Include path confusion

["Earl Olsen" <earl dot olsen at dilithiumnetworks dot com>]

Hi,

I have built two compilers with cross tools, one for Linux 2.4.21 and
one for Linux 2.6.10.
Here are the gcc -v commands from them:

$ /data/dntools/gnu-i386-linux-2.4.21-v2/bin/i386-linux-g++ -v
Reading specs from
/data/dntools/gnu-i386-linux-2.4.21-v2/lib/gcc-lib/i386-linux/3.2.2/spec
s
Configured with:
/data/dntools/toolmaker/crosstool-0.37/build/i386-linux/gcc-3.2.2-glibc-
2.3.2/gcc-3.2.2/configure --target=i386-linux
--host=i686-host_pc-linux-gnu
--prefix=/data/dntools/gnu-i386-linux-2.4.21-v2
--with-headers=/data/dntools/gnu-i386-linux-2.4.21-v2/i386-linux/include
--with-local-prefix=/data/dntools/gnu-i386-linux-2.4.21-v2/i386-linux
--disable-nls --enable-threads=posix --enable-symvers=gnu
--enable-__cxa_atexit --enable-languages=c,c++ --enable-shared
--enable-c99 --enable-long-long
Thread model: posix
gcc version 3.2.2
$ /data/dntools/gnu-i386-linux-2.6.10-v2/bin/i386-linux-g++ -v
Reading specs from
/data/dntools/gnu-i386-linux-2.6.10-v2/lib/gcc-lib/i386-linux/3.2.2/spec
s
Configured with:
/data/dntools/toolmaker/crosstool-0.37/build/i386-linux/gcc-3.2.2-glibc-
2.3.2/gcc-3.2.2/configure --target=i386-linux
--host=i686-host_pc-linux-gnu
--prefix=/data/dntools/gnu-i386-linux-2.6.10-v2
--with-headers=/data/dntools/gnu-i386-linux-2.6.10-v2/i386-linux/include
--with-local-prefix=/data/dntools/gnu-i386-linux-2.6.10-v2/i386-linux
--disable-nls --enable-threads=posix --enable-symvers=gnu
--enable-__cxa_atexit --enable-languages=c,c++ --enable-shared
--enable-c99 --enable-long-long
Thread model: posix
gcc version 3.2.2

When we compile a user module that includes <linux/i2c.h> with the
2.4.21 compiler, 
it correctly picks up the header from i386-linux/include/linux
directory.
The 2.6.10 compiler gets it from i386-linux/sys-include/linux directory,
and we get an error:

The 2.4.21 compiler:

Reading specs from
/data/dntools/gnu-i386-linux-2.4.21-v2/lib/gcc-lib/i386-linux/3.2.2/spec
s
Configured with:
/data/dntools/toolmaker/crosstool-0.37/build/i386-linux/gcc-3.2.2-glibc-
2.3.2/gcc-3.2.2/configure --target=i386-linux
--host=i686-host_pc-linux-gnu
--prefix=/data/dntools/gnu-i386-linux-2.4.21-v2
--with-headers=/data/dntools/gnu-i386-linux-2.4.21-v2/i386-linux/include
--with-local-prefix=/data/dntools/gnu-i386-linux-2.4.21-v2/i386-linux
--disable-nls --enable-threads=posix --enable-symvers=gnu
--enable-__cxa_atexit --enable-languages=c,c++ --enable-shared
--enable-c99 --enable-long-long
Thread model: posix
gcc version 3.2.2
 
