[Buildroot] uClibc missing limits.h

[Hinko Kocevar <hinko.kocevar@cetrtapot.si>]

Hinko Kocevar wrote:
> Bernhard Fischer wrote:
>> On Mon, Jun 23, 2008 at 02:22:25PM +0200, Hinko Kocevar wrote:
>>> Hi,
>>>
>>> I've found a way for uClibc to find headers that are not in the $(shell $CC -print-file-name=include), but in $(shell $CC -print-file-name=include)-fixed.
>>> According to http://sourceware.org/ml/libc-alpha/2007-03/msg00017.html LIBC should also look in other gcc provided header directories (eg. include-fixed) instead only relying on 'include' to contain all correct headers.
>>>
>>> Below is uClibc patch for this (tested on cris).
>> Well, that's not really correct since the default search path already
>> should to be
>> $target_triple/$ver/include \
>> $target_triple/$ver/include-fixed \
>>

It is not if -nostdinc is in the compiler command line (see below).

>> And apart from that you would not get away with just doing this for uClibc..
>>
>> Please paste the failing "cross-gcc -v" invocation that fails to find
>> the include-fixed.
> 

Here the compiler line that fails to find include-fixed:

hinkok at alala /work/stage/buildroot/toolchain_build_cris/uClibc-0.9.29 $ /work/stage/buildroot/build_cris/staging_dir/usr/bin/cris-linux-uclibc-gcc -c libc/sysdeps/linux/common/chdir.c -o libc/sysdeps/linux/common/chdir.os -include ./include/libc-symbols.h -Wall -Wstrict-prototypes -fno-strict-aliasing -fno-stack-protector -fno-builtin -nostdinc -I./include -I. --sysroot=/work/stage/buildroot/build_cris/staging_dir/ -isysroot /work/stage/buildroot/build_cris/staging_dir -I=/usr/include -Os -pipe -I/work/stage/buildroot/build_cris/staging_dir/usr/include -mtune=v10 -march=v10 -std=gnu99 -Os -funit-at-a-time -fno-tree-loop-optimize -fno-tree-dominator-opts -fno-strength-reduce -I./libpthread/linuxthreads.old/sysdeps/unix/sysv/linux/cris -I./libpthread/linuxthreads.old/sysdeps/cris -I./libpthread/linuxthreads.old/sysdeps/unix/sysv/linux -I./libpthread/linuxthreads.old/sysdeps/pthread -I./libpthread/linuxthreads.old -I./libpthread -I/work/stage/buildroot/toolchain_build_cris/linux
/include/ -isystem /work/stage/buildroot/build_cris/staging_dir/usr/lib/gcc/cris-linux-uclibc/4.3.1/include -DNDEBUG -fpic -v
Using built-in specs.
Target: cris-linux-uclibc
Configured with: /work/stage/buildroot/toolchain_build_cris/gcc-4.3.1/configure --prefix=/work/stage/buildroot/build_cris/staging_dir/usr --build=i386-pc-linux-gnu --host=i386-pc-linux-gnu --target=cris-linux-uclibc --enable-languages=c --with-sysroot=/work/stage/buildroot/toolchain_build_cris/uClibc_dev/ --disable-__cxa_atexit --enable-target-optspace --with-gnu-ld --disable-shared --with-gmp=/work/stage/buildroot/toolchain_build_cris/gmp --with-mpfr=/work/stage/buildroot/toolchain_build_cris/mpfr --enable-threads --disable-multilib --disable-libssp --disable-libssp --disable-libmudflap --disable-libgomp
Thread model: posix
gcc version 4.3.1 (GCC) 
