[STDCXX-843] [Sun C++] sizeof(mbstate_t) depends on #include order

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 4.2.0
• Fix Version/s: 4.2.1
• Component/s: 21. Strings

Environment

Sun C++

• Severity: Binary Incompatibility
• Assignee: Martin Sebor
• Reporter: Martin Sebor
• Created: 08/Apr/08 23:14
• Updated: 03/Jun/08 01:11
• Resolved: 08/Apr/08 23:25

Description

The size of the mbstate_t type and its aliiases (such as std::istream::traits_type::state_type)) appears to depend on the order in which stdcxx headers are #included:

$ cat u.cpp && gmake u.o && mv u.o v.o && gmake CPPOPTS=-DMAIN u LDOPTS=v.o && ./u
#ifdef MAIN

#  include <iomanip>
#  include <istream>

void mbstate_size (size_t);

int main ()
{
    mbstate_size (sizeof (std::istream::traits_type::state_type));
}

#else
#  include <assert.h>
#  include <wchar.h>
#  include <stdio.h>

void mbstate_size (size_t n)
{
    const size_t size = sizeof (mbstate_t);

    printf ("%zu == %zu\n", n, size);
    fflush (stdout);
    assert (n == size);
}
#endif
CC -c -D_RWSTDDEBUG   -mt -I/amd/devco/sebor/stdcxx/include -I/build/sebor/stdcxx-suncc-5.9-j1-15D/include -I/amd/devco/sebor/stdcxx/tests/include  -library=%none -g  -m64 +w -errtags -erroff=hidef   u.cpp
CC -c -D_RWSTDDEBUG   -mt -I/amd/devco/sebor/stdcxx/include -I/build/sebor/stdcxx-suncc-5.9-j1-15D/include -I/amd/devco/sebor/stdcxx/tests/include -DMAIN -library=%none -g  -m64 +w -errtags -erroff=hidef   u.cpp
CC u.o -o u -L/build/sebor/stdcxx-suncc-5.9-j1-15D/rwtest -lrwtest15D -library=%none  -mt  -m64 -L/build/sebor/stdcxx-suncc-5.9-j1-15D/lib v.o -R/build/sebor/stdcxx-suncc-5.9-j1-15D/lib:/build/sebor/stdcxx-suncc-5.9-j1-15D/rwtest -lstd15D  -lm 
24 == 32
Assertion failed: n == size, file u.cpp, line 24
Abort (core dumped)

Issue Links

• incorporates: STDCXX-826 [Sun C++] SIGABRT in istringstream example