Hi,
I build gcc (4.5.2) from scratch, and i have a question with include
path.
when i want to include "limits.h" (the good one is at
/LFS2011/include/limits.h), gcc uses
/LFS2011/bin/../lib/gcc/i686-pc-linux-gnu/4.5.1/include-fixed/limits.h
When i add "-I/LFS2011/include" it does not look for
/LFS2011/include/limits.h (bad ?) but when I add "-I/tmp", it looks for
/tmp/limits.h (good)
What is wrong, where can i look into gcc source code to debug it ?
Thank you.
Yann Le DoarÃ
***************************************
my test.c :
#include "limits.h"
int main()
{
}
*******************************************************************
strace -f -e open -o logs gcc -I/LFS2011/include test.c
bash-3.2# grep limits.h logs
5469 open("limits.h", O_RDONLY|O_NOCTTY) = -1 ENOENT (No such file or
directory)
5469
open("/LFS2011/bin/../lib/gcc/i586-pc-linux/4.5.2/include/limits.h",
O_RDONLY|O_NOCTTY) = -1 ENOENT (No such file or directory)
5469
open("/LFS2011/bin/../lib/gcc/i586-pc-linux/4.5.2/include-fixed/limits.h",
O_RDONLY|O_NOCTTY) = 4
*****************************************************
strace -f -e open -o logs gcc -I/tmp test.c
grep limits.h logs
5460 open("limits.h", O_RDONLY|O_NOCTTY) = -1 ENOENT (No such file or
directory)
5460 open("/tmp/limits.h", O_RDONLY|O_NOCTTY) = -1 ENOENT (No such
file or directory)
5460
open("/LFS2011/bin/../lib/gcc/i586-pc-linux/4.5.2/include/limits.h",
O_RDONLY|O_NOCTTY) = -1 ENOENT (No such file or directory)
5460
open("/LFS2011/bin/../lib/gcc/i586-pc-linux/4.5.2/include-fixed/limits.h",
O_RDONLY|O_NOCTTY) = 4
*******************************************************
The options to build gcc (from LFS script) :
*********************************************
--prefix=/LFS2011 \
--with-local-prefix=/LFS2011 --enable-clocale=gnu \
--enable-shared --enable-threads=posix \
--enable-__cxa_atexit --enable-languages=c,c++ \
--disable-libstdcxx-pch --disable-multilib \
--disable-bootstrap --disable-libgomp \
--with-gmp=/LFS2011 --with-mpfr=/LFS2011 --with-mpc=/LFS2011 \
--without-ppl --without-cloog --target=$LFS_TGT --host=$LFS_TGT
--build=$LFS_TGT