/data/dntools/gnu-i386-linux-2.4.21-v2/lib/gcc-lib/i386-linux/3.2.2/cc1p
lus -v -I/home/siribarne/siribarne_DTG-2.1_int//dtg/common/include
-I/home/siribarne/siribarne_DTG-2.1_int//dtg/apps/HWMgr/include
-I/home/siribarne/siribarne_DTG-2.1_int//dtg/common/include
-I/home/siribarne/siribarne_DTG-2.1_int//pts/Linux/C6410HostLibs/include
-D__GNUC__=3 -D__GNUC_MINOR__=2 -D__GNUC_PATCHLEVEL__=2
-D__GXX_ABI_VERSION=102 -D__ELF__ -Dunix -D__gnu_linux__ -Dlinux
-D__ELF__ -D__unix__ -D__gnu_linux__ -D__linux__ -D__unix -D__linux
-Asystem=posix -D__NO_INLINE__ -D__STDC_HOSTED__=1 -D_GNU_SOURCE
-Acpu=i386 -Amachine=i386 -Di386 -D__i386 -D__i386__ -D__tune_i686__
-D__tune_pentiumpro__ -D__DTG2000__ -DLINUX x.cpp -D__GNUG__=3
-D__DEPRECATED -D__EXCEPTIONS -quiet -dumpbase x.cpp -march=i386
-mcpu=i686 -gdwarf-2 -Wall -Wall -version -o /tmp/ccSJUzJO.s
GNU CPP version 3.2.2 (cpplib) (i386 Linux/ELF)
GNU C++ version 3.2.2 (i386-linux)
	compiled by GNU C version 3.2.3 20030502 (Red Hat Linux
3.2.3-52).
ignoring duplicate directory
"/home/siribarne/siribarne_DTG-2.1_int/dtg/common/include"
#include "..." search starts here:
#include <...> search starts here:
 /home/siribarne/siribarne_DTG-2.1_int/dtg/common/include
 /home/siribarne/siribarne_DTG-2.1_int/dtg/apps/HWMgr/include
 /home/siribarne/siribarne_DTG-2.1_int/pts/Linux/C6410HostLibs/include
 /data/dntools/gnu-i386-linux-2.4.21-v2/include/c++/3.2.2
 /data/dntools/gnu-i386-linux-2.4.21-v2/include/c++/3.2.2/i386-linux
 /data/dntools/gnu-i386-linux-2.4.21-v2/include/c++/3.2.2/backward
 /data/dntools/gnu-i386-linux-2.4.21-v2/include
 
/data/dntools/gnu-i386-linux-2.4.21-v2/lib/gcc-lib/i386-linux/3.2.2/incl
ude
 /data/dntools/gnu-i386-linux-2.4.21-v2/i386-linux/sys-include
 /data/dntools/gnu-i386-linux-2.4.21-v2/i386-linux/include
End of search list.
 
/data/dntools/gnu-i386-linux-2.4.21-v2/lib/gcc-lib/i386-linux/3.2.2/../.
./../../i386-linux/bin/as -V -Qy -o x.o /tmp/ccSJUzJO.s
GNU assembler version 2.14 (i386-linux) using BFD version 2.14 20030612

The 2.6.10 compiler:

Reading specs from
/data/dntools/gnu-i386-linux-2.6.10-v2/lib/gcc-lib/i386-linux/3.2.2/spec
s
Configured with:
/data/dntools/toolmaker/crosstool-0.37/build/i386-linux/gcc-3.2.2-glibc-
2.3.2/gcc-3.2.2/configure --target=i386-linux
--host=i686-host_pc-linux-gnu
--prefix=/data/dntools/gnu-i386-linux-2.6.10-v2
--with-headers=/data/dntools/gnu-i386-linux-2.6.10-v2/i386-linux/include
--with-local-prefix=/data/dntools/gnu-i386-linux-2.6.10-v2/i386-linux
--disable-nls --enable-threads=posix --enable-symvers=gnu
--enable-__cxa_atexit --enable-languages=c,c++ --enable-shared
--enable-c99 --enable-long-long
Thread model: posix
gcc version 3.2.2
 
