https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109589
Bug ID: 109589
Summary: [14 regression] r14-35-g278f8f567b5470 breaks build
with older gcc build compilers
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: seurer at gcc dot gnu.org
Target Milestone: ---
g:278f8f567b5470e87e2e6482ee385d61c7f45a5d, r14-35-g278f8f567b5470
This update is causing build failures on a couple of our old RHEL 7.9 systems
if I use the system compiler. If I use a newer build compiler it works fine.
gcc -v
gcc version 4.8.5 20150623 (Red Hat 4.8.5-44) (GCC)
Is gcc 4.8.5 no longer suitable for builds?
make[2]: Entering directory '/home/seurer/gcc/git/build/gcc-test/gcc'
g++ -std=gnu++11 -c -g -O2 -DIN_GCC -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -fno-common
-DHAVE_CONFIG_H -DGENERATOR_FILE -I. -Ibuild
-I/home/seurer/gcc/git/gcc-test/gcc -I/home/seurer/gcc/git/gcc-test/gcc/build
-I/home/seurer/gcc/git/gcc-test/gcc/../include
-I/home/seurer/gcc/git/gcc-test/gcc/../libcpp/include \
-o build/genmodes.o /home/seurer/gcc/git/gcc-test/gcc/genmodes.cc
In file included from ./bconfig.h:3:0,
from /home/seurer/gcc/git/gcc-test/gcc/genmodes.cc:20:
./auto-host.h:2637:16: error: declaration does not declare anything
[-fpermissive]
#define rlim_t long
^
In file included from /home/seurer/gcc/git/gcc-test/gcc/genmodes.cc:21:0:
/home/seurer/gcc/git/gcc-test/gcc/system.h:500:23: error: declaration of C
function 'void* sbrk(int)' conflicts with
extern void *sbrk (int);
^
In file included from /home/seurer/gcc/git/gcc-test/gcc/system.h:302:0,
from /home/seurer/gcc/git/gcc-test/gcc/genmodes.cc:21:
/usr/include/unistd.h:1065:14: error: previous declaration 'void*
sbrk(intptr_t)' here
extern void *sbrk (intptr_t __delta) __THROW;
^
In file included from /home/seurer/gcc/git/gcc-test/gcc/genmodes.cc:21:0:
/home/seurer/gcc/git/gcc-test/gcc/system.h:508:48: error: new declaration
'char* strstr(const char*, const char*)'
extern char *strstr (const char *, const char *);
^
In file included from /usr/include/c++/4.8.2/cstring:42:0,
from /home/seurer/gcc/git/gcc-test/gcc/system.h:241,
from /home/seurer/gcc/git/gcc-test/gcc/genmodes.cc:21:
/usr/include/string.h:331:1: error: ambiguates old declaration 'const char*
strstr(const char*, const char*)'
strstr (const char *__haystack, const char *__needle) __THROW
^
In file included from /home/seurer/gcc/git/gcc-test/gcc/genmodes.cc:21:0:
/home/seurer/gcc/git/gcc-test/gcc/system.h:556:34: error: declaration of C
function 'const char* strsignal(int)' conflicts with
extern const char *strsignal (int);
^
In file included from /usr/include/c++/4.8.2/cstring:42:0,
from /home/seurer/gcc/git/gcc-test/gcc/system.h:241,
from /home/seurer/gcc/git/gcc-test/gcc/genmodes.cc:21:
/usr/include/string.h:562:14: error: previous declaration 'char*
strsignal(int)' here
extern char *strsignal (int __sig) __THROW;
^
In file included from ./bconfig.h:5:0,
from /home/seurer/gcc/git/gcc-test/gcc/genmodes.cc:20:
/home/seurer/gcc/git/gcc-test/gcc/../include/ansidecl.h:128:64: error: new
declaration 'char* basename(const char*)'
# define ATTRIBUTE_NONNULL(m) __attribute__ ((__nonnull__ (m)))
^
/home/seurer/gcc/git/gcc-test/gcc/../include/libiberty.h:112:64: note: in
expansion of macro 'ATTRIBUTE_NONNULL'
extern char *basename (const char *) ATTRIBUTE_RETURNS_NONNULL
ATTRIBUTE_NONNULL(1);
^
In file included from /usr/include/c++/4.8.2/cstring:42:0,
from /home/seurer/gcc/git/gcc-test/gcc/system.h:241,
from /home/seurer/gcc/git/gcc-test/gcc/genmodes.cc:21:
/usr/include/string.h:599:26: error: ambiguates old declaration 'const char*
basename(const char*)'
extern "C++" const char *basename (const char *__filename)
^
make[2]: *** [Makefile:2860: build/genmodes.o] Error 1
commit 278f8f567b5470e87e2e6482ee385d61c7f45a5d
Author: Richard Biener <rguent...@suse.de>
Date: Mon Mar 6 11:06:38 2023 +0100
RAII auto_mpfr and autp_mpz
