Hello, I'm working on porting GDB to C++03, and cross building for --host=x86_64-w64-mingw32 using Fedora 20's g++ (gcc version 4.8.4 20141219 (Fedora MinGW 4.8.4-1.fc20)), I'm stumbling on:
In file included from ../../src/gdb/../include/splay-tree.h:43:0,
from ../../src/gdb/dcache.c:26:
build-gnulib/import/inttypes.h:61:3: error: #error "This file assumes that
'int' has exactly 32 bits. Please report your platform and compiler to
<bug-gnulib@gnu.org>."
# error "This file assumes that 'int' has exactly 32 bits. Please report your
platform and compiler to <bug-gnulib@gnu.org>."
^
make: *** [dcache.o] Error 1
That's:
#if !(INT_MIN == INT32_MIN && INT_MAX == INT32_MAX)
# error "This file assumes that 'int' has exactly 32 bits. Please report your
platform and compiler to <bug-gnulib@gnu.org>."
#endif
The fixed inttypes.h includes stdint.h, however mingw's stdint.h requires
defining __STDC_LIMIT_MACROS:
/* 7.18.2 Limits of specified-width integer types */
#if !defined(__cplusplus) || defined(__STDC_LIMIT_MACROS) || \
defined(__GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L
/* 7.18.2.1 Limits of exact-width integer types */
#define INT8_MIN (-128)
#define INT16_MIN (-32768)
#define INT32_MIN (-2147483647 - 1)
#define INT64_MIN (-9223372036854775807LL - 1)
(...)
and gnulib is deciding that the system's stdint.h is good enough
At least, I don't get a stdint.h replacement. I do get an inttypes.h
replacement.
I'm pulling in the stdint and inttypes modules, and do AC_LANG_PUSH([C++])
before gl_EARLY -- in config.log I see autoconf is running tests with g++.
https://www.gnu.org/software/gnulib/manual/html_node/stdint_002eh.html
says:
" Portability problems fixed by Gnulib:
(...)
On some hosts that predate C++11, when using C++ one must
define __STDC_CONSTANT_MACROS to make visible the definitions of constant
macros
such as INTMAX_C, and one must define __STDC_LIMIT_MACROS to make visible the
definitions of limit macros such as INTMAX_MAX. "
I can work around this by defining __STDC_LIMIT_MACROS in gdb before
including stdint.h, but it sounds like I shouldn't need to. Thus I wonder
what am I missing.
I'm attaching a gzip'ed config.log.
Thanks,
Pedro Alves
config.log.gz
Description: application/gzip
