[ispc] Add new port.

[Neumann-A]

• Changes comply with the maintainer guide
• The name of the port matches an existing name for this component on https://repology.org/ if possible, and/or is strongly associated with that component on search engines.
  https://repology.org/project/ispc/versions
• Optional dependencies are resolved in exactly one way. For example, if the component is built with CMake, all find_package calls are REQUIRED, are satisfied by vcpkg.json's declared dependencies, or disabled with CMAKE_DISABLE_FIND_PACKAGE_Xxx shouldn't have any
• The versioning scheme in vcpkg.json matches what upstream says.
• The license declaration in vcpkg.json matches what upstream says.
• The installed as the "copyright" file matches what upstream says.
• The source code of the component installed comes from an authoritative source.
• The generated "usage text" is accurate. See docs/examples/adding-an-explicit-usage.md for context.
• The version database is fixed by rerunning ./vcpkg x-add-version --all and committing the result.
• Only one version is in the new port's versions file.
• Only one version is added to each modified port's versions file.

this builds the ispc compiler and the corresponding crt library if I see it correctly. I need it for other libs down the path.

[github-actions]

This is a new experimental fast check for PR issues. Please let us know if this bot is helpful!

PRs must add only one version and must not modify any published versions

When making any changes to a library, the version or port-version in vcpkg.json or CONTROL must be modified.

error: checked-in files for ispc have changed but the version was not updated
version: 1.18.1
old SHA: 41564d1866693510de62fc30e03e02174ba9c7e9
new SHA: 9b908e7de97026a6bd4bebc5f4a164b4a4d7e1fb
Did you remember to update the version or port version?
Use --overwrite-version to bypass this check
***No files were updated***

[github-actions]

This is a new experimental fast check for PR issues. Please let us know if this bot is helpful!

PRs must add only one version and must not modify any published versions

When making any changes to a library, the version or port-version in vcpkg.json or CONTROL must be modified.

error: checked-in files for llvm have changed but the version was not updated
version: 14.0.6
old SHA: a5e218fee4a3c429f4e2c9586de5083c1b13c7da
new SHA: d92ec54997b140950fc7fafc8ccea9242edb6fd8
Did you remember to update the version or port version?
Use --overwrite-version to bypass this check
***No files were updated***
error: checked-in files for ispc have changed but the version was not updated
version: 1.18.1
old SHA: 41564d1866693510de62fc30e03e02174ba9c7e9
new SHA: 9b908e7de97026a6bd4bebc5f4a164b4a4d7e1fb
Did you remember to update the version or port version?
Use --overwrite-version to bypass this check
***No files were updated***

You have modified or added at least one portfile where deprecated functions are used.

If you feel able to do so, please consider migrating them to the new functions:
vcpkg_install_cmake -> vcpkg_cmake_install (from port vcpkg-cmake)
vcpkg_build_cmake -> vcpkg_cmake_build (from port vcpkg-cmake)
vcpkg_configure_cmake -> vcpkg_cmake_configure (Please remove the option PREFER_NINJA) (from port vcpkg-cmake)
vcpkg_fixup_cmake_targets -> vcpkg_cmake_config_fixup (from port vcpkg-cmake-config)
vcpkg_extract_source_archive_ex -> vcpkg_extract_source_archive
vcpkg_build_msbuild -> vcpkg_install_msbuild
vcpkg_copy_tool_dependencies -> vcpkg_copy_tools
vcpkg_apply_patches should be replaced by the PATCHES arguments to the "extract" helpers (e.g. vcpkg_from_github())

In the ports that use the new function, you have to add the corresponding dependencies:

{
  "name": "vcpkg-cmake",
  "host": true
},
{
  "name": "vcpkg-cmake-config",
  "host": true
}

The following files are affected:

• ports/llvm/portfile.cmake

[github-actions]

This is a new experimental fast check for PR issues. Please let us know if this bot is helpful!

PRs must add only one version and must not modify any published versions

When making any changes to a library, the version or port-version in vcpkg.json or CONTROL must be modified.

error: checked-in files for llvm have changed but the version was not updated
version: 14.0.6
old SHA: a5e218fee4a3c429f4e2c9586de5083c1b13c7da
new SHA: 8d785bdeffdeb0b990525a89d0a9f04cc239418e
Did you remember to update the version or port version?
Use --overwrite-version to bypass this check
***No files were updated***
error: checked-in files for ispc have changed but the version was not updated
version: 1.18.1
old SHA: 41564d1866693510de62fc30e03e02174ba9c7e9
new SHA: 9b908e7de97026a6bd4bebc5f4a164b4a4d7e1fb
Did you remember to update the version or port version?
Use --overwrite-version to bypass this check
***No files were updated***

You have modified or added at least one portfile where deprecated functions are used.

If you feel able to do so, please consider migrating them to the new functions:
vcpkg_install_cmake -> vcpkg_cmake_install (from port vcpkg-cmake)
vcpkg_build_cmake -> vcpkg_cmake_build (from port vcpkg-cmake)
vcpkg_configure_cmake -> vcpkg_cmake_configure (Please remove the option PREFER_NINJA) (from port vcpkg-cmake)
vcpkg_fixup_cmake_targets -> vcpkg_cmake_config_fixup (from port vcpkg-cmake-config)
vcpkg_extract_source_archive_ex -> vcpkg_extract_source_archive
vcpkg_build_msbuild -> vcpkg_install_msbuild
vcpkg_copy_tool_dependencies -> vcpkg_copy_tools
vcpkg_apply_patches should be replaced by the PATCHES arguments to the "extract" helpers (e.g. vcpkg_from_github())

In the ports that use the new function, you have to add the corresponding dependencies:

{
  "name": "vcpkg-cmake",
  "host": true
},
{
  "name": "vcpkg-cmake-config",
  "host": true
}

The following files are affected:

• ports/llvm/portfile.cmake

[Neumann-A]

If osx is still red due to llvm someone needs to debug that issue separatly.

