https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88421
Bug ID: 88421
Summary: compat C headers break building GCC with GCC
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: coypu at sdf dot org
Target Milestone: ---
I built GCC #1 (x86_64->sh3)
Now I'm trying to build GCC #2 (sh3->sh3) using GCC #1
during the build process,
libtool: compile: shle--netbsdelf-c++ --sysroot=/home/fly/sh3/destdir.evbsh3/
-I/current/gcc/libstdc++-v3/../libgcc
-I/tmp/build/shle--netbsdelf/libstdc++-v3/include/shle--netbsdelf
-I/tmp/build/shle--netbsdelf/libstdc++-v3/include
-I/current/gcc/libstdc++-v3/libsupc++ -std=gnu++98 -D_GLIBCXX_SHARED
-fno-implicit-templates -Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi=2
-fdiagnostics-show-location=once -ffunction-sections -fdata-sections
-frandom-seed=c++locale.lo -g -O2 -fimplicit-templates -c c++locale.cc -fPIC
-DPIC -D_GLIBCXX_SHARED -o c++locale.o
mv -f .deps/list_read.Tpo .deps/list_read.Plo
In file included from
/home/fly/sh3/destdir.evbsh3/usr/include/evbsh3/ieeefp.h:3,
from /home/fly/sh3/destdir.evbsh3/usr/include/ieeefp.h:12,
from c++locale.cc:40:
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h: In function 'fp_except
__FPE(int)':
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:62:13: error:
'FE_DIVBYZERO' was not declared in this scope
62 | if (__fe & FE_DIVBYZERO)
| ^~~~~~~~~~~~
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:64:13: error:
'FE_INEXACT' was not declared in this scope
64 | if (__fe & FE_INEXACT)
| ^~~~~~~~~~
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:66:13: error:
'FE_INVALID' was not declared in this scope; did you mean 'EINVAL'?
66 | if (__fe & FE_INVALID)
| ^~~~~~~~~~
| EINVAL
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:68:13: error:
'FE_OVERFLOW' was not declared in this scope; did you mean 'EOVERFLOW'?
68 | if (__fe & FE_OVERFLOW)
| ^~~~~~~~~~~
| EOVERFLOW
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:70:13: error:
'FE_UNDERFLOW' was not declared in this scope; did you mean 'UNDERFLOW'?
70 | if (__fe & FE_UNDERFLOW)
| ^~~~~~~~~~~~
| UNDERFLOW
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h: In function 'int
__FEE(fp_except)':
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:81:11: error:
'FE_DIVBYZERO' was not declared in this scope
81 | __fe |= FE_DIVBYZERO;
| ^~~~~~~~~~~~
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:83:11: error:
'FE_INEXACT' was not declared in this scope
83 | __fe |= FE_INEXACT;
| ^~~~~~~~~~
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:85:11: error:
'FE_INVALID' was not declared in this scope; did you mean 'EINVAL'?
85 | __fe |= FE_INVALID;
| ^~~~~~~~~~
| EINVAL
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:87:11: error:
'FE_OVERFLOW' was not declared in this scope; did you mean 'EOVERFLOW'?
87 | __fe |= FE_OVERFLOW;
| ^~~~~~~~~~~
| EOVERFLOW
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:89:11: error:
'FE_UNDERFLOW' was not declared in this scope; did you mean 'UNDERFLOW'?
89 | __fe |= FE_UNDERFLOW;
| ^~~~~~~~~~~~
| UNDERFLOW
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h: In function 'fp_rnd
__FPR(int)':
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:98:7: error:
'FE_TONEAREST' was not declared in this scope
98 | case FE_TONEAREST:
| ^~~~~~~~~~~~
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:100:7: error:
'FE_DOWNWARD' was not declared in this scope
100 | case FE_DOWNWARD:
| ^~~~~~~~~~~
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:102:7: error: 'FE_UPWARD'
was not declared in this scope
102 | case FE_UPWARD:
| ^~~~~~~~~
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:104:7: error:
'FE_TOWARDZERO' was not declared in this scope
104 | case FE_TOWARDZERO:
| ^~~~~~~~~~~~~
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h: In function 'int
__FER(fp_rnd)':
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:117:10: error:
'FE_TONEAREST' was not declared in this scope
117 | return FE_TONEAREST;
| ^~~~~~~~~~~~
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:119:10: error:
'FE_DOWNWARD' was not declared in this scope
119 | return FE_DOWNWARD;
| ^~~~~~~~~~~
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:121:10: error:
'FE_UPWARD' was not declared in this scope
121 | return FE_UPWARD;
| ^~~~~~~~~
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:123:10: error:
'FE_TOWARDZERO' was not declared in this scope
123 | return FE_TOWARDZERO;
| ^~~~~~~~~~~~~
if everything was working well, this would be the chain of includes.
ieeefp.h
#include fenv.h ->
libstdc++ #2 fenv.h
#include_next fenv.h ->
libstdc++ #1 fenv.h
#include_next fenv.h ->
system
fenv.h
But instead, we get:
ieeefp.h
#include fenv.h ->
libstdc++ #2 fenv.h
#include_next fenv.h ->
libstdc++ #1 fenv.h
nothing
(because it shares include guards
with libstdc++ #2)
so system fenv.h is never reached.
