external/firebird: Adapt to C++26

...as seen failing with --with-latest-c++ and recent Clang 18 trunk,

In file included from workdir/UnpackedTarball/firebird/src/jrd/Collation.cpp:105:
> workdir/UnpackedTarball/firebird/src/jrd/../jrd/SimilarToMatcher.h:1462:11: error: invalid bitwise operation between different enumeration types ('const Op' and 'MatchState')
>  1462 |                 switch (ENCODE_OP_STATE(node->op, state))
>       |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> workdir/UnpackedTarball/firebird/src/jrd/../jrd/SimilarToMatcher.h:1458:42: note: expanded from macro 'ENCODE_OP_STATE'
>  1458 | #define ENCODE_OP_STATE(op, state) ((op) | (state))
>       |                                     ~~~~ ^ ~~~~~~~
> workdir/UnpackedTarball/firebird/src/jrd/../jrd/SimilarToMatcher.h:561:3: note: in instantiation of member function 'Firebird::SimilarToMatcher<unsigned char>::Evaluator::match' requested here
>   561 |                 match();
>       |                 ^
> workdir/UnpackedTarball/firebird/src/jrd/../jrd/SimilarToMatcher.h:462:20: note: in instantiation of member function 'Firebird::SimilarToMatcher<unsigned char>::Evaluator::getResult' requested here
>   462 |                 return evaluator.getResult();
>       |                                  ^
> workdir/UnpackedTarball/firebird/src/jrd/Collation.cpp:787:29: note: in instantiation of member function 'Firebird::SimilarToMatcher<unsigned char>::evaluate' requested here
>   787 |                 return pSimilarToMatcher::evaluate(pool, this, s, sl, p, pl, escape, escapeLen);
>       |                                           ^
> workdir/UnpackedTarball/firebird/src/jrd/Collation.cpp:736:2: note: in instantiation of member function '(anonymous namespace)::CollationImpl<(anonymous namespace)::StartsMatcher<unsigned char, Jrd::NullStrConverter>, (anonymous namespace)::ContainsMatcher<unsigned char, Jrd::UpcaseConverter<>>, (anonymous namespace)::LikeMatcher<unsigned char>, Firebird::SimilarToMatcher<unsigned char>, Firebird::SubstringSimilarMatcher<unsigned char>, (anonymous namespace)::MatchesMatcher<unsigned char>, (anonymous namespace)::SleuthMatcher<unsigned char>>::similarTo' requested here
>   736 |         CollationImpl(TTYPE_ID a_type, texttype* a_tt, CharSet* a_cs)
>       |         ^
> workdir/UnpackedTarball/firebird/src/jrd/Collation.cpp:843:28: note: in instantiation of member function '(anonymous namespace)::CollationImpl<(anonymous namespace)::StartsMatcher<unsigned char, Jrd::NullStrConverter>, (anonymous namespace)::ContainsMatcher<unsigned char, Jrd::UpcaseConverter<>>, (anonymous namespace)::LikeMatcher<unsigned char>, Firebird::SimilarToMatcher<unsigned char>, Firebird::SubstringSimilarMatcher<unsigned char>, (anonymous namespace)::MatchesMatcher<unsigned char>, (anonymous namespace)::SleuthMatcher<unsigned char>>::CollationImpl' requested here
>   843 |                 return FB_NEW_POOL(pool) DirectImpl(id, tt, cs);
>       |                                          ^
> workdir/UnpackedTarball/firebird/src/jrd/Collation.cpp:862:11: note: in instantiation of function template specialization '(anonymous namespace)::newCollation<unsigned char>' requested here
>   862 |                         return newCollation<UCHAR>(pool, id, tt, cs);
>       |                                ^

Change-Id: I0af4752b04020e978ea4b339ff21688302c63ef6
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/162230
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <stephan.bergmann@allotropia.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/external/firebird/UnpackedTarball_firebird.mk b/external/firebird/UnpackedTarball_firebird.mk
index b5e7c64f12f8..84b82de8b906 100644
--- a/external/firebird/UnpackedTarball_firebird.mk
+++ b/external/firebird/UnpackedTarball_firebird.mk
@@ -47,6 +47,7 @@ $(eval $(call gb_UnpackedTarball_add_patches,firebird,\
     external/firebird/Wincompatible-function-pointer-types.patch \
 	external/firebird/0001-Revert-Backported-fix-for-7122-Invalid-state-of-mapp.patch.1 \
 	external/firebird/mold.patch \
+    external/firebird/c++26.patch \
 ))
 
 ifeq ($(OS),WNT)