[oe] KERNEL_INCLUDES in uClibc.

[Mikael Rosbacke]

Good day.

I'm currently trying to get a uClibc based minimal image for x86 to
build and have some problems with it. I'm using DISTRO='minimal-uclibc'
and MACHINE='x86' and trying to build the target 'minimal-image'.

I get a failed build on the packet uclibc-initial. I tried doing the
install stage which went fine. But with the command:
  bitbake -b uclibc-initial_0.9.30 -c build -D -D

I get:
...
# Remove ifaddrs.h since the corresponding functionality is disabled
rm
-f /home/mikaelr/oe/tmp/staging/i486-linux-uclibc/usr/include/ifaddrs.h
  AS lib/crt1.o
CROSS COMPILE Badness: /usr/include in INCLUDEPATH: /usr/include/
cc1: internal compiler error: in add_path, at c-incpath.c:362
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
make: *** [lib/crt1.o] Error 1
DEBUG:
Parsing /home/mikaelr/oe/openembedded/packages/uclibc/uclibc-initial_0.9.30.bb (full)
DEBUG:
BB /home/mikaelr/oe/openembedded/packages/uclibc/uclibc-initial_0.9.30.bb: handle(data)
DEBUG: BB uclibc_0.9.30.bb: handle(data, include)
DEBUG: BB uclibc.inc: handle(data, include)
DEBUG: update_data()
DEBUG: update_data()
DEBUG: update_data()
NOTE: package uclibc-initial-0.9.30: started
...

It seems gcc is complaining about trying to include host system headers
while cross compiling. I managed to reproduce the error in a normal
build from the uclibc tarball using the i486 compiler built with the oe
toolchain.

The uclibc accepts another make variable KERNEL_HEADERS. I've modified
the tree according to this patch:

mikaelr at akaza1:~/oe/openembedded$ git diff
diff --git a/packages/uclibc/uclibc-initial_0.9.30.bb
b/packages/uclibc/uclibc-initial_0.9.30.bb
index c56e5fb..679a55e 100644
--- a/packages/uclibc/uclibc-initial_0.9.30.bb
+++ b/packages/uclibc/uclibc-initial_0.9.30.bb
@@ -9,13 +9,18 @@ PACKAGES = ""
 
 do_stage() {
        # Install initial headers into the cross dir
+       echo "Hello!" 
        make PREFIX= DEVEL_PREFIX=${UCLIBC_STAGE_PREFIX}/ \
                RUNTIME_PREFIX=${UCLIBC_STAGE_PREFIX}/ \
+
KERNEL_HEADERS=/home/mikaelr/oe/tmp/work/i486-linux-uclibc/linux-libc-headers-2.6.23-r3/image/usr/include/ \
                pregen install_dev
+       echo "Hello2!" 
        make PREFIX= DEVEL_PREFIX=${UCLIBC_STAGE_PREFIX}/ \
                RUNTIME_PREFIX=${UCLIBC_STAGE_PREFIX}/ \
+               KERNEL_HEADERS=
${WORKDIR}/i486-linux-uclibc/linux-libc-headers-2.6.23-r3/image/usr/include/ \
                lib/crt1.o lib/crti.o lib/crtn.o
 
+       echo "Hello3!" 
        install -d ${CROSS_DIR}/${TARGET_SYS}   
        ln -sf include ${CROSS_DIR}/${TARGET_SYS}/sys-include
 
diff --git a/packages/uclibc/uclibc.inc b/packages/uclibc/uclibc.inc
index 9b27e1f..5f8d15d 100644
--- a/packages/uclibc/uclibc.inc
+++ b/packages/uclibc/uclibc.inc
@@ -147,6 +147,7 @@ do_configure() {
 }
 
 do_stage() {
+       echo "Hello4!" 
        # This MUST be done first because we
        # will install crt1.o in the install_dev stage and gcc needs it
 
mikaelr at akaza1:~/oe/openembedded$ 

The build error changes to:
...
# Remove ifaddrs.h since the corresponding functionality is disabled
rm
-f /home/mikaelr/oe/tmp/staging/i486-linux-uclibc/usr/include/ifaddrs.h
  AS lib/crt1.o
libc/sysdeps/linux/alpha/crt1.S: Assembler messages:
libc/sysdeps/linux/alpha/crt1.S:43: Error: alignment not a power of 2
libc/sysdeps/linux/alpha/crt1.S:45: Error: unknown pseudo-op: `.ent'
libc/sysdeps/linux/alpha/crt1.S:57: Error: unknown pseudo-op: `.frame'
libc/sysdeps/linux/alpha/crt1.S:58: Error: no such instruction: `br
$29,1f'
libc/sysdeps/linux/alpha/crt1.S:59: Error: no such instruction: `ldgp
$29,0($29)'
libc/sysdeps/linux/alpha/crt1.S:60: Error: suffix or operands invalid
for `sub'
libc/sysdeps/linux/alpha/crt1.S:61: Error: suffix or operands invalid
for `mov'
libc/sysdeps/linux/alpha/crt1.S:62: Error: unknown pseudo-op:
`.prologue'
libc/sysdeps/linux/alpha/crt1.S:65: Error: no such instruction: `lda
$16,main'
libc/sysdeps/linux/alpha/crt1.S:67: Error: no such instruction: `ldl
$17,16($30)'
libc/sysdeps/linux/alpha/crt1.S:68: Error: no such instruction: `lda
$18,24($30)'
libc/sysdeps/linux/alpha/crt1.S:71: Error: no such instruction: `lda
$19,_init'
libc/sysdeps/linux/alpha/crt1.S:72: Error: no such instruction: `lda
$20,_fini'
libc/sysdeps/linux/alpha/crt1.S:75: Error: suffix or operands invalid
for `mov'
libc/sysdeps/linux/alpha/crt1.S:78: Error: no such instruction: `stq
$30,0($30)'
libc/sysdeps/linux/alpha/crt1.S:82: Error: no such instruction: `jsr
$26,__uClibc_main'
libc/sysdeps/linux/alpha/crt1.S:86: Error: invalid character '_' in
mnemonic
make: *** [lib/crt1.o] Error 1
ERROR: function do_stage failed
ERROR: see log
in /home/mikaelr/oe/tmp/work/x86-linux-uclibc/uclibc-initial-0.9.30-r0/temp/log.do_stage.4580
...

Of some reason, the uclibc want to build the alpha version which, by
coincidence is the first target listed when manually configuring the
uclibc sources. I would suspect there is a missing configuration at this
stage.

In the log, I can see the 'Hello1' message but not the second one so it
should be the first make command failing.

Is this a known issue and is there a simple workaround for this? It
seems to be the type of thing that would hit more ppl than me. I've done
the initial build with gcc 4.3 but also had it with a manually built
native toolchain for 4.1.2.

Is it worthwhile to continue along this path or is there a better way to
get an x86 uclibc image using open embedded?

Thanks in advance for any advice.

--- Mikael R