Hi all,
I believe there's a untriggered bug in chapter 6, Re-adjusting the toolchain.
We've just entered the chroot, installed the kernel headers and built glibc.
At this point we still only have /tools/bin/gcc. We've just built glibc so we
have it under /lib.
Now we re-adjust the gcc (the /tools gcc, note) specs to use the newly built
linker.
This is the code:
gcc -dumpspecs | sed \
-e 's@/tools/lib/ld-linux.so.2@/lib/[EMAIL PROTECTED]' \
-e '/\*startfile_prefix_spec:/{n;[EMAIL PROTECTED]@/usr/lib/ @}' \
-e '/\*cpp:/{n;[EMAIL PROTECTED]@ -isystem /usr/[EMAIL PROTECTED]' > \
`dirname $(gcc --print-libgcc-file-name)`/specs
this expands to /tools/lib/gcc/i686-pc-linux-gnu/4.1.2/specs (LFS-6.3)
So far, so (kinda) good, and still the problem is not triggered.
Then we go on building the rest of Chapter 6. If this is all you ever use
/tools for, and I'd say about 98% of the people building LFS do just that,
you're ok.
Now, I remember reading in the book that /tools could be kept in case you want
to build more instances of LFS. I quickly scanned the LFS-6.3 but couldn't
find the text. Maybe it was in an older book and has been removed since. But
this is what we do for ipcop, we pack up /tools for speeding up future rebuilds.
Suppose you do want to use /tools to build another LFS and you tar it up (just
/mnt/lfs/tools, not the rest in /mnt/lfs) and you unpack it on a new host and
you chroot into it:
chroot "$LFS" /tools/bin/env -i \
HOME=/root TERM="$TERM" PS1='\u:\w\$ ' \
PATH=/bin:/usr/bin:/sbin:/usr/sbin:/tools/bin \
/tools/bin/bash --login +h
And now you want to build something. Aha:
I have no name!:/# ls /
tools
I have no name!:/#
I have no name!:/# echo 'main(){}' > test.c
I have no name!:/# gcc -v test.c
Reading specs from /tools/lib/gcc/i686-pc-linux-gnu/4.1.2/specs
Target: i686-pc-linux-gnu
Configured with: ../gcc-4.1.2/configure --prefix=/tools
--with-local-prefix=/tools --enable-clocale=gnu --enable-shared
--enable-threads=posix --enable-__cxa_atexit --enable-languages=c,c++
--disable-libstdcxx-pch
Thread model: posix
gcc version 4.1.2
/tools/libexec/gcc/i686-pc-linux-gnu/4.1.2/cc1 -quiet -v -isystem /usr/include
test.c -quiet -dumpbase test.c -mtune=pentiumpro -auxbase test -version -o
./ccjh2EpS.s
ignoring nonexistent directory "/usr/include"
ignoring nonexistent directory
"/tools/lib/gcc/i686-pc-linux-gnu/4.1.2/../../../../i686-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/tools/include
/tools/lib/gcc/i686-pc-linux-gnu/4.1.2/include
End of search list.
GNU C version 4.1.2 (i686-pc-linux-gnu)
compiled by GNU C version 4.1.2.
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: bde1f24b4119042caf7e7373b8ff1063
/tools/lib/gcc/i686-pc-linux-gnu/4.1.2/../../../../i686-pc-linux-gnu/bin/as -V
-Qy -o ./ccSRA7oz.o ./ccjh2EpS.s
GNU assembler version 2.17 (i686-pc-linux-gnu) using BFD version 2.17
/tools/libexec/gcc/i686-pc-linux-gnu/4.1.2/collect2 --eh-frame-hdr -m elf_i386
-dynamic-linker /lib/ld-linux.so.2 crt1.o crti.o
/tools/lib/gcc/i686-pc-linux-gnu/4.1.2/crtbegin.o
-L/tools/lib/gcc/i686-pc-linux-gnu/4.1.2
-L/tools/lib/gcc/i686-pc-linux-gnu/4.1.2/../../../../i686-pc-linux-gnu/lib
./ccSRA7oz.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed
-lgcc_s --no-as-needed /tools/lib/gcc/i686-pc-linux-gnu/4.1.2/crtend.o crtn.o
/tools/lib/gcc/i686-pc-linux-gnu/4.1.2/../../../../i686-pc-linux-gnu/bin/ld:
crt1.o: No such file: No such file or directory
collect2: ld returned 1 exit status
I have no name!:/# gcc -dumpspecs > specs
I have no name!:/# diff -Naur /tools/lib/gcc/i686-pc-linux-gnu/4.1.2/specs specs
--- /tools/lib/gcc/i686-pc-linux-gnu/4.1.2/specs 2007-09-19
03:10:39.000000000 +0000
+++ specs 2007-12-10 06:55:36.000000000 +0000
@@ -15,7 +15,7 @@
as %(asm_options) %|.s %A }
*cpp:
-%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT} -isystem /usr/include
+%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}
*cpp_options:
%(cpp_unique_options) %1 %{m*} %{std*&ansi&trigraphs} %{W*&pedantic*} %{w}
%{f*} %{g*:%{!g0:%{!fno-working-directory:-fworking-directory}}} %{O*} %{undef}
%{save-temps:-fpch-preprocess}
@@ -108,7 +108,7 @@
*startfile_prefix_spec:
-/usr/lib/
+
*sysroot_spec:
--sysroot=%R
@@ -133,7 +133,7 @@
elf_i386
*dynamic_linker:
-/lib/ld-linux.so.2
+/tools/lib/ld-linux.so.2
*link_command:
%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S: %(linker) %l %{pie:-pie} %X
%{o*} %{A} %{d} %{e*} %{m} %{N} %{n} %{r} %{s} %{t} %{u*} %{x} %{z} %{Z}
%{!A:%{!nostdlib:%{!nostartfiles:%S}}} %{static:} %{L*} %(mfwrap)
%(link_libgcc) %o %(mflib)
%{fprofile-arcs|fprofile-generate|coverage:-lgcov}
%{!nostdlib:%{!nodefaultlibs:%(link_ssp) %(link_gcc_c_sequence)}}
%{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} }}}}}}
I have no name!:/#
So, we should not overwrite the /tools gcc specs in Chapter 6, but keep a copy
of it in, say, /tools/lib/gcc/i686-pc-linux-gnu/4.1.2/specs-tools and rename it
back after we build gcc in Chapter 6. Then we can guarantee that /tools is
self-sufficient. Maybe we should do a pass 2 of the readjustment in Chapter 6.
This is what I'll do for ipcop, but if you come up with a better solution, I'd
rather stick with LFS book.
IvanK.
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