Re: Freezing core-updates

[Andreas Enge <andreas@enge.fr>]

On Tue, May 31, 2016 at 11:36:21PM +0200, Ludovic Courtès wrote:
> Quick observation: one of the file has debugging symbols, the other not.
> Apart from that, section sizes are very similar:

That is understandable, the debugging symbols come from stage 2, the files
without from stage 3.


To check for an easy work-around, I tested to upgrade the standard gcc
from 5.3 to 6.1. But this fails as follows:

setenv.c: In function '__unsetenv':
setenv.c:279:6: error: suggest explicit braces to avoid ambiguous 'else' [-Werror=parentheses]
   if (ep != NULL)
      ^
cc1: all warnings being treated as errors
../o-iterator.mk:9: recipe for target '/tmp/guix-build-glibc-intermediate-2.23.drv-0/build/stdlib/setenv.o' failed
make[2]: *** [/tmp/guix-build-glibc-intermediate-2.23.drv-0/build/stdlib/setenv.o] Error 1
make[2]: Leaving directory '/tmp/guix-build-glibc-intermediate-2.23.drv-0/glibc-2.23/stdlib'
Makefile:214: recipe for target 'stdlib/subdir_lib' failed
make[1]: *** [stdlib/subdir_lib] Error 2
make[1]: Leaving directory '/tmp/guix-build-glibc-intermediate-2.23.drv-0/glibc-2.23'
Makefile:9: recipe for target 'all' failed
make: *** [all] Error 2
phase `build' failed after 350.8 seconds
builder for `/gnu/store/ja64ppaspnvx5q1a9nlfa0n3hp9kb2p1-glibc-intermediate-2.23.drv' failed with exit code 1
@ build-failed /gnu/store/ja64ppaspnvx5q1a9nlfa0n3hp9kb2p1-glibc-intermediate-2.23.drv - 1 builder for `/gnu/store/ja64ppaspnvx5q1a9nlfa0n3hp9kb2p1-glibc-intermediate-2.23.drv' failed with exit code 1
cannot build derivation `/gnu/store/cnd7vjf59wkvma15zicdv9gg8hl084q7-bash-static-4.3.42.drv': 1 dependencies couldn't be built
cannot build derivation `/gnu/store/p8fsvdqby0api3fhpjk8fg7szv8xqdbn-gcc-6.1.0.drv': 1 dependencies couldn't be built
cannot build derivation `/gnu/store/x34g9mhwn0ssqxfp3w0gy1dnwacm5dh1-gcc-6.1.0.drv': 1 dependencies couldn't be built
cannot build derivation `/gnu/store/7xvr4q068i3h49sad9wab3fbpfgivbn9-glibc-2.23.drv': 1 dependencies couldn't be built
cannot build derivation `/gnu/store/ln53k3lix5421ykvhh8k0pnjbg81f1yi-hello-2.10.drv': 1 dependencies couldn't be built
guix build: error: build failed: build of `/gnu/store/ln53k3lix5421ykvhh8k0pnjbg81f1yi-hello-2.10.drv' failed

Maybe "all warnings treated as errors" is a bit exaggerated here, but in any
case, upgrading gcc is not an easy fix.

> We should check the build log for the command lines used to build
> real.o.

I find this:
105038:libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I../../../gcc-5.3.0/mpc/src -I.. -I/tmp/guix-build-gcc-5.3.0.drv-0/build/./gmp -I/tmp/guix-build-gcc-5.3.0.drv-0/gcc-5.3.0/mpfr/src -g -MT real.lo -MD -MP -MF .deps/real.Tpo -c ../../../gcc-5.3.0/mpc/src/real.c -o real.o
115976:libtool: compile:  /tmp/guix-build-gcc-5.3.0.drv-0/build/./prev-gcc/xgcc -B/tmp/guix-build-gcc-5.3.0.drv-0/build/./prev-gcc/ -B/gnu/store/6xdd64b8343v9vd3nkhkkqg7mayyxvwp-gcc-5.3.0/arm-unknown-linux-gnueabihf/bin/ -B/gnu/store/6xdd64b8343v9vd3nkhkkqg7mayyxvwp-gcc-5.3.0/arm-unknown-linux-gnueabihf/bin/ -B/gnu/store/6xdd64b8343v9vd3nkhkkqg7mayyxvwp-gcc-5.3.0/arm-unknown-linux-gnueabihf/lib/ -isystem /gnu/store/6xdd64b8343v9vd3nkhkkqg7mayyxvwp-gcc-5.3.0/arm-unknown-linux-gnueabihf/include -isystem /gnu/store/6xdd64b8343v9vd3nkhkkqg7mayyxvwp-gcc-5.3.0/arm-unknown-linux-gnueabihf/sys-include -DHAVE_CONFIG_H -I. -I../../../gcc-5.3.0/mpc/src -I.. -I/tmp/guix-build-gcc-5.3.0.drv-0/build/./gmp -I/tmp/guix-build-gcc-5.3.0.drv-0/gcc-5.3.0/mpfr/src -O2 -g0 -gtoggle -MT real.lo -MD -MP -MF .deps
 /real.Tpo -c ../../../gcc-5.3.0/mpc/src/real.c -o real.o
126915:libtool: compile:  /tmp/guix-build-gcc-5.3.0.drv-0/build/./prev-gcc/xgcc -B/tmp/guix-build-gcc-5.3.0.drv-0/build/./prev-gcc/ -B/gnu/store/6xdd64b8343v9vd3nkhkkqg7mayyxvwp-gcc-5.3.0/arm-unknown-linux-gnueabihf/bin/ -B/gnu/store/6xdd64b8343v9vd3nkhkkqg7mayyxvwp-gcc-5.3.0/arm-unknown-linux-gnueabihf/bin/ -B/gnu/store/6xdd64b8343v9vd3nkhkkqg7mayyxvwp-gcc-5.3.0/arm-unknown-linux-gnueabihf/lib/ -isystem /gnu/store/6xdd64b8343v9vd3nkhkkqg7mayyxvwp-gcc-5.3.0/arm-unknown-linux-gnueabihf/include -isystem /gnu/store/6xdd64b8343v9vd3nkhkkqg7mayyxvwp-gcc-5.3.0/arm-unknown-linux-gnueabihf/sys-include -DHAVE_CONFIG_H -I. -I../../../gcc-5.3.0/mpc/src -I.. -I/tmp/guix-build-gcc-5.3.0.drv-0/build/./gmp -I/tmp/guix-build-gcc-5.3.0.drv-0/gcc-5.3.0/mpfr/src -O2 -g0 -MT real.lo -MD -MP -MF .deps/real.Tpo
  -c ../../../gcc-5.3.0/mpc/src/real.c -o real.o

Maybe real.o is not the easiest example, since it also involves gmp and mpfr.

Andreas