[Buildroot] [PATCH 1/2] package/tesseract-ocr: needs gcc >= 8

[Arnout Vandecappelle]

On 14/03/2025 22:03, Julien Olivain wrote:
> Since Buildroot commit [1] tesseract-ocr fails to build with gcc 7,
> with error:
>
>      src/api/baseapi.cpp:67:10: fatal error: filesystem: No such file or directory
>       #include <filesystem> // for std::filesystem
>                ^~~~~~~~~~~~
>
> In Buildroot, tesseract-ocr has a C++17 requirement captured as
> gcc >= 7. Gcc 7 has only a partial and experimental C++17 support,
> which was sufficient, prior [1].
>
> The tesseract-ocr upstream commit [2] introduced a usage of
> std::filesystem. This commit is included in version 5.5.0,
> bumped in [1].
>
> The C++17 with std::filesystem support was introduced in gcc 8.1.
> See [3].
>
> This commit fixes the issue by raising the gcc version requirement to
> 8.x.
>
> [1] https://gitlab.com/buildroot.org/buildroot/-/commit/f32da8b9844ae5f1b9dc6b7a89d7d9bd9d194f55
> [2] https://github.com/tesseract-ocr/tesseract/commit/4e42f9de541f21acb010886925afe42094a15dfe
> [3] https://gcc.gnu.org/gcc-8/changes.html#libstdcxx
>
> Signed-off-by: Julien Olivain <ju.o at free.fr>

  Applied to 2025.02.x, thanks.

  Regards,
  Arnout

> ---
>   package/tesseract-ocr/Config.in | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/package/tesseract-ocr/Config.in b/package/tesseract-ocr/Config.in
> index 4d9b78733e..79a27780b2 100644
> --- a/package/tesseract-ocr/Config.in
> +++ b/package/tesseract-ocr/Config.in
> @@ -1,13 +1,13 @@
> -comment "tesseract-ocr needs a toolchain w/ threads, C++, gcc >= 7, dynamic library, wchar"
> +comment "tesseract-ocr needs a toolchain w/ threads, C++, gcc >= 8, dynamic library, wchar"
>   	depends on BR2_USE_MMU
>   	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS || \
> -		!BR2_TOOLCHAIN_GCC_AT_LEAST_7 || BR2_STATIC_LIBS || !BR2_USE_WCHAR
> +		!BR2_TOOLCHAIN_GCC_AT_LEAST_8 || BR2_STATIC_LIBS || !BR2_USE_WCHAR
>   
>   menuconfig BR2_PACKAGE_TESSERACT_OCR
>   	bool "tesseract-ocr"
>   	depends on BR2_INSTALL_LIBSTDCPP
>   	depends on BR2_TOOLCHAIN_HAS_THREADS
> -	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_7 # C++17
> +	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_8 # C++17 filesystem
>   	depends on BR2_USE_MMU # fork()
>   	depends on !BR2_STATIC_LIBS
>   	depends on BR2_USE_WCHAR