build, except if your patches on gcc/binutils in $(BR2_EXTERNAL_BERNARDO_PATH)/board/bernardo/patches.
Comment 4 Arnout Vandecappelle 2018-05-23 21:29:53 UTC 
I suspect the problem must be in the external. The key is that config.log contains:

CFLAGS='-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os  -c -Wall -O2 -c -Wall -O2'

The -Os is from TARGET_OPTIMIZATION, then there is an empty TARGET_DEBUGGING, but the "-c -Wall -O2 -c -Wall -O2" is what causes the problem. Indeed, because of the -c, a conftest.o is generated while configure checks for a.out and conftest.exe etc.

So Bert, please check why TARGET_CFLAGS is modified (and if this is indeed the issue).
Comment 5 outtierbert 2018-05-24 06:23:17 UTC 
You were totally right Arnout. Thanks for the quick support guys!