Help - 'make' errors dealing with Kernel Source - all my kernel source code, old and new

[Adam D]

Erik Christiansen wrote:
<snip>
> 
> Please run gcc with the additional option:  -v
> You can do this globally by adding it to the "CFLAGS=..." line that
> should be in the early part of the relevant makefile. (The kernel's big,
> nd I fear that it might use recursive make. So:
> 
I did a grep -n of CFLAGS

 ../src/linux # grep -n CFLAGS Makefile
188:HOSTCFLAGS  = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
293:CFLAGS_MODULE   = $(MODFLAGS)
296:CFLAGS_KERNEL       =
308:CFLAGS              := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
317:    ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
322:export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
467:CFLAGS              += -Os
469:CFLAGS              += -O2
473:CFLAGS              += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
475:CFLAGS              += -fomit-frame-pointer
479:CFLAGS              += -fasynchronous-unwind-tables
483:CFLAGS              += -g
493:CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
496:CFLAGS += $(call cc-option,-Wno-pointer-sign,)

To which CFLAGS do I add the -v to in the Makefile in /usr/src/linux directory?

> $ egrep -nr mcconf.o scripts       # To find the makefile dependency entry.

I did this on the command line and it just returned the prompt without any output to the screen.

> 
> Hopefully, that'll list a "makefile" near kconfig. Add -v to CFLAGS in
> only this makefile. Note:  It may be called "Makefile". )
> 
> Before running make, record output to a file, with:
> 
> $ script /tmp/fred  
> 
> Run make. The verbose output should now include the path used for
> include files. Control-D ends recording to /tmp/fred, where it's easier
> to search than in the xterm.
> 
>> grepping EINTR I found this:
>>                                 if (errno == EINTR || errno == EAGAIN)
> 
> Nope, you're looking in the source code, which _uses_ the #defines. You
> need to look in the header which defines them. :-)

Now since this is a vanilla kernel I have never had kernel headers.  The only time I had kernel headers with the kernel source was installed from the distributer.  

> 
>> Ummmm, I am showing my lack of programing knowledge here, what is EAGAIN? 
> 
> They are just standard numeric values for common run-time error
> conditions.
> 
>>> Can you post the #includes at the top of scripts/kconfig/mconf.c?
>>> If the include is there, then your include path probably needs tweaking.
>> #include <sys/ioctl.h>
>> #include <sys/wait.h>
>> #include <ctype.h>
>> #include <errno.h>
>> #include <fcntl.h>
>> #include <limits.h>
>> #include <signal.h>
>> #include <stdarg.h>
>> #include <stdlib.h>
>> #include <string.h>
>> #include <termios.h>
>> #include <unistd.h>
>> #include <locale.h>
>>
>> #define LKC_DIRECT_LINK
>> #include "lkc.h"
>>
> 
> OK, what had to be (for others to build the kernel) is confirmed. The
> requisite header is included. Your include path is bung.
> 
> Now, before we go further, there's not an earlier error is there, saying
> ------------------------------------------------------------------------
> something remotely like ".../.../errno.h: File not found" ??
> ------------------------------------------------------------
> 

Unfortunly there is not.  The errors I had posted was the only outup to the term right after I did a make oldconfig

> Because EINTR should not be undefined if any flavour of errno.h is
> actually included when gcc compiles mconf.c. This  means that there
> should have been an earlier error message in the compiler output. (Maybe
> a thousand lines earlier, if you're building the whole kernel? Search for
> errno.h from the top of our "script" output.)
> 
>> So, it does look like the new 2.6.17.1 code has a bit minor issue with me. 
> 
> Nah, if that humungous kernel mostly builds, just complaining about one
> measly header file, then it likes you, and is only teasing. ;-)
> 
>> I do hope that helps...and thank you very much :).
> 
> No worries. :-)
> 
> A last hint. The start of output from 
> "gcc -v scripts/kconfig/mconf.c ..." should roughly be along the lines of:
Is that 'gcc -v scripts/kconfig/mconf.c' ran in the term?  I did and it gives me the version of gcc and then the same errors at the end.

> 
> ignoring nonexistent directory "/usr/local/include/i486-linux-gnu"
> ignoring nonexistent directory "/usr/include/i486-linux-gnu"
> #include "..." search starts here:
> #include <...> search starts here:
>  /usr/local/include
>  /usr/lib/gcc/i486-linux-gnu/4.0.2/include
>  /usr/include
> End of search list.
> 
> If any  errno.h was really used to compile mcconf.c, it will be in a
> path in the <...> part of the list.

 ../src/linux # gcc -v scripts/kconfig/mconf.c
Using built-in specs.
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --enable-languages=c,c++,java,f95,objc,ada,treelang --prefix=/usr --enable-shared --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --enable-nls --program-suffix=-4.0 --enable-__cxa_atexit --enable-clocale=gnu --enable-libstdcxx-debug --enable-java-awt=gtk-default --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.4.2-gcj-4.0-1.4.2.0/jre --enable-mpfr --disable-werror --enable-checking=release x86_64-linux-gnu
Thread model: posix
gcc version 4.0.3 (Ubuntu 4.0.3-1ubuntu5)
 /usr/lib/gcc/x86_64-linux-gnu/4.0.3/cc1 -quiet -v scripts/kconfig/mconf.c -quiet -dumpbase mconf.c -mtune=k8 -auxbase mconf -version -o /tmp/ccsT7Cvx.s
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory "/usr/include/x86_64-linux-gnu"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/include
 /usr/lib/gcc/x86_64-linux-gnu/4.0.3/include
 /usr/include
End of search list.
GNU C version 4.0.3 (Ubuntu 4.0.3-1ubuntu5) (x86_64-linux-gnu)
        compiled by GNU C version 4.0.3 (Ubuntu 4.0.3-1ubuntu5).
GGC heuristics: --param ggc-min-expand=98 --param ggc-min-heapsize=128106
scripts/kconfig/mconf.c: In function 'exec_conf':
scripts/kconfig/mconf.c:488: error: 'EINTR' undeclared (first use in this function)
scripts/kconfig/mconf.c:488: error: (Each undeclared identifier is reported only once
scripts/kconfig/mconf.c:488: error: for each function it appears in.)
scripts/kconfig/mconf.c:488: error: 'EAGAIN' undeclared (first use in this function)


It does not look like it is there.  So, I am taking it that it is a config somewhere in my source?  

-Adam