/data/dntools/gnu-i386-linux-2.6.10-v2/lib/gcc-lib/i386-linux/3.2.2/cc1p
lus -v -I/home/siribarne/siribarne_DTG-2.1_int//dtg/common/include
-I/home/siribarne/siribarne_DTG-2.1_int//dtg/apps/HWMgr/include
-I/home/siribarne/siribarne_DTG-2.1_int//dtg/common/include
-I/home/siribarne/siribarne_DTG-2.1_int//pts/Linux/C6410HostLibs/include
-D__GNUC__=3 -D__GNUC_MINOR__=2 -D__GNUC_PATCHLEVEL__=2
-D__GXX_ABI_VERSION=102 -D__ELF__ -Dunix -D__gnu_linux__ -Dlinux
-D__ELF__ -D__unix__ -D__gnu_linux__ -D__linux__ -D__unix -D__linux
-Asystem=posix -D__NO_INLINE__ -D__STDC_HOSTED__=1 -D_GNU_SOURCE
-Acpu=i386 -Amachine=i386 -Di386 -D__i386 -D__i386__ -D__tune_i686__
-D__tune_pentiumpro__ -D__DTG2000__ -DLINUX x.cpp -D__GNUG__=3
-D__DEPRECATED -D__EXCEPTIONS -quiet -dumpbase x.cpp -march=i386
-mcpu=i686 -gdwarf-2 -Wall -Wall -version -o /tmp/ccMUPYIz.s
GNU CPP version 3.2.2 (cpplib) (i386 Linux/ELF)
GNU C++ version 3.2.2 (i386-linux)
	compiled by GNU C version 3.2.3 20030502 (Red Hat Linux
3.2.3-52).
ignoring duplicate directory
"/home/siribarne/siribarne_DTG-2.1_int/dtg/common/include"
#include "..." search starts here:
#include <...> search starts here:
 /home/siribarne/siribarne_DTG-2.1_int/dtg/common/include
 /home/siribarne/siribarne_DTG-2.1_int/dtg/apps/HWMgr/include
 /home/siribarne/siribarne_DTG-2.1_int/pts/Linux/C6410HostLibs/include
 /data/dntools/gnu-i386-linux-2.6.10-v2/include/c++/3.2.2
 /data/dntools/gnu-i386-linux-2.6.10-v2/include/c++/3.2.2/i386-linux
 /data/dntools/gnu-i386-linux-2.6.10-v2/include/c++/3.2.2/backward
 /data/dntools/gnu-i386-linux-2.6.10-v2/include
 
/data/dntools/gnu-i386-linux-2.6.10-v2/lib/gcc-lib/i386-linux/3.2.2/incl
ude
 /data/dntools/gnu-i386-linux-2.6.10-v2/i386-linux/sys-include
 /data/dntools/gnu-i386-linux-2.6.10-v2/i386-linux/include
End of search list.
In file included from
/data/dntools/gnu-i386-linux-2.6.10-v2/i386-linux/sys-include/linux/modu
le.h:9,
                 from
/data/dntools/gnu-i386-linux-2.6.10-v2/i386-linux/sys-include/linux/i2c.
h:31,
                 from
/home/siribarne/siribarne_DTG-2.1_int/dtg/apps/HWMgr/include/DN_HWM_SMBu
s.h:36,
                 from
/home/siribarne/siribarne_DTG-2.1_int/dtg/apps/HWMgr/include/DN_HWM_GNPC
hassis.h:31,
                 from
/home/siribarne/siribarne_DTG-2.1_int/dtg/apps/HWMgr/include/DN_HWM_Syst
emStats.h:29,
                 from
/home/siribarne/siribarne_DTG-2.1_int/dtg/apps/HWMgr/include/DN_HWM_Host
Card_C5370.h:31,
                 from
/home/siribarne/siribarne_DTG-2.1_int/dtg/apps/HWMgr/include/DN_HWM_Eqpt
HldrTask.h:38,
                 from
/home/siribarne/siribarne_DTG-2.1_int/dtg/apps/HWMgr/include/DN_HWM_Appl
ication.h:45,
                 from x.cpp:2:
/data/dntools/gnu-i386-linux-2.6.10-v2/i386-linux/sys-include/linux/conf
ig.h:4:28: linux/autoconf.h: No such file or directory


Any clues what is wrong?

Thanks


--
Earl Olsen
Senior Software Engineer
Dilithium Networks, Inc.
TEL:+1 707-792-3925
earl.olsen@dilithiumnetworks.com
www.dilithiumnetworks.com

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