https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96383
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |4.8.5, 4.9.4
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
Known to fail| |11.0, 7.5.0
Target Milestone|--- |8.5
Last reconfirmed| |2020-07-30
CC| |rguenth at gcc dot gnu.org
Summary|Full ABI information |[8/9/10/11 Regression] Full
|missing missing from GCC |ABI information missing
|compiled C |missing from GCC compiled C
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. With -O0 -g fflush isn't even mentioned.
-fno-eliminate-unused-debug-{symbols,types} does not help. Small testcase:
#include <stdio.h>
int main()
{
fflush (stdout);
}
GCC 4.8 and 4.9, but only with -O -g, not -O0 -g, have
<1><39a>: Abbrev Number: 16 (DW_TAG_subprogram)
<39b> DW_AT_external : 1
<39b> DW_AT_name : (indirect string, offset: 0x1e8): fflush
<39f> DW_AT_decl_file : 6
<3a0> DW_AT_decl_line : 204
<3a1> DW_AT_prototyped : 1
<3a1> DW_AT_type : <0x129>
<3a5> DW_AT_declaration : 1
<3a5> DW_AT_sibling : <0x3af>
<2><3a9>: Abbrev Number: 17 (DW_TAG_formal_parameter)
<3aa> DW_AT_type : <0x3af>
<2><3ae>: Abbrev Number: 0
<1><3af>: Abbrev Number: 6 (DW_TAG_pointer_type)
<3b0> DW_AT_byte_size : 8
<3b1> DW_AT_type : <0x2e0>
so this is a regression introduced with GCC 5. But of course we should fix
-O0 -g as well where it doesn't seem to be a regression.
