YunQiang Su <s...@gcc.gnu.org> 于2024年6月14日周五 20:12写道：
>
> PR 115416
>
> When we build a cross toolchain, while without --with-sysroot,
> target headers are expected in
> ${test_exec_prefix}/${target_noncanonical}/sys-include
> while it is true only with --with-headers option is used. In other
> cases, the path should be
> ${test_exec_prefix}/${target_noncanonical}/include
> such as Debian's cross toolchain.
>
> Debian's cross toolchain has directory structures like:
> /usr/<triple>/lib
> /include
> /bin/<binutils-exe>
>
> For this case, we cannot use "--prefix=/usr --with-sysroot=/", as
> gcc/configure will use headers of build, aka in /usr/include to detect
> features. And fixinclude also uses the headers of build.
>
> Let's use the `include` if `sys-include` doesn't exist.
>
> For Makefile.in, the compare @includedir@ and $(prefix)/include is not
> correct, as the --includedir option is used to set where the headers
> should be installed.
>
> gcc:
> PR 115415.
> configure.ac: Set target_header_dir and CROSS_SYSTEM_HEADER_DIR
> to ${test_exec_prefix}/${target_noncanonical}/include when cross
> and without --with-sysroot and without --with-headers.
> configure: Regenerate.
> Makefile.in: Set CROSS_SYSTEM_HEADER_DIR as configure, and don't
> compare @includedir@ and $(prefix)/include.
> ---
> gcc/Makefile.in | 6 +-----
> gcc/configure | 8 ++++++--
> gcc/configure.ac | 4 ++++
> 3 files changed, 11 insertions(+), 7 deletions(-)
>
Gently ping.
