[Bug binutils/29866] Build stuck at "checking for ELF support in BFD..." for x86_64-w64-mingw32 host at canadian compilation

[amodra at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=29866

--- Comment #1 from Alan Modra <amodra at gmail dot com> ---
This is in libctf configure.  For me, I see the following in libctf/config.log:
configure:14586: checking for ELF support in BFD
configure:14606: ./libtool --quiet --mode=link x86_64-w64-mingw32-gcc -o
conftest.exe -I/home/alan/src/binutils-gdb/libctf/../include -I../bfd
-I/home/alan/src/binutils-gdb/libctf/../bfd -g -O2      -L../bfd -L../libiberty
-L../zlib  -Wl,--stack,12582912 conftest.c -lbfd -liberty -lz    >&5
configure:14606: $? = 0
configure:14614: result: yes

So the bug report is really asking "Why does my compiler hang?", and there
isn't any way for me to answer that.

My conftest.c for the test is:
/* confdefs.h */
#define PACKAGE_NAME "libctf"
#define PACKAGE_TARNAME "libctf"
#define PACKAGE_VERSION "1.2.0"
#define PACKAGE_STRING "libctf 1.2.0"
#define PACKAGE_BUGREPORT ""
#define PACKAGE_URL ""
#define STDC_HEADERS 1
#define HAVE_SYS_TYPES_H 1
#define HAVE_SYS_STAT_H 1
#define HAVE_STDLIB_H 1
#define HAVE_STRING_H 1
#define HAVE_MEMORY_H 1
#define HAVE_STRINGS_H 1
#define HAVE_INTTYPES_H 1
#define HAVE_STDINT_H 1
#define HAVE_UNISTD_H 1
#define __EXTENSIONS__ 1
#define _ALL_SOURCE 1
#define _GNU_SOURCE 1
#define _POSIX_PTHREAD_SEMANTICS 1
#define _TANDEM_SOURCE 1
#define PACKAGE "libctf"
#define VERSION "1.2.0"
#define LT_OBJDIR ".libs/"
#define _FILE_OFFSET_BITS 64
#define HAVE_STDLIB_H 1
#define HAVE_UNISTD_H 1
#define HAVE_SYS_PARAM_H 1
#define HAVE_GETPAGESIZE 1
/* end confdefs.h.  */
#include <stdlib.h>
             #include <string.h>
             #include "bfd.h"
             #include "elf-bfd.h"
int
main ()
{
(void) bfd_section_from_elf_index (NULL, 0);
             return 0;
  ;
  return 0;
}

The previous failed test in the log will give you your confdefs.h, which may be
different to mine.  If you run your conftest.c through your compiler by hand
and it hangs, then you likely have a problem with your compiler rather than
there being a libctf configure problem.

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