* crypto: use _Generic only if !defined(__cplusplus)
* fixes build with gcc-14 which has __builtin_addc and __builtin_subc
with gcc-13 it was already using the #else branch because of missing builtins
* fixes
https://github.com/grpc/grpc/issues/35945http://errors.yoctoproject.org/Errors/Details/766916/
* _Generic was introduced in boringssl with:
https://boringssl.googlesource.com/boringssl/+/70ca6bc24be103dabd68e448cd3af29b929b771d%5E%21/#F4
* but e.g. third_party/boringssl-with-bazel/src/ssl/d1_both.cc includes
this internal.h and from the .cc extension gcc will process it as C++
where _Generic isn't available, causing:
In file included from third_party/boringssl-with-bazel/src/ssl/d1_both.cc:125:
third_party/boringssl-with-bazel/src/ssl/../crypto/internal.h: In function 'uint32_t CRYPTO_addc_u32(uint32_t, uint32_t, uint32_t, uint32_t*)':
third_party/boringssl-with-bazel/src/ssl/../crypto/internal.h:1159:7: error: expected primary-expression before 'unsigned'
1159 | unsigned: __builtin_addc, \
| ^~~~~~~~
third_party/boringssl-with-bazel/src/ssl/../crypto/internal.h:1166:10: note: in expansion of macro 'CRYPTO_GENERIC_ADDC'
1166 | return CRYPTO_GENERIC_ADDC(x, y, carry, out_carry);
| ^~~~~~~~~~~~~~~~~~~
third_party/boringssl-with-bazel/src/ssl/../crypto/internal.h:1160:7: error: expected primary-expression before 'unsigned'
1160 | unsigned long: __builtin_addcl, \
| ^~~~~~~~
third_party/boringssl-with-bazel/src/ssl/../crypto/internal.h:1166:10: note: in expansion of macro 'CRYPTO_GENERIC_ADDC'
1166 | return CRYPTO_GENERIC_ADDC(x, y, carry, out_carry);
| ^~~~~~~~~~~~~~~~~~~
third_party/boringssl-with-bazel/src/ssl/../crypto/internal.h:1161:7: error: expected primary-expression before 'unsigned'
1161 | unsigned long long: __builtin_addcll))((x), (y), (carry), (out_carry))
| ^~~~~~~~
third_party/boringssl-with-bazel/src/ssl/../crypto/internal.h:1166:10: note: in expansion of macro 'CRYPTO_GENERIC_ADDC'
1166 | return CRYPTO_GENERIC_ADDC(x, y, carry, out_carry);
| ^~~~~~~~~~~~~~~~~~~
third_party/boringssl-with-bazel/src/ssl/../crypto/internal.h:1158:4: error: '_Generic' was not declared in this scope
1158 | (_Generic((x), \
| ^~~~~~~~
third_party/boringssl-with-bazel/src/ssl/../crypto/internal.h:1166:10: note: in expansion of macro 'CRYPTO_GENERIC_ADDC'
1166 | return CRYPTO_GENERIC_ADDC(x, y, carry, out_carry);
| ^~~~~~~~~~~~~~~~~~~
Signed-off-by: Martin Jansa <martin.jansa@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
