Issue #20601 has been updated by vo.x (Vit Ondruch). This might be the medicine: ~~~patch $ git diff diff --git a/template/Makefile.in b/template/Makefile.in index 2d232d7925..31e5ae5edb 100644 --- a/template/Makefile.in +++ b/template/Makefile.in @@ -449,7 +449,7 @@ $(srcdir)/enc/jis/props.h: enc/jis/props.kwd .$(ASMEXT).$(OBJEXT): @$(ECHO) assembling $< - $(Q) $(CC) $(ASFLAGS) -DSYMBOL_PREFIX=$(SYMBOL_PREFIX) -o $@ -c $< + $(Q) $(CC) $(ASFLAGS) -DSYMBOL_PREFIX=$(SYMBOL_PREFIX) $(CFLAGS) $(XCFLAGS) $(CPPFLAGS) $(COUTFLAG)$@ -o $@ -c $< .c.$(ASMEXT): @$(ECHO) translating $< ~~~ But I am not entirely convinced, if leaving the `$(ASFLAGS)` around is of any use. ---------------------------------------- Bug #20601: Configuration flags are not properly propagated to assembler https://bugs.ruby-lang.org/issues/20601#change-108931 * Author: vo.x (Vit Ondruch) * Status: Open * ruby -v: ruby 3.3.2 (2024-05-30 revision e5a195edf6) [x86_64-linux] * Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN ---------------------------------------- Looking into #18061, one of the issues is that the `.S` files are not processed with the correct flags. For example to have the CET enabled, the `-fcf-protection` should be used to preprocess the `coroutine/amd64/Context.S`. First I thought there is something wrong on Fedora side, therefore I have proposed to export the `ASFLAGS` [1]. However, as it turns out, `$(ASFLAGS)` are used by GNU make default rule and passed to `$(AS)`. And indeed, Ruby had historically override of this rule, but it does not do this anymore since: https://github.com/ruby/ruby/commit/091422388e943de1e67ace6faac3d71ed08c14d2 https://github.com/ruby/ruby/commit/42575570a908aac979a80b89266804c4c688dd7c As can be seen, while previously `$(AS)` was used to process the `.s` file, it was replaced by the compiler. This however means that the `.S` files are not preprocessed with the `$(CFLAGS)`, which contains `-fcf-protection`. [1]: https://bugzilla.redhat.com/show_bug.cgi?id=2293107 -- https://bugs.ruby-lang.org/