Compiling GCC for linux with no /usr/include

["Casey Allen Shobe" <cshobe at osss dot net>]

Greetings all,

I'm attempting to build GCC on a custom linux system that does not feature
a /usr directory.  Specifically, this means it does not have /usr/include,
but rather /include.  I'm running into an error, which I'm able to
workaround, but looking for a way to compile cleanly as I'd like to
automate this process, and stop if there are any unexpected errors.

I've tried the following configure arguments:

--prefix= --exec-prefix= --bindir=/bin --sbindir=/bin --libdir=/lib
--libexecdir=/libexec --datadir=/share --localstatedir=/var
--includedir=/include --oldincludedir=/include --infodir=/share/info
--mandir=/share/man --sysconfdir=/etc/gcc --enable-shared --disable-static
--with-slibdir=/lib --enable-threads=posix --enable-__cxa_atexit
--enable-clocale=gnu --enable-languages=c,c++

However, when issuing a make command following this, I get an error,
specifically:

chmod 755 ../fixinc.sh
make[2]: Leaving directory `/share/src/gcc/build/gcc/fixinc'
The directory that should contain system headers does not exist:
  /usr/include
make[1]: *** [stmp-fixinc] Error 1
make[1]: Leaving directory `/share/src/gcc/build/gcc'
make: *** [all-gcc] Error 2

I found by looking at gcc/Makefile that I could workaround this problem
with 'cd gcc; make NATIVE_SYSTEM_HEADER_DIR=/include; cd ..; make

I found that trying 'make NATIVE_SYSTEM_HEADER_DIR=/include' in the root
of the build directory does not work, and I cannot precompile the gcc
directory using the manual variable setting since it does not exist until
I run the 'make' command which fails the first time.

I would like to find a way to cleanly compile gcc without any errors.  Any
advice is greatly appreciated!

-- 
Casey Allen Shobe  |  http://casey.allen.shobe.info
  cshobe@osss.net  |  ICQ: 1494523  |  AIM: SomeLinuxGuy