add more C++ tests

[Bruno Haible]

I'm seeing a compilation error in C++ mode on FreeBSD 13.1, and am wondering
whether it comes from <spawn.h> or from <sched.h>. In order to determine this,
a C++ test for <sched.h> is needed. While at it, I'm also adding C++ tests
for other .h files, such as <stdalign.h> and <sys/file.h>.


2022-09-03  Bruno Haible  <bruno@clisp.org>

        stdnoreturn: Document relation to C++.
        * doc/posix-headers/stdnoreturn.texi: Document FreeBSD problem.

2022-09-03  Bruno Haible  <bruno@clisp.org>

        sysexits: Add C++ tests.
        * tests/test-sysexits-c++.cc: New file.
        * modules/sysexits-c++-tests: New file.
        * modules/sysexits-tests (Depends-on): Add sysexits-c++-tests.

2022-09-03  Bruno Haible  <bruno@clisp.org>

        sys_utsname: Add C++ tests.
        * tests/test-sys_utsname-c++.cc: New file.
        * modules/sys_utsname-c++-tests: New file.
        * modules/sys_utsname-tests (Depends-on): Add sys_utsname-c++-tests.

2022-09-03  Bruno Haible  <bruno@clisp.org>

        sys_uio: Add C++ tests.
        * tests/test-sys_uio-c++.cc: New file.
        * modules/sys_uio-c++-tests: New file.
        * modules/sys_uio-tests (Depends-on): Add sys_uio-c++-tests.

2022-09-03  Bruno Haible  <bruno@clisp.org>

        sys_times: Add C++ tests.
        * tests/test-sys_times-c++.cc: New file.
        * modules/sys_times-c++-tests: New file.
        * modules/sys_times-tests (Depends-on): Add sys_times-c++-tests.

2022-09-03  Bruno Haible  <bruno@clisp.org>

        sys_file: Add C++ tests.
        * tests/test-sys_file-c++.cc: New file.
        * modules/sys_file-c++-tests: New file.
        * modules/sys_file-tests (Depends-on): Add sys_file-c++-tests.

        sys_file: Document this module.
        * doc/glibc-headers/sys_file.texi: New file.
        * doc/gnulib.texi (Glibc Header File Substitutes): Include it.

2022-09-03  Bruno Haible  <bruno@clisp.org>

        stdckdint: Add C++ tests.
        * tests/test-stdckdint-c++.cc: New file.
        * modules/stdckdint-c++-tests: New file.
        * modules/stdckdint-tests (Depends-on): Add stdckdint-c++-tests.

2022-09-03  Bruno Haible  <bruno@clisp.org>

        stdalign: Add C++ tests.
        * tests/test-stdalign-c++.cc: New file.
        * modules/stdalign-c++-tests: New file.
        * modules/stdalign-tests (Depends-on): Add stdalign-c++-tests.

2022-09-03  Bruno Haible  <bruno@clisp.org>

        sched: Add C++ tests.
        * tests/test-sched-c++.cc: New file.
        * modules/sched-c++-tests: New file.
        * modules/sched-tests (Depends-on): Add sched-c++-tests.

2022-09-03  Bruno Haible  <bruno@clisp.org>

        netinet_in: Add C++ tests.
        * tests/test-netinet_in-c++.cc: New file.
        * modules/netinet_in-c++-tests: New file.
        * modules/netinet_in-tests (Depends-on): Add netinet_in-c++-tests.

2022-09-03  Bruno Haible  <bruno@clisp.org>

        net_if: Add C++ tests.
        * tests/test-net_if-c++.cc: New file.
        * modules/net_if-c++-tests: New file.
        * modules/net_if-tests (Depends-on): Add net_if-c++-tests.
        * doc/posix-headers/net_if.texi: Fix documentation.

0001-net_if-Add-C-tests.patch
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0002-netinet_in-Add-C-tests.patch
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0003-sched-Add-C-tests.patch
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0004-stdalign-Add-C-tests.patch
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0005-stdckdint-Add-C-tests.patch
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0006-sys_file-Document-this-module.patch
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0007-sys_file-Add-C-tests.patch
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0008-sys_times-Add-C-tests.patch
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0009-sys_uio-Add-C-tests.patch
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0010-sys_utsname-Add-C-tests.patch
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0011-sysexits-Add-C-tests.patch
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0012-stdnoreturn-Document-relation-to-C.patch
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