COLLECT_GCC_OPTIONS='-c' '-o' 'libc/sysdeps/linux/common/chdir.os' '-include' './include/libc-symbols.h' '-Wall' '-Wstrict-prototypes' '-fno-strict-aliasing' '-fno-stack-protector' '-fno-builtin' '-nostdinc' '-I./include' '-I.' '-isysroot' '/work/stage/buildroot/build_cris/staging_dir' '-I=/usr/include' '-Os' '-pipe' '-I/work/stage/buildroot/build_cris/staging_dir/usr/include' '-mtune=v10' '-march=v10' '-std=gnu99' '-Os' '-funit-at-a-time' '-fno-tree-loop-optimize' '-fno-tree-dominator-opts' '-fno-strength-reduce' '-I./libpthread/linuxthreads.old/sysdeps/unix/sysv/linux/cris' '-I./libpthread/linuxthreads.old/sysdeps/cris' '-I./libpthread/linuxthreads.old/sysdeps/unix/sysv/linux' '-I./libpthread/linuxthreads.old/sysdeps/pthread' '-I./libpthread/linuxthreads.old' '-I./libpthread' '-I/work/stage/buildroot/toolchain_build_cris/linux/include/' '-isystem' '/work/stage/buildroot/build_cris/staging_dir/usr/lib/gcc/cris-linux-uclibc/4.3.1/include' '-DNDEBUG' '-fpic' '-v'
 /work/stage/buildroot/build_cris/staging_dir/usr/libexec/gcc/cris-linux-uclibc/4.3.1/cc1 -quiet -nostdinc -v -I./include -I. -I=/usr/include -I/work/stage/buildroot/build_cris/staging_dir/usr/include -I./libpthread/linuxthreads.old/sysdeps/unix/sysv/linux/cris -I./libpthread/linuxthreads.old/sysdeps/cris -I./libpthread/linuxthreads.old/sysdeps/unix/sysv/linux -I./libpthread/linuxthreads.old/sysdeps/pthread -I./libpthread/linuxthreads.old -I./libpthread -I/work/stage/buildroot/toolchain_build_cris/linux/include/ -isysroot /work/stage/buildroot/build_cris/staging_dir/ -D__tune_v10 -D__CRIS_arch_tune=10 -D__arch_v10 -D__CRIS_arch_version=10 -DNDEBUG -include ./include/libc-symbols.h -isysroot /work/stage/buildroot/build_cris/staging_dir -isystem /work/stage/buildroot/build_cris/staging_dir/usr/lib/gcc/cris-linux-uclibc/4.3.1/include libc/sysdeps/linux/common/chdir.c -quiet -dumpbase chdir.c -mtune=v10 -march=v10 -auxbase-strip libc/sysdeps/linux/common/chdir.os -Os -Os -Wall -W
strict-prototypes -std=gnu99 -version -fno-strict-aliasing -fno-stack-protector -fno-builtin -funit-at-a-time -fno-tree-loop-optimize -fno-tree-dominator-opts -fno-strength-reduce -fpic -o - |
 /work/stage/buildroot/build_cris/staging_dir/usr/lib/gcc/cris-linux-uclibc/4.3.1/../../../../cris-linux-uclibc/bin/as -v --em=criself --no-underscore --pic -o libc/sysdeps/linux/common/chdir.os -
GNU assembler version 2.18 (cris-linux-uclibc) using BFD version (GNU Binutils) 2.18
ignoring duplicate directory "/work/stage/buildroot/build_cris/staging_dir/usr/include"
ignoring nonexistent directory "./libpthread/linuxthreads.old/sysdeps/unix/sysv/linux/cris"
ignoring nonexistent directory "./libpthread/linuxthreads.old/sysdeps/unix/sysv/linux"
#include "..." search starts here:
#include <...> search starts here:
 ./include
 .
 /work/stage/buildroot/build_cris/staging_dir/usr/include
 ./libpthread/linuxthreads.old/sysdeps/cris
 ./libpthread/linuxthreads.old/sysdeps/pthread
 ./libpthread/linuxthreads.old
 ./libpthread
 /work/stage/buildroot/toolchain_build_cris/linux/include/
 /work/stage/buildroot/build_cris/staging_dir/usr/lib/gcc/cris-linux-uclibc/4.3.1/include
End of search list.
GNU C (GCC) version 4.3.1 (cris-linux-uclibc)
	compiled by GNU C version 4.1.2 (Gentoo 4.1.2 p1.1), GMP version 4.2.2, MPFR version 2.3.1.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 8d9cd5fbd7efd311d4ba9389bc2ae5b7
In file included from ./include/sys/param.h:22,
                 from libc/sysdeps/linux/common/chdir.c:13:
./include/limits.h:124:26: error: limits.h: No such file or directory


Quick fix was to remove the '-nostdinc' flag, the include-fixed is also seen in the includes list:

