soc:2009:dverkamp:journal:week3 - Etherboot/gPXE Wiki

====== Differences ====== This shows you the differences between two versions of the page.

--- soc:2009:dverkamp:journal:week3 [2009/06/09 17:34]
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+++ soc:2009:dverkamp:journal:week3 [2009/06/12 14:25] (current)
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@@ Line 15: / Line 15: @@
 Wrote detailed [[:soc:2009:dverkamp:notes:windows_pe|WinPE]] setup instructions.
+==== Wednesday, June 10 ====
+Continued debugging mkbootfs build; current uClibc wrapper script looks like this:
+  export PATH=~/src/buildroot/buildroot-2009.05/build_i686/staging_dir/usr/bin:$PATH
+  export CROSS_COMPILE=i686-linux-uclibc-
+  export CC=i686-linux-uclibc-gcc
+  $@
+However, this still breaks during the install phase of busybox's build; somehow, unprefixed ''gcc'' is used instead of the cross-targeted gcc, resulting in an attempt to link with glibc instead of uClibc.  Compilation before this point is using the correct cross gcc (''i686-linux-uclibc-gcc'').
+  make -C busybox install
+  make[1]: Entering directory `/home/daniel/src/mkbootfs/mkbootfs/busybox'
+  rm -f .kernelrelease
+  echo 1.9.0.svn > .kernelrelease
+  make -f scripts/Makefile.build obj=scripts/basic
+  make -f scripts/Makefile.build obj=.
+  make -f scripts/Makefile.build obj=scripts
+  make -f scripts/Makefile.build obj=applets
+    gcc -Wp,-MD,applets/.applets.o.d   -std=gnu99 -Iinclude -Ilibbb  -I/home/daniel/src/mkbootfs/mkbootfs/busybox/libbb -include include/autoconf.h -D_GNU_SOURCE -DNDEBUG -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D"BB_VER=KBUILD_STR(1.9.0.svn)" -DBB_BT=AUTOCONF_TIMESTAMP -D_FORTIFY_SOURCE=2  -Wall -Wshadow -Wwrite-strings -Wundef -Wstrict-prototypes -Wold-style-definition -Wmissing-prototypes -Wmissing-declarations -Os -fno-builtin-strlen -finline-limit=0 -fomit-frame-pointer -ffunction-sections -fdata-sections -fno-guess-branch-probability -funsigned-char -static-libgcc -falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1 -march=i386 -mpreferred-stack-boundary=2 -Wdeclaration-after-statement -Wno-pointer-sign    -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(applets)"  -D"KBUILD_MODNAME=KBUILD_STR(applets)" -c -o applets/applets.o applets/applets.c
+  applets/applets.c:15:2: warning: #warning Static linking against glibc produces buggy executables
+  applets/applets.c:16:2: warning: #warning (glibc does not cope well with ld --gc-sections).
+  applets/applets.c:17:2: warning: #warning See sources.redhat.com/bugzilla/show_bug.cgi?id=3400
+  applets/applets.c:18:2: warning: #warning Note that glibc is unsuitable for static linking anyway.
+  applets/applets.c:19:2: warning: #warning If you still want to do it, remove -Wl,--gc-sections
+  applets/applets.c:20:2: warning: #warning from scripts/trylink and remove this warning.
+  applets/applets.c:21:2: error: #error Aborting compilation.
+  make[2]: *** [applets/applets.o] Error 1
+==== Thursday, June 11 ====
+Dug into the busybox Makefiles to see if anything obvious was wrong there, but couldn't find anything useful.  Did another clean(er) build of uClibc just to be sure (started from scratch).  Same end results.
+==== Friday, June 12 ====
+Found (apparent) solution to build problems:
+  diff --git a/Makefile b/Makefile
+  index 0dc7109..0bb6699 100644
+  --- a/Makefile
+  +++ b/Makefile
+  @@ -50,7 +50,7 @@ busybox/busybox : busybox/.config
+          uclibc $(MAKE) -C busybox
+   busybox.bp : busybox/busybox $(BOOTPACK)
+  -       $(MAKE) -C busybox install
+  +       uclibc $(MAKE) -C busybox install
+          $(BOOTPACK) -o $@ busybox/_install=/
+   BOOTPACKS += busybox.bp
+This allows the mkbootfs ''make'' to complete; now I have several .bp files, but I am not yet sure how to use them. They seem to be gzip-compressed CPIO archives; presumably they should be loaded as Linux initramfs.
+Booted a generic Linux kernel with all of the .bp files as initrds; this seems to be working, although the root of the filesystem has strange directories like {usr and {var.

Trace:

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