The constructor in the code for bug 16717 (below) gets called twice when
compiled by 3.3.4 with -
funit-at-a-time, but only once when called without -funit-at-a-time. This
sounds like the opposite of
bug 16717, which was marked as a 3.4 regression, and supposedly not a problem
in 3.3.4.
#include <stdio.h>
void hello (void) __attribute__ ((constructor));
void hello (void) { printf ("Hello world\n"); }
int main (void) { return 0; }
Here's the session:
[EMAIL PROTECTED] scripts 18:00:33
81> /usr/bin/g++ -v -funit-at-a-time
../cpp/bugfiles/GCC_bugfiles/noerror/16717-attr-
constructor.cpp
Reading specs from /usr/lib/gcc-lib/i586-suse-linux/3.3.4/specs
Configured with: ../configure --enable-threads=posix --prefix=/usr
--with-local-prefix=/usr/local --
infodir=/usr/share/info --mandir=/usr/share/man
--enable-languages=c,c++,f77,objc,java,ada --
disable-checking --libdir=/usr/lib --enable-libgcj
--with-gxx-include-dir=/usr/include/g++ --with-
slibdir=/lib --with-system-zlib --enable-shared --enable-__cxa_atexit
i586-suse-linux
Thread model: posix
gcc version 3.3.4 (pre 3.3.5 20040809)
/usr/lib/gcc-lib/i586-suse-linux/3.3.4/cc1plus -quiet -v -D__GNUC__=3
-D__GNUC_MINOR__=3 -
D__GNUC_PATCHLEVEL__=4 -D_GNU_SOURCE
../cpp/bugfiles/GCC_bugfiles/noerror/16717-attr-
constructor.cpp -D__GNUG__=3 -quiet -dumpbase 16717-attr-constructor.cpp
-auxbase 16717-attr-
constructor -version -funit-at-a-time -o /tmp/ccKqhSCv.s
GNU C++ version 3.3.4 (pre 3.3.5 20040809) (i586-suse-linux)
compiled by GNU C version 3.3.4 (pre 3.3.5 20040809).
GGC heuristics: --param ggc-min-expand=81 --param ggc-min-heapsize=96968
#include "..." search starts here:
#include <...> search starts here:
/usr/include/g++
/usr/include/g++/i586-suse-linux
/usr/include/g++/backward
/usr/local/include
/usr/lib/gcc-lib/i586-suse-linux/3.3.4/include
/usr/i586-suse-linux/include
/usr/include
End of search list.
/usr/lib/gcc-lib/i586-suse-linux/3.3.4/../../../../i586-suse-linux/bin/as -V
-Qy -o /tmp/ccgrP3v1.o
/tmp/ccKqhSCv.s
GNU assembler version 2.15.91.0.2 (i586-suse-linux) using BFD version
2.15.91.0.2 20040727 (SuSE
Linux)
/usr/lib/gcc-lib/i586-suse-linux/3.3.4/collect2 --eh-frame-hdr -m elf_i386
-dynamic-linker /lib/ld-
linux.so.2 /usr/lib/gcc-lib/i586-suse-linux/3.3.4/../../../crt1.o
/usr/lib/gcc-lib/i586-suse-linux/
3.3.4/../../../crti.o /usr/lib/gcc-lib/i586-suse-linux/3.3.4/crtbegin.o
-L/usr/lib/gcc-lib/i586-suse-
linux/3.3.4
-L/usr/lib/gcc-lib/i586-suse-linux/3.3.4/../../../../i586-suse-linux/lib
-L/usr/lib/gcc-
lib/i586-suse-linux/3.3.4/../../.. /tmp/ccgrP3v1.o -lstdc++ -lm -lgcc_s -lgcc
-lc -lgcc_s -lgcc /usr/
lib/gcc-lib/i586-suse-linux/3.3.4/crtend.o
/usr/lib/gcc-lib/i586-suse-linux/3.3.4/../../../crtn.o
[EMAIL PROTECTED] scripts 18:00:57
82> a.out
Hello world
Hello world
[EMAIL PROTECTED] scripts 18:01:07
83>
[EMAIL PROTECTED] scripts 18:01:08
83> /usr/bin/g++ -fno-unit-at-a-time
../cpp/bugfiles/GCC_bugfiles/noerror/16717-attr-
constructor.cpp
[EMAIL PROTECTED] scripts 18:01:37
84> a.out
Hello world
[EMAIL PROTECTED] scripts 18:01:39
85>
--
Summary: __attribute__((constructor)) called twice with -funit-
at-a-time
Product: gcc
Version: 3.3.4
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: flash at pobox dot com
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23472