hinkok at alala /work/stage/buildroot/toolchain_build_cris/uClibc-0.9.29 $ /work/stage/buildroot/build_cris/staging_dir/usr/bin/cris-linux-uclibc-gcc -c libc/sysdeps/linux/common/chdir.c -o libc/sysdeps/linux/common/chdir.os -include ./include/libc-symbols.h -Wall -Wstrict-prototypes -fno-strict-aliasing -fno-stack-protector -fno-builtin -I./include -I. --sysroot=/work/stage/buildroot/build_cris/staging_dir/ -isysroot /work/stage/buildroot/build_cris/staging_dir -I=/usr/include -Os -pipe -I/work/stage/buildroot/build_cris/staging_dir/usr/include -mtune=v10 -march=v10 -std=gnu99 -Os -funit-at-a-time -fno-tree-loop-optimize -fno-tree-dominator-opts -fno-strength-reduce -I./libpthread/linuxthreads.old/sysdeps/unix/sysv/linux/cris -I./libpthread/linuxthreads.old/sysdeps/cris -I./libpthread/linuxthreads.old/sysdeps/unix/sysv/linux -I./libpthread/linuxthreads.old/sysdeps/pthread -I./libpthread/linuxthreads.old -I./libpthread -I/work/stage/buildroot/toolchain_build_cris/linux/include/ 
-isystem /work/stage/buildroot/build_cris/staging_dir/usr/lib/gcc/cris-linux-uclibc/4.3.1/include -DNDEBUG -fpic -v
Using built-in specs.
Target: cris-linux-uclibc
Configured with: /work/stage/buildroot/toolchain_build_cris/gcc-4.3.1/configure --prefix=/work/stage/buildroot/build_cris/staging_dir/usr --build=i386-pc-linux-gnu --host=i386-pc-linux-gnu --target=cris-linux-uclibc --enable-languages=c --with-sysroot=/work/stage/buildroot/toolchain_build_cris/uClibc_dev/ --disable-__cxa_atexit --enable-target-optspace --with-gnu-ld --disable-shared --with-gmp=/work/stage/buildroot/toolchain_build_cris/gmp --with-mpfr=/work/stage/buildroot/toolchain_build_cris/mpfr --enable-threads --disable-multilib --disable-libssp --disable-libssp --disable-libmudflap --disable-libgomp
Thread model: posix
gcc version 4.3.1 (GCC) 
COLLECT_GCC_OPTIONS='-c' '-o' 'libc/sysdeps/linux/common/chdir.os' '-include' './include/libc-symbols.h' '-Wall' '-Wstrict-prototypes' '-fno-strict-aliasing' '-fno-stack-protector' '-fno-builtin' '-I./include' '-I.' '-isysroot' '/work/stage/buildroot/build_cris/staging_dir' '-I=/usr/include' '-Os' '-pipe' '-I/work/stage/buildroot/build_cris/staging_dir/usr/include' '-mtune=v10' '-march=v10' '-std=gnu99' '-Os' '-funit-at-a-time' '-fno-tree-loop-optimize' '-fno-tree-dominator-opts' '-fno-strength-reduce' '-I./libpthread/linuxthreads.old/sysdeps/unix/sysv/linux/cris' '-I./libpthread/linuxthreads.old/sysdeps/cris' '-I./libpthread/linuxthreads.old/sysdeps/unix/sysv/linux' '-I./libpthread/linuxthreads.old/sysdeps/pthread' '-I./libpthread/linuxthreads.old' '-I./libpthread' '-I/work/stage/buildroot/toolchain_build_cris/linux/include/' '-isystem' '/work/stage/buildroot/build_cris/staging_dir/usr/lib/gcc/cris-linux-uclibc/4.3.1/include' '-DNDEBUG' '-fpic' '-v'
 /work/stage/buildroot/build_cris/staging_dir/usr/libexec/gcc/cris-linux-uclibc/4.3.1/cc1 -quiet -v -I./include -I. -I=/usr/include -I/work/stage/buildroot/build_cris/staging_dir/usr/include -I./libpthread/linuxthreads.old/sysdeps/unix/sysv/linux/cris -I./libpthread/linuxthreads.old/sysdeps/cris -I./libpthread/linuxthreads.old/sysdeps/unix/sysv/linux -I./libpthread/linuxthreads.old/sysdeps/pthread -I./libpthread/linuxthreads.old -I./libpthread -I/work/stage/buildroot/toolchain_build_cris/linux/include/ -isysroot /work/stage/buildroot/build_cris/staging_dir/ -D__tune_v10 -D__CRIS_arch_tune=10 -D__arch_v10 -D__CRIS_arch_version=10 -DNDEBUG -include ./include/libc-symbols.h -isysroot /work/stage/buildroot/build_cris/staging_dir -isystem /work/stage/buildroot/build_cris/staging_dir/usr/lib/gcc/cris-linux-uclibc/4.3.1/include libc/sysdeps/linux/common/chdir.c -quiet -dumpbase chdir.c -mtune=v10 -march=v10 -auxbase-strip libc/sysdeps/linux/common/chdir.os -Os -Os -Wall -Wstrict-pro
totypes -std=gnu99 -version -fno-strict-aliasing -fno-stack-protector -fno-builtin -funit-at-a-time -fno-tree-loop-optimize -fno-tree-dominator-opts -fno-strength-reduce -fpic -o - |
