1 #*************************************************************************** 2 #*************************************************************************** 3 4 # File version for 'aclocal' use. Keep it a single number. 5 # serial 7 6 7 dnl CURL_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([CURL_OVERRIDE_AUTOCONF], [ 15 AC_BEFORE([$0],[AC_PROG_LIBTOOL]) 16 # using curl-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 77
