https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94296
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> --- This is yet another test that should be dg-skip-if -fcompare-debug and -fno-asynchronous-unwind-tables. The code is different depending on the __GCC_HAVE_DWARF2_CFI_ASM macro, which is dependent on whether -g -fno-asynchronous-unwind-tables is present or not. $ ./cc1 -quiet -g -fno-asynchronous-unwind-tables -dD -E /dev/null | grep CFI #define __GCC_HAVE_DWARF2_CFI_ASM 1 $ ./cc1 -quiet -g0 -fno-asynchronous-unwind-tables -dD -E /dev/null | grep CFI $ ./cc1 -quiet -g -gtoggle -fno-asynchronous-unwind-tables -dD -E /dev/null | grep CFI $ ./cc1 -quiet -g -fasynchronous-unwind-tables -dD -E /dev/null | grep CFI #define __GCC_HAVE_DWARF2_CFI_ASM 1 $ ./cc1 -quiet -g0 -fasynchronous-unwind-tables -dD -E /dev/null | grep CFI #define __GCC_HAVE_DWARF2_CFI_ASM 1 $ ./cc1 -quiet -g -gtoggle -fasynchronous-unwind-tables -dD -E /dev/null | grep CFI #define __GCC_HAVE_DWARF2_CFI_ASM 1 This macro is predefined when code should use .cfi_* directives in inline asm, which is not when the assembler doesn't support them obviously, but otherwise either when -fasynchronous-unwind-tables is on, or when -g is on. If neither is on, neither .eh_frame nor .debug_frame will be emitted and thus the .cfi* directives are undesirable.