 /work/stage/buildroot/build_cris/staging_dir/usr/lib/gcc/cris-linux-uclibc/4.3.1/../../../../cris-linux-uclibc/bin/as -v --em=criself --no-underscore --pic -o libc/sysdeps/linux/common/chdir.os -
GNU assembler version 2.18 (cris-linux-uclibc) using BFD version (GNU Binutils) 2.18
ignoring nonexistent directory "/work/stage/buildroot/build_cris/staging_dir/usr/local/include"
ignoring duplicate directory "/work/stage/buildroot/build_cris/staging_dir/usr/lib/gcc/cris-linux-uclibc/4.3.1/include"
ignoring nonexistent directory "/work/stage/buildroot/build_cris/staging_dir/usr/lib/gcc/cris-linux-uclibc/4.3.1/../../../../cris-linux-uclibc/include"
ignoring duplicate directory "/work/stage/buildroot/build_cris/staging_dir/usr/include"
  as it is a non-system directory that duplicates a system directory
ignoring duplicate directory "/work/stage/buildroot/build_cris/staging_dir/usr/include"
  as it is a non-system directory that duplicates a system directory
ignoring nonexistent directory "./libpthread/linuxthreads.old/sysdeps/unix/sysv/linux/cris"
ignoring nonexistent directory "./libpthread/linuxthreads.old/sysdeps/unix/sysv/linux"
#include "..." search starts here:
#include <...> search starts here:
 ./include
 .
 ./libpthread/linuxthreads.old/sysdeps/cris
 ./libpthread/linuxthreads.old/sysdeps/pthread
 ./libpthread/linuxthreads.old
 ./libpthread
 /work/stage/buildroot/toolchain_build_cris/linux/include/
 /work/stage/buildroot/build_cris/staging_dir/usr/lib/gcc/cris-linux-uclibc/4.3.1/include
 /work/stage/buildroot/build_cris/staging_dir/usr/lib/gcc/cris-linux-uclibc/4.3.1/include-fixed
 /work/stage/buildroot/build_cris/staging_dir/usr/include
End of search list.
GNU C (GCC) version 4.3.1 (cris-linux-uclibc)
	compiled by GNU C version 4.1.2 (Gentoo 4.1.2 p1.1), GMP version 4.2.2, MPFR version 2.3.1.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 8d9cd5fbd7efd311d4ba9389bc2ae5b7
COMPILER_PATH=/work/stage/buildroot/build_cris/staging_dir/usr/libexec/gcc/cris-linux-uclibc/4.3.1/:/work/stage/buildroot/build_cris/staging_dir/usr/libexec/gcc/cris-linux-uclibc/4.3.1/:/work/stage/buildroot/build_cris/staging_dir/usr/libexec/gcc/cris-linux-uclibc/:/work/stage/buildroot/build_cris/staging_dir/usr/lib/gcc/cris-linux-uclibc/4.3.1/:/work/stage/buildroot/build_cris/staging_dir/usr/lib/gcc/cris-linux-uclibc/:/work/stage/buildroot/build_cris/staging_dir/usr/lib/gcc/cris-linux-uclibc/4.3.1/../../../../cris-linux-uclibc/bin/
LIBRARY_PATH=/work/stage/buildroot/build_cris/staging_dir/usr/lib/gcc/cris-linux-uclibc/4.3.1/:/work/stage/buildroot/build_cris/staging_dir/usr/lib/gcc/cris-linux-uclibc/4.3.1/../../../../cris-linux-uclibc/lib/:/work/stage/buildroot/build_cris/staging_dir//lib/:/work/stage/buildroot/build_cris/staging_dir//usr/lib/
COLLECT_GCC_OPTIONS='-c' '-o' 'libc/sysdeps/linux/common/chdir.os' '-include' './include/libc-symbols.h' '-Wall' '-Wstrict-prototypes' '-fno-strict-aliasing' '-fno-stack-protector' '-fno-builtin' '-I./include' '-I.' '-isysroot' '/work/stage/buildroot/build_cris/staging_dir' '-I=/usr/include' '-Os' '-pipe' '-I/work/stage/buildroot/build_cris/staging_dir/usr/include' '-mtune=v10' '-march=v10' '-std=gnu99' '-Os' '-funit-at-a-time' '-fno-tree-loop-optimize' '-fno-tree-dominator-opts' '-fno-strength-reduce' '-I./libpthread/linuxthreads.old/sysdeps/unix/sysv/linux/cris' '-I./libpthread/linuxthreads.old/sysdeps/cris' '-I./libpthread/linuxthreads.old/sysdeps/unix/sysv/linux' '-I./libpthread/linuxthreads.old/sysdeps/pthread' '-I./libpthread/linuxthreads.old' '-I./libpthread' '-I/work/stage/buildroot/toolchain_build_cris/linux/include/' '-isystem' '/work/stage/buildroot/build_cris/staging_dir/usr/lib/gcc/cris-linux-uclibc/4.3.1/include' '-DNDEBUG' '-fpic' '-v'

Again, according to the http://sourceware.org/ml/libc-alpha/2007-03/msg00017.html this can be fixed by adding include-fixed to the compiler flags via -isystem. If it is enough only for uClibc build I can't tell..

Regards,
Hinko

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