Well, after install qt5-devel and lot of qt packages, I can´t compile IDE with qt5:
Messages, Warnings: 3
Warning: other unit files search path (aka unit path) of "zcomponentdesign 8.0" contains "/home/gsantana/zeoslib/src/component", which belongs to package "zcomponent"
Warning: other unit files search path (aka unit path) of "dcpcrypt_laz 2.0.4.2" contains "/home/gsantana/.lazarus/onlinepackagemanager/packages/DCPcrypt/Ciphers", which belongs to package "dcpcrypt"
Warning: other unit files search path (aka unit path) of "zcomponent 8.0" contains "/home/gsantana/zeoslib/src/component", which belongs to package "zcomponentdesign"
Build IDE: Exit code 2, Errors: 4, Warnings: 2
Warning: linker: /usr/bin/ld: /home/gsantana/lazarus/lcl/units/x86_64-linux/qt5/qtint.o: in function `CREATE':
qtobject.inc(44,0) Error: linker: undefined reference to `QGuiApplication_setFallbackSessionManagementEnabled'
Warning: linker: /usr/bin/ld: /home/gsantana/lazarus/lcl/units/x86_64-linux/qt5/qtobjects.o: in function `ENDX11SELECTIONLOCK':
qtobjects.pas(3873,0) Error: linker: undefined reference to `QTimer_singleShot3'
make[2]: *** [Makefile:4362: lazarus] Error 1
make[1]: *** [Makefile:4801: ide] Error 2
*** [Makefile(3116,0) Error: linker: ide] Error 2
lazarus.pp(171,1) Error: Error while linking