[Bug bootstrap/22479] New: Use of --prefix and --exec-prefix breaks compiler build with --with-headers

[joachim dot zaers at web dot de]

configure --prefix=/toolchain --exec-prefix=/toolchain/win32
--with-headers=/src/newlib-1.13.0/newlib/libc/include ....

make all-gcc

dieds when building crtbegin.o due to missing header files.

Looking into the build scripts:
I see that the header files from newlib are copied to
/toolchain/arm-elf/sys-include.

But the compile statement is using 
-isystem /toolchain/win32/arm-elf/sys-include (the EXEC_PREFIX path).

So there is a mismatch in using for PREFIX and EXEC_PREFIX for 
externally provided header files.

This should be valid for any build using with-headers and specifying a
exec-prefix.


WORKAROUNDs:
ln -s /toolchain/arm-elf/sys-include /toolchain/win32/arm-elf/sys-include

or 

don't use --exec-prefix.

-- 
           Summary: Use of --prefix and --exec-prefix breaks compiler build
                    with --with-headers
           Product: gcc
           Version: 4.0.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: joachim dot zaers at web dot de
                CC: gcc-bugs at gcc dot gnu dot org
  GCC host triplet: i386-unknown-cygwin
GCC target triplet: arm-unknown-elf


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22479