8000 NFIQ2 not able to compile using NDK 28.1.13356709 · Issue #405 · usnistgov/NFIQ2 · GitHub
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NFIQ2 not able to compile using NDK 28.1.13356709 #405

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bhuvan1691 opened this issue Jun 6, 2025 · 1 comment
Open

NFIQ2 not able to compile using NDK 28.1.13356709 #405

bhuvan1691 opened this issue Jun 6, 2025 · 1 comment

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@bhuvan1691
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bhuvan1691 commented Jun 6, 2025 •
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While compiling NFIQ2 with NDK for andorid I encounter with belo problem

/home/Downloads/android-ndk-r28b/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/include/c++/v1/string:746:43: error: implicit instantiation of undefined template 'std::char_traits'
746 | static_assert((is_same<_CharT, typename traits_type::char_type>::value),
| ^
/home/Downloads/NFIQ2/NFIQ2/NFIQ2Algorithm/include/nfiq2_data.hpp:24:21: note: in instantiation of template class 'std::basic_string' requested here
24 | class Data : public std::basic_string<uint8_t> {
| ^
/home/Downloads/android-ndk-r28b/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/include/c++/v1/__fwd/string.h:23:29: note: template is declared here
23 | struct _LIBCPP_TEMPLATE_VIS char_traits;

In file included from /home/Downloads/android-ndk-r28b/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/include/c++/v1/string:627:
/home/Downloads/android-ndk-r28b/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/include/c++/v1/string_view:299:43: error: implicit instantiation of undefined template 'std::char_traits'
299 | static_assert((is_same<_CharT, typename traits_type::char_type>::value),
| ^
/home/Downloads/android-ndk-r28b/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/include/c++/v1/__type_traits/is_convertible.h:22:102: note: in instantiation of template class 'std::basic_string_view' requested here
22 | struct _LIBCPP_TEMPLATE_VIS is_convertible : public integral_constant<bool, __is_convertible(_T1, _T2)> {};
| ^
/home/Downloads/android-ndk-r28b/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/include/c++/v1/string:704:29: note: in instantiation of template class 'std::is_convertible<const std::basic_string &, std::basic_string_view>' requested here
704 | : public _BoolConstant< is_convertible<const _Tp&, basic_string_view<_CharT, _Traits> >::value &&
| ^
/home/Downloads/android-ndk-r28b/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/include/c++/v1/string:1136:27: note: in instantiation of template class 'std::__can_be_converted_to_string_view<unsigned char, std::char_traits, std::basic_string>' requested here
1136 | __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value &&
| ^
/home/Downloads/android-ndk-r28b/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/include/c++/v1/string:1139:47: note: while substituting prior template arguments into non-type template parameter [with _Tp = std::basic_string]
1139 | _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator=(const _Tp& __t) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~

This traits_type is not defined.
Can anyone provide the solution for it.
I have tried gnu++11, gnu++17, c++11, & c++17 but it has nothing to do with it.
@gfiumara
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gfiumara commented Jun 6, 2025

This should be resolved with #404. We will merge it after some more testing, but you can pull the branch from this PR for now.

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