Date: Fri, 10 Apr 2015 20:17:13 -0700 From: Mark Millard <markmi@dsl-only.net> To: freebsd-toolchain@freebsd.org Cc: FreeBSD PowerPC ML <freebsd-ppc@freebsd.org> Subject: powerc64-xtoolchain-gcc with -m32 on powerpc64 vs. lib32/libedit and wchar_t use: gcc 4.9.1 forces __WCHAR_TYPE__ (underlying type?) long int Message-ID: <5B228278-A967-46D4-8F56-08E47008D009@dsl-only.net>
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I got the following when trying WITH_LIB32=3D with =
powerpc64-xtoolchain-gcc (on a powerpc64 box, WITHOUT_BOOT=3D ) :
> . . . parse.c:181:25: error: array of inappropriate type initialized =
from string constant
> const Char hex[] =3D STR("0123456789ABCDEF");
> ^
The rest of this note is about what I found when I looked into this. =
Read only if you care. File for later if you likely would care later? =20=
The libedit/Makefile uses -DWIDECHAR and libedit/chartype.h defines for =
that case:
> #define Char wchar_t
> . . .
> #define STR(x) L ## x
> #define UC(c) c
There were lots of warnings for incompatible pointer types for libedit/. =
. . including the following one that was explicit about which type is =
involved:
> note: expected 'const wchar_t *' but argument is of type 'long int *'
> int wcscmp(const wchar_t *, const wchar_t *) __pure;
> ^
So how did the long int type end up involved? I expect the following may =
contribute.
Turns out that long int (and L suffix use in __WCHAR_MAX__) is specific =
to 4.9.1 -m32 handling when compared to gcc 4.2.1 . . .
> # gcc -dM -E -m32 - < /dev/null | grep WCHAR
> #define __WCHAR_MAX__ 2147483647
> #define __WCHAR_TYPE__ int
> # /usr/local/bin/powerpc64-portbld-freebsd11.0-gcc-4.9.1 -dM -E -m32 - =
< /dev/null | grep WCHAR
> #define __WCHAR_MAX__ 2147483647L
> #define __WCHAR_MIN__ (-__WCHAR_MAX__ - 1)
> #define __GCC_ATOMIC_WCHAR_T_LOCK_FREE 2
> #define __WCHAR_TYPE__ long int
> #define __SIZEOF_WCHAR_T__ 4
and compared to -m64 for both 4.2.1 and 4.9.1 . . .
> # gcc -dM -E -m64 - < /dev/null | grep WCHAR
> #define __WCHAR_MAX__ 2147483647
> #define __WCHAR_TYPE__ int
> # /usr/local/bin/powerpc64-portbld-freebsd11.0-gcc-4.9.1 -dM -E -m64 - =
< /dev/null | grep WCHAR
> #define __WCHAR_MAX__ 2147483647
> #define __WCHAR_MIN__ (-__WCHAR_MAX__ - 1)
> #define __GCC_ATOMIC_WCHAR_T_LOCK_FREE 2
> #define __WCHAR_TYPE__ int
> #define __SIZEOF_WCHAR_T__ 4
(where I expect that __WCHAR_TYPE__ is the underlying type used for =
wchar_t).
The following ended up installed for the 4.9.1 compiler . . .
> #undef WCHAR_TYPE
> #define WCHAR_TYPE (TARGET_64BIT ? "int" : "long int")
> #undef WCHAR_TYPE_SIZE
> #define WCHAR_TYPE_SIZE 32
> =
/usr/local/lib/gcc/powerpc64-portbld-freebsd11.0/4.9.1/plugin/include/conf=
ig/rs6000/freebsd64.h
> #undef WCHAR_TYPE
> #define WCHAR_TYPE "long int"
> #undef WCHAR_TYPE_SIZE
> #define WCHAR_TYPE_SIZE 32
> =
/usr/local/lib/gcc/powerpc64-portbld-freebsd11.0/4.9.1/plugin/include/conf=
ig/rs6000/sysv4.h
=3D=3D=3D
Mark Millard
markmi at dsl-only.net
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