Firebird.xs:1277:13: error: passing argument 1 of ‘isc_event_block’ from incompatible pointer type

[robert-scheck]

DBD::Firebird fails to build in Fedora 40 like this:

gcc -c  -I"/usr/include" -I"/usr/lib64/perl5/vendor_perl/auto/DBI" -Wall -fno-strict-aliasing -D_REENTRANT -D_GNU_SOURCE -O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Wno-complain-wrong-lang -Werror=format-security -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -fwrapv -fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -m64   -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer  -O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Wno-complain-wrong-lang -Werror=format-security -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -m64   -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer   -DVERSION=\"1.34\" -DXS_VERSION=\"1.34\" -fPIC "-I/usr/lib64/perl5/CORE"   Firebird.c
[...]
Firebird.xs: In function ‘XS_DBD__Firebird__db_ib_init_event’:
Firebird.xs:1277:13: error: passing argument 1 of ‘isc_event_block’ from incompatible pointer type [-Wincompatible-pointer-types]
 1277 |             &(ev.event_buffer),
      |             ^~~~~~~~~~~~~~~~~~
      |             |
      |             char **
/usr/include/ibase.h:503:44: note: expected ‘ISC_UCHAR **’ {aka ‘unsigned char **’} but argument is of type ‘char **’
  503 | ISC_LONG ISC_EXPORT_VARARG isc_event_block(ISC_UCHAR**,
      |                                            ^~~~~~~~~~~
Firebird.xs:1278:13: error: passing argument 2 of ‘isc_event_block’ from incompatible pointer type [-Wincompatible-pointer-types]
 1278 |             &(ev.result_buffer),
      |             ^~~~~~~~~~~~~~~~~~~
      |             |
      |             char **
/usr/include/ibase.h:504:84: note: expected ‘ISC_UCHAR **’ {aka ‘unsigned char **’} but argument is of type ‘char **’
  504 |                                                                                    ISC_UCHAR**,
      |                                                                                    ^~~~~~~~~~~

This is most likely related to GCC 14.