RE: wrong-type-argument in gud-tooltip-mode

[Herbert Euler <herberteuler@hotmail.com>]

Because some browser parses my last message incorrectly, let me put a
space character between "<" and "/dev/null" and send again.

> How about the patch below. There seems to be no point in running call-process
> with no input file. I could probably also remove the string-match for
> "\\`\\*.+\\*\\'" in gud-tooltip-mode too, as these buffers have no files
> associated with them anyway.

It works.  However, calling `call-process' with its second argument
(INFILE) set to nil here might not be trivial, since at least gcc
prints something when its input is /dev/null:

$ gcc -E -dM - < /dev/null
#define __DBL_MIN_EXP__ (-1021)
#define __FLT_MIN__ 1.17549435e-38F
#define __DEC64_DEN__ 0.000000000000001E-383DD
#define __CHAR_BIT__ 8
#define __WCHAR_MAX__ 2147483647
#define __DBL_DENORM_MIN__ 4.9406564584124654e-324
#define __FLT_EVAL_METHOD__ 2
#define __DBL_MIN_10_EXP__ (-307)
#define __FINITE_MATH_ONLY__ 0
#define __GNUC_PATCHLEVEL__ 3
#define __DEC64_MAX_EXP__ 384
#define __SHRT_MAX__ 32767
#define __LDBL_MAX__ 1.18973149535723176502e+4932L
#define __UINTMAX_TYPE__ long long unsigned int
#define __linux 1
#define __DEC32_EPSILON__ 1E-6DF
#define __unix 1
#define __LDBL_MAX_EXP__ 16384
#define __linux__ 1
#define __SCHAR_MAX__ 127
#define __USER_LABEL_PREFIX__
#define __STDC_HOSTED__ 1
#define __LDBL_HAS_INFINITY__ 1
#define __DEC64_MIN_EXP__ (-383)
#define __DBL_DIG__ 15
#define __FLT_EPSILON__ 1.19209290e-7F
#define __LDBL_MIN__ 3.36210314311209350626e-4932L
#define __DEC32_MAX__ 9.999999E96DF
#define __unix__ 1
#define __DECIMAL_DIG__ 21
#define __gnu_linux__ 1
#define __LDBL_HAS_QUIET_NAN__ 1
#define __GNUC__ 4
#define __FLT_HAS_DENORM__ 1
#define __DBL_MAX__ 1.7976931348623157e+308
#define __DBL_HAS_INFINITY__ 1
#define __DEC32_MIN_EXP__ (-95)
#define __LDBL_HAS_DENORM__ 1
#define __DEC128_MAX__ 9.999999999999999999999999999999999E6144DL
#define __DEC32_MIN__ 1E-95DF
#define __DBL_MAX_EXP__ 1024
#define __DEC128_EPSILON__ 1E-33DL
#define __LONG_LONG_MAX__ 9223372036854775807LL
#define __GXX_ABI_VERSION 1002
#define __FLT_MIN_EXP__ (-125)
#define __DBL_MIN__ 2.2250738585072014e-308
#define __DBL_HAS_QUIET_NAN__ 1
#define __DEC128_MIN__ 1E-6143DL
#define __REGISTER_PREFIX__
#define __DBL_HAS_DENORM__ 1
#define __NO_INLINE__ 1
#define __DEC_EVAL_METHOD__ 2
#define __i386 1
#define __FLT_MANT_DIG__ 24
#define __VERSION__ "4.2.3 20071123 (prerelease) (Debian 4.2.2-4)"
#define i386 1
#define __DEC64_EPSILON__ 1E-15DD
#define __DEC128_MIN_EXP__ (-6143)
#define __i486__ 1
#define unix 1
#define __i386__ 1
#define __SIZE_TYPE__ unsigned int
#define __DEC32_DEN__ 0.000001E-95DF
#define __ELF__ 1
#define __FLT_RADIX__ 2
#define __LDBL_EPSILON__ 1.08420217248550443401e-19L
#define __LDBL_DIG__ 18
#define __FLT_HAS_QUIET_NAN__ 1
#define __FLT_MAX_10_EXP__ 38
#define __LONG_MAX__ 2147483647L
#define __FLT_HAS_INFINITY__ 1
#define __DEC64_MAX__ 9.999999999999999E384DD
#define __DEC64_MANT_DIG__ 16
#define __DEC32_MAX_EXP__ 96
#define linux 1
#define __DEC128_DEN__ 0.000000000000000000000000000000001E-6143DL
#define __LDBL_MANT_DIG__ 64
#define __WCHAR_TYPE__ int
#define __FLT_DIG__ 6
#define __INT_MAX__ 2147483647
#define __i486 1
#define __FLT_MAX_EXP__ 128
#define __DBL_MANT_DIG__ 53
#define __DEC64_MIN__ 1E-383DD
#define __WINT_TYPE__ unsigned int
#define __LDBL_MIN_EXP__ (-16381)
#define __LDBL_MAX_10_EXP__ 4932
#define __DBL_EPSILON__ 2.2204460492503131e-16
#define __INTMAX_MAX__ 9223372036854775807LL
#define __FLT_DENORM_MIN__ 1.40129846e-45F
#define __FLT_MAX__ 3.40282347e+38F
#define __FLT_MIN_10_EXP__ (-37)
#define __INTMAX_TYPE__ long long int
#define __DEC128_MAX_EXP__ 6144
#define __GNUC_MINOR__ 2
#define __DEC32_MANT_DIG__ 7
#define __DBL_MAX_10_EXP__ 308
#define __LDBL_DENORM_MIN__ 3.64519953188247460253e-4951L
#define __STDC__ 1
#define __PTRDIFF_TYPE__ int
#define __DEC128_MANT_DIG__ 34
#define __LDBL_MIN_10_EXP__ (-4931)
#define __GNUC_GNU_INLINE__ 1

So I think if we prefer to keep the behavior the same as previous
(although some aspects of the previous behavior seem trivial), we
should use a patch like the following one.

Regards,
Guanpeng Xu



*** gdb-ui.el   9 Jan 2008 01:19:35 -0000       1.7.2.87
--- gdb-ui.el   28 Jan 2008 00:08:03 -0000
*************** (defun gdb-use-separate-io-buffer (arg)
*** 431,442 ****

  (defun gdb-create-define-alist ()
    "Create an alist of #define directives for GUD tooltips."
!   (let* ((file (buffer-file-name))
         (output
          (with-output-to-string
            (with-current-buffer standard-output
!             (call-process shell-file-name
!                           (if (file-exists-p file) file nil)
                            (list t nil) nil "-c"
                            (concat gdb-cpp-define-alist-program " "
                                    gdb-cpp-define-alist-flags)))))
--- 431,442 ----

  (defun gdb-create-define-alist ()
    "Create an alist of #define directives for GUD tooltips."
!   (let* ((file (and (buffer-file-name)
!                     (file-exists-p (buffer-file-name))))
         (output
          (with-output-to-string
            (with-current-buffer standard-output
!             (call-process shell-file-name file
                            (list t nil) nil "-c"
                            (concat gdb-cpp-define-alist-program " "
                                    gdb-cpp-define-alist-flags)))))
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