Florian, you committed several changes to fix history, but they somehow resulted in the fact that oldheap.inc is not present in current trunk...
This means that it is impossible to test old heap, could you please reinstall oldheap or explain what happens. Pierre muller@cfarm422:~/pas/trunk/fpcsrc$ make rtl OPT="-n -vx -dLEGACYHEAP" make -C rtl all make[1]: Entering directory '/home/muller/pas/gitlab-fpc-source/rtl' make -C linux all make[2]: Entering directory '/home/muller/pas/gitlab-fpc-source/rtl/linux' /usr/bin/mkdir -p /home/muller/pas/gitlab-fpc-source/rtl/units/x86_64-linux make /home/muller/pas/gitlab-fpc-source/rtl/units/x86_64-linux make[3]: Entering directory '/home/muller/pas/gitlab-fpc-source/rtl/linux' make[3]: '/home/muller/pas/gitlab-fpc-source/rtl/units/x86_64-linux' is up to date. make[3]: Leaving directory '/home/muller/pas/gitlab-fpc-source/rtl/linux' as --64 -o /home/muller/pas/gitlab-fpc-source/rtl/units/x86_64-linux/abitag.o x86_64/abitag.as /home/muller/pas/fpc-3.3.1/bin/ppcx64 -Ur -Ur -Xs -O2 -n -Fi../inc -Fi../x86_64 -Fi../unix -Fix86_64 -FE. -FU/home/muller/pas/gitlab-fpc-source/rtl/units/x86_64-linux -Cg -Fl/usr/lib/gcc/x86_64-linux-gnu/12 -n -vx -dLEGACYHEAP -dx86_64 -dRELEASE -Us -Sg system.pp system.inc(1780,2) Fatal: Cannot open include file "oldheap.inc" Fatal: Compilation aborted muller@cfarm422:~/pas/trunk/fpcsrc/rtl/inc$ grep oldheap -iwnrC4 . ./system.inc-1776- ./system.inc-1777-{$i sysheap.inc} ./system.inc-1778- ./system.inc-1779-{$IFDEF LEGACYHEAP} ./system.inc:1780:{$i oldheap.inc} ./system.inc-1781-{$ELSE} ./system.inc-1782-{$i heap.inc} ./system.inc-1783-{$ENDIF LEGACYHEAP} ./system.inc-1784- muller@cfarm422:~/pas/trunk/fpcsrc$ git log -n 6 -- rtl/inc/oldheap.inc commit dfbd4eac2a81a88c0e11367d0159781c2e254821 Author: florian <flor...@freepascal.org> Date: Fri Apr 18 14:55:13 2025 +0200 + fix line history part 2 commit 06aff099c163330f64f6a871ebe4ede1fabe7286 Author: Michaël Van Canneyt <mich...@freepascal.org> Date: Fri Apr 18 14:18:41 2025 +0200 * Move heap to oldheap, prepare for MR !694 _______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-devel