new *z*printf-gnu modules

[Bruno Haible]

This set of patches adds -gnu variants for the *z*printf modules
that we have so far, along with small unit tests.


2024-06-25  Bruno Haible  <bruno@clisp.org>

        obstack-zprintf-gnu: Add tests.
        * tests/test-obstack-zprintf-gnu.c: New file, based on
        tests/test-vazsprintf-gnu.c.
        * modules/obstack-zprintf-gnu-tests: New file.

        obstack-zprintf-gnu: New module.
        * modules/obstack-zprintf-gnu: New file.

2024-06-25  Bruno Haible  <bruno@clisp.org>

        vazsprintf-gnu: Add tests.
        * tests/test-vazsprintf-gnu.c: New file, based on
        tests/test-zsnprintf-gnu.h.
        * modules/vazsprintf-gnu-tests: New file.

        vazsprintf-gnu: New module.
        * modules/vazsprintf-gnu: New file.

2024-06-25  Bruno Haible  <bruno@clisp.org>

        zsprintf-gnu: Add tests.
        * tests/test-zsprintf-gnu.c: New file.
        * modules/zsprintf-gnu-tests: New file.

        zsprintf-gnu: New module.
        * modules/zsprintf-gnu: New file.

2024-06-25  Bruno Haible  <bruno@clisp.org>

        vzsprintf-gnu: Add tests.
        * tests/test-vzsprintf-gnu.c: New file.
        * tests/test-zsprintf-gnu.h: New file, based on
        tests/test-zsnprintf-gnu.h.
        * modules/vzsprintf-gnu-tests: New file.

        vzsprintf-gnu: New module.
        * modules/vzsprintf-gnu: New file.

2024-06-25  Bruno Haible  <bruno@clisp.org>

        zsnprintf-gnu: Add tests.
        * tests/test-zsnprintf-gnu.c: New file.
        * modules/zsnprintf-gnu-tests: New file.

        zsnprintf-gnu: New module.
        * modules/zsnprintf-gnu: New file.

2024-06-25  Bruno Haible  <bruno@clisp.org>

        vzsnprintf-gnu: Add tests.
        * tests/test-vzsnprintf-gnu.c: New file.
        * tests/test-zsnprintf-gnu.h: New file, based on
        tests/test-snprintf-gnu.h.
        * modules/vzsnprintf-gnu-tests: New file.

        vzsnprintf-gnu: New module.
        * modules/vzsnprintf-gnu: New file.

0001-vzsnprintf-gnu-New-module.patch
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0002-vzsnprintf-gnu-Add-tests.patch
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0003-zsnprintf-gnu-New-module.patch
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0004-zsnprintf-gnu-Add-tests.patch
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0005-vzsprintf-gnu-New-module.patch
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0006-vzsprintf-gnu-Add-tests.patch
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0007-zsprintf-gnu-New-module.patch
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0008-zsprintf-gnu-Add-tests.patch
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0009-vazsprintf-gnu-New-module.patch
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0010-vazsprintf-gnu-Add-tests.patch
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0011-obstack-zprintf-gnu-New-module.patch
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0012-obstack-zprintf-gnu-Add-tests.patch
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