bug#39118: Segfault while building on 64-bit Cygwin

[dsmich@roadrunner.com]

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Pretty sure that the missing readline symbol is because the macos
readline is being used/found instead of GNU readline.

	-Dale

	-----------------------------------------From: "John Cowan" 
To: "Ludovic Courtès"
Cc: 39118@debbugs.gnu.org, guile-devel@gnu.org
Sent: Friday January 24 2020 9:36:59AM
Subject: bug#39118: Segfault while building on 64-bit Cygwin

Both Cygwin and MacOS crash in pretty much the same way. By disabling
the JIT, I was able to get the Cygwin build to run to completion. On
MacOS with --disable-jit, however, I am now getting an entirely new
failure:
 CC readline.lo
readline.c:432:7: warning: implicitly declaring library function
'strncmp' with type 'int (const char *, const char *,
 unsigned long)' [-Wimplicit-function-declaration]
 if (strncmp (rl_get_keymap_name (rl_get_keymap ()), "vi", 2))
 ^
readline.c:432:7: note: include the header  or explicitly provide a
declaration for 'strncmp'
readline.c:432:16: warning: implicit declaration of function
'rl_get_keymap_name' is invalid in C99
 [-Wimplicit-function-declaration]
 if (strncmp (rl_get_keymap_name (rl_get_keymap ()), "vi", 2))
 ^
readline.c:432:16: warning: incompatible integer to pointer conversion
passing 'int' to parameter of type 'const char *'
 [-Wint-conversion]
 if (strncmp (rl_get_keymap_name (rl_get_keymap ()), "vi", 2))
 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3 warnings generated.
 CCLD guile-readline.la [1]
Undefined symbols for architecture x86_64:
 "_rl_get_keymap_name", referenced from:
 _scm_init_readline in readline.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see
invocation)

On Thu, Jan 23, 2020 at 3:35 PM Ludovic Courtès  wrote:
Hi,

 John Cowan  skribis:

 > Thanks. Unfortunately, the standard recipe for making core dumps on
Mac

 This bug report is about Cygwin, not macOS, right? :-)

 Ludo’.
  

Links:
------
[1] http://guile-readline.la
[2] mailto:ludo@gnu.org
[3] mailto:cowan@ccil.org


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