[github-actions]

This is a new experimental fast check for PR issues. Please let us know if this bot is helpful!

PRs must add only one version and must not modify any published versions

When making any changes to a library, the version or port-version in vcpkg.json or CONTROL must be modified.

error: checked-in files for llvm have changed but the version was not updated
version: 14.0.6
old SHA: a5e218fee4a3c429f4e2c9586de5083c1b13c7da
new SHA: 8d785bdeffdeb0b990525a89d0a9f04cc239418e
Did you remember to update the version or port version?
Use --overwrite-version to bypass this check
***No files were updated***
error: checked-in files for ispc have changed but the version was not updated
version: 1.18.1
old SHA: 41564d1866693510de62fc30e03e02174ba9c7e9
new SHA: b9b0630a3249af18b39a60a948adbe59ed87f77b
Did you remember to update the version or port version?
Use --overwrite-version to bypass this check
***No files were updated***

You have modified or added at least one portfile where deprecated functions are used.

If you feel able to do so, please consider migrating them to the new functions:
vcpkg_install_cmake -> vcpkg_cmake_install (from port vcpkg-cmake)
vcpkg_build_cmake -> vcpkg_cmake_build (from port vcpkg-cmake)
vcpkg_configure_cmake -> vcpkg_cmake_configure (Please remove the option PREFER_NINJA) (from port vcpkg-cmake)
vcpkg_fixup_cmake_targets -> vcpkg_cmake_config_fixup (from port vcpkg-cmake-config)
vcpkg_extract_source_archive_ex -> vcpkg_extract_source_archive
vcpkg_build_msbuild -> vcpkg_install_msbuild
vcpkg_copy_tool_dependencies -> vcpkg_copy_tools
vcpkg_apply_patches should be replaced by the PATCHES arguments to the "extract" helpers (e.g. vcpkg_from_github())

In the ports that use the new function, you have to add the corresponding dependencies:

{
  "name": "vcpkg-cmake",
  "host": true
},
{
  "name": "vcpkg-cmake-config",
  "host": true
}

The following files are affected:

• ports/llvm/portfile.cmake

[github-actions]

This is a new experimental fast check for PR issues. Please let us know if this bot is helpful!

PRs must add only one version and must not modify any published versions

When making any changes to a library, the version or port-version in vcpkg.json or CONTROL must be modified.

error: checked-in files for llvm have changed but the version was not updated
version: 14.0.6
old SHA: a5e218fee4a3c429f4e2c9586de5083c1b13c7da
new SHA: 74314634609353987159aa71b4cbad6e97690043
Did you remember to update the version or port version?
Use --overwrite-version to bypass this check
***No files were updated***
error: checked-in files for ispc have changed but the version was not updated
version: 1.18.1
old SHA: 41564d1866693510de62fc30e03e02174ba9c7e9
new SHA: b9b0630a3249af18b39a60a948adbe59ed87f77b
Did you remember to update the version or port version?
Use --overwrite-version to bypass this check
***No files were updated***

You have modified or added at least one portfile where deprecated functions are used.

If you feel able to do so, please consider migrating them to the new functions:
vcpkg_install_cmake -> vcpkg_cmake_install (from port vcpkg-cmake)
vcpkg_build_cmake -> vcpkg_cmake_build (from port vcpkg-cmake)
vcpkg_configure_cmake -> vcpkg_cmake_configure (Please remove the option PREFER_NINJA) (from port vcpkg-cmake)
vcpkg_fixup_cmake_targets -> vcpkg_cmake_config_fixup (from port vcpkg-cmake-config)
vcpkg_extract_source_archive_ex -> vcpkg_extract_source_archive
vcpkg_build_msbuild -> vcpkg_install_msbuild
vcpkg_copy_tool_dependencies -> vcpkg_copy_tools
vcpkg_apply_patches should be replaced by the PATCHES arguments to the "extract" helpers (e.g. vcpkg_from_github())

In the ports that use the new function, you have to add the corresponding dependencies:

{
  "name": "vcpkg-cmake",
  "host": true
},
{
  "name": "vcpkg-cmake-config",
  "host": true
}

The following files are affected:

• ports/llvm/portfile.cmake

[Neumann-A]

@BillyONeal seems like somebody messed up LLVM features:

    "disable-assertions": {
      "description": "Build LLVM without assertions."
    },
    "enable-assertions": {
      "description": "Build LLVM with assertions."
    },

[Neumann-A]

probably easier to get #29285 done then this one on !windows

Bad bot

[BillyONeal]

I think this makes sense as a tool port, but I think we need an understanding (both we the vcpkg team and we our users via docs) how the proposed tooling is to interact with the knobs we give users to control compilers in the triplet. (Just as we don't allow ports in general control over the compiler that they use, we want to be cautious that whatever tooling shows up here consistently obeys what the user says in their triplet or similar)