Description:
g++ -march=i686 -mtune=generic -O2 -pipe -fstack-protector --param=ssp-buffer-size=4 -D_FORTIFY_SOURCE=2 -pthread -Wl,-O1,--sort-common,--as-needed,-z,relro,--hash-style=gnu -pthread -Wl,-rpath,/usr/lib -Wl,-rpath,no ../temp/boot/jrd/dsc.o ../temp/boot/jrd/gds.o ../temp/boot/jrd/isc.o ../temp/boot/gpre/cmd.o ../temp/boot/gpre/cme.o ../temp/boot/gpre/cmp.o ../temp/boot/gpre/c_cxx.o ../temp/boot/gpre/exp.o ../temp/boot/gpre/gpre.o ../temp/boot/gpre/hsh.o ../temp/boot/gpre/int_cxx.o ../temp/boot/gpre/jrdmet.o ../temp/boot/gpre/movg.o ../temp/boot/gpre/msc.o ../temp/boot/gpre/par.o ../temp/boot/gpre/pat.o ../temp/boot/gpre/sqe.o ../temp/boot/gpre/sql.o ../temp/boot/gpre/pretty.o ../temp/boot/gpre/gpre_meta_boot.o ../temp/boot/jrd/config_root.o ../temp/boot/jrd/path_utils.o ../temp/boot/jrd/mod_loader.o ../temp/boot/jrd/fbsyslog.o ../temp/boot/jrd/guid.o ../temp/boot/jrd/os_utils.o ../temp/boot/common/dllinst.o ../temp/boot/common/fb_exception.o ../temp/boot/common/thd.o ../temp/boot/common/classes/MetaName.o ../temp/boot/common/StatusHolder.o ../temp/boot/common/classes/init.o ../temp/boot/common/StatusArg.o ../temp/boot/common/utils.o ../temp/boot/common/config/config.o ../temp/boot/common/config/config_file.o ../temp/boot/common/config/dir_list.o ../temp/boot/common/classes/alloc.o ../temp/boot/common/classes/locks.o ../temp/boot/common/classes/semaphore.o ../temp/boot/common/classes/fb_string.o ../temp/boot/common/classes/timestamp.o ../temp/boot/common/classes/PublicHandle.o ../temp/boot/common/classes/TempFile.o ../temp/boot/common/classes/SafeArg.o ../temp/boot/common/classes/MsgPrint.o ../temp/boot/common/classes/BaseStream.o ../temp/boot/common/cvt.o -o ../gen/firebird/bin/gpre_boot -L../gen/firebird/lib -lm -ldl -lcurses
rm -f ../gen/firebird/bin/gpre_current
(cd ../gen/firebird/bin; ln -s gpre_boot gpre_current)
make[3]: Leaving directory `/build/src/Firebird-2.5.1.26351-0/gen'
make[2]: Leaving directory `/build/src/Firebird-2.5.1.26351-0/gen'
make[1]: *** [../gen/firebird/bin/gpre_static] Error 2
make[1]: Leaving directory `/build/src/Firebird-2.5.1.26351-0/gen'
make: *** [firebird] Error

The !makeflags option is needed.

Additional info:
* libfbclient 2.5.1.26351-1

Steps to reproduce:
Try to build it.