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bug#19973: Grafts break debug outputs
From: |
Mark H Weaver |
Subject: |
bug#19973: Grafts break debug outputs |
Date: |
Sun, 01 Mar 2015 00:24:57 -0500 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.4 (gnu/linux) |
Mark H Weaver <address@hidden> writes:
> Grafts break debug outputs, or at least that's my guess.
> Here's what I see:
>
> address@hidden:~$ guix build guile
> guix build: warning: ambiguous package specification `guile'
> guix build: warning: choosing guile-2.0.11 from gnu/packages/guile.scm:110:2
> /gnu/store/3lhr8q28q6f59774di9av7ncy09jd55d-guile-2.0.11
> /gnu/store/rgv3fvy6xqp6966rfh8v6fv7m48abcbh-guile-2.0.11-debug
> address@hidden:~$ guix package -I guile
> guile 2.0.11 out /gnu/store/3lhr8q28q6f59774di9av7ncy09jd55d-guile-2.0.11
> guile 2.0.11 debug
> /gnu/store/rgv3fvy6xqp6966rfh8v6fv7m48abcbh-guile-2.0.11-debug
> address@hidden:~$ ls -l .guix-profile/lib/debug/gnu/store/
> total 8
> lrwxrwxrwx 12 root guixbuild 128 Dec 31 1969
> 122jv790mv2mlnylbrbzav65vghbw93n-guile-2.0.11 ->
> /gnu/store/rgv3fvy6xqp6966rfh8v6fv7m48abcbh-guile-2.0.11-debug/lib/debug/gnu/store/122jv790mv2mlnylbrbzav65vghbw93n-guile-2.0.11
> lrwxrwxrwx 15 root guixbuild 127 Dec 31 1969
> 3g20rdmnavpblsmgppyl8jhg67nidhjk-glibc-2.20 ->
> /gnu/store/hrny2whqg9c3m0klyfpbmmcyiir9yf8m-gcc-toolchain-4.9.2/lib/debug/gnu/store/3g20rdmnavpblsmgppyl8jhg67nidhjk-glibc-2.20
>
> I guess GDB can't find the debugging information because
> 122jv790mv2mlnylbrbzav65vghbw93n-guile-2.0.11 is the name of the guile
> directory *before* grafting.
>
> To work around this, I created my own ~/mydebug directory:
>
> address@hidden:~/mydebug/gnu/store$ ln -s
> /gnu/store/rgv3fvy6xqp6966rfh8v6fv7m48abcbh-guile-2.0.11-debug/lib/debug/gnu/store/122jv790mv2mlnylbrbzav65vghbw93n-guile-2.0.11
> 3lhr8q28q6f59774di9av7ncy09jd55d-guile-2.0.11
>
> and then pointed GDB at ~/mydebug and then debugging works again.
I've since discovered that because our grafting is not done properly,
for now we need symbolic links for both the pre-grafted and post-grafted
directories.
I installed libgc:debug and then created a proper symlink in ~/mydebug,
but because our guile is still linked against the pre-grafted libgc, we
need a symbolic link with the pre-grafted name. So here's what I have
now:
address@hidden:~/mydebug/gnu/store$ ls -l
total 12
lrwxrwxrwx 1 mhw mhw 128 Mar 1 00:00
3lhr8q28q6f59774di9av7ncy09jd55d-guile-2.0.11 ->
/gnu/store/rgv3fvy6xqp6966rfh8v6fv7m48abcbh-guile-2.0.11-debug/lib/debug/gnu/store/122jv790mv2mlnylbrbzav65vghbw93n-guile-2.0.11
lrwxrwxrwx 1 mhw mhw 126 Mar 1 00:18
h6byyxpii73xlbhiq5lxfq3n6qzqwsif-libgc-7.4.2 ->
/gnu/store/k0xjv8l196j4nxgbz8dxz6xz7kbysaix-libgc-7.4.2-debug/lib/debug/gnu/store/zshjm1ilbzz0z0zpxr17h13jnmilga7l-libgc-7.4.2
lrwxrwxrwx 1 mhw mhw 126 Mar 1 00:21
zshjm1ilbzz0z0zpxr17h13jnmilga7l-libgc-7.4.2 ->
/gnu/store/k0xjv8l196j4nxgbz8dxz6xz7kbysaix-libgc-7.4.2-debug/lib/debug/gnu/store/zshjm1ilbzz0z0zpxr17h13jnmilga7l-libgc-7.4.2
Mark