| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | #*************************************************************************** |
| 2 | #*************************************************************************** |
| 3 | |
| 4 | # File version for 'aclocal' use. Keep it a single number. |
| 5 | # serial 8 |
| 6 | |
| 7 | dnl CARES_OVERRIDE_AUTOCONF |
| 8 | dnl ------------------------------------------------- |
| 9 | dnl Placing a call to this macro in configure.ac after |
| 10 | dnl the one to AC_INIT will make macros in this file |
| 11 | dnl visible to the rest of the compilation overriding |
| 12 | dnl those from Autoconf. |
| 13 | |
| 14 | AC_DEFUN([CARES_OVERRIDE_AUTOCONF], [ |
| 15 | AC_BEFORE([$0],[AC_PROG_LIBTOOL]) |
| 16 | # using cares-override.m4 |
| 17 | ]) |
| 18 | |
| 19 | dnl Override Autoconf's AC_LANG_PROGRAM (C) |
| 20 | dnl ------------------------------------------------- |
| 21 | dnl This is done to prevent compiler warning |
| 22 | dnl 'function declaration isn't a prototype' |
| 23 | dnl in function main. This requires at least |
| 24 | dnl a c89 compiler and does not suport K&R. |
| 25 | |
| 26 | m4_define([AC_LANG_PROGRAM(C)], |
| 27 | [$1 |
| 28 | int main (void) |
| 29 | { |
| 30 | $2 |
| 31 | ; |
| 32 | return 0; |
| 33 | }]) |
| 34 | |
| 35 | dnl Override Autoconf's AC_LANG_CALL (C) |
| 36 | dnl ------------------------------------------------- |
| 37 | dnl This is a backport of Autoconf's 2.60 with the |
| 38 | dnl embedded comments that hit the resulting script |
| 39 | dnl removed. This is done to reduce configure size |
| 40 | dnl and use fixed macro across Autoconf versions. |
| 41 | |
| 42 | m4_define([AC_LANG_CALL(C)], |
| 43 | [AC_LANG_PROGRAM([$1 |
| 44 | m4_if([$2], [main], , |
| 45 | [ |
| 46 | #ifdef __cplusplus |
| 47 | extern "C" |
| 48 | #endif |
| 49 | char $2 ();])], [return $2 ();])]) |
| 50 | |
| 51 | dnl Override Autoconf's AC_LANG_FUNC_LINK_TRY (C) |
| 52 | dnl ------------------------------------------------- |
| 53 | dnl This is a backport of Autoconf's 2.60 with the |
| 54 | dnl embedded comments that hit the resulting script |
| 55 | dnl removed. This is done to reduce configure size |
| 56 | dnl and use fixed macro across Autoconf versions. |
| 57 | |
| 58 | m4_define([AC_LANG_FUNC_LINK_TRY(C)], |
| 59 | [AC_LANG_PROGRAM( |
| 60 | [ |
| 61 | #define $1 innocuous_$1 |
| 62 | #ifdef __STDC__ |
| 63 | # include <limits.h> |
| 64 | #else |
| 65 | # include <assert.h> |
| 66 | #endif |
| 67 | #undef $1 |
| 68 | #ifdef __cplusplus |
| 69 | extern "C" |
| 70 | #endif |
| 71 | char $1 (); |
| 72 | #if defined __stub_$1 || defined __stub___$1 |
| 73 | choke me |
| 74 | #endif |
| 75 | ], [return $1 ();])]) |
| 76 | |